Saturday moist warm sector showers

Great explanation. Hopefully a few thirsty southern gardens and farms will be watered.

Reigate Grammar School Weather Station

2015-06-20_07-45-37

June has been a cool month so far and is still on target to be the coolest June since 1991, or very close.  It has also been dry with just 28% of monthly rain so far.

In contrast to this trend, mostly due to the Azores HIGH lodged to the SW and dragging in cool dry NW (bit unusual for a summer regime), today a humid moist warm sector crosses Reigate and this will bring a minor hiccup to the dry weather of the last week when there has been no rain at all in Reigate.  Humid air is due to arrive in the warm sector and by this is indicated by modestly raised dew points (high teens) and PWAT (precipitable water) exceeding 30mm, showing potential for some heavy rain around.

Of interest are surface winds which appear to converge in a zone across the south later today (spot the twisty…

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