FORECAST UPDATE

Last night, I took a quick look at the models and saw that the forecast for Sunday had completely changed from 24 hours earlier.  I  updated the original post.

Sunday was originally forecast to be totally dry by several models.  Last night’s NAM showed an upper air disturbance moving through from the northwest early.

Today, things have changed further and this area of showers and thunderstorms is just entering our area at 10 AM. Showers move through and showers end by 2-3 PM.  Hazy sunshine with some clouds, warm and humid after the showers move through.

PHILLY WEEKEND WEATHER

Sat pm Update :An upper air disturbance drops through from the north on Sunday.  There’s a chance of showers early Sunday morning especially north and west, and more clouds than previously forecast.

Another unremarkable summer weather weekend. High pressure remains in control with mostly fair skies and slightly above average temperatures.

Highs 88-90 both Saturday and Sunday with increasing humidity and a bit more haziness and clouds on Sunday.

WEEKEND WEATHER FORECAST- FRI EDITION

An easy forecast to make for this weekend.   High pressure will bring a southwesterly flow of very hot, humid air into our region.  Both Saturday and Sunday will be sunny with highs on Saturday 95 and 99-101 on  Sunday. ( It’s July and having a heat wave is what happens in the summer!)

On a positive note, the latest model runs have a bit less humidity than previously forecast.  Dew points in the mid to upper 60s during the daytime hours.  This is a slight improvement over what had previously been predicted by the models; they had been showing dew points in the low 70s during the day.    It’s still going to be hot!

GFS model forecast
GFS Model forecast for Sunday afternoon.

The latest models have highs in the 90s for the next 7+ days!

Storm Forecasts & Other Things "up in the air".