textproduct: Gray - Portland

WHAT HAS CHANGED

Little change to the going forecast other than to bump winds up some, especially in the mountains.

KEY MESSAGES

1. Westerly winds in the wake of a cold front will gust 25 to 35 MPH today, with higher gusts possible. A few power outages possible.

2. Mostly dry weather looks likely Friday and through most of the weekend. Next low impact precipitation chances return Sunday into the next work week.

DISCUSSION

KEY MESSAGE 1 DESCRIPTION...

A few showers will be possible in the mountains this afternoon but a dry day is expected for most. Due to a relatively warm start early this morning and strong downslope flow during the day, temperatures should rise into the 80s at most lower elevations, with 70s in the mountains. The main story will be the gusty westerly winds. Great low level mixing is expected which should allow 25 to 35 MPH gusts most locations. BUFKIT forecast soundings show the potential for a few 40-45 MPH gusts at times. There could be a few power outages with fully leaved trees. Higher gusts expected in the mountains. Expect wind gusts over 65 MPH at times above 4500 ft.

Cold air advection will continue tonight albeit with diminishing winds. Lows are expected to dip into the lower 40s in the mountains.

KEY MESSAGE 2 DESCRIPTION...

For Friday, expect cooler, dry, and breezy conditions with northwest winds gusting up to 25 mph through the first part of the day. Highs will mainly range from the low to mid 60s north, to the low to mid 70s south. Winds then relax under a clear sky Friday night which will lead to favorable radiational cooling conditions. Expect widespread lows in the low to mid 40s with some mid to upper 30s possible in the northern valleys.

The next trough and front will approach on Sunday, leading to our next chances of low impact precipitation. Additional low chances of rain will be possible through mid next week. Expect highs mainly in the 70s through the weekend and into the next work week with a couple of lower 80s across far southern New Hampshire.

AVIATION /12Z THURSDAY THROUGH MONDAY/

Any lingering IFR at RKD clears by mid-morning. Thereafter, VFR with westerly SFC gusts 20 to 30 kt today at all terminals. VFR conditions expected tonight. Valley fog likely at LEB and HIE.

Outlook:

Friday-Saturday: Mainly VFR. Valley fog possible at HIE and LEB by Friday night.

Sunday-Monday: Generally VFR, with MVFR possible in showers.

MARINE

A SCA remains in place for the bays and coastal waters for today. This mainly for strong southerly winds early this morning, then gusty nearshore winds during the day today along with seas that will gradually diminish. Fronts moving off the coast early next week and toward the middle of the week may lead to some rough conditions, but this will depend on their strength.

GYX WATCHES/WARNINGS/ADVISORIES

ME...None. NH...None. MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ150>154.