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28 Apr, 4 tweets, 2 min read
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More from @althecat

Alastair Thompson Profile picture
28 Apr
A high resolution taken today by the NASA Modis satellite of the #NileBasin and the #MiddleEast is below.

The day started with storms in the East of the #HornOfAfrica #Yemen and the #KSA and got very busy over the day.

28 April Rain forecasts follow: Image
This first animation shows the beginning of a plume of water coming across the Sahara from the Atlantic. Forecasts indicate water from this plume will arrive in the #MiddleEast and #HoA in 10 days time.
This animation shows the West African Monsoon and the plume of précipitable water making its away across over the Sahara over the coming week.
Read 14 tweets
Alastair Thompson Profile picture
28 Apr
Dawn breaks on the Middle East and Horn of Africa on 28 April with numerous active storms in play.

#ArabianStorms #Ethiopia
Afternoon update 2.45pm: Both #KSA storms have expanded and we now have significant #ArabianStorms in Oman and the #UAE.

Meanwhile in the #Horn of Africa #Ethiopia rainfall to feed the Nile is getting underway, and storms are sparking up along the #Somaliland coast.
Read 5 tweets
Alastair Thompson Profile picture
27 Apr
A major West African Monsoon (WMA) Sahara water transit event has just started. [See animation below).

This thread contains 10 day ECMWF, CMC & ACCESS-G model forecasts of its trajectory & impact on Europe.

The quoted thread addresses #ClimateChange implications.
Here you see the beginning of this event. It is much larger than earlier iterations of the same phenomena. These streams of air-born water are roughly 4000 kms long.
This tweet and the next three contain 10-day forecasts of the trajectory of this hydrological atmospheric phenomena. They forecast precipitable water, the quantity of water which is held in the atmosphere measured in inches.

The first one is from the Euro ECMWF model.
Read 19 tweets
Alastair Thompson Profile picture
27 Apr
An image of thunderstorm activity in the Ethiopian #Abbay #BlueNile basin this afternoon, also showing significant rains South #Yemen and over most of #Somalia.

Todays, 27th April, accumulated rain forecasts for the #MiddleEast & #HornOfAfrica follow in the thread below.
#ArabianStorms activity was boosted today by moisture flowing from the #Ethiopian monsoon rains in the Ethiopian Highlands, the watershed of the #Abbay #BlueNile catchment.

Below you see a 10-day GFS forecast of accumulated rain over North Africa.
This animation shows the flows of moisture from this morning across the Red Sea. A process which is called the "Southern Gate" by Saudi weather entusiasts. #ArabianStorms #Abbay #BlueNile #GERD
Read 14 tweets
Alastair Thompson Profile picture
27 Apr
Two views of the intense rain activity across the Middle East and East Africa today from Iran to Uganda.
See also an earlier thread here about rain reaching Mecca.
And another thread from this morning, as the first storm sparked up over the Yemen/Saudi border.
Read 4 tweets
Alastair Thompson Profile picture
27 Apr
Today is shaping up to be a huge day for thunderstorms across the Arabian Peninsula, #NileBasin and Horn of Africa.

#KSA #SaudiArabia #Yemen #Oman #Iraq #Kuwait

#Ethiopia #Sudan #Eritrea #Somalia #SouthSudan #Uganda

#ArabianStorms #DesertRain
Live weather radar of #ArabianStorms across The Arabian Peninsula. /2
Inside the Grand Mosque in Makkah Muslim pilgrims and the @HolyKaaba. /3
Read 9 tweets

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