WEEKEND WEATHER FORECAST Updated

This weekend’s weather is shaping up to be somewhat similar to last weekend’s Sunday-Monday forecast.  Less than perfect weather for the start of June.

Low presssure developing near the Delmarva coast along with the moisture remnants of Tropical Storm Alberto will bring rainy conditions for much of Saturday. It will be warm and humid, with high temperatures in the low 80s.  There may be some sun mid-day.

Sunday afternoon
Fri PM updated outlook for Sunday afternoon

Like last weekend, high pressure will nose down from the northeast on Sunday suppressing rain to our south.  An easterly flow will bring cool, mostly cloudy and damp conditions but much of the day Sunday will be rain-free. High temperatures 68.

[su_note note_color=”#d9f2da”]Friday 11PM Update: Tonight’s NAM shows showers returning late morning on Sunday; Sunday doesn’t look dry as previously forecast .[/su_note]

There’s the chance of showers returning Sunday evening.

PHILLY WEEKEND WEATHER OUTLOOK

GFS forecast for Saturday evening
GFS forecast Saturday evening

The outlook for this weekend’s weather is looking remarkably similar to last weekend’s weather.  (Not a good thing!)

Like last weekend, high pressure nosing in from the northeast will result in an easterly wind flow that will keep things damp and cool. Moisture from the remnants of Alberto transported into the Midwest will also be pulled in.  Weak low pressure is also expected to develop near the Delmarva and remain blocked from moving away, also resulting in low clouds and showers/thunderstorms.

Like last weekend, there are differences between the GFS and NAM with the GFS having heavy rain on Sunday, but the NAM not so much.  I think the NAM did best last weekend.

So there’s uncertainty about how much rain and when.   Right now Saturday looks like the wettest day, based on the NAM.  Sunday may turn out drier.

Weather… and Other Things 'Up in the Air'