textproduct: Gray - Portland

WHAT HAS CHANGED

Forecast is largely unchanged, but chances for light snow Sunday were increased based on ensemble agreement.

KEY MESSAGES

1. Warmer temperatures in store for Saturday.

2. Light snow possible Sunday.

3. Brief shot of well below normal temperatures early next week.

DISCUSSION

KEY MESSAGE 1 DESCRIPTION...

Not much to say other than widespread 40s are expected Sat. This will be notable only because of how cold it has been in 2026. There have really only been a handful of above normal days, so this will feel especially spring-like.

KEY MESSAGE 2 DESCRIPTION...

Cold front approaches Sun with warm advection continuing ahead of it. The combination of warm advection and frontal lift may be enough for an area of light snow to move quickly thru the forecast area. Ensemble guidance is roughly 60/40 in favor of some light QPF Sun, so I have opted to bump NBM PoP to around 50 percent from 30. Given how quickly things will be moving and how marginal temps are, any snow accumulation should be light. Current forecast is for an inch or less across the forecast area.

KEY MESSAGE 3 DESCRIPTION...

Good ensemble signal for much colder weather by Sun night into Mon. Once cold front drives thru the region temps will fall thru Sun night. NBM guidance is a good 10 degrees below normal already. This seemed a fair forecast to highlight well below normal temps. Will have to watch whether winds can remain up thru Sun night because it is possible that wind chills could dip to 20 below across the northern zones if that is the case. This cold air will be rather fleeting though, with temps returning to near normal by Tue.

AVIATION /18Z THURSDAY THROUGH TUESDAY/

Any lingering wind gusts drop quickly late this afternoon and early this evening. Otherwise VFR conditions prevail thru Fri.

Outlook:

Friday Night: VFR conditions expected.

Saturday: VFR conditions expected.

Saturday Night: VFR conditions expected.

Sunday: Areas of IFR in light snow/snow showers possible.

Sunday Night: VFR conditions expected.

Monday: VFR conditions expected.

Monday Night: VFR conditions expected.

MARINE

Winds and seas continue to diminish tonight and remain below SCA thresholds thru Fri night. Sat southwesterly winds will begin to increase ahead of an approaching cold front and marginal SCA conditions are possible outside of the bays. This may continue thru Sun until the front crosses the waters and winds shift to westerly. They remain gusty immediately behind the front before diminishing Mon.

GYX WATCHES/WARNINGS/ADVISORIES

ME...None. NH...None. MARINE...None.