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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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Tuesday afternoon update

UPDATE 9:15 pm: Technically speaking today was dry and sunny as the storms occurred after sunset. So why did these storms fire up? Colliding outflow boundaries, that’s why. This radar grab shows two boundaries approaching each other southwest of Fredericksburg (purple arrows).

1934 reflectivityThese outflow boundaries are from earlier storms that collapsed and pushed out wedges of rain-cooled air. These features act as mini cold fronts and when they collided the humid air between them was forced upward and voila!! New storms formed and moved northward thru the Fredericksburg area.

END UPDATE

 

1645Z vis satelliteThis visible satellite image from 12:45 pm shows a back door front (blue dotted line) sliding down the coast toward Fredericksburg and clouds building along the eastern slopes of the Blue Ridge mountains (white dotted line). While today will remain dry and sunny with a high temperature in the low 90s Wednesday will be about ten degrees cooler with showers and thunderstorms likely.

More details in tomorrow morning’s blogpost. Happy Tuesday!

 

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