Today’s forecast probably over-stated the cloud cover.   I usually use the GFS relative humidity data for cloud cover, but for tomorrow, I’m trying the NAM relative humidity upper air data for predicting cloud cover.

So, after a bit of sun early Sunday morning, there should be an increase in cloudiness as the morning and day proceeds,   Showers appear likely by 5 PM, then becoming windy and cooler.

High temperatures will be in the low 70s!

As mentioned on Thursday, a complex  scenario influences our weather today, but the models did impressively well with many of the major features.

With this complexity, there  are some changes in today’s forecast- According to the HRRR and GFS-LAMPS models, it appears that rain will linger in the immediate PHL area until about 10 AM.   The HRRR shows some showers reappearing about noon and lasting a few more hours.  According to the LAMPS forecast, we won’t see any bright skies or sun until late afternoon, after 4 PM (if at all.)

As suspected, temperatures will be colder than previously forecast, with highs only about 54.