Status:Ongoing analysis Material from: Linus, Fernando
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Discussed in the following Daily reports: |
1. Impact
Report from Zoltan Sipos:
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On 17 September, 2017 in northern Serbia and western Romania occurred a derecho event, which corresponds to the definition of this phenomenon: wind damage extends for more than 400 kilometers, includes wind gusts of 93 km/h along most of its length, and also includes several, well-separated 121 km/h or greater gusts. In western Romania, at meteorological or airport weather stations, the wind gusts reached: 25 m/s Sinnicolau Mare, Batos, Sighetu Marmatiei, Bistrita; 26 m/s Zalau, Baia Mare, Ocna Sugatag, Sebes, Alba Iulia; 27 m/s Cluj Napoca, Deva, Toplita, Tg. Lapus, Arad airport; 28 m/s Tebea, Poiana Stampei, Sarmasu, 29 m/s Borod, Holod; 30 m/s Timisoara, Resita; 31 m/s Siria; 32 m/s Varadia de Mures, Rosia Montana; 34 m/s Jimbolia, Gurahont; 35 m/s Stei; 36 m/s Ceahlau Toaca; 39 m/s Banloc, 40 m/s Huedin; 42 m/s Vladeasa 1800. There were 8 dead and dozens injured.
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Severe weather reports from the European Severe Weather Database for 17th September 2017:
2. Description of the event
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The plots below show the EFI and SOT for wind gusts valid 17 September.
Convective EFIs for both CAPESHEAR (left) and CAPE (right) for different forecast steps starting from day+1 (top) to day+6 (bottom). CAPESHEAR EFI provided stronger signal of severe convection than CAPE EFI but for both parameters the EFI values are not particularly strong over the affected areas in northern Serbia and north-western Romania.
T+000-024h:
T+024-048h:
T+048-072h:
T+072-096h:
T+096-120h:
T+120-144h:
3.4 Monthly forecasts
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