Philadelphia Area Weather Forecasts

WEEKEND WEATHER FORECAST

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Sunday Forecast Update

Posted Sunday 06/09/24 @ 8:41 AM — Few of last night’s models captured this small line of showers moving through early this morning.

Line of light showers (1) moving northeastward at 8 AM, not forrecast by the HRRR, NAM-NEST or RRFS. Line #2 of showers is forecast to move through between 1-3 PM today. A mix of sunshine and clouds before and after. (Click on image for a larger view.)

Posted Saturday 06/08/24 @ 4:40 PM — It could not have been a nicer day on Saturday.

There are some timing changes for the weak frontal passage and light showers possible on Sunday.

Today’s models have moved these showers to the morning hours. Scattered, light showers possible as early as 9-11 AM. Somewhat heavier showers far northern suburbs. Additional lighter scattered showers possible 2-3 PM. Not everyone will see a shower. In fact, there’s a wide range of model forecasts with some models showing almost no shower activity here.

Saturday’s 18z NAM-NEST cloud/rain forecast for 11 AM Sunday. The NAM-NEST is more robust with the showers than the HRRR and may be over-done.) (Click on image for a larger view.)

Cloudy in the morning, a mix of clouds and sunshine during the afternoon Sunday.

No significant rainfall this coming week. Increasingly warm (hot) by the end of the week. By next weekend, eyes will turn to the Gulf of Mexico and Florida where some tropical development is suggested by the extended range models.

Previously Posted Fri 4:48 PM —Our area remains under the influence of an upper level low in Canada and a cool flow around this low. Daytime heating will result in some instability cloudiness, but most of the Saturday will be sunny.

Current satellite water vapor image (Friday afternoon) with superimposed RAP model 500-1000 mb thickness lines (yellow), Mean Sea Level Pressure isobars (black contours) potential vorticity (fine violet contours). Cool circulation around the upper low in Canada will be with us. (Click on image for a larger view.)

By Sunday, a weak disturbance and weak cold front moves through, bringing a bit more cloudiness and the chance of very light scattered showers in the afternoon.

ECMWF forecast for Sunday at 5 PM shows a weak disturbance with some light showers, especially South Jersey late afternoon. (Click on image for a larger view.)

Saturday

Partly to mostly sunny. Still somewhat cooler than seasonal average temperatures. Highs 80º (Blue Bell) to 83º (Philadelphia)

Sunday

Partly cloudy/Partly Sunny. A chance of light scattered showers during the late afternoon, mostly in South Jersey. Highs 81º (Blue Bell) 84º (Philadelphia)