Forecast Discussion
Summary
SYNOPSIS
... High pressure will retreat toward New England through Monday. A wave of low pressure will develop over the Tennessee River Valley and pass over or just south of the Mid-Atlantic during this time. Another wave of low pressure will likely pass well to the south on Tuesday. High pressure will return Wednesday into Thursday, then another storm system likely approaches Friday into Saturday.
NEAR TERM /THROUGH TONIGHT/... Mainly and dry conditions are forecast into this evening. West to northwest wind gusts of 15 to 25 mph will diminish by sunset.
Clouds will increase overnight as low pressure developing over the Tennessee River Valley approaches the region. Given abundant dry air in place ahead of it, no precipitation is expected through daybreak.
Low temperatures overnight are expected to be in the 40s, which is around normal for late March.
SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... Low pressure is expected to pass over or just south of the Mid- Atlantic on Monday. Scattered to numerous rain showers are expected from mid/late morning through the afternoon; it may not be a constant rain, but rain will be around much of the day. Amounts overall look light - generally a quarter inch or less.
If cooler, stable air near the surface can't mix out, patchy fog may result Monday evening.
Another wave of low pressure is forecast to pass by to the south on Tuesday. This wave will likely be a bit further south, but it will be close enough to deliver another potential round of rain showers. A few snow showers are possible over the Alleghenies.
Cooler than normal temperatures are expected to start the week. This translates to highs in the 50s and 60s (cooler Tuesday), and lows in the 30s and 40s (coldest Tuesday night).
LONG TERM /WEDNESDAY THROUGH SUNDAY/... High pressure will build over the region Wednesday into Thursday, though a weak wave may allow for a cold front to push across the region Wednesday night. This could result in a few rain or snow showers over parts of the Alleghenies. Temperatures will be seasonable.
High pressure will build into the region Thursday and Thursday night before moving east by Friday. Dry conditions and seasonable temperatures expected. A return flow Friday into Friday night will bring warmer air northward ahead of the next low pressure system. Rain showers will develop ahead of and along a developing warm front late Friday into Friday night.
As a low pressure system moves by to our northwest Saturday, an affiliated cold front could spawn additional showers and perhaps a rumble of thunder. High temperatures likely push into the 70s, but this will depend on if the warm front can move north or not.