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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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The message
from "Alex Stephens Jnr" contains these words: I *think* it requires a severe gale mean windspeed, with heavy snow (blowing snow an obvious consequence). And visibilities obviously fall extremely low, probably less than 5m. I reckon you had a near blizzard there Steve, as the wind would have been gusting (but not mean) toward 50mph. Ask your neighbours Steve, I'm sure they'll tell you it can get a lot worse than it was this morning. Maybe you'll be able to tell me what a real blizzard is before the weeks out. ![]() Alex. "Steve Loft" wrote in message news ![]() Alex Stephens Jnr wrote: Some station in the north reporting Blizzard conditions (real blizzards), not moderate snow and a strong breeze which some confuse blizzards with. Alex, can you explain what is needed for a real blizzard? I described what just passed through here as a blizzard because I don't know any better. Snow falling, F5 wind and zero visibility. A blizzard? The "power cut" was just our main circuit breaker tripping, fortunately. -- Steve Loft Wanlockhead, Dumfriesshire. 1417ft ASL http://www.wanlockhead.org.uk/weather/ Observers Handbook (fourth edition) "Blizzard: the simultaneous occurrence of moderate ot heavy snowfall and winds of at least force 7 (28 knots) which causes drifting snow and a reduction of the visibility to 200 m or less" "Severe blizzard: the simultaneous occurrence of moderate ot heavy snowfall and winds of at least force 9 (41 knots) which causes drifting snow and a reduction of the visibility to near zero" It goes on to say that .... "These terms will not be applied to passing snow showers but only if a wide area is affected and the conditions last long enough to cause serious interference to human mobility, or disruption of communications." I've not been able to find reference to 'Blizzards' in the 'SPOT-ON Observers Guide' - the, to quote, "Met Office's updated guide to observing practices for the UK land-based observing network". But then I'm not suprised - while this 'guide' may help observers fill in the spaces on the CODET it's absolutely pathetic for 'real' observing. My SPOT-ON guide - despite its flashy plastic waterproof cover with its snap-shut flap - resides unloved on the bookshelf alongside the much thumbed 'Handbook. Bring back the days when observers were taught to observe by professionals at the Met Office college. What you get out is only as good as what you put in - fewer dependable obs and chaos can result. Admited AWS are improving but they should be used to fill in the gaps between the MK1 eyeball! rant mode off Dave Fair Isle |
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