Brian's exclusive forecast for Philadelphia PA:
Today: Variable cloudiness and windy at times. Warm with a high from 60 to 65.
Tonight: Mostly clear and turning colder with a low in the lower 30s.
Sunday: Increasing clouds. Colder with a high around 40.
Sunday Night: Snow developing. Snow may accumulate one inch by morning. Low around 25.
Monday: Snow tapering to flurries during the afternoon. Total snow accumulation 1 to 2 inches. High around 32.
The extended forecast calls for a mostly sunny sky on Tuesday with a low around 20 and a high in the mid 30s. Variable cloudiness with a few showers on Wednesday and Thursday with a low around 40 and a high near 55 each day.
A changeable weather pattern will occur this weekend in the Philadelphia area. Highs today will approach the low to mid 60s degrees today, but in 48 hours accumulating snow will be falling across the region as a late-season winter storm impacts the Middle Atlantic states. Although the air feels like spring today, it will be rather windy in the wake of a weak cold front that is moving through the area. Tonight, high pressure will build down from Canada and will cause the mercury to drop 35 degrees between now and Sunday morning. At the same time, an area of low pressure will develop to our southwest and track toward eastern North Carolina. Precipitation from this low will override cold, dry air at the surface and produce afternoon and evening rain showers on Sunday that will mix with, and change to snow by Monday morning. The track and intensity of this low is yet to be determined, and slight changes in the track will have a significant impact on where accumulating snow falls. At this time, the heaviest snow looks to fall south of the Mason-Dixon line, although downtown Philadelphia could pick up an inch or two. With most of the snow falling overnight and into the early morning hours on Monday, and with temperatures well below freezing, the snow will cause roads to become snow-covered and slick through mid-morning. Although this is not a major winter storm for the Philadelphia area, accumulating snow in the middle of March is noteworthy and will further add to what has been a snowy winter in the region. More updates will be posted throughout the weekend, but it is looking more likely that winter will be making its presence felt once again.
Click here for the average March lows and highs for Philadelphia. Click here for the sunrise and sunset times. For more weather updates, please visit my web site www.chesapeakebayweather.com, my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.