Saturday, February 25, 2012
Forecast for Sunday, February 26, 2012
Throughout the evening, blustery conditions will continue. West winds will continue to cause lake effect snow flurries and snow showers. An isolated snow streamer cannot be ruled out. The highest chances are north and west of Philadelphia. Winds will slowly diminish late tonight and so will the lake effect snow activity. Winds will be sustained 15 to 25 MPH with gusts as high as 40 MPH after dusk. Late tonight, gusts will be less than 30 MPH.
Sunday will be sunny and dry. Winds should be much lighter and temperatures will be slightly above average. On Monday, a southwesterly flow will pump in unseasonably mild air and there is an opportunity for 60 degree readings south of Philadelphia. On Monday Night, we expect a cold front to pass through our area.
Questions and great uncertainty develops for the rest of the week. Computer models are diverging on the placement of key factors and their timing. Right now, our temperature forecast for Philadelphia has the potential to change dramatically from our current expectations. These are middle ground temperatures for now and are given with low confidence. They hinge on the placement of low pressure centers and warm front boundaries. Temperature differences of 20 to 30 degrees may be the rule of thumb as precipitation breaks out from the resulting pieces of energy. Northern areas may see freezing rain, sleet, and wet snow while southern areas may see soaking rain and thunderstorms. There is the potential, especially in the Poconos, for a significant and damaging ice accumulation if all cards fall into place. For now...Wednesday and Saturday into Sunday appear to be of greatest interest for potential issues. Stay tuned!