The German storm has now, as forecasted move south east and is now centered over the Adriatic. Its presentation has the appearance of a storm which is receiving its energy from an Atmospheric River of water.
Here's a 90 hour accumulated forecast for Italy. The storm is continuing to move very slowly.
^^ this is from @NOAA's GFS

Here's the European @ECMWF model version which shows particularly highlevels of rain over the Slovenia, Croatia, & Bosnia & Herzegovina.
Here's a Precipitable Water simulation from the @ECMWF over 240 Hours. The high levels of atmospheric water have fully moved out by Wednesday.
And here is ECMWF's 6-hrly rainfall forecast - over 96 hours.

Note however that forecasting exact rainfall location and intensity over any longer than 24 hours is very tricky. The rainfall expectations here are closely tied to the accuracy of the precipitable water model.

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More from @althecat

18 Jul
This attached thread from this morn looks at Typhoon #INFA ("In-fa" TS09W) which is poised to be extraordinarily disruptive to the 2021 Olympics in Japan.

It has since come clearer what we can expect from a dangerous and unusual weather system developing over the West Pacific. Image
This is the story of three storms rather than one, but IN-FA will play the starring role.

1. TD10W currently menacing Hong Kong
2. "IN-FA" which is technically still TS09W (fmrl. #invest98w)

& a 3rd storm which models forecast TD10W & IN-FA will bring about in 5 days time. Image
Here's the latest satellite imagery of TD10W (left) and #INFA (right) ImageImage
Read 17 tweets
18 Jul
This killer #EuropeBigWet storm is still packing a punch. Here you see it yesterday over Italy and the Balkans.
And here it is today. It still has a clearly defined circulation over the Adriatic Sea.
This shows the jet stream forecast for today which pretty perfectly matches what we are seeing here from the satellite imagery.

But while the circulation is gone the jet remains. This jet looks like it is going to move into the business of delivering moisture to the Middle East.
Read 5 tweets
18 Jul
The presentation of the #ArabianMonsoonBurst has changed dramatically today with the consolidation of activity over the Arabian Peninsula into a single huge storm which is currently moving into the Red Sea over Makkah and Jeddah.

Today's rainfall forecasts follow. Image
The scale of the storm over Islam's holiest city is huge, larger than France. Two more huge storms loom over the greater region tonight. One on the Iranian Gulf coast and another supercell thunderstorm complex over New Delhi/Rajastan, India, the size of the United Kingdom. Image
The last six hours in three animations, first India which is experiencing a massive monsoon day today in the north.

[Here the initial frames show a blank SEA as their was a satellite data outage.]
Read 30 tweets
18 Jul
A Portrait of Earth's Biosphere

This thread provides a tour of the global biosphere in pictorial form.

The animations were acquired from @zoom_earth on July 14th, and take us on a journey beginning in the North East Pacific over the course of a single day.
The first image ^^ is of North West America.

Here we see the South East Pacific
North East Pacific
Read 23 tweets
18 Jul
There has been a sharp increase in discussion of climate change weather extremes in the context of the flood calamity in Western Europe, wildfires in the North West US, and the #ArabianMonsoonBurst

This thread looks at the big picture right now. What's next? Image
The image above from @meteoblue shows most of the Northern Hemisphere & rainfall at the moment. The intense blobs of colour indicate high rainfall from thunderstorms.

What is immediately apparent looking at this is that there is an immediate issue now in the West Pacific. Image
What will soon be Typhoon In-Ha is forecast to make landfall in Taiwan and then stall bringing massive rainfall to the Philippines, China and Taiwan.

There is second tropical storm to the left of what will soon be In-ha which is simultaneously bringing extreme weather to HK. Image
Read 9 tweets
18 Jul
The German and European low country flooding of last week is astonishing and terrifying. This thread compiles youtube videos of the coverage. The death toll is still expected to rise significantly.
The previous video was @Channel4News 16th July report. Here is their 17th July report.
Here is the BBC report from Friday 16th.
Read 8 tweets

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