By Chris White

Weather Blog: Since Fredericksburg resides "in the seam" between the Richmond VA and Washington DC media markets this blog is a look at the weather from a Fredericksburg-centric point of view.

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At the moment the only significant weather warning in effect for Fredericksburg is a Flood Warning, which is to be expected after several inches of rain over the entire area.  The Advanced Hydrologic Predicition Service is now forecasting a crest on the Rappahannock River at 17.4 feet this evening as shown here:

Meanwhile there could be flooding along streams and tributaries as the rainfall gathers and rushes downstream to pour into the Rappahannock itself.

The center of ex-hurricane Sandy has now moved far enough west and north of the ‘Burg that the winds as of the 7:15 a.m. observation at Shannon Airport shifted from the southwest to the south.  If you use some aircraft pilot-type hand motions you can visualize this wind direction shift as the counterclockwise airflow around the storm’s center shifted from northwest to westerly yesterday afternoon and then to southwesterly after dark last night.  The incredible – to me – part of the storm was the low pressure values recorded at local weather stations.  The lowest pressure I found from a quick scan was 28.84″ at 11:35 p.m. last night which converts to 976 millibars (29.92″ or 1013 millibars is “normal”), an extremely low value as apparently Sandy broke or tied a lot of previous low pressure values on its march northward along the East Coast.

Now what?  The nor’easter that resulted from Sandy‘s clash with a strong push of cold Canadian air will slowly pull off to the north and east across Pennsylvania and upstate New York before crossing into southeastern Canada sometime Wednesday evening.  As it does the winds here will finally subside and the sun will actually peek out from behind the clouds tomorrow (Wednesday).  The high temperatures will warm up into the mid-50′s (F) and pretty much hang there through the weekend with plenty of sunshine and breezy conditions…but nothing as windy as we’ve seen the last 24 hours!

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