textproduct: Caribou

WHAT HAS CHANGED

Issued a frost advisory for tonight for downeast zones. Also added a little more wintry precipitation to northern zones for Tue/Tue night.

KEY MESSAGES

1) After a fair weather and breezy day today, frost is likely tonight. Warm temperatures and breezy winds Sunday before the next rain chances early next week.

DISCUSSION

KEY MESSAGE 1 DESCRIPTION... High pressure builds over the region today and tonight before moving offshore Sunday. The remnants of Hurricane Isaias lift into the OH Valley on Sunday with moisture funneling up into southern areas late Sunday night into Monday morning.

Radiational cooling tonight will result in frost formation. The remaining zones still in season are the Midcoast zones and a frost advisory has been issued.

Breezy southwest winds will also funnel warm temperatures into the area Sunday into Monday. Highs will top out in the 60s both days, some 3-8 degrees above normal.

As the system moves off the southern New England coast, it could bring a chance of showers for the Downeast coast late Sunday night into Monday. Rain chances could decrease if the system stays further south, though there is still a good amount of uncertainty at this time. A separate low pressure develops over the Great Lakes Monday night as a trough deepens behind the departing tropical remnants. This will bring a chance of rain early-mid next week. Some wintry precipitation will be possible in the far north on Tuesday, but confidence is low.

AVIATION /10Z SATURDAY THROUGH WEDNESDAY/

Through today...VFR. West/northwest winds 10 to 15 kts, with gusts 20-25 kts in the afternoon. Brief 40 kt LLWS possible at northern terminals from KHUL north very early this morning, dissipating past sunrise.

Tonight...VFR. Light and variable winds.

Sunday and Sunday night...VFR. Winds from the south/southwest at 10-15 kts gusting up to 25 kts.

Monday and Monday night...VFR/MVFR for a chance of scattered showers throughout the day. Higher chances for rain for Downeast and northern terminals. WSW winds at 5-10 kts with gusts up to 20 kts. Winds shift to the north Monday afternoon, and east by Monday night.

Tuesday-Tuesday night...MVFR/IFR for scattered showers across the area. SE/S winds at 5-10 gusting up to 20 kts.

Wednesday...MVFR/VFR with possibly isolated to scattered showers. N winds 5-15kts.

MARINE

SCA level winds and seas go below small craft advisory levels this afternoon. Wind and seas could reach marginal small craft advisory conditions Sunday afternoon through early Monday. Winds/seas will be below small craft levels Monday afternoon and night. Seas will reach small craft levels Tuesday through the middle of the week. Rain possible Monday and Tuesday.

CAR WATCHES/WARNINGS/ADVISORIES

ME...Frost Advisory from midnight tonight to 8 AM EDT Sunday for MEZ016-017-029-030. MARINE...Small Craft Advisory until 2 PM EDT this afternoon for ANZ050- 051.