Reports

    Rainfall Reports
    September 1, 20190

    September 2018 to August 2019 Rainfall Report

    Precipitation Totals

     

    Total Rainfall in September 2018 5.0 mm
    Total Rainfall in October 2018 217.8 mm
    Total Rainfall in November 2018 54.5 mm
    Total Rainfall in December 2018 17.0 mm
    Total Rainfall in January 2019 64.9 mm
    Total Rainfall in February 2019 39.1 mm
    Total Rainfall in March 2019 56.8 mm
    Total Rainfall in April 2019 27.5 mm
    Total Rainfall in May 2019 21.1 mm
    Total Rainfall in June 2019 0.0 mm
    Total Rainfall in July 2019 1.3 mm
    Total Rainfall in August 2019 0.2 mm

     

    Total Rainfall from 1st September 2018 till 31st August 2019 505.2 mm

     

    Highest 24 Hour Total 43.8 mm 18th October 2018

     

    Rain Days 90 days
    Thunderstorm Days 24 days
    Hail Days 12 days

     

     

    2018/2019 Precipitation Compared to the Climate Means

      Climate Mean 2018/2019 Anomaly
    Total Rainfall in September 2018 55.5 mm 5.0 mm -50.5 mm
    Total Rainfall in October 2018 83.3 mm 217.8 mm +134.5 mm
    Total Rainfall in November 2018 93.6 mm 54.5 mm -39.1 mm
    Total Rainfall in December 2018 109.7 mm 17.0 mm -92.7 mm
    Total Rainfall in January 2019 94.1 mm 64.9 mm -29.2 mm
    Total Rainfall in February 2019 61.6 mm 39.1 mm -22.5 mm
    Total Rainfall in March 2019 40.7 mm 56.8 mm +16.1 mm
    Total Rainfall in April 2019 23.2 mm 27.5 mm -+4.3 mm
    Total Rainfall in May 2019 10.6 mm 21.1 mm +10.5 mm
    Total Rainfall in June 2019 4.4 mm 0.0 mm -4.4 mm
    Total Rainfall in July 2019 0.3 mm 1.3 mm +1.0 mm
    Total Rainfall in August 2019 8.6 mm 0.2 mm -8.4 mm

     

    Total Rainfall Since Last 01/09 585.6 mm 505.2 mm -80.4 mm

     

    Total Rain Days 84 90 +6 days
    Total Thunderstorm Days 26 24 -2 days
    Total Hail Days 8 12 +4 days

     

    Rainfall Events

    Date Rainfall Description
    14/09/2018 0.8 mm Light Rain Shower
    20/09/2018 0.5 mm Light Thunderstorm
    21/09/2018 0.8 mm Light Rain Shower
    25/09/2018 1.5 mm Shower
    27/09/2018 1.4 mm Shower
    02/10/2018 16.2 mm Thunderstorm; Steady Rain
    03/10/2018 3.0 mm Shower
    04/10/2018 30.2 mm Thunderstorm
    05/10/2018 0.5 mm Light Rain Shower
    08/10/2018 6.8 mm Thunderstorm
    11/10/2018 1.6 mm Light Rain Shower
    12/10/2018 42.7 mm Downpour; Thunderstorm
    13/10/2018 16.0 mm Downpour
    14/10/2018 17.4 mm Showers; Light Rain; Thunderstorm
    18/10/2018 43.8 mm Thunderstorm
    22/10/2018 1.2 mm Light Rain
    23/10/2018 15.1 mm Thunderstorm
    29/10/2018 0.3 mm Light Rain Shower
    31/10/2018 23.0 mm Steady Rain
    01/11/2018 7.8 mm Isolated Showers
    02/11/2018 3.7 mm Isolated Showers
    10/11/2018 18.5 mm Thunderstorms
    11/11/2018 3.6 mm Light Rain
    15/11/2018 3.4 mm Light Rain
    16/11/2018 0.3 mm Light Rain Shower
    17/11/2018 5.6 mm Isolated Showers
    18/11/2018 1.5 mm Light Rain Shower
    20/11/2018 0.3 mm Light Rain Shower
    25/11/2018 0.8 mm Drizzle
    26/11/2018 0.3 mm Drizzle
    28/11/2018 7.7 mm Isolated Showers
    29/11/2018 1.3 mm Light Rain Shower
    01/12/2018 2.2 mm Thunderstorm
    02/12/2018 4.2 mm Shower
    04/12/2018 0.3 mm Drizzle
    07/12/2018 6.7 mm Thunderstorm; Shower
    08/12/2018 0.3 mm Drizzle
    15/12/2018 1.4 mm Thunderstorm
    18/12/2018 1.3 mm Light Rain
    21/12/2018 0.3 mm Drizzle
    24/12/2018 0.3 mm Drizzle
    03/01/2019 1.3 mm Light Rain/Hail
    06/01/2019 2.5 mm Light Rain/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 Drizzle
    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/Hail Showers
    22/01/2019 2.8 mm Showers
    23/01/2019 0.8 mm Light Rain
    24/01/2019 8.4 mm Rain/Hail Showers
    25/01/2019 6.4 mm Rain/Hail Showers
    26/01/2019 1.7 mm Shower
    27/01/2019 0.3 mm Drizzle
    29/01/2019 2.3 mm Thundery Rain/Hail Showers
    30/01/2019 0.5 mm Drizzle
    03/02/2019 3.2 mm Thundery Rain/Hail Showers
    04/02/2019 10.2 mm Showers; Steady Rain
    05/02/2019 11.6 mm Thundery Rain/Hail Showers; Steady Rain
    07/02/2019 0.6 mm Shower
    09/02/2019 0.9 mm Shower
    16/02/2019 0.8 mm Shower
    23/02/2019 6.9 mm Rain/Hail Showers
    24/02/2019 2.8 mm Rain/Hail Showers
    28/02/2019 3.0 mm Shower
    02/03/2019 0.5 mm Isolated Shower
    06/03/2019 0.5 mm Heavy Dewfall
    10/03/2019 0.3 mm Heavy Dewfall
    12/03/2019 0.3 mm Light Rain Shower
    15/03/2019 2.0 mm Light Rain
    18/03/2019 0.3 mm Heavy Dewfall
    21/03/2019 27.4 mm Thunderstorm
    22/03/2019 2.5 mm Light Rain
    24/03/2019 0.3 mm Heavy Dewfall
    27/03/2019 22.7 mm Thunderstorm
    04/04/2019 1.8 mm Light Rain
    05/04/2019 19.1 mm Thunderstorm
    07/04/2019 4.3 mm Isolated Showers
    14/04/2019 2.0 mm Isolated Showers
    22/04/2019 0.3 mm Light Thunderstorm
    03/05/2019 7.8 mm Showers
    04/05/2019 0.5 mm Light Thunderstorm
    12/05/2019 2.5 mm Light Thunderstorm
    13/05/2019 0.3 mm Drizzle
    14/05/2019 2.3 mm Light Rain
    16/05/2019 5.6 mm Thunderstorm
    26/05/2019 1.8 mm Light Thunderstorm
    30/05/2019 0.3 mm Light Rain
    16/07/2019 1.3 mm Shower
    29/08/2019 0.2 mm Light Rain

     

    End of Month Reports
    September 1, 20190

    Hotter August 2019

    Air Temperature

    Highest Maximum 35.8°C 1st
    Lowest Maximum 29.8°C 19th
    Highest Minimum 25.6°C 14th
    Lowest Minimum 22.7°C 1st

     

    Mean Maximum 32.3°C
    Mean Minimum 24.2°C
    Mean 28.3°C

     

    Relative Humidity

    Highest Relative Humidity 73% Several days
    Lowest Relative Humidity 17% 1st

     

    Mean Relative Humidity 59.3%

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1019.0hPa 21st
    Lowest Atmospheric Pressure 1009.5hPa 14th

     

    Mean Atmospheric Pressure 1015.1hPa

     

    Wind

    Highest Gust 53.1km/h 14th

     

    Mean Wind Speed 5.8km/h
    Mean Gust Speed 25.2km/h
    Mean Wind + Gust Speed 15.5km/h
    Most Frequent Wind Direction Northwest

     

    Precipitation

    Total Rainfall During August 2019 0.2 mm
    Total Rainfall Since Last 01/09 https://southafrica-ed.com/kamagra-in-south-africa/ 505.2 mm

     

    Highest 24 Hour Total 0.2 mm 29th

     

    Rain Days 1
    Thunderstorm Days 0
    Hail Days 0

     

    Rainfall Events

    29/08/2019

    		 0.2 mm

    Light Rain Shower


    August 2019 Compared to the Climate Means     

      Climate Mean August 2019 Anomaly
    Mean Maximum Temperature 31.4°C 32.3°C +0.9°C
    Mean Minimum Temperature 22.7°C 24.2°C +1.5°C
    Mean Temperature 27.1°C 28.3°C +1.2°C
    Mean Relative Humidity 73% 59.3% -13.7%
    Mean Atmospheric Pressure 1015.4hPa 1015.1hPa -0.3hPa
    Mean Wind Speed 13.0 km/h 15.5km/h +2.5km/h
    Most Frequent Wind Direction Northwest Northwest 0°
    Total Rainfall 8.6 mm 0.2 mm -8.4 mm
    Total Rainfall Since Last 01/09 585.6 mm 505.2 mm -80.4 mm
    Total Rain Days 1 1 0
    Total Thunderstorm Days 0 0 0
    Total Hail Days 0 0 0


    Hotter August 2019

    The intense above-average summer heat showed no signs of cooling off in August. In fact, the average temperature exceeded the climate average of 27.1°C on a total of 26 out of 31 days. The maximum temperature for August was registered at the height of a heat spell starting in July and spanning into August, when the mercury hit 35.8°C on the 1st. The 14th and 29th, on the other hand, proved to be a breath of fresh air to the Maltese Islands, when the maximum temperature remained below 30°C. A strong wind characterised the former, whilst some rain was measured on the latter.

    Our weather station in Għarb recorded precipitation on one day, the 29th. A total of 0.2 mm were measured. This fell in a brief light rain shower. Total rainfall in August was 8.4 mm lower than average. It is quite common to experience a completely dry August.

    Humidity was also low when compared to the norm. This was due to the higher than average temperatures over the course of this month.

    Atmospheric pressure was fractionally lower than what one would expect in August. This may be attributed to the fact that two zones of low pressure affected us this month. Anticyclonic conditions dominated the rest of the month.

    The wind was also stronger than usual. This is the result of lower than average atmospheric pressure. The strongest gust was measured at 53 km/h from the Northwest on the 19th, during an unstable patch in the middle of August.

     

    End of Month Reports
    August 1, 20190

    Hotter July 2019

    Air Temperature

    Highest Maximum 38°C 9th
    Lowest Maximum 28°C 16th
    Highest Minimum 26°C 9th
    Lowest Minimum 22°C Several nights

     

    Mean Maximum 31.4°C
    Mean Minimum 23.5°C
    Mean 27.5°C

     

    Relative Humidity

    Highest Relative Humidity 73% Several days
    Lowest Relative Humidity 14% 9th

     

    Mean Relative Humidity 60.3%

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1021.1hPa 21st
    Lowest Atmospheric Pressure 1004.6hPa 28th

     

    Mean Atmospheric Pressure 1013.7hPa

     

    Wind

    Highest Gust 51km/h 16th

     

    Mean Wind Speed 8.8km/h
    Mean Gust Speed 29.5km/h
    Mean Wind + Gust Speed 19.2km/h
    Most Frequent Wind Direction West Northwest

     

    Precipitation

    Total Rainfall During July 2019 1.3 mm
    Total Rainfall Since Last 01/09 https://southafrica-ed.com/kamagra-in-south-africa/ 505.0 mm

     

    Highest 24 Hour Total 1.3 mm 16th

     

    Rain Days 1
    Thunderstorm Days 1
    Hail Days 0

     

    Rainfall Events

    15/07/2019 0.0 mm Showers
    16/07/2019 1.3 mm Heavy Rain Shower

     

    July 2019 Compared to the Climate Means 

      Climate Mean July 2019 Anomaly
    Mean Maximum Temperature 31.2°C 31.4°C +0.2°C
    Mean Minimum Temperature 21.8°C 23.5°C +1.7°C
    Mean Temperature 26.5°C 27.5°C +1.0°C
    Mean Relative Humidity 69% 60.3% -8.7%
    Mean Atmospheric Pressure 1015.7hPa 1013.7hPa -2.0hPa
    Mean Wind Speed 13.3 km/h 19.2km/h +5.9km/h
    Most Frequent Wind Direction Northwest West Northwest -22.5°
    Total Rainfall 0.3 mm 1.3 mm +1.0 mm
    Total Rainfall Since Last 01/09 577.0 mm 505.0 mm -72.0 mm
    Total Rain Days 0 1 +1
    Total Thunderstorm Days 0 1 +1
    Total Hail Days 0 0 0


    Hotter July 2019

    2019’s July weather was characterised by air temperatures that were higher than the climate norm. Standing at 27.5°C, the mean air temperature was a solid 1.0°C higher than the norm. The average maximum temperature was calculated at 31.4°C, a marginal 0.2°C higher than the average for a normal July. The average minimum temperature, at 23.5°C, exceeded the climate value by a significant 1.7°C. Using the national criteria for a heatwave, we can say that no heat waves affected the Maltese Islands in July 2019. Several heat spells did though. The hottest day was the 9th, when the maximum temperature soared to 38.3°C. The sea offered little respite from the intense heat, as its temperature shot up to a maximum of 27°C on some days.

    Our weather station in Għarb recorded precipitation on one day, the 16th. A total of 1.3 mm were measured. This fell in a heavy rain shower which lasted for only a minute. Rain in July is rare, but not unheard of. Thunder was also heard on one day. This was in the form of a rumble or two of thunder as an isolated thunderstorm skimmed past the Maltese Islands early on the 15th.

    Humidity was also low when compared to the norm. This was due to the higher than average temperatures over the course of this month.

    Atmospheric pressure was lower than what one would expect in July. This may be attributed to the fact that three zones of low pressure affected us this month. Two of these were quite intense for this time of year.

    The wind was also stronger than usual. This is the result of lower than average atmospheric pressure. The strongest gust was measured at 51 km/h from the West Northwest on the 16th, during an unstable patch in the middle of July.

    End of Month Reports
    July 1, 20190

    June 2019 was the Hottest June on Record

    Air Temperature

    Highest Maximum 37°C 9th
    Lowest Maximum 22°C 1st
    Highest Minimum 25°C 10th
    Lowest Minimum 15°C 1st

     

    Mean Maximum 30.7°C
    Mean Minimum 21.5°C
    Mean 26.1°C

     

    Relative Humidity

    Highest Relative Humidity 73% 18th, 24th, 25th and 26th
    Lowest Relative Humidity 5% 22nd

     

    Mean Relative Humidity 50.5%

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1022.4hPa 8th
    Lowest Atmospheric Pressure 1009.1hPa 12th

     

    Mean Atmospheric Pressure 1015.6hPa

     

    Wind

    Highest Gust 50km/h 15th

     

    Mean Wind Speed 6.7km/h
    Mean Gust Speed 21.0km/h
    Mean Wind + Gust Speed 13.9km/h
    Most Frequent Wind Direction South Southwest

     

    Precipitation

    Total Rainfall During June 2019 0.0 mm
    Total Rainfall Since Last 01/09 503.7 mm

     

    Highest 24 Hour Total 0.0 mm

     

    Rain Days 0
    Thunderstorm Days 0
    Hail Days 0

     

    June 2019 Compared to the Climate Means 

      Climate Mean June 2019 Anomaly
    Mean Maximum Temperature 28.2°C 30.7°C +2.5°C
    Mean Minimum Temperature 19.3°C 21.5°C +2.2°C
    Mean Temperature 23.8°C 26.1°C +2.3°C
    Mean Relative Humidity 71% 50.5% -20.5%
    Mean Atmospheric Pressure 1015.8hPa 1015.6hPa -0.2hPa
    Mean Wind Speed 15.2 km/h 13.9km/h -1.3km/h
    Most Frequent Wind Direction Northwest South Southwest -112.5°
    Total Rainfall 4.4 mm 0.0 mm -4.4 mm
    Total Rainfall Since Last 01/09 576.7 mm 503.7 mm -73.0 mm
    Total Rain Days 1 0 -1
    Total Thunderstorm Days 0 0 0
    Total Hail Days 0 0 0


    June 2019 was the Hottest June on Record

    With a monthly average temperature of 26.1°C, June 2019 was the hottest June on record in the Maltese Islands. It broke the record set in June 2003. The average maximum temperature was calculated at 30.7°C, a solid 2.5°C higher than the average for a normal June. Nights were also rather warm. The average minimum temperature of 21.5°C was 2.2°C warmer than what one would expect in a typical June. Using the national criteria for a heatwave, we can conclude that the Maltese Islands experienced two heatwaves during this month. The first lasted for a period of four days, from 09/06/2019 to 12/06/2019. The maximum temperature measured during the first heatwave was of 37°C on 09/06/2019. The second heatwave also lasted for four days, from 21/06/2019 till 24/06/2019. The maximum temperature measured during the second heatwave was of 35°C on 24/06/2019. Despite this, it was the persistence of above average temperatures, rather than the hot temperatures themselves, that led to this June becoming the hottest on record. Another thing worth noting was the unseasonably cool first week of June. With an average temperature of just 20.9°C, the first week of June was the coolest on record.

    For the first time in a number of years, June 2019 was also completely dry. Not a drop of rain was measured at our weather station in Għarb. Thunder was not heard at any point in June.

    Humidity was also extremely low when compared to the norm. This was due to the relentless intense heat over the course of this month.

    Atmospheric pressure conformed with the mean for this time of year, as normal anticyclonic behaviour was noted.

    The wind was also lighter than usual. The strongest gust was measured at 50.0 km/h from the East Southeast on the 14th, during a brief break in between the two heatwaves.

     

    Reports, Updates
    June 17, 20190

    June so far / Ġunju sa issa

    With an average high of 29.7 C and an average low of 20.7 C, June 2019 has so far been more than 2 C warmer than normal. That’s more than the 0.25 C forecast at the start of the month. The maximum temperature so far this month was reached on the 9th, when it had soared to a sweltering 37 C. That was just more than 10 C hotter than the mean for that time of year. With a low of 25 C, the following night was the warmest so far this month. Having reached mid-month, we can safely say that June 2019 is now following the same pattern as in June 2012 and June 2017, two years with very hot summers. Just two weeks ago, many were fearing that there would be no summer this year. This fear was for very good reason too, as the beginning of June was one of the most unsettled on record.

    In contrast to what long-term maps showed some weeks ago, the latest versions almost all agree that summer will be hotter than average by at least 1 C. Precipitation will be very close to average. An average summer is completely to almost completely dry. The hottest part of this year’s summer is expected to be around mid-August.

    B’medja massima ta’ 29.7 C u medja minima ta’ 20.7 C, Ġunju 2019 kien aktar minn 2 C aktar sħun minn normal sa issa. Dan jaqbeż iż-0.25 C li kien imbassar fil-bidu tax-xahar. L-aktar temperatura għolja sa issa dan ix-xahar laħqet 37 C u kienet imkejjla fid-9 tax-xahar. Dan qabeż il-medja għal dan iż-żmien tas-sena b’10 C. Bl-anqas ta’ 25 C, il-lejl ta’ wara kien l-aktar sħun ta’ dan ix-xahar. Hekk kif wasalna f’nofs ix-xahar, nistgħu nikkonkludu li Ġunju 2019 qed isegwi l-istess sinjali ta’ Ġunju 2012 u Ġunju 2017, sentejn li fihom esperjenzajna sjuf sħan ferm. Sa ħmistax ilu biss, ħafna kienu ħasbu li kienet se tkun sena bla sajf. Kien bir-raġuni wkoll, peress li l-bidu ta’ Ġunju ta’ din is-sena kien mill-aktar instabbli.

    B’differenza lejn kif mudelli tat-temp kienu qed juru ġimgħat ilu, dawk aktar riċenti qed jaqblu li dan is-sajf għandu jkun qieħed aktar sħun minn normal, saħansitra b’aktar minn 1 C. It-total ta’ xita se jkun ħafna qrib il-medja. Jekk inħarsu lejn sajf tipiku Malti, ftit li xejn ikollna xita fih. L-aktar parti taħraq ta’ dan is-sajf għandha tkun lejn nofs ix-xahar ta’ Awwissu.

    End of Month Reports
    June 1, 20190

    Cooler and Wetter in May 2019

    Air Temperature

    Highest Maximum 24°C 11th, 24th, 25th and 29th
    Lowest Maximum 18°C 6th, 7th and 16th
    Highest Minimum 17°C 26th, 28th and 29th
    Lowest Minimum 12°C 3rd, 8th and 17th

     

    Mean Maximum 21.0°C
    Mean Minimum 14.0°C
    Mean 17.5°C

     

    Relative Humidity

    Highest Relative Humidity 73% 2nd and 3rd
    Lowest Relative Humidity 29% 22nd

     

    Mean Relative Humidity 61.0%

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1022.0hPa 30th
    Lowest Atmospheric Pressure 1000.0hPa 4th

     

    Mean Atmospheric Pressure 1014.0hPa

     

    Wind

    Highest Gust 68km/h 6th

     

    Mean Wind Speed 12km/h
    Mean Gust Speed 30km/h
    Mean Wind + Gust Speed 21.5km/h
    Most Frequent Wind Direction Northwest

     

    Precipitation

    Total Rainfall During May 2019 21.1 mm
    Total Rainfall Since Last 01/09 503.7 mm

     

    Highest 24 Hour Total 7.8 mm 3rd

     

    Rain Days 8
    Thunderstorm Days 4
    Hail Days 0

     

    Rainfall Events

    03/05/2019 7.8 mm Showers
    04/05/2019 0.5 mm Thunderstorm
    12/05/2019 2.5 mm Thunderstorm
    13/05/2019 0.3 mm Light Rain
    14/05/2019 2.3 mm Light Rain
    16/05/2019 5.6 mm Thunderstorm
    26/05/2019 1.8 mm Thunderstorm
    30/05/2019 0.3 mm Light Rain

     

    May 2019 Compared to the Climate Means 

      Climate Mean May 2019 Anomaly
    Mean Maximum Temperature 23.9°C 21.0°C -2.9°C
    Mean Minimum Temperature 15.7°C 14.0°C -1.7°C
    Mean Temperature 19.8°C 17.5°C -2.3°C
    Mean Relative Humidity 74% 61% -13%
    Mean Atmospheric Pressure 1015.3hPa 1014.0hPa +1.3hPa
    Mean Wind Speed 17.0 km/h 21.5km/h +4.5km/h
    Most Frequent Wind Direction Northwest Northwest Nil
    Total Rainfall 10.6 mm 21.1 mm +10.5 mm
    Total Rainfall Since Last 01/09 572.3 mm 503.7 mm -68.6 mm
    Total Rain Days 3 5 +2
    Total Thunderstorm Days 1 2 +1
    Total Hail Days 0 0 0


    Cooler and Wetter in May 2019

    May 2019 was rather cool, as below-average temperatures were recorded throughout. The mean maximum temperature of 23.9°C was exceeded on only 4 days out of 31 days. Overall, the air temperature was 2.3°C colder than the norm. Once again, the biggest margin from the mean was registered by the daytime highs. May 2019 was infact one of the coldest ever. Unseasonal anticyclones over Scandinavia persisted throughout the month. This deflected bad weather towards the Mediterranean. This bad weather brought with it frequent blasts of cold air from the north, allowing temperatures to remain colder than average throughout.

    Total rainfall measured at our weather station in Għarb, at 21.1 mm was above the mean for this time of year. The number of days with rain and thunderstorms, at 8 and 4 respectively, were also greater than the norm. This observation is also the result of prevailing anticyclones over Scandinavia, deviating bad weather to the south.

    A number of windy days dotted May. Winds were significantly stronger than the average for May. The wind reached Force 6 or higher on 6 days. This was the consequence of air moving from high pressure over Scandinavia towards successive low pressure systems traversing the Mediterranean. The prevailing wind direction was the Northwest. The strongest wind gust was of 68 km/h, registered on the 6th.

     

    Reports
    May 13, 20190

    Chance of isolated thunderstorm / Ċans ta’ maltempata bir-ragħad iżolata

    A rapidly disentegrating low pressure system will reach the central Mediterranean from over southern Italy. With it is an occluded front. This will be influencing the weather in the Maltese Islands from late on Monday 13/05 till around noon on Tuesday 14/05. Occluded fronts are associated with mature low pressure areas. There are two types of occlusion; warm and cold. In our case, it will be a cold occlusion. In a cold occlusion, an advancing mass of cold air will have caused a mass of warm air to rise completely and be cut-off from the Earth’s surface. When this happens, the warm air is cut-off from surface-based sources of moisture. A variety of weather can be found along occluded fronts, with thunderstorms being a possibility. Their passage is normally associated with the drying of the air mass, and thus, a minimal amount of rainfall.

    A few isolated possibly briefly heavy, thundery and with hail at times may affect parts of the Maltese Islands overnight and in the morning of Tuesday 14/05. Total rainfall is will likely be less than 10 mm, even in the hardest hit areas. Temperatures may dip to below 13 C in areas affected by hail. Real-feels may fall below 10 C. The meteorological situation will improve in the afternoon on Tuesday 14/05, albeit with a Force 4/5 wind from the West Northwest.

    Sistema ta’ pressjoni baxxa li kull ma jmur qed tiddgħajjef se tilħaq iċ-ċentru tal-Mediterran minn fuq l-Italja ta’ isfel. Abbinat magħha se jkun hemm front ta’ okklużjoni. Dan se jkun qed jinfluwenza t-temp tal-Gżejjer Maltin minn tard it-Tnejn 13/05 sa madwar nofsinhar tat-Tlieta 14/05. Front ta’ okklużjoni huwa normalment assoċjat ma’ sistema ta’ pressjoni baxxa matura. Hemm żewġ tipi ta’ front ta’ okklużjoni; kiesaħ u sħun. Fil kas tagħna, se jkun wieħed kiesaħ. Fi front ta’ okklużjoni kiesaħ, massa ta’ arja kiesħa tkun imbuttat massa ta’ arja sħun il-fuq, b’ tali mod li din ta’ l-aħħar tinqata mill-art kumpletament. Meta jiġri dan, l-arja sħuna tinqata minn mas-sors ta’ ilma kumpletament , u b’hekk tibda titlef l-ilma. Front ta’ okklużjoni huwa assoċjat ma’ varjeta ta’ temp, b’maltempati bir-ragħad tkun waħda mill-possibilitajiet. Peress li front ta’ okklużjoni ikun qed jitlef mill-ilma, kapaċi jipproduċu biss xita f’ammonti żgħar.

    Xi ħalbiet iżolati tax-xita possibilment qawwijin, bir-ragħad u silġ għal ftit ħin kultant jistgħu jaffetwaw lil Gżejjer Maltin billejl u filgħodu tat-Tlieta 14/05. It-total ta’ xita probabli mhux se jaqbeż l-10 mm, anke fl-aktar inħawi milquta. It-temperaturi jistgħu jinżlu taħt 13 C fl-inħawi milquta mis-silġ. It-temperatura tkun tinħass daqs li kieku 10 C. Is-sitwazzjoni metejoroloġika se taqleb għal aħjar wara nofsinhar tat-Tlieta 14/05, għalkemm b’riħ Forza 4/5 mill-Punent Majjistru.

    Reports
    May 11, 20190

    Wet and windy for Mothers’ Day / Imxarrab u mirjieħ għal Jum l-Omm

    A cold front associated with a low pressure system over central Italy will be traversing the central Mediterranean on Sunday 12/05. This year’s Mothers’ Day promises to be a wet and windy one. The main influence of this cold front will be a plunge in air temperature. From a 26 C high on Saturday 11/05, it will struggle to reach 21 C on Sunday 12/05. The minimum temperature will dip to 14 C. That is 3 C lower than the average for this time of year. The crossing of this cold front will also mean a strong wind from the West Northwest to Northwest for the Maltese Islands. It will reach Force 5/6 from around noon on Sunday 12/05 onward. Finally, there is also the chance for some isolated showers. Rain will be possible at any time during the day, with the greatest chance being in the morning and early afternoon. It will be mainly light, but could become briefly heavy and thundery from time to time. Monday 13/05 will see similar weather conditions. It will then become mainly sunny, but remain rather windy, from Tuesday 14/05 onward, as the Maltese Islands face an unstable week.

    Front kiesaħ assoċjat ma’ sistema ta’ pressjoni baxxa fuq iċ-ċentru tal-Mediterran mistenni lgħaddi minn fuq iċ-ċentru tal-Mediterran nhar il-Ħadd 12/05. Jum l-Omm jaf ikun wieħed imxarrab u mirjieħ. L-effetti prinċipali ta’ dan il-front kiesaħ hija temperaturi ferm aktar kesħin. Minn l-ogħla ta’ 26 C nhar is-Sibt 11/05, it-temperatura se tbati biex tilħaq 21 C il-Ħadd 12/05. L-anqas temperatura se tkun ta’ 14 C. Dan huwa 3 C anqas mill-medja għal dan iż-żmien tas-sena. Dan il-front kiesaħ se jfisser ukoll riħ qawwi mill-Punent Majjistru għal Majjistral għal-Gżejjer Maltin. Dan se jilħaq Forza5/6 minn madwar nofsinhar tal-Ħadd 12/05 ‘il quddiem. Fl-aħħar nett, se jkun hemm iċ-ċans ta’ ħalbiet iżolati tax-xita. Ix-xita se tkun possibli f’kwalunkwe ħin , biċ-ċans ikun l-ogħla filgħodu u kmieni wara nofsinhar. Din se tkun fil-maġġor parti ħafifa, imma taf issir qawwija u bir-ragħad minn ħin għal ieħor. It-Tnejn 13/05 mistenni jkun ikkaratteriżżat minn temp simili. Minn nhar it-Tlieta 14/05 ‘il quddiem, it-temp se jsir il-biċċa l-kbira xemxi, imma jibqa ferm mirjieħ, hekk kif il-Gżejjer Malti qed jiffaċjaw ġimgħa ta’ temp instabbli.

    End of Month Reports
    May 1, 20190

    Cooler and Drier in April 2019

    Air Temperature

    Highest Maximum 27°C 23rd
    Lowest Maximum 15°C 1st and 2nd
    Highest Minimum 16°C 25th
    Lowest Minimum 10°C 1st and 8th

     

    Mean Maximum 17.0°C
    Mean Minimum 11.8°C
    Mean 13.9°C

     

    Relative Humidity

    Highest Relative Humidity 78% 6th
    Lowest Relative Humidity 24% 23rd

     

    Mean Relative Humidity 72.0% ed-hrvatski.com

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1024.1hPa 19th
    Lowest Atmospheric Pressure 1013.2hPa 21st

     

    Mean Atmospheric Pressure 1019.3hPa

     

    Wind

    Highest Gust 68km/h 19th

     

    Mean Wind Speed 12km/h
    Mean Gust Speed 31km/h
    Mean Wind + Gust Speed 21.5km/h
    Most Frequent Wind Direction Southeast

     

    Precipitation

    Total Rainfall During April 2019 27.5 mm
    Total Rainfall Since Last 01/09 482.6 mm

     

    Highest 24 Hour Total 19.1 mm 5th

     

    Rain Days 5
    Thunderstorm Days 0
    Hail Days 2

     

    Rainfall Events

    04/04/2019 1.8 mm Light Rain
    05/04/2019 19.1 mm Thunderstorm
    07/04/2019 4.3 mm Isolated Showers
    14/04/2019 2.0 mm Isolated Showers
    22/04/2019 0.3 mm Thunderstorm


    April 2019 Compared to the Climate Means     

      Climate Mean April 2019 Anomaly
    Mean Maximum Temperature 19.6°C 17.0°C -2.6°C
    Mean Minimum Temperature 12.5°C 11.8°C -0.7°C
    Mean Temperature 16.2°C 13.9°C -2.3°C
    Mean Relative Humidity 77% 72% -5%
    Mean Atmospheric Pressure 1014.3hPa 1019.3hPa +5.0hPa
    Mean Wind Speed 18.9 km/h 21.3km/h +2.4km/h
    Most Frequent Wind Direction Northwest Southeast 135°
    Total Rainfall 23.2 mm 27.5 mm +4.3 mm
    Total Rainfall Since Last 01/09 561.7 mm 474.2 mm -87.5 mm
    Total Rain Days 6 5 -1
    Total Thunderstorm Days 1 2 +1
    Total Hail Days 1 0 0


    Cooler and Drier in April 2019

    The air was significantly cooler than average over much of last month. Overall, air temperatures were 2.3°C colder than normal. The biggest difference from the average was registered by the daytime temperature (2.6°C cooler than usual). Nights were not as cold (0.7°C cooler than the norm). This could attributed to the fact that April was characterised by several days of overcast skies and airborne fine desert sand. In this case, light from the Sun would be reflected off the clouds and airborne fine desert sand back into space, preventing the air at ground level from heating up. Finally, temperatures returned to normal in the final week of April. The hottest day was the 23rd with a 27°C high. Conversely, the coldest was at 10°C  on the 1st and 8th.

    Total rainfall measured at our weather station in Għarb, at 27.5 mm was below the mean for this time of year. April started off promisingly with regards to precipitation. 25.2 mm (or 91%) of April’s rainfall total fell in the first week of the month. The rest fell in light showers which deposited copious amounts of fine desert sand.

    A number of windy days dotted the month of April. Winds were significantly stronger than the average for April. The wind reached Force 6 or stronger on 10 days. This is the Maltese Islands were caught up between high and low pressure systems several times. The strongest gust was of 68 km/h, registered on the 19th. The prevailing wind direction was from the Southeast. This was the result of successive north African low pressure systems passing by us.

    End of Month Reports
    April 1, 20190

    Cooler Days but Warmer Nights in March 2019

    Air Temperature

    Highest Maximum 22°C 8th, 9th and 18th
    Lowest Maximum 14°C 12th and 27th
    Highest Minimum 14°C 20th
    Lowest Minimum 10°C 4th, 21st, 27th and 28th

     

    Mean Maximum 17.0°C
    Mean Minimum 11.8°C
    Mean 13.9°C

     

    Relative Humidity

    Highest Relative Humidity 75% 6th
    Lowest Relative Humidity 28% 8th

     

    Mean Relative Humidity 64.0%

     

    Atmospheric Pressure

    Highest Atmospheric Pressure 1028.1hPa 10th
    Lowest Atmospheric Pressure 1013.2hPa 21st

     

    Mean Atmospheric Pressure 1019.3hPa

     

    Wind

    Highest Gust 85.0km/h 12th

     

    Mean Wind Speed 12.6km/h
    Mean Gust Speed 29.9km/h
    Mean Wind + Gust Speed 21.3km/h
    Most Frequent Wind Direction Northwest

     

    Precipitation

    Total Rainfall During March 2019 56.8 mm
    Total Rainfall Since Last 01/09 455.1 mm

     

    Highest 24 Hour Total 27.4 mm 21st

     

    Rain Days 6
    Thunderstorm Days 1
    Hail Days 1

     

    Rainfall Events

    02/03/2019 polska-ed.com 0.5 mm Isolated Shower
    06/03/2019 0.5 mm Fog and Dew
    10/03/2019 0.3 mm Fog and Dew
    12/03/2019 0.3 mm Isolated Shower
    15/03/2019 2.0 mm Light Rain
    18/03/2019 0.3 mm Fog and Dew
    21/03/2019 27.4 mm Thunderstorm
    22/03/2019 2.5 mm Light Rain
    24/03/2019 0.3 mm Fog and Dew
    27/03/2019 22.7 mm Steady Rain

     

    March 2019 Compared to the Climate Means

      Climate Mean March 2019 Anomaly
    Mean Maximum Temperature 17.3°C 17.0°C -0.3°C
    Mean Minimum Temperature 10.7°C 11.8°C +1.1°C
    Mean Temperature 14.0°C 14.4°C +0.4°C
    Mean Relative Humidity 79% 64.0% -15.0%
    Mean Atmospheric Pressure 1016.1hPa 1019.3hPa +3.2hPa
    Mean Wind Speed 18.9 km/h 21.3km/h +2.4km/h
    Most Frequent Wind Direction Northwest Northwest 0°
    Total Rainfall 40.7 mm 56.8 mm +16.1 mm
    Total Rainfall Since Last 01/09 538.5 mm 455.1 mm -83.4 mm
    Total Rain Days 9 6 -3
    Total Thunderstorm Days 2 1 -1
    Total Hail Days 1 1 0

     

     Cooler Days but Warmer Nights in March 2019

    Daytime highs last month were colder than normal (by 0.3°C at 17.0°C). Conversely, nighttime lows were warmer than average (by 1.1°C at 11.8°C). Overall, March 2019 was warmer than average by 0.4°C, with a value of 14.4°C. The warmest temperature in March 2019 clocked in at 22°C and was measured on a number of days, mainly in the first half of the month. The low of the month, of 10°C, was measured on three nights towards the end of the month.

    For yet another month, winds were significantly stronger than average. It reached Force 8 on six days. The strongest was recorded at 85.0 km/h (Force 9) on March 13th. Most days were characterised by a Northwest wind. This conforms with the climate mean.

    Total rainfall measured at our weather station in Għarb exceeded the norm for this time of year. With a total of 56.8 mm, March 2019 was wetter than average by 40%. 50.1 mm of this fell during two major rainfall events. These consisted of a thunderstorm on the 21st and periods of steady rain on the 27th. Thunder and hail affected us only during the thunderstorm on the 21st.

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