Reports

End of Month Reports

February 2019 Sets New Records

Air Temperature

Highest Maximum 19.4°C 2nd
Lowest Maximum 10.6°C 24th
Highest Minimum 13.2°C 2nd
Lowest Minimum 3.9°C 23rd

 

Mean Maximum 15.3°C
Mean Minimum 9.7°C
Mean 12.5°C

 

 

Relative Humidity

Highest Relative Humidity 74% 4th, 5th, 23rd and 26th
Lowest Relative Humidity 40% 23rd

 

Mean Relative Humidity 60.6%

 

 

Atmospheric Pressure

Highest Atmospheric Pressure 1030hPa 15th, 17th and 18th
Lowest Atmospheric Pressure 1002hPa 2nd

 

Mean Atmospheric Pressure 1019.9hPa

 

 

Wind

Highest Gust 101.0km/h 24th

 

Mean Wind Speed 11.0km/h
Mean Gust Speed 40.1km/h
Mean Wind + Gust Speed 25.6km/h
Most Frequent Wind Direction Northwest

 

 

Precipitation

Total Rainfall During February 2019 39.1 mm
Total Rainfall Since Last 01/09 398.3 mm

 

Highest 24 Hour Total 11.6 mm 5th

 

Rain Days 9
Thunderstorm Days 4
Hail Days 2

 

 

Rainfall Events

03/02/2019 3.2 mm Thunder Rain and Hail Shower
04/02/2019 10.2 mm Periods of Steady Rain
05/02/2019 11.6 mm Thundery Rain and Hail Shower
07/02/2019 0.6 mm Rain Shower
09/02/2019 0.9 mm Rain Shower
16/02/2019 0.8 mm Rain Shower
23/02/2019 6.9 mm Rain and Hail Showers
24/02/2019 2.8 mm Rain and Hail Showers
28/02/2019 3.0 mm Rain Shower

 

 

February 2019 Compared to the Climate Means

  Climate Mean February 2019 Anomaly
Mean Maximum Temperature 15.7°C 15.3°C -0.4°C
Mean Minimum Temperature 9.5°C 9.7°C +0.2°C
Mean Temperature 12.6°C 12.5°C -0.1°C
Mean Relative Humidity 78% 60.6% -17.4%
Mean Atmospheric Pressure 1016.6hPa 1019.9hPa +3.3hPa
Mean Wind Speed 19.1 km/h 25.6km/h +6.5km/h
Most Frequent Wind Direction Northwest Northwest
Total Rainfall 61.6 mm 39.1 mm -29.2 mm
Total Rainfall Since Last 01/09 497.8 mm 398.3 mm -99.5 mm
Total Rain Days 11 9 -2
Total Thunderstorm Days 3 4 +1
Total Hail Days 1 2 +1

 

February 2019 Sets New Records

The month of February was around average with regards to temperature. Averaging at 12.5˚C, the mean air temperature was only 0.1˚C colder than the norm. Rainfall in February was substantially below the mean at our Għarb weather station. Despite this, most localities in the Maltese Islands experienced a wetter February, particularly across central and southern Malta. The total of 39.1 mm fell over 9 days. Hail was observed on 4 of these. Thunder was heard on only 2 days, however. February set new records with regards to wind. February is typically a windy month. This year, it was certainly no different. The highest gust last month was registered at 101km/h from the Southeast. This was the strongest ever recorded at our weather station in Għarb. It was during the worst Gregalata since 1982.

 

 

 

 

 

 

 

 

Severe Weather Reports

Severe Gregale on 23&24/02/2019

This was the strongest wind since the year 1982. A gust of 101km/h (Force 10) broke the long-standing wind gust record at our weather station in Għarb. The storm-force winds left behind a trail of destruction. In this report, we’ll describe what gave rise to this intense system and why it affected the Maltese Islands so badly.

It was classified as an intense Mediterranean cyclone. The Mediterranean cyclone that formed late on Saturday 23/02 and lasted till late on Sunday 24/02, was the very first since the one in November 2014. A strong jet-stream blew some very warm and humid air masses from the Ionian Sea, the Gulf of Gabes and the Gulf of Sirte towards the central Mediterranean. Simulateneously, frigid air from over the Balkans penetrated the central Mediterranean, initiating the process of Mediterranean Cyclone development. This cold air mass caused temperatures to drop rapidly all around the Maltese Islands. In fact, the temperature at our weather station in Għarb dropped by over 11°C in around 3 hours; starting at 15.4°C and dipping to 3.9°C. That is also the coldest so far this winter. The strong wind made temperatures feel even colder. Here, in the central Mediterranean both air masses clashed together. The ingredients were in place for an intense Mediterranean Cyclone to develop. As a result of their clash, an existing low pressure system started intensifying very quickly, in a process referred to as cyclogenesis in meteorology. In fact, atmospheric pressure at its center dropped drastically, and a Mediterranean Cyclone was officially formed.

The Mediterranean Cyclone affected Malta from late on Saturday 23/02 and lasted till late on Sunday 24/02 . As the cyclone made its way towards Malta, the islands were affected by several bands of convection located around the storm’s center. These produced heavy rain and thunderstorms. Some of the thunderstorms were very strong with severe gusts, moderate hail and funnel events. The storm generated waves of up to 10.1 metres and a storm surge.

According to weather stations, close to 100 mm of rain was measured in less than 24 hours in the worst hit areas. The storm-force winds produced substantial damage. The damage included uprooted trees, collapsed walls and downed power lines. The latter caused lengthy power-cuts in some areas. A number of areas suffered extensive flooding high enough to carry cars in some areas. The very high waves and storm surge caused great damage to coastal resorts, leading to a number of small sandy beaches being washed away.

 

 

 

 

End of Month Reports

Colder January 2019

Air Temperature

Highest Maximum 17.2°C 18th
Lowest Maximum 10.6°C 4th
Highest Minimum 12.4°C 18th
Lowest Minimum 5.7°C 5th

 

Mean Maximum 14.2°C
Mean Minimum 9.4°C
Mean 11.8°C

 

 

Relative Humidity

Highest Relative Humidity 74% 14th and 18th
Lowest Relative Humidity libido-de.com/ 27% 7th

 

Mean Relative Humidity 58.3%

 

 

Atmospheric Pressure

Highest Atmospheric Pressure 1026.3hPa 4th and 16th
Lowest Atmospheric Pressure 987hPa 25th

 

Mean Atmospheric Pressure 1013.0hPa

 

 

Wind

Highest Gust 77.2km/h 14th

 

Mean Wind Speed 13.6km/h
Mean Gust Speed 44.2km/h
Mean Wind + Gust Speed 28.9km/h
Most Frequent Wind Direction Northwest

 

 

Precipitation

Total Rainfall During January 2018 64.9 mm
Total Rainfall Since Last 01/09 359.2 mm

 

Highest 24 Hour Total 12.1 mm 9th

 

Rain Days 19
Thunderstorm Days 2
Hail Days 6

 

Rainfall Events

03/01/2019 1.3 mm Light Rain and Hail
06/01/2019 2.5 mm Light Rain and Hail
09/01/2019 12.1 mm Showers
10/01/2019 1.0 mm Light Rain
11/01/2019 2.0 mm Light Rain
12/01/2019 0.3 mm Light Rain
13/01/2019 2.0 mm Showers
14/01/2019 7.9 mm Showers
17/01/2019 2.4 mm Showers
19/01/2019 3.6 mm Showers
20/01/2019 6.6 mm Thundery Rain and Hail Showers
22/01/2019 2.8 mm Showers
23/01/2019 0.8 mm Light Rain
24/01/2019 8.4 mm Rain and Hail Showers
25/01/2019 6.4 mm Rain and Hail Showers
26/01/2019 1.7 mm Showers
27/01/2019 0.3 mm Light Rain
29/01/2019 2.3 mm Thundery Rain and Hail Showers
30/01/2019 0.5 mm Light Rain

 

 

January 2019 Compared to the Climate Means

  Climate Mean January 2019 Anomaly
Mean Maximum Temperature 15.6°C 14.2°C -1.4°C
Mean Minimum Temperature 9.8°C 9.4°C -0.4°C
Mean Temperature 12.7°C 11.8°C -0.9°C
Mean Relative Humidity 79% 58.3% -20.7%
Mean Atmospheric Pressure 1018.2hPa 1013.0hPa -5.2hPa
Mean Wind Speed 18.9 km/h 28.9km/h +10.0km/h
Most Frequent Wind Direction Northwest Northwest
Total Rainfall 94.1 mm 64.9 mm -29.2 mm
Total Rainfall Since Last 01/09 436.2 mm 359.2 mm -77.8 mm
Total Rain Days 14 19 +5
Total Thunderstorm Days 3 2 -1
Total Hail Days 1 6 +5

 

Colder January 2019

The month of January was noticeably colder than average. Averaging at 11.8˚C, the mean air temperature was 0.9˚C colder than the norm. The difference was far more pronounced in the daytime highs. Rainfall in January was below the average for this time of year at our weather station in Għarb. Despite this, most localities in the Maltese Islands experienced a wetter January. The total of 64.9 mm fell over 19 days. Hail was observed on 6 of these. Thunder was hard on only 2 days, however. According to measurements at our Għarb weather station, the Maltese Islands have started falling behind in total rainfall since last September 1st. January is typically a windy month, locally. This year, it was no different. The highest gust last month was registered at 77.2 km/h from the Northwest. Several other gales occured over the course of the month. Overall, January was more blustery than usual. The average wind speed of 28.9 km/h was far higher than the climate norm for this parameter.