DAMAGE DUE TO
GALE FORCE WINDS -
13th
January 2010
A
low pressure of 998hPa passing from west to
eart over Sicily was the cause of the gale
force winds experience late overnight on the
13th January 2010.
Some damage was caused with trees uprooted,
paving tiles dislodged by the rough sea and
debris washed ashore. At Marsalforn Gozo, the
road along the beach was impassable as the
seas dislodged the promenade's tiling,
dragging some of the slabs onto the road. A
concrete block holding some of the railings
was also overturned.
Ċirkewwa also suffered structural damage as
concrete slabs bordering the sea were broken
apart and torn off their steel mesh. At least
two cars were scratched and dented by debris
blown about by the wind, one in Għaxaq and the
other in Ċirkewwa.
Highest gusts were as follows - Melieha
104.0km/h (Force 11), Nadur 86.9km/h (Force
9), Rabat 83.7km/h (Force 9), 82.1km/h at
Naxxar (Force 9), 80.4km/h at Zebbug Malta
(Force 9), 78.8 km/h at Attard (Force 9),
74.0km/h at Mgarr Malta (Force 8), 70.8km/h at
Zejtun (Force 8). Click on camera image above
for some photos of damage caused.
SEVERE THUNDERSTORM -
9th
November 2009
An
isolated thunderstorm at around noon affecting
mainly Victoria in Gozo produced some large
hail around 2cm in diameter (confirmed) or
possibly even a bit bigger (not confirmed).
The hail storm lasted around 10 minutes.
There was lots of wind shear on that day as
can be seen on the sounding on the right.
WATERSPOUT
- 14th October 2009
A
low pressure system with heavy rain showers,
especially in the northeastern parts of Malta,
produced a waterspout which lasted about 20-30
minutes at around 1.30pm. The only damage was
caused to a yacht Fekruna which was
taking part in a 15-nautical-mile warm-up race
prior to the Middle Sea Race. The waterspout
snapped the mast in two. Luckily no one was
injured.
As reported in
timesofmalta.com,
Dr Kevin Dingli, owner of Fekruna, said
"We could see the waterspout developing some
way away. It was huge. It kept moving about,
changing direction. At one point we gybed away
from it, but it came back," explained Dingli.
It all happened so quickly. When we realised
we were going to be hit, we let go sheets.
Then the wind caught us. We felt as though we
were being lifted up, about to be thrown over,
and then the mast snapped."
There was also some wind shear on that day although
this was not too pronounced. However, the
waterspout could have been produced in a
convergence zone of surface winds.
The highest 24-hour rainfall totals from noon
of the 14th till noon of the 15th were:
Kalkara 24.6mm and Zabbar 26.4mm.
Some photos of the waterspout can be
viewed by clicking
on the camera pic above.
HEAVY RAIN
- 1st/2nd October 2009
A
low pressure system with heavy rain and
thunderstorms moving in an easterly direction
over Sicily during the night of 1st/2nd
October killed at least 18 people in the
Messina region but also affected Malta,
although to a much lesser extent as no one was
injured in Malta and no damage was caused,.
The highest rainfall totals were: Bahrija
76.8mm, Mellieha 71.8mm, Bahar ic-Caghaq 68.6mm,
Qawra 63.1mm, Mosta 61.4mm, Kalkara 59.0mm,
Valletta 50.8mm.
Please note that most of this rainfall fell in
just 45 minutes early in the morning at around
5am.
Some lightning photos can be
viewed by clicking
on camera pic above.
STRONG WINDS AND HEAVY RAIN
- 23rd/24th September 2009
The strong east southeasterly wind on the
23rd whipped up rough seas in Birzebbuga and,
to a lesser extent, Marsaxlokk. Two cabin
cruisers broke their moorings in Birzebbuga.
One ended up on the rocks and the other on the
sandy beach. A smaller boat was smashed by the
waves and quite a number of boats were quickly
hauled ashore by their owners. In Mellieha a
car was damaged when a tree fell on top of it.
The highest wind speed in Mellieha was
98.1km/h (Force 10) at around 9.45pm with an average wind
speed at around 10pm of 79.3km/h (Force 9). A gust of
70.8km (Force 8) from an easterly direction was also
recorded at Mgarr at around 5.30pm.
A section of the bastion wall near police
headquarters in Floriana collapsed on the 24th
just before 10.30am, blocking the road. The wall
borders Argotti Gardens and appears to have
collapsed after this morning's heavy rain,
most of which fell in just 45 minutes! A
worker at the nearby National Audit Office said
they had heard a loud rumbling noise, "like
somebody digging underneath our office" as the
wall came down in a cloud of dust. Soldiers from the AFM's Maritime Squadron,
whose base is just down the road, were the first
on the scene to render assistance. Rescuers of
the Civil Protection Department checked that
there was no one underneath the rubble.
The highest rainfall totals were: Sannat
68.6mm, Luqa 58.2mm, Nadur 57.2mm,
Victoria 54.8mm, Xaghra 52.6mm, Gudja 51.4mm, Tarxien 50.0mm.
Please note that most of this rainfall fell in
just 45 minutes early in the morning at around
5am.
The bad weather was caused by a very vigorous
low pressure system rapidly moving northerly
from Libya.
Photos of damage can be
viewed by clicking
on camera pic above.
SEVERE THUNDERSTORM
- 9th September 2009
A
squall line crossing the Maltese
Islands spawned a number of funnel clouds and
at least one waterspout at around 6.30pm local
time. The sounding on the right taken
at around 8pm local time clearly shows wind shear. Rainfall amounts were not
particularly high, except in Gozo with 24-hour
rainfall amounts of 13.8mm and 12.2mm at Xaghra
and Gharb respectively. Warning was issued.
Photos of waterspout can be
viewed by clicking
on camera pic above.
SEVERE THUNDERSTORM
- 31st March 2009
A
squall line associated with a vigorous low
pressure system crossing the Maltese
Islands early this morning spawned a dry
macroburst from high-based
thunderstorms. The sounding on the right taken
at around 5am shows a sounding typical of a
dry macroburst.
A macroburst is
an intense downdraft generated
from the thunderstorm as the raindrops
evaporate and the downdraft reaches the ground
not accompanied by rain. The air - cooled by
evaporating rain - crashes downward almost
like a rock in a pond. The cooler, denser air
accelerates downward and then spreads rapidly
outward in strong gusty winds near the
surface.
Two cars were damaged when a
wall collapsed in Fgura in an incident which is
thought to have been caused by these strong
winds. The south-south easterly wind, which was
at its strongest at about 4 am, is also thought
to have been the cause of a number of stones
falling from an apartment block in St Julians.
The stones fell onto the roof of an adjoining
house, causing a partial collapse. No one was
injured. The strong wind also uprooted trees in
several localities, notably at Sta Lucija.
Policemen and members of the Civil Protection
Department were on hand to give assistance.
Maximum gusts
at around 4.15am associated with this macroburst
which affected mainly the southern and eastern
parts of Malta were:
86.9km/h at Zebbug,
88.6km/h at Naxxar, 92.0km/h at Msida, 93.0km/h
at Tarxien, 83.7km/h at Zejtun and 80.6km/h at
Iklin. These maximum wind speeds correspond to
Force 9 and 10 on the Beaufort scale.
One can also view the graph to the left (wind
speed in blue at top) at Zebbug Malta.
To view some damage caused by storm please click
on camera pic above.
HURRICANE FORCE 12 WIND GUSTS
- 4th March 2009
A
deep low pressure system with central pressure
of 989hPa passed to the north of the Maltese
Islands dragging with it a warm front late on
Wednesday 4th March 2009 which brought with it
some scattered rain and a rather humid and
warm air mass. This was followed by the
passage of a cold front bringing with it a
strong veering of winds.
Cars were damaged by falling stones in
Mellieha and St Julians and a sailing yacht went
adrift between Manoel Island and Ta' Xbiex last
night as gale force winds battered the Maltese
islands.
A police spokesman said reports of damage
were received from all over Malta as well as
Gozo. The cars in Mellieha and St Julian's were
damaged when walls collapsed.
The Armed Forces of Malta said the skipper of
the sailing yacht 'Fusion' alerted the AFM's
Operations Centre that his vessel was adrift
between Manuel Island and Ta' Xbiex. The
Maritime Squadron's search-and-rescue launch
'Melita-1' was deployed and managed to secure
the yacht alongside the Gozo-ferry berth in Sa
Maison, Pieta`.
The Civil Protection Department was also busy
on the roads, clearing debris strewn over the
streets by the strong wind and the rain. Four
sizeable tree trunks were reported to the AFM
after they were found blocking Council of Europe
Road in Luqa. The AFM deployed a bulldozer which
cleared the road. The AFM also cleared debris
from a collapsed wall in Mdina Road, Zebbug.
Trees were uprooted in many localities,
including a large 40-year-old tree near the law
courts in Valletta. At Zabbar a bus shelter was
pulled from its mountings by the wind. Hoardings
in a number of localities were also damaged.
Damage was also reported to the Xarolla
windmill in Zurrieq,, which dates back to the
time of the knights. The windmill was built in
1724 and was restored in 1992. It was
administered by the local council and was a
popular cultural venue. Last night's wind
destroyed nearly all of its vanes.
A maximum gust of 142.5 km/h from the SSE
was registered at Mellieha at 22.11 local time.
Other localities also experienced strong wind
gusts, with maximum gusts as follows: Zejtun =
85.1km/h, Zebbug (Malta) = 109.2km/h, Mgarr = 92.5km/h, Naxxar = 85.3km/h,
Rabat = 92.5km/h, Nadur = 103.0km/h.
SEVERE
THUNDERSTORM
- 5th January 2009
A
vigorous low pressure system passed over the
Maltese Islands from early Monday 5th January
2009 with thunderstoms and heavy rain showers
from time to time. The worst storm was one
that passed over the Maltese Islands around
mid-morning with torrential rain in some areas
(esecially central and harbour areas of Malta),
hail about 1.2cm to 1.5cm in Valletta (which
however melted quickly unlike last week) and a
brief waterspout which lasted about 5 minutes
just off Marsascala at 10:35am.
What is
interesting is that the triple point of this low
pressure system either passed over or very close
to the Maltese Islands at around this time (as
can be seen in the weather chart below). A radar
image of this particular storm is also taken
some time after. The highest 24-hour rainfall
total for this day was again at Valletta with
87.0mm. There was flooding in the usual
low-lying areas of Malta with some cars being
carried away by the flood waters. However, no
damages or injuries were reported.
Click on camera pic to view the only photo we
have of this waterspout (thanks to Chris
Holland). A warning for both
heavy rain and waterspouts was issued by
Meteo Malta 24 hours previously.
THUNDERSTORMS WITH HAIL DRIFTS
- 27th December 2008
A
squall line with isolated thunderstorms crossed
the Maltese Islands early this morning affecting
mainly the Grand Harbour area, especially
Valletta.
Although this particular line of thunderstoms
that crossed the Maltese Islands from a westerly
direction does NOT qualify as severe, it still
caused quite a rare phenomenon here in Malta
with very deep hail drifts in Valletta
resembling snow drifts in some streets!
The largest hail stones were only around 1.2cm
to 1.5cm in size but the huge quantity of them
was really impressive. Rainfall in Valletta from
this storm amounted to 36.2mm.
This thunderstorm was part of a line of
thunderstorms known as a squall line. There was
quite a lot of instability associated with this
squall line with a very moist air from 12,000 to
16,000 feet. This led to the production of lots
of hail as temperatures at this level were
around -10 to -20 degrees Celsius. There was
also wind shear from about 5,000 feet upwards
and with 60-knot winds at 35,000 feet at anvil
level.
Click on camera pic to view some photos of the
hail drifts in Valletta and also watch video
below (thanks to Arist Cordina)
SEVERE THUNDERSTORM
- 11th December 2008
A
vigorous cold front passing over the Maltese
Islands this morning caused heavy rainfall, very
strong gusts and hail 1cm large in Dingli. This
cold front was part of a deep low pressure
system (central sea-level pressure 998hPa
centred over the Tyrrhenian Sea). Rainfall at
Balzan was 29.8mm till 5pm. Thunderstorms were
moving SSE-NNW. Maximum gusts were the
following: 83.7km/h at Zebbug Malta, 111.0km/h
at Mellieha and 99.9km/h at Mgarr Malta at
11:15am during a severe thunderstorm (this
reading is now confirmed). Hail 1 inch (2.5cm)
in size has now also been confirmed from the
same storm at Rabat. The large hail broke a
number of feast lights. Lots of moisture was present in the
atmosphere at all levels together with a speed
shear as can be seen in the sounding of 10am
above.
A wall collapsed at San Gwann, shipping
movements were halted at Malta Freeport, and
flooding was reported in several localities as
heavy rain fell over Malta today in between
strong gusts of wind. A spokesman for the Civil
Protection Department said that rescuers were
called out to help as many cars stalled,
particularly in Msida, Birkirkara and
Marsascala. The police this afternoon issued
warnings urging drivers to avoid Birkirkara and
Msida valleys.Fire engines were called to
several localities to pump water out of flooded
homes.
Trees in a number of localities were broken
by the wind. At Marsaxlokk, fishermen stayed
awake all night as several boats slipped their
moorings but no serious damage was caused. At
one time traffic could not pass throught
Burmarrad due to the flood waters present. Click
on camera pic to view some photos of this stormy
weather.
HEAVY THUNDERY RAIN SHOWERS
- 3rd/4th December 2008
A
deep low pressure system (central sea-level
pressure 994hPa - see animated satellite image
to the right) formed just to the south of
Malta and passed over the Maltese Islands during
the night Wednesday/Thursday with heavy rain and
isolated thunderstorms with gusty winds. Highest
rainfall was 78.2mm at Bahrija, while the
highest gust was an 85.3km/h at Mellieha. No
damage or injuries were reported.
FORCE 11 GUSTS
AT MELLIEHA
- 28th November 2008
A fish farm was one of the casualties of the
high winds and rough seas Friday 28th November
2008 when the cargo vessel Carl C crashed into
it, while several other ships were either
delayed or unable to enter Grand Harbour, among
them three cruise liners. The Carl C made it to
Grand Harbour at about 7.30 p.m.
These strong winds were caused by the
approach of the cold front of a very intense low
pressure system (central sea-level pressure
990hPa - see surface analysis chart to the right) towards the Maltese Islands.
Maximum wind speed measured was 114.8km/h from a
southeasterly direction at 06:58am at Mellieha.
This weather station is situated on top of the
Red Tower.
The 100-metre cargo ship was off Xrobb
l-Għaġin carrying out engine repairs when it
started dragging its two anchors and was swept
onto two fish pens. Two tugboats were dispatched
to assist the ship and the army and civil
protection department were placed on alert. It
was not immediately known how much damage, if
any, was caused. Attempts to release the ship
got underway in the morning and the pen was
expected to be towed into harbour to assess the
damage.
Port operations came to a standstill because
pilots weren't boarding ships for safety
reasons, leaving the cruise liners Costa
Concordia and Grand Celebration waiting outside
Grand Harbour for some time. Another, the
Celebrity Century, cancelled its call. The Malta
Maritime Authority said another eight ships were
unable to make harbour. At the Freeport, cranes
couldn't be operated because of the strong wind.
The police said no accidents as a result of the
weather conditions were reported.
WATERSPOUT TO THE SOUTH OF MALTA
- 10th November 2008
A
waterspout was seen just off the coast to the
south of Malta moving ESE-WNW from Blue Grotto
to Ghar Lapsi for about 20 minutes from 11.30am.
This waterspout remained at sea and no damage
was reported. There was a notable shift in
surface wind direction from ENE to ESE at the
time of this waterspout. Another waterspout was seen off
the Sliema Front at 2.10pm. The day consisted of heavy
thundery rain showers at times. A moist and
unstable atmosphere was present over the central
Mediterranean
together with some wind shear (as
can be seen on sounding to the right) helped to
create the instability. A warning for both heavy
rain and waterspouts was issued by Meteo Malta
24 hours previously.
Photos of the
waterspout can
be viewed by clicking on the camera pic.
WATERSPOUT TO THE NORTH OF GOZO
- 8th October 2008
A
waterspout was seen just off Xwejni Bay in Gozo
at around 5.30pm with heavy rainfall
falling from the same cloud also seen. This
waterspout remained at sea and no damage was
reported. A moist and unstable atmosphere was
present over the central Mediterranean
together with some wind shear (as
can be seen on sounding to the right) helped to
create the instability.
Photos of the
waterspout can
be viewed by clicking on the camera pic.
HEAVY THUNDERSTORMS AND FLOODS
- 1st October 2008
In the early hours of
1st October 2008, heavy rainfall
and thunderstorms caused
lots of flooding in the usual
low-lying areas of Malta and Gozo, with
some people having to be rescued from their
cars. An ambulance was one of the vehicles that
got caught in the heavy water current in
Birkirkara at 2 a.m. and CPD director Peter
Cordina, who coordinated the various rescue
operations, said the vehicle was towed to safer
grounds. Once its engine re-started, it
continued on its way to hospital. Fields were flooded and some rubble walls
collapsed. Some trees and
billboards were blown down at Bahar ic-Caghaq,
which suffered the heaviest rainfall. The severe
lightning also damaged appliances and equipment
mainly in Attard, Lija and Iklin. Firemen
were also deployed to Popeye Village in Anchor
Bay to extinguish a fire started by lightning
early yesterday morning. The roof of a farmhouse
in Sta Venera caved in but, luckily, no one was
inside the room at the time. In excess of 80mm was recorded
within a few hours in some localities.
The highest rainfall was
recorded at Bahar ic-Caghaq with 88.8mm.
Other localities with heavy rainfall include:
Mgarr (Malta) 86.3mm, Qawra 76.6mm, Sannat
70.2mm, Mellieha 64.8mm, Iklin 64.7mm, Bahrija
64.6mm & Msida 59.6mm. This heavy rainfall was
caused by the passage of a moist frontal system.
Jet stream winds aloft and a clear wind shear (as
can be seen on sounding to the right) helped to
create the instability.
Photos of the
lightning can
be viewed by clicking on the camera pic.
WATERSPOUT TO THE SOUTHEAST OF MALTA - 28th
September 2008
On 28th
September 2008, a
waterspout was seen to the southeast of Malta,
just off the coast at Marsascala and Marsaxlokk at around
8.45am. This lasted about
10 to 15 minutes. The cloud that produced this
waterspout seemed to be a large cumulus or
shallow cumulonimbus as no
lightning strikes were reported from this
particular cloud. The was a upper-level trough
to the north and a cold front to the south. The
atmosphere was unstable and wind shear was also
present (see sounding to the right), although it
was in an abnormal anti-clockwise direction. The lifted
index was of 0.2 with a CAPE of only
198J/kg. Sea temperature was a warm 24°C.
This paticular cloud moved NE-SW and did not
affect any land area of the Maltese Islands,
although a squall from this cloud caused the
sinking of a cabin cruiser which took in a lot
of water and sank due to localised high waves. Photos of the
cloud and its associated waterspout can
be viewed by clicking on the camera pic.
DAMAGING
GREGALE WIND - 24th
January 2008
A fierce
northeasterly wind and rough seas caused by the
clash of a low pressure system to the southeast
of Malta and a strong high pressure system over
Europe (as can be seen in the synoptic map to
the right) lashed Malta throughout the day and
caused damage all along the east coast, with
boats slipping their moorings at St Paul's Bay,
St Julians and Sliema Creek. Tiles were
dislodged at The Strand promenade in
Sliema/Gzira. Some small boats in Spinola were
smashed to pieces. Winds were averaging Force 8
and gusting Force 10 in exposed areas. Our
weather station at Mellieha in fact measured
gusts by to 96.2km/h.
At the Jews Sally Port, below
the Valletta bastions, a Toyota Vitz was almost
washed away by the waves, which carried it onto
the rocks. The driver, a 70-year-old man from
Valletta, was lucky to escape unhurt, having
been assisted out of the car by SAG police who
happened to be on a patrol nearby. At St Julians
traffic had to be diverted because of seawater
on the road while at Marsascala a kiosk had
window panes broken and plastic chairs and
tables scattered over a wide area.
The police also reported that
a 59-year-old Italian resident of Naxxar was
injured in the afternoon when he was hit by a
water tank as he walked along High Street, St
Julians. He was taken to hospital where his
injuries were found not to be serious. The tank
is thought to have been blown by the wind.
Photos of the
rough sea can
be viewed by clicking on the camera pic.
BRIEF SMALL TORNADO
- 18th January 2008
On
18th January 2008, at
around 8.205am a small tornado was seen briefly to
the WNW of San Gwann for about 5 minutes. There
also was a report of the same tornado to
the southwest of Maghtab over Madliena. Yet
another report and photos show the tornado just
off the coast at Sliema at around 8.15am.
The clouds and tornado were
moving NE-SW. As can be seen from the
sounding and hodograph to the right there was an
unusual type of wind shear - anticlockwise wind
shear, but this was enough to create this brief
tornado. Weather at the time of the tornado was isolated showers with small hail -
there were no reports of any strong wind or
damage caused.
Photos of the
tornado can
be viewed by clicking on the camera pic.
HEAVY THUNDERSTORMS AND FLOODS
- 29th December 2007
On
29th December 2007, in the
afternoon and throughout the
night,heavy rainfall
and thunderstorms caused
lots of flooding in the usual
low-lying areas of Malta and Gozo, with
some people having to be rescued from their
cars. Fields were flooded and some rubble walls
collapsed. Various telephone
connections were also damaged. The beach at
Ramla Bay in Gozo was carved out by the flood
waters. In excess of 100mm was recorded
within a period of 24 hours from noon of the
29th to noon of 30th December.
The highest rainfall was
recorded in Mellieha with 165.8mm. This heavy
rainfall was caused by a low pressure
system over the central Mediterranean
which was practically
stationary due to very light upper level winds.
Photos of the
hail can
be viewed by clicking on the camera pic.
SEVERE THUNDERSTORM
- 16th November 2007
On 16th November 2007, in the
morning around 8.30am, a severe thunderstorm caused some havoc
in Gozo with heavy rain showers and large hail
about 1 inch in diameter. The large hail dented
cars and destroyed crops. A brief waterspout was
also seen from Gozo. Strong
lightning from this super cell cumulonimbus
cloud
was also present in various localities. During
the storm gusts of 93.3km/h and 74.0km/h were recorded at
Mellieha and Zebbug Malta respectively.
The storms were caused due to strong wind shear
and very moist and unstable air over the Maltese
Islands. A warm and moist surface SSE
airflow together with a drier and cool upper air
westerly flow contributed to this severe weather. The
wind shear situation was in fact very
similar to that found in the USA in spring, as
can also be confirmed from the hodograph..
CAPE readings were over 1200J/kg with a lifted
index of -4.8 (click on sounding to the right).
Photos of the
hail can
be viewed by clicking on the camera pic.
STRONG WINDS DUE TO MEDITERRANEAN CYCLONE OVER
SICILY
- 22nd October 2007
Gale force winds buffetted
the island on 22 October 2007, giving the Civil
Protection Department a busy time as trees were
uprooted and moored boats sank. The force eight
wind howled throughout the night as thunder and
lightening ripped through the sky. CPD head
Peter Cordina said his men were kept busy
clearing roads from fallen trees and branches.
One man had a lucky escape when his boat, moored
in St Julians, sank. "The man got onto
another boat to try and save his own, but
unfortunately that boat started to sink too," Mr
Cordina said. In the end, members of the CPD had
to come to his rescue. A number of other boats
were torn away from their moorings and met the
same fate, he said.
Three electricity poles were toppled over
during the night, a spokesman for Enemalta said.
The wind also pushed down a periphery wall
surrounding part of Mater Dei Hospital. On
Sunday night the police reported that branches
ripped off a tree fell onto a moving car and the
two occupants had to be treated for shock.
This strong WNW winds with
gusts of over 100km/h at Melieha was caused by a
Mediterranean Cyclone that formed over Sicily
due to the bitter cold northerly winds clashing
with the warm Mediterranean Sea.
Rainfall totals were not
especially high with mean rainfall only 22mm or
so, but at one time during this storm, around
10pm or so at Cirkewwa, it seemed like a
hurricane with torrential rainfall and very
strong winds, as witnessed by Mark and Chris.
Photos of the
storm can
be viewed by clicking on the camera pic.
LARGE WATERSPOUT TO THE NORTHEAST OF GOZO
- 20th OCtober 2007
On 20th
October 2007, a
large waterspout was seen to the northeast of
Qala, Gozo at around 9.30am. This lasted about
10 minutes. The cloud that produced this
waterspout seemed to be a large cumulus as no
lightning strikes were reported from this
particular cloud. The was a negatively-tilted upper-level trough
to the north and speed shear was definitely
present (see sounding to the right). The lifted
index was of -3.0 with a CAPE of almost
1000J/kg. Sea temperature was a warm 23
°C.
This paticular cloud moved WNW-ESE and did not
affect any land area of the Maltese Islands. Photos of the
cloud and its associated waterspout can
be viewed by clicking on the camera pic.
HEAVY THUNDERSTORMS
AND FLOODS
- 25th September 2007
On 25th June 2007, a
short-wave upper-level trough produced an
Mesoscale Convective System (MCS) which passed
over the Maltese Islands during the early
morning causing heavy thundery rain
showers and blustery gusts especially over Gozo.
Cars with people inside were carried away by the
flood waters at Bahar ic-Caghaq, while strong
gusts broke off some big tree branches in Gozo
between Nadur and Victoria. Some big boulders at
Dahlet Qorrot in Gozo were dislodged by the rain
and these crashed down in front of some boat
houses. Luckily no one was injured in any of
these incidents.
Today’s heavy
rainfall and thunderstorms were caused due to
an short-wave upper-level low pressure system
which passed quickly over the
central Mediterranean bringing relatively cold
air over a warm sea, creating a great deal of
instability with lots of clouds and heavy rain
showers and thunderstorms.
There was lots of moisture in the atmosphere and
the lifted index was of -5.8 and CAPE of 1751J/Kg
(click on sounding to the right). Some rainfall totals for this
storm
(from around 5am to 10pm) for some localities
were: Bahar ic-Caghaq 40.8mm, Kalkara 30.6mm,
Zurrieq 30.4mm, Nadur 50.4mm, Zebbug Gozo 50.8mm,
Gharb 59.8mm.
Photos of the
storm can
be viewed by clicking on the camera pic.
HEAVY THUNDERSTORMS
AND FLOODS
- 4th June 2007
On 4th June 2007, heavy rain
showers and thunderstorms struck Malta causing
lots of flooding in
the usual low-lying areas of Malta with cars
being carried away by the flood waters
too. Some small hail also fell in a few localities.
Photos of an uncofirmed funnel clouds can also
be seen in the photo gallery.
Today’s heavy
rainfall and thunderstorms were caused due to
an upper-level low pressure system over the
central Mediterranean bringing relatively cold
air over a warm sea, creating a great deal of
instability with lots of clouds and heavy rain
showers and thunderstorms.
There was lots of moisture in the atmosphere and
the lifted index was of -3.1 and CAPE of 884J/Kg
(click on sounding to the right). Worst hit were
the extreme south and the central parts of the
island. Some rainfall totals for the whole day
(from around 9am to 6pm) for some localities
were: Zurrieq 99.2mm, Bahar ic-Caghaq 97.8mm,
Iklin 90.0mm, San Gwann 83.9mm, Naxxar 76.0mm,
Qormi 73.8mm, Balzan 68.0mm, Msida 63.6mm,
Siggiewi 62.6mm. Gozo had hardly any rain!
This storm broke all records for June and has
already made June 2007 the wettest June ever
since rainfall records began in Valletta in
1865! The previous wettest June was in 1915 with
34.5mm of rainfall.
Photos of the
storms and floods can
be viewed by clicking on the camera pic.
SEVERE THUNDERSTORMS
- 24th December 2006
On 24th December 2006, in the
morning, severe thunderstorms caused some havoc
in Malta with heavy rain showers and flooding in
the usual low-lying areas of Malta. Strong
lightning and large hail
was also present in various localities. Hail at
least one inch in size (see photo) fell in Gzira
damaging some cars parked there. There was also
a report of a funnel cloud close to the airport.
Gusts of 82km/h were recorded at Zebbug and
88.5km/h at Mellieha.
The storms were caused due to strong wind shear
and very moist and unstable air over the Maltese
Islands. A warm and moist surface southeasterly
airflow together with a drier and cool upper air
flow contributed to this severe weather. The
wind shear situation was in fact very
similar to that found in the USA in spring.
CAPE readings were over 900J/kg with a lifted
index of -4.6 (click on sounding to the right).
Photos of the
storms and damage can
be viewed by clicking on the camera pic.
SEVERE THUNDERSTORM
- 5th October 2006
An
isolated thunderstorm moving in from the
northwest affected the Maltese Islands, especially
Gozo, where heavy rain caused severe flooding
and an unconfirmed tornado at Xlendi. An
unconfirmed tornado was also reported at
Golden Bay, while 1cm hail was reported at
Qrendi. Winds were very strong during this
storm with a gust of 107km/h (57 knots) at
Mellieha
at around 4.10pm. The unconfirmed brief
tornado at Xlendi uprooted some trees
and brought down a few rubble walls. The small
sandy beach at Xlendi was also practically
washed away by the floodwaters. The
heaviest rainfall was reported in Zebbug
86.2mm, Marsalforn 54.0mm, Victoria 41.0mm and
Sannat 34.4mm. A relatively weak dry line oriented
southwest-northeast was present together with
a lifted index of -6.6 and a CAPE of over
2000J/kg. The hodograph was oriented
southwest-northeast too indicating that a good
wind shear was present (click on sounding to
the right). Photos of the
damage at Xlendi can
be viewed by clicking on the camera pic.
WATERSPOUT OVER ST THOMAS BAY
- 18th July 2006
An
isolated thunderstorm moving in from the
northeast affected the extreme northeast of
Malta, especially Marsascala, Zabbar and the
Cottonera area. Heavy rainfall was measured in
these areas lasting for about 2 hours in
Marsascala from 11.30am to 1.30pm. Rainfall
measured was 46.0mm at Marsascala, 28.2mm at
Vittoriosa and 25.0mm at Zabbar. A waterspout
lasting about 10 minutes was also seen over St Thomas Bay, Marsascala
at around 11.45am. This
storm was caused due
to a dry line that was oriented
northwest-southeast, denoting a sharp contrast
between very humid air on one side and much
drier air on the other side. During this storm
it was noted that the wind was blowing from
the southwest over much of Malta, with gusts
up to 33.3km/h at Zebbug at 12.12pm (during
the height of the storm). This definitely
helped the inflow into this storm. Photos of the
waterspout at St Thomas Bay can
be viewed by clicking on the camera pic.
STORM FORCE 11 WINDS
- 1st February 2006
It
was extremely windy from late 31st January
till early 1st February as a low pressure
system moving slowing to our east intensified
suddenly to 993hPa, causing very strong
northeasterly winds over the Maltese Islands.Highest gusts
were81.4km/h at the
Airport, 70.3km/h at
Rabat, 75.9km/h at
Msida, 82.0km/h at
Nadur, and at
Mellieha an extremely high gust of
109.2km/h (Force 11)!
Winds were averaging Force 9 gusting Force 11
over exposed areas of the Maltese Islands.
It was inevitable that such strong winds would
cause damage in several areas. Civil
Protection Department chief Peter Cordina said
that the department had received reports of
uprooted trees, electricity cables and poles,
collapsed stone rubble walls and twisted
television aerials.
A car suffered extensive damage when a tree
fell onto it, although no one was injured, and
part of the wall in the Regional Road tunnel
in the direction of Swieqi was also damaged. Photos of the
rough seas on this day can
be viewed by clicking on the camera pic.
TORNADO AND FLOODING
- 13th December 2005
Malta once again bore the
brunt of heavy rain and
thunderstorms as roads flooded on Tuesday
morning. Albeit
being a public holiday, this morning's heavy
rain caught many people by surprise, bringing
the traffic to a standstill in many areas.
During the storm, the emergency number was down,
the police said. A
tornado was also reported at Marsascala in the
early morning.
Photos of the damage
caused by this tornado can
be viewed by clicking on the camera pic.
During the heavy downpour, which began just
after 0500CET, an average of
55.1
millimeters of rain fell in
approximately four hours.
In fact, the highest rainfall
was at Msida with 91.5mm. Several roads
were closed, as a number of areas known for
flooding problems were temporarily cut off.
These included Msida, Balzan, Birkirkara, Marsa
and areas in the south of Malta.
Members of the Civil Protection Department and
Armed Forces personnel braved the heavy rain to
assist people, mainly motorists, who found
themselves in difficulty whilst driving through
flooded areas. An official spokesman for the
Civil Protection Department said that a house in
Gzira collapsed and a big wall in Valley Road
was knocked down by flood waters. No one was
injured.
ALMOST SEVERE THUNDERSTORM - 22nd November
2005
A
thunderstorm affecting mainly Gozo and Mellieha
early this afternoon produced heavy rainfall,
hail up to 1.5cm large (if the hail had been
just 4mm larger it would have qualified as a
severe thunderstorm!) and strong gusts of wind.
Rotation of the cloud base was also noted.
Photos of this hail can
be viewed by clicking on the camera pic.
Rainfall from this storm was estimated at around
10mm.
POSSIBLE BRIEF TORNADO AT ST PAUL'S BAY - 19th
November 2005
A
thunderstorm with gusts up to 43.5 knots (80.3
km/h) at Mellieha hit the Maltese Islands early
this morning. The thunderstorm passed at around
6.30am but did not last long. Lightning was
rather strong and flooding was reported in
various localities, such as B'Kara and Msida. A
high garden boundary wall in St Paul's Bay was
demolished by an alleged brief tornado, according to maltarightnow.com. Highest rainfall was in
Valletta with 10.8 mm.
A thunderstorm hit the
Maltese islands early in the
morning, bringing with it torrential
rainfall and severe lightning
with lightning strikes hitting Mellieha and
Nadur. The rains caused flooding on parts
of the islands,
leaving motorists stranded in their vehicles,
reports Malta Media. To assist them, members of
the Civil Protection Department were dispatched,
as well as being on-hand to offer help with the
traffic congestion caused. The timing of the
storm did not help, with many caught up in the
morning rush-hour when the heavy rain hit.
Several valleys were also flooded during the
storm. The Civil
Protection Department assisted about 50 people
including a group of students in Birkirkara, who
were waiting for school transport during the
heavy downpour. In Siggiewi, the
newly-constructed road - which formed part of
the 16kilometres of roads financed by the Fifth
Italian Protocol -- overflowed with waste water
as the water lifted all the manhole covers. In
Hamrun, the ceiling of a house collapsed but no
one was injured. Strong straight-line
gusts of 44.0 knots (81.4 km/h) were recorded at Luqa Airport and Rabat during the storm.
Highest rainfall was 82.2 mm at Nadur, Gozo.
Click on the camera pic
above to view photos taken of this storm from
Xlendi, Gozo.
Many
areas of the Maltese Islands were hit by a
squall line, where the wind changed direction
and increased in speed very quickly. At one
time gusts were reaching 37.8 knots (70km/h).
It was around 7.50am when the calm summer
atmosphere took a sudden turn for the worse
when the light southeasterly wind was replaced
by a very strong northwesterly wind, together
with some isolated rain showers, low clouds
and even some fog. The strong wind shocked
some people as they heard their shutters
banging and saw outside furniture and potted
plants tossed around. Large trees were also
swaying in the strong wind. This however
lasted just 6 minutes or so.
An
alleged tornado was reported by
maltarightnow.com at Safi early in the
afternoon today. The alleged tornado only
lasted a few moments and developed while some
parents were waiting for their children at the
local primary school. Witnesses said that the
wind increased suddenly and lots of dust and
bits and pieces were blown into the air, while
others found it difficult to walk and had to
shelter behind a wall. No damage was reported.
This website concludes that this was more
likely to be a strong straight-line wind
rather than a tornado.