Upper Air

Lerwick ascent

It’s no wonder that we are seeing snow showers in May across the north of Scotland after looking at this mornings 11 UTC ascent from Lerwick. The 1000-500 hPa thickness at that time was just 517.5 …

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Upper vortex

There is an upper trough that’s pushing up across the Midlands at the moment, that’s spinning this interesting vortex of rain northwestward. It’s obviously now a relaxing feature, and it’s not really visible as a cut-off …

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Showers in north as air mass cools

After finally seeing the back of that old cold front I never expected to see showers following on so quickly behind during this afternoon.

Leaving on a jet stream

Another 228 mph jet stream exactly a week after the last one.

200 knot jet

A more detailed look at the midnight ascent from Yarmouth Nova Scotia where the wind was blowing 201 knots (231 mph) at 250 hPa.

Lee waves

Something of interest even on a cloudy day.

Jetstream shield

I don’t know the exact technical term for this ‘shield’ of cloud is, other than calling it jet stream cirrus but I know its a harbinger of rapid development. I quite like shield of cloud that I’ve coined, who knows perhaps it’ll catch on.

The fly in the ointment

In the shape of an upper cold pool off the Brest peninsula maybe.

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