Mika Rantanenさんのイラストまとめ

It's not often you see T850 < -18°C (Arctic airmass) in Finland in the end of April. Pretty chilly days expected in Lapland!

Comparison of the situations using @burgwx percentile products: https://t.co/V1axyxromJ

The next 7-10 days looks almost completely dry in Finland as the high pressure strengthens over the Baltic region.

The atmosphere trying its best to compensate for the record-wet February.

Classic omega-shaped blocking seems increasingly likely next week and beyond.

This would mean even more this kind of beautiful and sunny late winter / early spring days as now. ☀️

Visualisation of the climatological longest continuous period of snow cover, based on the 1991-2020 average.

It's been relatively snow-rich winter in Finland.

Typically, the longest continuous snow cover lasts ~100 days in southern Finland, but unfortunately the rate at which it has decreased is one of the fastest of the whole northern hemisphere.

Widespread warmth relative to long-term averages expected in northern Eurasia.

This is fairly typical pattern following the strong polar vortex events, as shown by the composite charts of Tripathi et al. (2015): https://t.co/vFTCTKKEFf

@JaanaPrada @MattiHuu_YLE @lang_ilona Jep, varmaankin näin. Englanninkielinen nimitys Sting jet juontaa juurensa skorpionin hännästä, mitä myrskyn ulkomuoto muistuttaa.

While #StormEunice will be exceptionally powerful, its evolution is classic.

Today's GFS 00z analysis shows the precursor, a deep mid-latitude trough over the North Atlantic.

Cyclonic vorticity advection ahead of the trough forces ascent and the formation of a surface cyclone.

Friday afternoon in the UK looks bad as #StormEunice crosses over.

Wind gusts widely over 30 m/s, during Friday rush hour and in the most populated area of the country.