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22 Jun, 5 tweets, 2 min read
Historic heat in the east and unseasonably cool in the west.

Europe has been split over the summer solstice, with enormous thunderstorms acting as the boundary between hot and cold.
A mesmerising meridional jet stream helps explain why the west-east contrasts exists.

Parts of Scotland had a frost last night while Finland nearly broke its all-time June heat record today.
Which side have you been on over the last few days?

Hot?
Cold?
Thundery?

GIF answers definitely accepted.

I will start...

London ⬇️
It was the coldest June night in the UK since 1981.

Frost in Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on the solstice night, very impressive given how little darkness there is that far north.

Meanwhile in Finland 🇫🇮

So close to the June national month heat record.

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More from @ScottDuncanWX

Scott Duncan Profile picture
21 Jun
The Arctic heatwave ongoing in Siberia is contributing to continued record-low sea ice extent in the Laptev Sea. It reached a staggering +31.4°C (88.5°F) at 73 degrees north.

NASA satellite imagery just in captures the break-up in exceptional detail.

THREAD ImageImage
This is the Laptev Sea ice extent up to 20 June 2021.

2020 was by far the most extreme melt season in the area. But this year continues to break that record comfortably. ImageImage
This is the weather observations from earlier today in the area.

For those interested, you can access these maps at: ogimet.com/cgi-bin/ogimet… ImageImage
Read 7 tweets
Scott Duncan Profile picture
17 Jun
Heatwaves are hitting headlines all across the Northern Hemisphere right now but parts of the Arctic are about to get pummelled by ferocious heat.

This will accelerate ice melt in places already at record low levels.

THREAD
One of the places getting hit the hardest is around the Laptev Sea (north of Russia).

Air temperatures around the fringes of the Arctic sheets are expected to approach +30°C for consecutive days.

Note the open water already. This will allow for heat to become stored by the sea.
In the past, the Laptev Sea would be completely covered or mostly covered even towards the end of melt season.

This year has entered uncharted territory and this upcoming heatwave is likely to take the extreme further into the record books.

Read 7 tweets
Scott Duncan Profile picture
16 Jun
Oman 🇴🇲 just recorded its hottest day in history.

Temperatures soared to +51.6°C (124.9°F). This is +0.8°C above the old all-time record for the country.

Numerous intense heatwaves unfolding across the Northern Hemisphere right now.
H/t @extremetemps who has been following the heatwave very closely. The previous record was tied on multiple dates.

Now we have a clear national record.

Interactive observations available on OGIMET: ogimet.com/cgi-bin/ogimet… ImageImage
Read 4 tweets
Scott Duncan Profile picture
14 Jun
Dude, where's my car? 🤔

A car dramatically disappears into the ground in Mumbai's Ghatkopar 🇮🇳 after heavy rainfall.

A whole new meaning to underground parking.

Hats off to @trevorjdunn for that witty response.
The fact that the car manages to disappear entirely is actually terrifying.
Read 5 tweets
Scott Duncan Profile picture
13 Jun
The two hottest Mays *on record* for Russia 🇷🇺 have occurred in the last two years.

Records go back to 1891. This is mind-blowing.

May 2021 was 2nd hottest behind 2020.

2020 2021
The temperature change in Russia over the last couple of centuries is staggering. Data via @BerkeleyEarth.

May 2020 and May 2021 also attached (global view) for comparison with data from @CopernicusEU
Thanks for the heads up @EKMeteo & @extremetemps

Read 4 tweets
Scott Duncan Profile picture
11 Jun
Antarctica is ridiculously cold right now.

It is deep winter down there with the relentless night. But it is significantly colder than normal.

It is so cold, it is having an impact on the global temperature anomaly.

THREAD
A lot of heat in Northern Hemisphere across many continents over the coming days but Antarctica sticks out like a sore thumb.

Map via @khaustein
This is the jet stream. The fast river of winds encircles the deep cold. Mesmerising right?

But right now, we have a strong jet and polar vortex locking the extreme cold over the ice sheets.
Read 10 tweets

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