Wednesday, July 18, 2012

July 19th, 2012 Forecast

Whether today or tomorrow is the last day of 90+ temperatures is immaterial.  Humidity will remain high through at least tomorrow so despite the air temperature being 89, 90, or 91 tomorrow afternoon it's going to feel solidly in the 90's at peak heat.  With a frontal boundary slowly slipping south through the region, the threat for thunderstorms will be in our forecast through Friday before improving weather takes hold this weekend.

Tonight's thunderstorm threat should subside by late this evening across much of the region...there could be a lingering thunderstorm overnight but odds favor the vast majority of thunderstorms to occur over the next several hours.  Some will be severe with gusty winds.  Heavy rainfall is also expected in spots.  Patchy fog is possible late tonight with lows mainly in the middle 70's from Philly on south, lower 70's north of town.

Tomorrow's thunder threat will be more concentrated in the afternoon and evening hours, much like today, but the threat of storms will be higher for those south of the city than for those farther north although anybody is at risk for a scattered thunderstorm tomorrow.  Any storm could bring locally heavy rainfall and gusty winds again.  Highs will range from the upper 80's to lower 90's inland, mid 80's at the Shore...thankfully a bit less "hot" although with humidity pretty high it'll still feel pretty hot.

The thunder threat will continue into Friday, perhaps with another round of soaking thunderstorms during the day as a low pressure wave or a MCS comes rolling through portions of the region.  The specifics on Friday's storms are to be determined but modeling is hinting at another day of thunder threat.  The weekend does look nicer as the front finally pushes south, resulting in improving weather for both Saturday and Sunday with highs both days in the 80's.