European Storm & Convective Discussion

[matty40s]

Wow..

 

[matty40s]

Meanwhile in Switzerland...

This normally looks like this...

[Markus03]

Huge amount of rain in the Baltics and Finland. There could be over 50mm of rain in 24 hours. This low pressure is strong especially because of the hot air in the East. This low pressure is new as it was born just yesterday around Poland / Lithuania area. Tonight winds could be over 30 m/s. There shouldn't be lightning but there are warnings because of the wind.

[Markus03]

Low pressure currently. 

[matty40s]

 

[matty40s]

Normally looks like ...

 

Edited August 28, 2023 by matty40s

[carinthian]

The crazy summer weather continues in Central Europe today. Flash Floods in Western Austria. Intense heat this afternoon across much of Hungary with temps close to 40c in some locations. A welcome cool down this weekend across the Alps after weeks of record heat on the glaciers. In fact some welcome late summer snow on the high glaciers of Switzerland at the moment. Picture above Zermatt today.

C

[matty40s]

Meanwhile, in Croatia..

 

Edited August 28, 2023 by matty40s

[Metwatch]

54 minutes ago, matty40s said:

Meanwhile, in Croatia..

 

Impressive satellite loop of them again today, soon heading into Bosnia after reaching southern Croatia.

[matty40s]

 

[Eagle Eye]

At what point does it become a Derecho.

Edited August 28, 2023 by Eagle Eye

[matty40s]

1 hour ago, Eagle Eye said:

At what point does it become a Derecho.

At the moment, it's still just a massive weather front being pushed by cold air from the back, and moving steadily forward. The jetstream is driving it from above.

The downbursts and associated water spouts and tornadoes are fairly localised events across the front, being generated by local topography and upper level convergences. 

 

Edited August 28, 2023 by matty40s

[matty40s]

 

[carinthian]

A pilot due to land at Majorca took this amazing shot of the storm cloud engulfing the island yesterday.

C

[Allseasons-Si]

3 minutes ago, carinthian said:

A pilot due to land at Majorca took this amazing shot of the storm cloud engulfing the island yesterday.

C

WOW!!!

 

[carinthian]

23 minutes ago, carinthian said:

A pilot due to land at Majorca took this amazing shot of the storm cloud engulfing the island yesterday.

C

If memory serves me right the landing on this shot will be on a SWly approach just to the right of the small Park Island bottom left and close to Bay of Palma. So safest approach to avoid that monster !

C

[matty40s]

 

[matty40s]

 

[carinthian]

The aftermath of Sundays storm. Pictures taken near Rauris showing the destructive nature of the heavy rain that caused the landslides and washing away of many trees.

C

[chapmanslade]

19 hours ago, carinthian said:

A pilot due to land at Majorca took this amazing shot of the storm cloud engulfing the island yesterday.

C

That storm caused lots of problems. @TheFlyingDuck

[TheFlyingDuck]

On 29/08/2023 at 14:25, carinthian said:

A pilot due to land at Majorca took this amazing shot of the storm cloud engulfing the island yesterday.

C

This photo is either incorrectly dated or was from later in the afternoon because the cells that affected the island during the early part of the day (when we were attempting to land) were far more disorganised and embedded - a day for studying the onboard weather radar as the mk1 eyeball was redundant.

We ended up having to bravely run away from the hold as a nasty section of one of the cells passed through, by which point the airport was shut anyway. We were one of 8 aircraft that diverted to VLC, I believe in total it was nearly 20 aircraft which were affected by the morning closure. 

Indeed the approach is down the 'right side' of the cell as you look at the photo, its impossible to recommend an approach direction (you wouldn't even attempt one anyway) with a cell positioned so closely over the field. Inflow/Outflow of the cell will be constantly changing the wind direction and strength - the surface wind can also be a complete contrast to that of the steering upper winds.

Last year a cell decided to park itself at the far end of the runway in Perugia. We held for a while with the steering winds were giving us around 25kts tailwind on the approach, and the surface wind was outside limits with a 15kts tailwind (likely the storm sucking in as it built). The 737 usually feels very sporty on the brakes, however even a very light tailwind very quickly makes it feel like steel/carbon brakes have been replaced with bottle tops. 

All of a sudden ATC informed us of a full 180 degree switch to the surface wind, as the cell collapsed and rained out on the 'back-side'. The result was a 25kts tailwind on the initial part of the approach which would switch to a 15kts headwind at some point. We gave up on the approach in the end, a 40kts change in wind speed is never likely to lead to stable approach criteria. 

[carinthian]

18 minutes ago, TheFlyingDuck said:

This photo is either incorrectly dated or was from later in the afternoon because the cells that affected the island during the early part of the day (when we were attempting to land) were far more disorganised and embedded - a day for studying the onboard weather radar as the mk1 eyeball was redundant.

We ended up having to bravely run away from the hold as a nasty section of one of the cells passed through, by which point the airport was shut anyway. We were one of 8 aircraft that diverted to VLC, I believe in total it was nearly 20 aircraft which were affected by the morning closure. 

Indeed the approach is down the 'right side' of the cell as you look at the photo, its impossible to recommend an approach direction (you wouldn't even attempt one anyway) with a cell positioned so closely over the field. Inflow/Outflow of the cell will be constantly changing the wind direction and strength - the surface wind can also be a complete contrast to that of the steering upper winds.

Last year a cell decided to park itself at the far end of the runway in Perugia. We held for a while with the steering winds were giving us around 25kts tailwind on the approach, and the surface wind was outside limits with a 15kts tailwind (likely the storm sucking in as it built). The 737 usually feels very sporty on the brakes, however even a very light tailwind very quickly makes it feel like steel/carbon brakes have been replaced with bottle tops. 

All of a sudden ATC informed us of a full 180 degree switch to the surface wind, as the cell collapsed and rained out on the 'back-side'. The result was a 25kts tailwind on the initial part of the approach which would switch to a 15kts headwind at some point. We gave up on the approach in the end, a 40kts change in wind speed is never likely to lead to stable approach criteria. 

Thanks for that insight. Great input. Hope to see you posting on here more often !

C

[Metwatch]

Last night near Barcelona, what a photo! 

 

[Sprites]

Rewind to 23.32 

 

 

Edited August 30, 2023 by Sprites

[carinthian]

On 27/08/2023 at 21:18, carinthian said:

Saturdays " close encounter "  super cell over SE Bavaria last evening.

C

Here is another picture of the same supercell as it moved out of Bavaria into Austria ( picture taken to the NE of Salzburg )