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Old April 19th 14, 05:37 PM posted to uk.sci.weather
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Default Swanston, Edinburgh abrupt drop in relative humidity am 19th April

1050 wind E, temp/dew 13.6/4.4, RH 54%
1055 wind SSW, temp/dew 13.7/-5.5, RH 26%

Looking at the forecast soundings there was much drier air at 2000'. SSW
winds here are turbulent as they descend the steep N face of the
Pentlands. Presumably the change in wind direction was sufficient to
drag dry air down and cause the rapid fall in RH.

Another glorious day here with unbroken sunshine and Tmax 16.4.
--
George in Swanston, Edinburgh, 575'asl
www.eppingweather.co.uk
www.winter1947.co.uk
Davis VP2
 
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