7:00 AM | ****A major mid-week mess on the way with significant accumulating snow likely on the front end****
Paul Dorian
6-Day Philadelphia Forecast
Today
Cloudy, damp and cold this morning, becoming windy and milder this afternoon with some sunshine, highs in the mid 40’s
Tonight
Partly cloudy, cold, lows in the lower 20’s
Tuesday
Partly sunny, cold, mid 30’s for afternoon highs
Tuesday Night
Becoming cloudy, cold, slight chance of snow late, low-to-mid 20’s for overnight lows
Wednesday
Cloudy, cold, snow develops in the mid-to-late morning becoming heavy at times, snow may change to sleet and/or freezing rain later in the day, low-to-mid 30’s
Thursday
Mainly cloudy with a chance of rain early, cold early in the day then becoming milder late, upper 40’s
Friday
Partly sunny, cold, low-to-mid 40’s
Saturday
Mainly cloudy, chilly, chance of rain, mid 40’s
Discussion
*A mid-week mess is on the way that will likely include significant accumulating snow on the front end*. By late Tuesday, strong high pressure will be forming to the north and northwest of the Mid-Atlantic region and there will be lots of moisture pushing northeastward from the Gulf of Mexico. This area of high pressure will lock in a cold, dense air mass in the lower levels of the atmosphere – at least for the onset of a mid-week storm system – setting us up for “overrunning” type precipitation as warmer air initially rides up and over the surface air mass. One surface low will trek from the Gulf coast states to the Great Lakes while a secondary low develops near the Mid-Atlantic coastline – quite similar to the setup early last week which resulted in snow, ice and rain for the Mid-Atlantic region. Snow is likely to break out here during the mid-to-late morning on Wednesday, possibly becoming heavy at times, and then it could change to sleet and freezing rain later in the day as milder air pushes in from the southeast. Significant accumulations of snow are likely here on Wednesday before any changeover to sleet and freezing rain takes place.
Meteorologist Paul Dorian
Perspecta, Inc.
perspectaweather.com