Wednesday, September 24, 2008

Rain & Windy conditions for later this week !

A synoptic setup, for a steady light to moderate rain, and windy conditions are favorable for both Thursday and Friday. A very strong, high pressure system now over the NE, will move off the New England coast tonight and Thursday. Low pressure will develop off the SE Coast and move slowly north, to the NC Coast Thursday night into Friday.

This very strong high pressure system, well off the New England coast, and to our Northeast, will become nearly stationary Thursday into Friday. Very cool air associated with this High will travel over a large area of warmer waters. At the same time our developing low off the Southeast coast, will produce a tight pressure gradient and increase moisture from the Atlantic.

Clouds will increase tonight and by tomorrow, rain and increasing winds will develop. During later Thursday into Friday, this east to northeast fetch will be at it's strongest, resulting in a steady light to moderate rain and Windy conditions. Rain along with winds of 15 to 30 MPH will be common throughout the Delaware Valley during this time.

Later Friday into Saturday, things will gradually taper down to occasional light rain and showers. The High pressure will weaken and move further into the North Atlantic, but a second storm will pass well offshore on Saturday and poised for coastal New England. This system will prolong the inclement weather Friday night and Saturday, with occasional light rain and breezy conditions.

I'm expecting a total of 1.00" to 2.00" of rainfall from Thursday into Saturday, with the heaviest rains falling Thursday afternoon into Friday. A few areas could see over 2.00" in spots. All this activity will move out later Saturday, giving way for a nice day on Sunday.

Temperatures during this event will be quite cool as highs will struggle to get past the upper 60's for Thursday, Friday, and Saturday. Lows will be in the mid to upper 50's. With windy conditions and rain, It'll fell quite chilly, and raw during this event. A good taste of Autumn has arrived. For next week, there are signs of the coolest airmass of the season moving in for the middle and end of next week. Highs in the low to mid 60's and lows in the 40's are quite possible, more on this later.

Take Care,

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