caballero reyes
The Living Force
Here in Sonora, Mexico 24 c. Spring time.
Record precipitation and high snow depths
28 March 2023 • by SMHI, Swedish Meteorological and Hydrological Institute
During the last 24 hours, the newly-emerging spring in eastern Svealand was severely attacked by King Bore [Winter King]. Abundant precipitation in the form of snow meant that the snow depth there increased considerably, reaching a maximum of 40 cm in Vattholma in Uppland. In eastern Svealand, as well as locally in other parts of southern Sweden, March 2023 will be locally record wet.
A new daily precipitation record for March was recorded at one station yesterday, 27 March:
Vällnora (Uppland, start year 1971): 22.8 mm. Previous record: 22.5 mm from 1983.
At Sandhamn (Uppland, start year 1965) on Värmdölandet in Uppland, 22.0 mm was indeed recorded yesterday. However, an even greater daily amount of 36.3 mm was recorded there on 9 March this year. The previous March record there was 18.4 mm from 2018. Thus, the two largest daily precipitation amounts for Sandhamn have now been measured in March 2023.
In Vattholma outside Uppsala, 21.3 mm fell. This is the largest daily amount observed in March there since 1959 when 21.7 mm was measured. The station was established in 1905 but digitised data is only available from 1947.
Large snow depths in some parts of Uppland
The largest measured snow depth in eastern Svealand on Tuesday morning 28 March was 40 cm in Vattholma followed by 35 cm in Vällnora and 33 cm in Söderby-Karlsäng northeast of Östhammar, Norrveda on Vätö and Uppsala. However, there were quite a few differences in the measured snow depths. The station Björklinge only 6 km west of Vattholma had "only" 15 cm snow depth, a difference of 25 cm. This is explained by the geographical distribution of the precipitation streams. While Vattholma received 21.3 mm, 'only' 6.5 mm in melted form was recorded in Björklinge.
Similar event in Uppsala in April 1952
There was no question of any snow depth records. However, given that we are now writing the 28th of March, it may be interesting to see what the largest April snow depths have looked like for at least Uppsala where the snow depth measurements have been continuous and for a long time. There we have to go back to 1 April 1985 to find a greater snow depth this late in the season. At that time, Uppsala had 35 cm of snow. Before that, it was in April 1970 when Uppsala's April record of 58 cm was measured. At the end of March 1969, 1966, 1956 and 1951 there were also snow depths greater than today's 33 cm. However, it should be noted that the snow depths for all these years were the result of a long winter.
This year Uppsala went from bare ground on 25 March to 33 cm on 28 March. As far as I can see from the digitised snow depth data, from 1947 onwards, the closest we come to this is 1-2 April 1952. Then Uppsala went from 1 cm snow depth to 29 cm the following day.
Very precipitation-rich month of March in the south
In southern Sweden, March 2023 will be the wettest month on record. Here are some stations in Uppland that provisionally broke their old March records.
• Sandhamn (Uppland,, start year 1965): 88.2 mm. Previous record 68.7 mm from 1978.
• Norrveda (Uppland, start year 1936): 109.3 mm. Previous record 94.0 mm from 1937.
• Vällnora (Uppland, start year 1971): 87.0 mm. Previous record 68.2 mm from 2006.
As more stations may break their old March records, these will be reported in a separate blog post in the coming days. More precipitation is expected during the last days of the month in southern Sweden.
Translated with DeepL
Stockholm and Uppsala's wettest March in over 110 years
In Stockholm, this year's March 2023 has been unusually wet. You have to go back to 1909 to find a wetter March. Then 98.5 mm fell at Observatory Hill in Stockholm. Apart from March 1909, only March 1896 (79.0 mm) and 1898 (75.5 mm) had more precipitation than this year's edition. So far this year, there has been 71.9 mm. It will probably be a disappointing fourth place for Stockholm as it does not look like any more precipitation will fall there in the coming days. Precipitation measurements in Stockholm began in 1786.
SMHI.se
More than 460,000 Hydro-Quebec customers remain in the dark after a fierce ice storm knocked out power across much of the province on Wednesday.
Montreal remains one of the hardest-hit regions, with over 260,000 customers affected as of around 4 p.m. That number is roughly 52,000 in the neighbouring northern municipality of Laval.
During a Friday morning news conference, Hydro-Quebec officials said power has been restored to over 500,000 of its users. The goal is to get 800,000 customers back on the grid by the end of the day Friday.
- SEE THE MAP: Real-time Hydro-Quebec outages by region
COMPLETE ICE STORM COVERAGE
Around 1,400 Hydro workers were deployed Friday to speed up repair efforts, up from the roughly 1,000 workers sent out Thursday. Officials said 70 km/h winds could impact Friday's work and possibly cause additional outages.
- Montreal's overnight emergency shelters to remain open as thousands remain without power
- Power outage: At least 82 people assessed for carbon monoxide poisoning
- What to do after home or car damage following the Montreal ice storm
- 'We have to be realistic': Quebec premier says burying hydro lines underground too expensive
- Food safety during a power outage: what to keep, what to throw away
- In pictures: Major snow, ice storm rips through five provinces
"We're not expecting a huge number of new outages, maybe a minor amount," said Maxime Nadeau, director of energy system control at Hydro-Quebec, explaining that tree branches disturbed by the storm could detach because of winds.
Some customers will remain without electricity into Sunday and possibly even Monday, although Hydro Quebec did not specify the regions where this is expected.
City workers clears fallen branches Thursday, April 6, 2023 after yesterday’s ice storm which left over a million customers without power in Montreal.THE CANADIAN PRESS/Ryan Remiorz
Over 1.1 million lost power at the height of the outage following Wednesday's ice storm, which coated swaths of Quebec in a layer of ice, toppling trees that crushed parked cars and damaged power lines.
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