02/22/13 8:05 AM
A storm over the Tennessee River Valley that has produced widespread snow, ice, and severe thunderstorms will redevelop off the Delaware coast this tomorrow and produce periods of heavy rain for much of the Philadelphia and New York City metropolitan areas this weekend.
The first wave of moisture from an advancing warm front will produce rain and snow showers along the coast and a mix of snow, sleet, and freezing drizzle over the interior this afternoon. The precipitation will be widely scattered and relatively weak. However, any icing on the roadways will make for hazardous conditions this evening so use caution driving. Temperatures will rise into the mid 30′s over the interior and upper 30′s to lower 40′s along the coast for highs this afternoon. Temperatures will fall into the upper 20′s to lower 30′s over the interior and lower to mid 30′s along the coast for lows.
The area of low pressure over the Tennessee River Valley will redevelop along the Delaware coast tomorrow morning. The low pressure system will produce a strong east and southeasterly wind throughout the region at 10 to 20 mph which will drive warm Atlantic air into the Philadelphia and New York City metropolitan areas. Temperatures will rise into the lower to mid 40′s along the coast and mid to upper 30′s just northwest of the Philadelphia and New York City metropolitan areas. With colder air over the interior, a mix of rain and snow can be expected. By Saturday night into Sunday, colder air will work into the region leading to a change over to snow for the far northern interior with up to 2 inches of snow and sleet over the far northern interior and 3 to 6 inches over northern and northeastern Connecticut. Temperatures will fall into the lower to mid 30′s over the interior and mid to upper 30′s along the coast.
The rain will exit on Sunday with winds backing to the northwest at 10 to 20 mph with gusts over 30 mph. High pressure will be in control for Sunday evening through Monday. Temperatures will rise into the mid to upper 40′s over the interior and upper 40′s to lower 50′s along the coast for highs and fall into the upper 20′s to lower 30′s for lows.
An area of low pressure will produce more periods of heavy rain along the coast and a mix of snow, sleet, and rain over the northern interior on Tuesday through Wednesday morning. High temperatures will range from mid 40′s to lower 50′s along the coast and mid 30′s to lower 40′s over the interior. Low temperatures will range from the upper 20′s to lower 30′s over the interior and mid to upper 30′s along the coast.
A series of disturbances will produce scattered snow showers on Thursday with chilly weather conditions. Temperatures will range from the mid 20′s to lower 30′s for lows and lower to mid 30′s for highs.