Wednesday, December 4, 2013

12/4/13 Wed AM Update: The potential for a major Icestorm across much of VA is diminishing.

Wed AM Update: The potential for a major Icestorm across much of VA is diminishing. Trends are now favoring a milder solution and more prodominent low riding up the western spine of the Apps for Sunday into Monday.

The Arctic High moving to our north across the Midwest and New England, will provide a CAD signature later Saturday Night into Sunday. This will be shortlived as stronger SW flow and ...WAA takes over Sunday night into Monday.

Some IP and ZR will likely fall across ROA/LYH/CHO VA areas later Sat Night into Sunday afternoon, before changing to rain later in the afternoon and Sunday night. A light to moderate Ice accumulation can be expected during Sunday.

Temps will range between 28-32 during the Ice and during the daytime hours. This is much different than temps being between 25-28 and at nightime. Ice will have a tougher time to accumulate on surfaces during the daytime hours due to solar radiation and temps being closer to 30/31 during the main event ! In addition the higher QPF's will set up to our North and West. Precip amounts of .50" to .75" will be common across Central VA. Half or less being freezing rain and sleet, the rest rain.

Temps will quickly rise during later Sunday night into Monday and could reach 45-50 over Central VA. These are my prelim thoughts for now on this event, but stay tuned for a final update, if needed on Friday.

Take Care,
Ruggie

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