textproduct: Gray - Portland
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
WHAT HAS CHANGED
No significant changes with this forecast update with quiet weather expected through the weekend.
KEY MESSAGES
1. High pressure brings mostly dry weather and seasonable temperatures through the weekend.
2. A trough of low pressure brings daily shower chances Monday through the middle of next week.
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
Cooler and drier air works into the region through today behind a cold front that crossed last night. Highs will range from the upper 60s north to near 80 degrees near the coast. Winds will be steady out of the WNW while some onshore winds will likely develop this afternoon near the coast. Broad high pressure over the Great Lakes slowly slides east through the weekend bringing fair weather. Day time highs will generally be in the 80s with onshore winds keeping coastal areas cooler than the interior. Favorable radiational cooling conditions will bring lows into the 40s and 50s tonight and again Friday night.
KEY MESSAGE 2 DESCRIPTION...
Ensembles are in good agreement that troughing will deepen over the Northeast Monday through the middle of next. This will allow for daily chances for showers while pinning down systems moving through the trough is difficult at this time. The NBM generally keeps PoPs below 30 percent Monday and increases PoPs to around 50 percent Tuesday and Wednesday.
AVIATION /06Z THURSDAY THROUGH MONDAY/
Through 06z Friday...VFR is expected with winds shifting WNW behind a cold front. Low confidence remains in fog tonight, but could form in valleys that saw some rainfall today (lower CT River Valley, Merrimack, AUG near Kennebec Valley). VFR Thursday.
Outlook:
Thursday- Sunday: Generally VFR conditions are expected as high pressure settles over the region. Dry air should limit overnight valley fog development.
MARINE
Waves will continue on a downward trend tonight while they will still remain at or above 5 feet into early this morning. Offshore winds this morning will flip back onshore this afternoon. Winds and seas will be below SCA thresholds this afternoon through the weekend under strong and broad high pressure entering the region.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None. NH...None. MARINE...Small Craft Advisory until 6 AM EDT Thursday for ANZ150-152- 154.
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