Almost an air frost

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Almost an air frost

Postby Len Wood » 2014 Dec 13, 12:41

Still waiting for the first air frost of 2014 here.
Came very close last night with min of 0.6C.

Also, not quite my lowest temperature of the year which was 0.5C on 5th Jan.
Len

Wembury, SW Devon coast
N50.33 W4.13
Altitude 83 m asl
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Posts: 349
Joined: 2012 Jan 28, 16:12
Location: Wembury, coastal SW Devon, 83 m asl

Re: Almost an air frost

Postby greg_gruner » 2014 Dec 14, 19:55

There was certainly an air frost last night here in Farnborough - the 7th of the season.
Min was -2.9C, colder than at any time last winter.

The curious thing was that this morning the temperature rose from -2.0C at 0700 to +2.0 at 0800. Certainly no sun at that time; it must have been the advection of warm air. Even an increase in cloud cover would not alone explain such a rise.
Much milder now. Currently at 1950 it is +9.1C (compared to -1.2C at the same time yesterday).
Greg Gruner
Farnborough, Hampshire
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