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 Status:Ongoing analysis Material from: Linus, Ivan


 

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Discussed in the following Daily reports:

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cqllabel = "case0815_floods_se_europe_aug23"



1. Impact

(To be added)On 4-5 September the low-pressure system named Storm Daniel produced extreme rainfall over south-eastern Europe, notably Greece where the one station measured more than 1000 mm/24h. The rainfall led to widespread flooding. Also in Bulgaria and Turkey the system caused damages and fatalities.


https://en.wikipedia.org/wiki/Storm_Daniel

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Station precipitation from Greece:  https://www.meteo.gr/UploadedFiles/articlePhotos/SEP23/compare_kakoκairies_ianos_daniel_meteogr.jpg , and some graphics below (unclear to which accumulation period it refers).

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3. Predictability

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3.1 Data assimilation

 

3.2 HRES

The plot below show precipitation totals 4 Sept 00UTC to 6 September 00UTC from observations and HRES.

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The plots below show 72-hour precipitation (4 September 00UTC - 7 September 00UTC) in observations (first plot) concatenated short forecasts (second plot) and ENS control forecasts with different lead times.Note that sea points have been masked out. The square marks a 0.5x0.5 degree box around Volos in Greece, which got more than 600 mm.

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