February 2021... a month of extremes.

🔴 Very warm month especially from China through Central Asia into the Middle East and also parts of Arctic

🔵 Very cold month for much of North America (Alaska to Gulf of Mexico). Also very cold in Russia and NE Europe.
A global perspective.

We often observe extreme patterns when there is polar vortex disruption.

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More from @ScottDuncanWX

2 Mar
⚠️ Sinabung volcano in Indonesia 🇮🇩 has erupted today. Reports of ash up to 16,500 feet.

Via @Jvl52

Sinabung volcano eruption today from space.

🎥 @andrewmiskelly

Another view of the Sinabung volcanic eruption today.

Read 4 tweets
2 Mar
The winter was exceptionally warm for parts of Canada, Greenland and some of the high Arctic. Also very warm Tibet through to Middle East.

The cold beast plagued Russia to give a cold winter here.

This is a summary from December 2020 through February 2021.

THREAD
Meteorologists like to split the year up into 3-month seasonal chunks for statistical purposes. Winter in the Northern Hemisphere is considered Dec, Jan & Feb.

This was December on its own.
This was January on its own. Cold building in Russia, remarkable warmth in Canada and Arctic. North Africa and Tibet notably warm/hot.

Cool Antarctica and Australia.
Read 7 tweets
1 Mar
The polar vortex has been a hot topic lately... How does the polar vortex from last winter compare to this winter?

Last winter: This winter:
Last winter had a strong and stable polar vortex like a robust doughnut, holding cold air in the Arctic regions.

This year was weak and wavy, allowing cold arctic air to spread to lower latitudes.
The jet stream last year was also particularly strong and stable. Aiding the warm, wet and often windy conditions.

Last winter was the warmest winter on record for the Northern Hemisphere .

Read 10 tweets
22 Feb
The winter heat is starting to gather momentum. This is just the beginning with countless records about to fall later this week.

Hamburg, Germany 🇩🇪 just shattered the record for its hottest winter day ever. Average for this time of year is closer to +4°C.
Hamburg was not alone...

A big list of records

Some records getting broken dating back to 1896.

Read 6 tweets
21 Feb
Holy smokes! Beijing, China 🇨🇳 just hit +25.6°C today.

This is a full +5.8° hotter than the record from 1996 and about +20°C warmer than normal for this time of year!

North and South Korea also recorded their hottest February day ever.

This winter heatwave is truly immense.
This is how the temperature compares to normal.

🔴 = warmer than normal
🔵 = colder than normal

Absolutely insane and unheard of to achieve this warmth in February.
A fantastic breakdown of the stats today by @EKMeteo

Read 8 tweets
19 Feb
From Sahara to Scandinavia. We are in for another round of #dust and warmth widely across Europe.

The jet stream will buckle in an ideal fashion, optimising dust transport from the Sahara Desert to Scandinavia this weekend.

THREAD
The #CopernicusAtmosphere Monitoring Service forecast for aerosol optical depth ⬇️⬇️⬇️

@CopernicusEU @CopernicusECMWF
A lot of dust has already pushed out of the Sahara into the western Atlantic. More to come though.
Read 4 tweets

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