textproduct: Caribou

WHAT HAS CHANGED

No significant changes.

KEY MESSAGES

1) Potential for patchy frost tonight, Tuesday, and Wednesday nights across the north.

2) A coastal low could impact at least Downeast Maine late this week.

DISCUSSION

KEY MESSAGE 1...Potential for patchy frost tonight, Tuesday, and Wednesday nights across the north.

KEY MESSAGE 1 DESCRIPTION... A strong 1030mb high pressure system located over Ontario builds south into the area tonight, with skies clearing over the north. Anticipating for low lying valleys to decouple across the north, with clear skies, high RH, and generally light winds. Occasional breezy winds could reduce fog chances.

High pressure remains over the region Tuesday and Wednesday nights with clear skies and light winds. This will provide favorable conditions for radiational cooling. Patchy/areas of frost are expected Tuesday and Wednesday nights across northern and central portions of the region. Temperatures could fall below freezing across the normally colder northern low lying and valley locations.

KEY MESSAGE 2...A coastal low could impact at least Downeast Maine late this week.

KEY MESSAGE 2 DESCRIPTION... A coastal low is expected to develop across the Mid-Atlantic region later this week while high pressure remains centered over Quebec. The track of the ocean low is still uncertain with blocking high pressure to the northwest of our forecast area and ridging across the Great Lakes. Uncertainty remains regarding the northern edge of the precipitation shield and whether rain will reach Maine. Northerly to northeasterly winds could become gusty over the weekend, especially along the coast, as a tight pressure gradient forms.

AVIATION /18Z MONDAY THROUGH SATURDAY/

This afternoon...MVFR/VFR ceilings improving to widespread VFR ceilings at all terminals this afternoon. NW winds 5-10kts, with gusts to 10-20kts at northern Aroostook terminals.

Tonight-Tuesday...Mainly VFR, though may see variable conditions in patchy fog early Tuesday morning. Conditions look too dry and breezy to get persistent thick fog, but it is not out of the question in colder northern spots that reach their crossover temperatures. NNW around 5-10kts.

Tuesday night-Thursday night...Variable conditions in any patchy late night fog. Otherwise, VFR. North/northeast winds 5 to 10 knots.

Friday-Saturday...VFR north. VFR/MVFR Downeast with a chance of rain. Across northern areas, northeast/north winds 5 to 10 knots. Across Downeast areas, northeast/north winds 10 to 15 knots with gusts up to around 20 knots.

MARINE

N winds tonight will remain under 25kts for intra-coastal and outer waters. Waters 25-60NM will see gusts around 25kts tonight, before diminishing Tuesday morning. Seas remain below small craft advisory levels over all waters through Tuesday night. Chance for some patchy overnight fog Tuesday night.

Small craft advisory level wind gusts possible Wednesday. Gales possible late week into the weekend. Building seas late week into the weekend.

CAR WATCHES/WARNINGS/ADVISORIES

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