Thursday, December 16, 2010

Winter weather overspreads region

Good Morning;

A Winter Weather Advisory remains in effect for Central NC.  Winter Storm Warnings are posted for much of Central VA.  Radar indicates that a broad swath of precipitation has overspread the whole area.  Freezing rain is falling here in NC, snow will be soon hitting the ground in the Richmond area in VA.

RADAR image based in RDU shows moderate rain.
A comfortably warm jet stream blowing around 4500ft has transitioned the snow to sleet and freezing rain.  Ground surface temperatures are frozen to nearly 4" deep! Therefore rain will freeze on contact until the warm jet erodes the surface layer of arctic air enough to get the RDU area above freezing.

Central VA gets a winter wonderland of heavy snow ranging from 3-5" capped with ice. The warm front will not be able to proceed north enough to get them above freezing.

Once the system begins to clear it's effect as a veil between the present and Saturday evening's storm becomes more clear.  Right now the big question is going to be how close to the coast will the weekend system form?  That is somewhat dependent on where the coastal front left by the current system will be located.

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