6:00 AM | *****Major impact by a "two-part" storm system*****
Paul Dorian
6-Day Philadelphia Forecast
Today
Cloudy, breezy and cold, occasional snow is likely to develop this morning and it can then become mixed with sleet and/or rain at times this afternoon, highs in the mid-to-upper 30’s
Tonight
Snow mixed with sleet and freezing rain at times becoming all snow late, becoming windy, cold, lows in the upper 20’s
Wednesday
Cloudy, windy, cold, snow, heavy at times, possible thunder snow included later in the day, low-to-mid 30’s for afternoon highs
Wednesday Night
Cloudy, windy, cold, snow winds down during the evening hours, possibly heavy at times before ending, mid-to-upper 20’s for overnight lows
Thursday
Partly sunny, breezy, cold, lower 40’s
Friday
Mainly sunny, chilly, mid 40’s
Saturday
Partly sunny, cold, chance of snow or rain, low-to-mid 40’s
Sunday
Mainly cloudy, breezy, cold, low-to-mid 40’s
Discussion
Spring officially begins today and the weather will be anything but spring-like in the Mid-Atlantic region. Strong, cold high pressure from southeastern Canada will build into the Northeast US over the next 24 hours and this will be a key player and an important cold air source for the Mid-Atlantic region during the upcoming long-lasting and significant weather event. This upcoming event will, in fact, be kind of a "two-parter" with the first system likely to bring a mixed bag of snow, sleet and/or freezing rain today into tonight and there can be an ice build-up on some surfaces. The second and stronger system comes late tonight and Wednesday and this is likely to develop into an all-out snowstorm for the DC-to-Philly-to-NYC-to-Boston corridor with significant snowfall here on the order of a 8-14 inches by tomorrow night. Snow accumulations during today and early tonight will be limited due to the expected mixed variety of the precipitation. In addition, there will be increasing NE winds adding to the threat of power outages and perhaps even possible isolated "thunder snow" during this event with very heavy snow rates possible later tomorrow.
Meteorologist Paul Dorian
Vencore, Inc.
vencoreweather.com