Friday, 4 April 2014

Final Update, Summary and Images: Cold Front moving in over the Western/Southern Cape (Period: 1 - 4 April 2014)

This cold front is now active in the South Indian Ocean.  However cold air is still present over parts of the Southern and Eastern Cape. Another 1mm of rain was recorded at  Heiderand, Mossel Bay bringing the total rainfall for the above period to 27 mm. This weather system resulted in moderate to heavy rain, gale force wind, snowfall, hail, rapid drop in temperature and structural damage.  I will summarize a few "interesting facts" regarding this  system. I will not go into detail as this blog contains most if not all of  the information.

1 April 2014:

Heavy rain and flooding reported in parts of Cape Town. (Note: Click on images for larger view.)

Apr 1
Cape Town - Ladies Mile Road, deep flooding on the M3 Highway bridge

Cape Town - N1 Inbound (Update), Accident and Flooding before M5 Koeberg Interchange - heavy queue from Plattekloof Road

Apr 1
Cape Town - M3 Inbound, near Paradise Motors - left lane closed - expect delays



2 April 2014:

No warning was issued by the SA Weather Service on the 2 April 2014 regarding this event and this is actually the day when this system turned into an intense severe weather event.


What looked like a ordinary cold front changed into a intense system on the 2 April 2014 bringing with it cold weather, heavy rain, flooding, snowfall, hail, thunderstorms, gale force wind and severe weather.



An intense thunderstorm just missed Mossel Bay on the 2 April 2014 after moving offshore. We were lucky that this storm moved offshore.  I have not seen such a storm in the 20 years that I have been living in Mossel Bay.



Gale force wind cause damage to infrastructure in Darling, Western Cape. Roofs were blown off and trees were uprooted. John  Duckitt describe it as a "tornado" but looking at the damage it would appear to have been a straight line wind or possible up-draught.  Images courtecy John Duckitt (Facebook)














Snowreport.co.za report snowfall on the Matroosberg Mountains near Ceres. This is unusual for this time of year however snowfall has been reported in December in the past.  Early start to winter?


Other reports of snowfall:

Apr 2
The first snow of the season has fallen! Come find out where at SnowReport! :D

23h
Yay! The first SNOW of the season happened yesterday in Matroosberg Western Cape! :D

Proof of snow! :) ": sneeu op Ceres se Matroosberg.

we also got a bit of snow in Worcester 


We have had snow on the mountains in Worcester in April! The skies have cleared and the stars are sparkling in the crisp cold air!

Hail fell in parts of East London on the 2 April 2014:


Hail in East Londen tonight

Petro Engelbrecht I lived in East London for 35 years and never seen hail in EL. OMW never to old to see something like that

Hail was also observed in the Houtbay area.

3 April 2014:

It is still raining over large parts of the Southern Cape and Eastern Cape this morning. Further rain is expected this morning in these parts of the country.  

Rainfall recorded for this event ranged from 10 - 60 mm.

This custom GFS chart shows disturbance in the 500hPa temperature at 06Z on Wed 2nd (about 10C below the seasonal average) and how intense the cold snap was. (Stormchasing SA)
4 April 2014:

1mm or rain recorded at Heiderand, Mossel Bay ( Period 3 - 4 April 08h00 - 08h00 SAST)

Summary:  Even though no warnings of heavy rain, gale force wind and severe thunderstorms were not issued we should never underestimate a weather system.  We must monitor any approaching or developing weather system. This past system is an example of how quickly the weather can change from ordinary to severe.  Early warnings and press releases are crucial and once the "alarm" has been raised, we need to be prepared and ready for any eventuality.

It is my opinion that the intensity of this past weather event was under estimated by many.  This event should be a wake-up call to all of us.

I would like to thank all the members of public, private sector, radio amateurs, the media and real time observers  to many to mention here, who send photos, information and reports about this event. We must keep the public informed of what is happening out there.  I am looking forward to your continued support. With your help we can render a free service to the public and hopefully contribute to save and better the lives of those in need.

Johan Terblanche
Founder: MSBWX, SAWDOS, SAWDIS
Mossel Bay
4 April 2014