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 to the forecast with this update.
KEY MESSAGES
1. High pressure continues to dominate the weather for the coming week. Expect dry conditions and no significant weather impacts.
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
High pressure settles overhead tonight and will set the stage for what is likely to be the coldest night of the season for most locations. Widespread 20s and some readings down into the mid to lower teens in the northern valleys are expected. We are also reaching the tail end of radiation fog season, but a couple hours of patchy fog around sunrise remains possible, especially south of the mtns.
The next cold front approaches Thu into Fri. Southwest flow will allow temps to warm back into the 60s and some 70s. The front itself looks to be largely dry again, with some showers most likely for the mtns and points north. Colder air will arrive first north of the mtns, so Fri may be closer to normal for those locations but still quite warm across the southern forecast area.
For the Halloween weekend high pressure returns with fairly typical late October temps. Then we look toward the start of November where the pattern looks to become more active again, which is not saying much after these last couple of weeks.
AVIATION /18Z TUESDAY THROUGH SUNDAY/
Through Wednesday: VFR conditions expected. With clear/calm conditions tonight there may be some patchy valley fog at LEB, CON, and MHT close to sunrise.
Outlook...
Thursday...VFR conditions expected. There may be brief period of IFR or lower in valley fog at LEB, CON, and MHT prior to sunrise.
Friday: Another front approaches the region and some MVFR CIGs may be possible north of the mtns, including HIE.
Saturday-Sunday: VFR conditions expected.
MARINE
Winds and seas expected to remain below SCA thresholds thru Wed under high pressure. As the high shifts offshore, southwest winds will increase Thu into Fri. Some gusts may approach 25 kt along with seas approaching 5 ft in the vicinity of Skate Bank. Overall I expect conditions to remain below SCA thresholds.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None. NH...None. MARINE...None.
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