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Alastair Thompson Profile picture
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30 Apr, 5 tweets, 2 min read
Good Morning....
Tis frosty and color here 2 degrees on the final day of Spring.
It’s extraordinary, albeit no longer surprising, that there is not a single con-trail in the sky these days.

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More from @althecat

Alastair Thompson Profile picture
1 May
There is something glorious about the images that @zoom_earth captures. I especially like the large symmetrical and fairly stationary area of cloud in the North Atlantic in this image.

Today's May 1sy Forecasts for #Ethiopia and #MiddleEast rainfall follow. Image
The main action today was in Europe where the strengthening #WestAfricaMonsoon #WMA has today had a spectacular impact on European Weather.

A detailed thread covering those events can be found here.
Today's North African long range (12 day) rain forecast is taken from the Korean KMA model as it looks to be a lot closer to what we are seeing in the skies today. Image
Read 5 tweets
Alastair Thompson Profile picture
1 May
It appears that #ClimateChange is giving Western Europe a #MayDay wake up call. #WestAfricaWaterPlume
I have been tracking the cause of the suddenly extreme weather which is currently underway for past month. The immediate cause is described in this thread

There was a precursor event from April 17-19.

This one is a lot bigger.
And it is far from over. There is at least three more days of incoming #WestAfricaWaterPlume
Read 11 tweets
Alastair Thompson Profile picture
1 May
The transformation of #WestAfricanPlume's presentation overnight is extraordinary. It's line has moved 1000kms east. It's still running as hot as last night.

A rough estimate of the speed of the cloud movement last night put it an over 220 kms per hour. Image
To comprehend the scale of this thing a series of three animations follows.
Africa and Western Europe...
Read 27 tweets
Alastair Thompson Profile picture
1 May
This #WestAfricaWaterPlume thingamy is ruining May in Europe. /1 ImageImageImageImage
The wet Atlantic air is set to make its way up into the arctic and settle a low pressure system over Scandinavia.

Together these two factors result in a continuous flow of cold air from the arctic over Scandinavia and North Sea and the UK.
I spent May 2017 in Glasgow and it was glorious. By the end we were getting 29 degree days and everyone was out in the Botanic Gardens with shirts off.

And in Geneva the past two years it’s been a bit thunderstormy, but only in the afternoon. ImageImageImageImage
Read 4 tweets
Alastair Thompson Profile picture
30 Apr
Today's #ArabianStorms went in a different direction during the day, but ended up in a familiar place in the end.

Today's #MiddleEast and #Ethiopia #HornOfAfrica rain forecasts follow in the thread below.
In the animation above you can see a flow of clouds from Sudan to Oman. This flow actually originates to the South West in the Central African Republic. Here you see the CAR to Khartoum leg of the journey.
Over the day this stream of moisture intensified powering storms in Oman, which then split into two streams, one heading north over Iran and one to the East to India.
Read 6 tweets
Alastair Thompson Profile picture
30 Apr
In the world of Africa/Europe/MiddleEast weather today has been quite spectacular, in a new and revealing way. And the star of the show has been the #WestAfricaWaterPlume.

See also.. a thread from this morning....
.. and for a full backgrounder this thread from April 27th.
The plume has now stolen the European stage entering stage left and heading directly towards Moscow. The precipitation animation below is from @meteoblue. Rain reports are not 100% accurate as they are satellite & not radar driven.

But as for #DesertRain?
There has been a lot.
Read 11 tweets

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