Category Archives: Weather Updates

CLOUD COVER

The cloudiness this morning had been predicted last night.

Cloudiness should dissipate from west to east.

Last night’s 2 AM (06 UTC) run of the major models show varying times for the cloudiness to break for sunshine.   Most of the short range models (RAP, HRRR) have sunshine by 10AM-12 noon.

However, NAM, NAM-NEST and the GFS are a bit slower with the cloud clearing, having some cloudiness lingering until 1-2 PM here in the Philadelphia area.

GFS percentage cloud cover forecast 1 PM Saturday.   (Click on image for a larger view.)

SUNDAY FORECAST UPDATE

Most of yesterday’s storms only affected the northern parts of our area, from central Montgomery county,  Bucks county and northward.

A cold front moves through this evening. The models are again forecasting scattered thunderstorms, this time affecting more of the immediate Philadelphia area including areas not affected yesterday.  The storms are expected to be scattered; again all areas won’t receive rain.

The weather parameters that are indicative of severe weather (Helicity, Shear, CAPE) are not as elevated as yesterday.

  • Sunny in the morning.  Clouds increase about 3 PM
  • High temp 89.4º sd 1.8º  Dew points 68-70º
  • Scattered thunderstorms 3-7 PM
  • Winds W 5-8 mph, increasing to 15 mph late afternoon.