Monthly Archives: July 2015

Philadelphia Area Weather Forecasts

Philly Weekend Weather Forecast

This forecast was updated Saturday 8AM–The models have the frontal boundaries falling apart today. So few if any clouds today (Saturday) and Sunday looks to be sunny and dry. Humidity increases Saturday night through Sunday. .

High pressure that has brought this beautiful weather will drift off to the east late Saturday. A return flow of more typical July temperatures and humidity  will move in very late Saturday and Sunday.

Saturday  will be sunny and very warm with highs near 90. Some clouds move in late afternoon as a weak warm front will move,through Saturday evening.

The continued flow of warm and humid air Sunday will allow temperatures to approach 90 with increasing humidity with mostly sunny skies. Some diffuse instability will cause some clouds mixed with Sunshine and there is a chance of scattered thundershowers late in the day. No specific advanced trigger will make predicting the location of these showers impossible at this time.

 

Weather Updates

Philly Weather Update

The ultra short range models (HRRR and LAMPS) haven’t been doing too well predicting the morning showers today (Saturday) in Philadelphia.   A line of showers/thunderstorms went to our north through Bucks county and another area of showers is fallling apart to our south.

The actual warm front boundary is very diffuse, but  based on dew points, it’s just to our west and south.  The GFS-based LAMPS still maintains a chance of showers between now and 4 PM, but it’s hard to hang your hat on that forecast.

If the warm front passes through and we get breaks of sunshine, instability alone could trigger scattered showers, but predicting location is going to be even more difficult than this morning’s forecast when we had a distinct trigger.

Sunday is still looking to be sunny, hazy, hot, humid and dry.