Daily Archives: Friday, March 12, 2021 7:13 pm

Philadelphia Area Weather Forecasts

WEEKEND WEATHER FORECAST

Saturday morning update:

Saturday’s NBM shows even very windy  conditions for Sunday than forecast last night. (This morning’s RAP and HRRR forecast even higher wind gusts than the NBM.)  Understanding Wind barbs    (Click on image for a larger view.)

 

from Friday night…

A weak cold front moved through Friday morning. Another front will move through before daybreak Saturday.

We’ll be in a northwesterly upper air and surface flow—

Short Range Ensemble Forecast (SREF) model showing northwesterly upper flow on Sunday at 2 PM (Click on image for a larger view.)

We’ll have sunny skies on Saturday and high temperatures 48.3º sd 2.3º (Model Blend-Blue Bell)

Sunday will continue with mostly sunny skies, but an upper air disturbance moving through may bring some partial cloudiness for part of the afternoon. The same disturbance will likely cause it to be windy. High temp 53.1º sd 3.2º (Model Blend-Blue Bell)

Winds for Saturday and Sunday:

NBM (National Blend of Models)  wind forecast Saturday and Sunday Blue Bell. Wind barbs show westerly winds changing to northwesterly with higher gusts on Sunday .  (Click on image for a larger view.)

Outlook: While it’s been mild and dry, this weekend’s change to more ‘normal’ temperatures will be a prelude for wet weather next week and colder weather next weekend.