Wednesday, July 10, 2013

July 11th, 2013 Forecast

We're watching the squall line in Western Pennsylvania as it marches east and southeast.  If it holds together, it should reach the Philadelphia metro after 11 PM with thunderstorms.  Any storm could be strong to severe with gusty winds...but the threat for severe storms will diminish after sunset.  Lows by morning will drop to around 70 or the lower 70's depending on location.

Thursday will provide the opportunity for more scattered thunderstorms -- some will be locally strong, perhaps severe with the threat of heavy rain in spots.  The best chance for these will be in the afternoon.  Highs will reach the mid 80's away from the Shore, with the Shore generally in the lower 80's.

What looked like a more promising weekend for dry weather may be trending away from that.  Model guidance at midday today suggested an upper level feature will meander through the Delaware Valley this weekend, bringing the chance for showers or storms both Saturday and Sunday.  It doesn't look like a widespread soaking of rain but it will be a bit more unsettled if these model trends hold.