METAR EHAM 250955Z 21010KT 4500 BR BKN007 OVC008 05/04 Q1027 TEMPO 2500=
METAR EHAM 250925Z 20010KT 4500 BR SCT007 BKN008 OVC010 04/03 Q1027 TEMPO 2500=
Dus 10 knopen, wat samenhangt met een typische levensduur van minder dan 30 sec. van zo´n wervel:
Life span:
− Approximately 30 seconds, with a wind speed between 5 and 10 knots.
− Up to 85 seconds, when the wind speed is less than 5 knots.
− Up to 100 seconds in still air.
Groet,
Alwin
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