Area Forecast Discussion
Issued by NWS Caribou, ME
Issued by NWS Caribou, ME
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650 FXUS61 KCAR 221425 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 925 AM EST Fri Nov 22 2024 .SYNOPSIS... Low pressure will lift toward the region today into Saturday, then exit across the Maritimes Sunday. High pressure builds toward the region Monday. Low pressure approaches from the west Tuesday. && .NEAR TERM /THROUGH TONIGHT/... 925AM Update: No major changes to the forecast for this update. Will keep an eye on the waters for changes in winds and waves. Previous Discussion... Vertically stacked surface/upper level low pressure will remain across the Mid-Atlantic region today. Energy rotating around the upper low will help support the development of a new low east of New England. The new low will lift toward Nova Scotia tonight, while the vertically stacked system drifts east. An area of rain will lift north across the forecast area today. Could also have patchy fog this morning, mostly Downeast. Northeast/east winds will gust to 25 to 30 mph today. Rain chances should briefly diminish early tonight, along with patchy drizzle. Another area of rain lifting north with the new low approaching Nova Scotia will then expand across the region overnight with rain chances again increasing. High temperatures today will range from around 40 to the lower 40s north, to the mid to upper 40s Downeast. Low temperatures tonight will range from the mid to upper 30s north, to around 40 Downeast. && .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... 500 MB low moves northeast toward Nova Scotia by late day Saturday. It is then forecast to slowly rotate across the Canadian Maritimes Saturday night into Sunday. Weak areas of low pressure are expected to rotate across the Canadian Maritimes around the upper low through early Sunday before slowly tracking east of Nova Scotia east later Sunday afternoon. Moisture will continue to increase across the region during Saturday as Atlantic moisture wraps westward around the surface/upper level lows. Expect rain to continue during much of the day Saturday. The pressure gradient remains rather tight between the Maritimes low and high pressure across Labrador. This will result in a continued brisk and gusty north to northeast wind across the region on Saturday. Thus, trimmed a couple degrees off the NBM numbers for highs. Expect highs across the north not to rise much above the upper 30 to around the 40 degrees, with low to mid 40s elsewhere. Saturday night models indicate the deeper moisture begins to exit to the east with precipitation becoming more showery for the Bangor region and Downeast areas. However, moisture will continue to wrap back across northern areas around the Maritimes low. Critical thickness values suggest it should be cold enough for rain to transition to snow across northern areas, especially the higher terrain. Some accumulation is likley Saturday night north of the Katahdin region, with an inch or two accumulation not out of the question. A few snow showers will be possible all the way down to the coast by daybreak Sunday. The surface and upper level lows continue to slowly exit east of the Canadian Maritimes during Sunday. Expect continued mainly cloudy skies, with scattered snow and rain showers expected, mainly across northern areas. Afternoon highs are expected to be close to normal in the upper 30s across the north and lower 40s for the Bangor region and Downeast. But the gusty northwest wind will make it feel a bit cooler. && .LONG TERM /MONDAY THROUGH THURSDAY/... Sunday night and Monday the Canadian Maritimes low finally moves east. Still could be a few lingering snow showers across the north through Sunday evening, otherwise expect partly to mostly cloudy skies Sunday night. On Monday, brief ridging both at the surface and aloft will bring dry weather with partly to mostly cloudy skies. Low pressure from the Great Lakes region moves east Monday night with increasing clouds. This system crosses the region on Tuesday with the chance for rain or snow. Drier conditions are expected on Wednesday behind that system. At the moment, the forecast for Thanksgiving Day is somewhat uncertain. Longer range guidance does suggest the potential for a storm developing somewhere along the east coast for the latter half of the Thanksgiving week. This could have impacts on the weather across our area during the second half of the upcoming Holiday week. If you have travel plans, please continue to monitor the latest forecasts. Afternoon highs will be close to normal for this time of year. && .AVIATION /15Z FRIDAY THROUGH TUESDAY/... NEAR TERM: Generally MVFR/IFR conditions expected across the region today through tonight, though local LIFR conditions also possible tonight. Rain today through tonight. Northeast/east winds 10 to 20 knots with gusts 25 to 30 knots, decreasing to 10 to 15 knots with gusts up to 20 knots today. Northeast/north winds 10 to 15 knots with gusts up to 20 knots tonight. Easterly low level wind shear across northern areas this morning into early afternoon, and across Downeast areas this morning. Northeasterly low level wind shear could then begin to develop again Downeast late tonight. SHORT TERM: Saturday...Widespread MVFR/IFR. Rain. N to NE wind 15 to 25 kt with G35kt. Saturday night....MVFR/IFR at the Aroostook terminals in -SN/-RASN, MVFR/VFR for KBGR/KBHB. Gusty N to NW wind. Sunday...MVFR/VFR. Scattered -SHSN north. Gusty NW wind. Sunday night through Monday...VFR. Tuesday...MVFR or lower in rain or snow. && .MARINE... NEAR TERM: Have cancelled the Gale Warning and replaced with a Small Craft Advisory in effect through 7 PM for much of the waters, with the exception of the intra-coastal waters. A Small Craft Advisory is in effect for the intra-coastal waters through 11 AM this morning. Rain and patchy fog today through tonight. SHORT TERM: Small craft advisory conditions are expected Saturday. Gale force wind gusts are possible Saturday night through Sunday night. Conditions should decrease below small craft levels Monday and Tuesday. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...Small Craft Advisory until 7 PM EST this evening for ANZ050- 051. Small Craft Advisory until 11 AM EST this morning for ANZ052. && $$ Near Term...LaFlash/Norcross Short Term...TWD Long Term...TWD Aviation...LaFlash/Norcross/TWD Marine...LaFlash/Norcross/TWD