As promised a couple photos from the rain & hail event in Stockholm Snösätra / Rågsved, Saturday, 12 Jun 2021 - which locally appeared to have it's peak over the area where I live (including subway station Högdalen) - while other (weather) stations received much less rain. Still... 1" isn't really that much, even if it came down within 15-20 minutes...
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Subway station Högdalen station is still closed; lots of people and emergency vehicles ....
Analysis of rare rain Event
Remember when I wrote about a "sinkhole" / flooding event at the
subway station of Stockholm - Högdalen (south of Stockholm) last Saturday 12 June 2021 ? Located from my balcony only 0.8 km (0.5 miles) away... While the official meteorological weather observation network grid in no way captured this event, thus registering a mere 12 mm rain (0.47 inch) at the 7 km (4.4 miles) distant Tullinge station. And no other station data reported more. (I do not have full access to all weather info that is registered, I may add)
82 mm (3.22') rain within 20 minutes !
Accidentally I just bumped into a mainstream article at (DN.se) an hour ago - which wrote about some people got their basements / ground floors flooded - in this very area. A relatively close neighborhood called
Gubbängen, around 3 km from my place and 2.5 km from Högdalen, got a lot more: 48.5 mm (1.89 inch) - but
Högdalen was pretty extreme with
81.9 mm (3.23 inch) of rain within 20 minutes.
That a switch !
Far off form the officially reported 12 mm precipitation...
"2 meter deep water"
82 mm / 3.23 inch in 20 minutes, does explain why there was problems at the next subway station. Högdalen is an area which lies lower than it's surrounding.
It is a valley. According to one of the staff members selling tickets - the water stood "2 meter" deep
DN.se media also wrote, that this was "one of the most extreme events recorded in Stockholm" (and did not miss the opportunity to kick off another fear mongering climate-change article on top...
)
Torrential Rain events in the past (in Stockholm)
I have experienced 2 events with torrential rain over Stockholm during the 90s (Summer 1992 +
Aug 1994) and I am sure there are a couple more event candidates, I am not aware of, or haven't written down nor tried to analyze.
Anyway - the events from 1992+94 both dumped 80-100 mm (3.1-3.9 inch) rain within a short time. I lived right next to the spherical Globen Area - at Nynäsvägen Highway - where the local street goes below the highway - and got flooded because of the silly low lying area at the street crossing - with the water standing 25-50 cm deep. Both times I went out (afterwards), to document it; and one time I went into the water, in order to help a car that got stuck. My new leather shoes - oh well - they went down the drain of course. The people never thanked for the help, which was a bit weird. In the photo below, after the car event, the water had already started to recede. (It's a longtime exposure photo).
Rare - yet it does happen sometimes
So. 80-100 mm rain events over Stockholm are pretty rare - but they do happen from time to time - and yes, they can and do create problems of course.
The most extreme rain event ever (in Sweden)
was a highly unusual one: Creating a "cataclysm" and reshaping the local mountain area and forest. The so called
>
Fulufjället Rain catastrophe in the night of
30-31 Aug 1997 - dumped a whopping
400 mm (15.8 inch) rain within a short time, leading to a violent flash flood - exceeding anything ever recorded in Sweden by a large margin. It pulled down everything in it's path.
The SMHI Meteorological Institute, analyzed this event deeply, the local country government of Dalarna
even sells book about it - which I bought - to read in detail the local witnesses who told their stories how the extreme weather unfolded, plus all the analysis that was done in the area later. Altogether revealing that an unparalleled event had taken place. (It took a while for people to realize that, because it happened in an area where not many people live) We never thought that such an extreme event could happen in our nordic climate. Albeit I have to add, that our weather station grid in Sweden doesn't really capture large events very well - compared to the 10x denser synoptic weather station grid over Central Europe.
Now I have gone far off that 'little' Högdalen event from last weekend. I hope I didn't bore you with too many details. To be honest, I absolutely love weather in so many ways, always attentive and with my head looking into the sky, observing. Getting excited. And sometimes, I get carried away when I write or talk about it.
Ask my husband...