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Midweek update on the temperature rollercoaster

Although this morning’s low temperature at the UMW weather station was a chilly 25 degrees (F) it will warm quickly today (Wednesday) to near the 60-degree mark.  As the day progresses more clouds will cover the ‘Burg ahead of a weak cold front that will push through late this afternoon with no associated precipitation expected.  Even after the front passes through our temperatures will remain above January normals (highs in the low 40s and lows in the 20s) with Thursday’s high climbing into the low 50′s.

The climb to very warm January temperatures will be delayed 24 hours or so as a high pressure system that is now over the central Great Plains moves quickly to the New England states and sets up yet another cold air damming wedge over the Mid-Atlantic as shown in this graphic for Friday morning:

The clockwise circulation around this high (the blue “H” near Cape Cod) will force cool and moist air down the East Coast and create the wedge (denoted by the black arrow), which will keep our skies overcast Friday with a slight chance of light rain or drizzle.  However we will still have a high temperature in the low 50s, which is several degrees above average.

THEN the warm air surges northward into the ‘Burg for the weekend.  Right now the official forecast is for temperatures to reach the upper 60s(!) and I wouldn’t rule out a 70-degree reading in the area either day.  Both weekend days will have more clouds than sun but it looks like things will be dry. Monday also looks very warm but as next week progresses the cool down will commence.  More on that later.

Permalink: http://news.fredericksburg.com/weather/2013/01/09/midweek-update-on-the-temperature-rollercoaster/