textproduct: Gray - Portland

WHAT HAS CHANGED

No significant changes since the previous forecast.

KEY MESSAGES

1. Dry conditions are expected this week with warm days and cool nights. This will result in worsening the water resource drought that is impacting much of the region.

DISCUSSION

KEY MESSAGE 1 DESCRIPTION...

Upper level low pressure will continue to exit the region tonight with weakening winds. This will allow mtn snow shower activity to end with partly cloudy skies expected overnight. Low temperatures will generally be into the 20s to lower 30s.

There remains strong agreement in latest global and ensemble based guidance that broad high pressure will build across the eastern half of the CONUS through much of this week. This will result in mainly dry conditions with warm days and cool nights. Daytime highs will likely reach the upper 50s to perhaps lower 60s some afternoons south of the mtns by mid-week before radiational cooling allows for 20-30+ degree diurnal ranges some days. This latest dry stretch will continue to result in growing rainfall deficits, worsening the ongoing water resource drought that is impacting much of the region.

AVIATION /18Z SUNDAY THROUGH FRIDAY/

Through Monday Night: Lingering MVFR CIGs at HIE and LEB will gradually improve tonight, although HIE may remain at MVFR through the first half of Monday. VFR conditions are expected across remaining TAF sites through the period. Gusty NW winds will diminish this evening to 5-10 kts through Monday. No LLWS is anticipated. Forecast confidence is moderate.

Tuesday-Friday: An extended period of VFR conditions is likely. Forecast confidence is moderate.

MARINE

A few NW wind gusts up to around 25 kts is possible outside of the bays this evening with seas of 2-4 ft. Otherwise, broad high pressure over the eastern CONUS will allow for light winds and low seas through much of this week.

GYX WATCHES/WARNINGS/ADVISORIES

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