| Weather pictures & report of May 20 2006 |
| Single and multi-cell thunderstorms on trough lines. |
| Synopsis: advection of unstable air from SW. Steering feature was a low of 988 hPa over south of U.K.. After the cold front two major trough lines developed, both passing between 1100-1400 over the center of Belgium. Upper winds at 900 hPa were around 50KT, and during the second through line this windspeed was also observed on the ground. The first trough line had some nice whale's mouth feature as well. All pics taken at Steenokkerzeel (5km southwest of Kampenhout) in local time (CET). |
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Satellite picture at 1100 CET. Developing linear multi-cell near my area (red S) were responsible for the photographs of the whale's mouth below. (Source satpicture: Wokingham weather)
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Radar sequence between 1000-1145 CET showing Cb tops up to 5km. (Source radar picture:
Belgocontrol)
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20/05/2006 1108 SW. Incoming shower with dark rain shaft.
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20/05/2006 1110 SW. Same shower coming closer.
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20/05/2006 1112 SW. Developing shelf, soon we were in the inside part of
it with some light rain as well.
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20//05/2006 1112 SSW. Same view further southwards.
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20/05/2006 1117 SSW. Bit later, the whale opened its mouth.
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20/05/2006 1118 SW. Whale's mouth with rain shaft on right
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20/05/2006 1120 SSW. Boiling cloudiness and gusty winds up to
38KT.
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20/05/2006 1121 SSW. Panorama stitch of two pictures giving an idea of the length of the whale's mouth. A bit later heavy rain + some small hail (around 0,5 cm) were observed.
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20/05/2006 1321 WSW. At the back of the multi-cell storm, with rather low
lightning activity, some mamma features. Left the tower of Zaventem on
which most photographs were taken.
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20/05/2006 1329 E. View on the other side with large Cb anvil and some mammatus.
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Radar sequence between 1330-1430 CET. Radar image of another incoming trough line, Cb tops
up to 7km. Pictures to be found below. (Source radar picture:
Belgocontrol)
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20/05/2006 1410 WNW. Cb anvil of incoming trough.
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20/05/2006 1413 SSW. View on the southern edge.
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20/05/2006 1416 S. Rainshaft coming in.
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20/05/2006 1419 SE. Blustery shower with at that moment a wind gust of
51KT.
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