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| Titel |
Meteorological environment of a tornado outbreak in Southern Romania |
| VerfasserIn |
I. C. Oprea, A. Bell |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 2 ; Nr. 9, no. 2 (2009-04-23), S.609-622 |
| Datensatznummer |
250006726
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| Publikation (Nr.) |
 copernicus.org/nhess-9-609-2009.pdf |
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| Zusammenfassung |
| On 7 May 2005, a squall line with an embedded bow echo formed over Southern
Romania causing severe wind damage. The length of the wind damage was around
150 km. Three tornadoes have been reported, two of them being recorded by
video camera. One of the tornadoes occurred in Buftea (near Bucharest), the
second in Ciobanu village (near Medgidia radar site) and the third in
Movilita village, 40 km to the northeast of Bucharest. The site surveys
confirmed wind damage associated with these tornadoes. Based on damage, the
Movilita village tornado was classified as an F1 type on the Fujita scale,
and the Buftea and Ciobanu village tornadoes were classified as F0. Large
scale forcing was provided by a vigorous upper level trough. The squall line
developed in the warm sector of a low, ahead of the cold front.
The Bucharest EEC-DWSR-2500C Doppler velocity depicted cyclonically rotational
structures associated with the left end of the bow echo. In two hours this
squall line traversed the southern part of the country. The northern end of
the line preserved the bowed structures and high reflectivity gradient in
front of them. The dry air associated with the descending rear inflow jet
was evident as rear inflow notches in the reflectivity field of the
Bucharest C-band radar and the Medgidia S-band WSR-98 D radar. The synoptic
and mesoscale environment associated with 7 May 2005 bow echo had many
similarities to the "dynamic" pattern described by John and Hirt (1987).
Herein are analyzed the combined effects of synoptic and mesoscale
circulations, together with the data provided by C-band EEC-DWSR-2500C and
S-band WSR-98D radars, and the ECMWF and ALADIN model output data.
Some operational aspects of the warning process are also discussed. |
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