Saturday, July 28, 2012

Disturbed Atmosphere This Afternoon

A few showers crossed the region overnight but by and large the region stayed muggy and dry.  A weak front lies across the Delaware Valley, evidenced by the near 70 degree start north of the city and the mid 70's across South Jersey (except Millville) and Delaware.  Philly's in the upper 70's at 6 AM and we're likely going to get to 90 for the 30th time this year if everything breaks right later on today.

A disturbance will cross the region this afternoon, pushing down from the northwest and helping to finish the push of the frontal boundary through the Delaware Valley overnight tonight.  This atmospheric disturbance will trigger thunderstorm development across the region this afternoon -- there are already showers and storms in Upstate New York and Western PA this morning. With the disturbance providing the agitation in the atmosphere and there already being sufficient mugginess around, the potential exists for heavy rainfall and gusty winds with any thunderstorm that fires up this afternoon. Storms will increase in coverage and move into the region from west to east this afternoon.

Highs today get to between 90 and 93 along I-95 (92 in the city), upper 80's at the Shore. With dew points in the 60's to around 70, it will feel a bit hotter out (upper 90's at peak heat). We'll have another post on storm timing, expectations in a little bit!