Thursday, 11 April 2013

Rainy end to the week

Rainy end to the week, A stationary boundary lingering over northeastern Pennsylvania through southeastern New York will slowly drop south today with scattered showers and thunderstorms. Another cold front over the Mississippi River Valley will bring more rainfall through tomorrow afternoon ensuring a rather wet end to the week.

The warm air mass that supported temperatures in the mid to upper 80′s over the Philadelphia metropolitan area yesterday afternoon will be suppressed to the south by an advancing marine air mass from New England. Periods of showers and elevated thunderstorms will produce heavy downpours at times. Winds back to the northeast at 5 to 15 mph. Temperatures will vary significantly based on location with mid to upper 60′s over the Philadelphia metropolitan area and mid 50′s to lower 60′s over the New York City metropolitan area.

The cold front from the west will reach the Philadelphia and New York City metropolitan areas by tomorrow afternoon with widespread showers and elevated thunderstorms. The showers and thunderstorms will be capable of heavy downpours, wind gusts over 40 mph, and occasional lightning. Localized urban and flash flooding will be possible as well. Rainfall amounts through tomorrow evening will range from a half an inch to up to two inches. Temperatures will range from the mid 40′s to lower 50′s for lows and upper 50′s to mid 60′s for highs.

High pressure will take hold Saturday through Wednesday with tranquil weather conditions and seasonable temperatures. Scattered to variable cloud cover can be expected through the period. Temperatures Saturday and Sunday will range from the lower to mid 40′s for lows and upper 50′s to lower 60′s for highs. Temperatures Monday through Wednesday will range from the mid 40′s to lower 50′s for lows and mid 60′s to lower 70′s for highs.

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