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Status:Ongoing analysis Material from: Linus

Discussed in the following Daily reports:

1. Impact

On 9 November Stockholm, Sweden was hit by a severe blizzard. The city got around 40 cm of snow. The snow accumulation over 2 days was the largest since at least 1950 for Stockholm (all winter months included).

2. Description of the event

The plots below show the analyses of z500 and t850 for 6 November to 10 November.

Forecast User > 201611 - Snowfall - Stockholm > z500_0612.png

The plots below shows 12-hour forecasts of MSLP and precipitation from the same period as the plots above.

Forecast User > 201611 - Snowfall - Stockholm > mslp_0612.png

The plots below shows the evolution of the snow depth in Sweden from 8 November 06z to 10 November 06z.

Forecast User > 201611 - Snowfall - Stockholm > snowdepth_1008.png

The plot below shows an example of radar image during the snowfall (9 Nov 10z)

Forecast User > 201611 - Snowfall - Stockholm > radar_10z.png

3. Predictability

3.1 Data assimilation

3.2 HRES

3.3 ENS

c

Forecast User > 201611 - Snowfall - Stockholm > efi__tue_sn_1.png

EFI for snowfall 9 November

Forecast User > 201611 - Snowfall - Stockholm > efi__wed_sn_1.png

3.4 Monthly forecasts

3.5 Comparison with other centres

4. Experience from general performance/other cases

5. Good and bad aspects of the forecasts for the event

6. Additional material