Stockholm, Sweden
18-19 March 2022
But first regarding the air quality over Germany 25 Feb 2022, I really don't know what those supposedly high levels of SO2 (via Windy.com) was about. I didn't connect this before; because on the same day, there was a strong inflow of coolish air, creating numerous thunderstorms over the middle western part of Germany - which
Mari mentioned on the same day 25 Feb 2022 in her entry
The last few days is more or less cold here in NRW, Germany, between 5-10 degrees, with frozen rain falling.
So, a mix of rain and then it freezes in the air to small balls of hail.
Now is 5 degrees Celsius, with hail - AND THUNDERSTORMS!!!!!!!
I can't believe it! Thunderstorm and hail in February in Germany at 5 degrees!!!
So, my theory of a possible inversion keeping SO2 "locked in" at the lower atmosphere, bursted into nothingness, simply because there were no such conditions over Germany on that day. The atmosphere was well stirred, after a passage of a cold front, belonging to a low pressure area, which over Stockholm on 24 Feb caused plenty of snowfall (which got refrozen, creating ice everywhere at first, whose patches we still can spot on the ground on 19 March, albeit very little by now).
Interesting phenomena - Peculiar "Milky high Clouds"
Fast forward. The recent low pressure area over Spain, created some really interesting cloud appereances in satellite charts. I have often been fascinating by the visual appearance - which seem to occur 1-2 times every year, often in spring - and I have no clue why that is: They are
very dense high clouds, which look like a sea of milk, standing out extra bright in satellite images. Normally you see Cirrus clouds (in IR images) more like large feathery, fibrous patches with details, surrounding low pressure areas, especially combined with a warm front (like in the first image from 14 March 2022, 15.00 UTC)
But then they turn very different from 16 March 2022 and onwards; totally washed/white-out, without any details, even stretching out all the way up to the extreme north of Norway, Finland and Sweden.
I did notice them over Stockholm when they arrived in the west - turning the blue sky from super sunny - into something monotonous "foggy" gray shortly after.
More sunshine 
over Stockholm
The weather up here seem to reach a culmination in the upcoming days, with very mild temperatures (
13°C / 55.4°F), yet still frosty nights (except when the aforementioned "milky clouds" covered our sky, giving off a few drops of rain, while night felt unusual mild at around 4°C/ 39°F.
Right now
19 Mar 2022, 03:30
The skies have once again cleared up and it is cold.
-4.5°C / 23.9°F in Stockholm-Tullinge, one of those typical "frost-holes" located in the outer suburbs. The City itself reports +1.3° / 34.5°F at 03:00
0% precipitation
Since 1 March, Stockholm have had 0% measurable precipitation. (Actually nothing has come down since 25 Feb 2022 in Stockholm) With all the old leafs and grass being super dry, a risk/warning for grass fires have been issued. (We get that every time in spring)
I used SMHI's charts, in order to illustrate a chart in which you can see daily precipitation charts for Sweden since 24 Feb 2022.
It looks pretty empty.
and then continue to hover slightly around the freezing point. Perhaps that isn’t so strange, given how early into spring we are located; the month of march can be quite wintry up here, still.
