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Old February 20th 05, 10:52 AM posted to uk.sci.weather
John Hall John Hall is offline
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Default Lack of continuity in BBC forecasts

In article ,
Dave.C writes:
Can't really work out what to expect Monday onwards anymore. BBC seem to
have dropped the temps down to 2-3C but no more talk of the widespread snow,
only possibly snow showers "giving a dusting" on the East coast. Fair
enough, but the reasons for the changes aren't that clear from chart
differences so is it just an individual interpretation?
Countryfile should be worth a look - hope it's not Dan!


I think the difficulty at this range is in predicting just where troughs
embedded in the flow will be. Have a look here for the UKMO "FAX" idea
for T+24:

http://www.wetterzentrale.de/wz/pics/brack0.gif

Here for T+36, with a trough predicted to be crossing the SE:

http://www.wetterzentrale.de/wz/pics/brack0a.gif

T+48 is brack1.gif, T+60 is 1a, T+72 is 2, T+84 is 2a. There are also
T+108 and T+132, but by then you are getting rather a long way out to
have much confidence in the detail.
--
John Hall
Johnson: "Well, we had a good talk."
Boswell: "Yes, Sir, you tossed and gored several persons."
Dr Samuel Johnson (1709-84); James Boswell (1740-95)