Area Forecast Discussion
Issued by NWS Caribou, ME

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948 FXUS61 KCAR 100744 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 344 AM EDT Fri May 10 2024 .SYNOPSIS... High pressure builds across the region through Saturday night. A warm front approaches Sunday, then lifts to the north Sunday night and Monday. A storm system approaches from the west Monday night and Tuesday. && .NEAR TERM /THROUGH TONIGHT/...
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A surface ridge of high pressure will slowly move into the forecast area from the west through the day today. Mostly clear skies will continue through the early morning hours, before diurnal heating leads to the development of a cumulus field through the afternoon. Additionally, some high level cirrus are beginning to make their way into the southern portion of the forecast area early this morning, and may also lead to an increase in cloud cover through the afternoon. Cumulus this afternoon could contain a few isolated rain showers, but with a lack of deep mid-level moisture, the chance for these showers is low (10%), and any showers that do form will likely not result in measurable precipitation. With the lack of cloud cover through the first half of the day, temperatures will make a run for 60 this afternoon. Tonight, temperatures will fall into the mid to upper 30s.
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&& .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...
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The surface level trof should keep the low pressure to the south over the waters on Saturday. RH models show the clouds building in early making for a mostly cloudy day. This with the cold pool should keep temps in the mid 50s across the region. By the afternoon, upper air model soundings show instability developing with lower CAPE values, but steep lapse rates. Nevertheless, the warm air in the mid levels and the lack of cool air to advect into the atmosphere, the chance of thunderstorms is unlikely. Scatter showers are expected through the afternoon and evening. By Saturday night, the upper level trof over the Great Lakes will slowly move E. Clouds should keep temps from in the upper 30s. By Sunday, shortwave energy from the SW is expected to move into the region bringing more moisture. The afternoon will bring more instability, but the lack of lift will only bring convective showers. By Sunday night, weak high pressure move in late to help make for partly cloud skies.
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&& .LONG TERM /MONDAY THROUGH THURSDAY/...
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A developing occlusion is excepted to move across Canada with the triple point over New England on Monday and progress across the region through Tuesday. The warm sector of the occlusion and the warm front to the south is expected to bring a warming trend throughout next week. Showers are expected on Tuesday and into Wednesday. As the front moves through the area, there is a slight chance for thunderstorms on Wednesday, but lack of confidence in the timing of the track kept thunderstorms out of the forecast for the time being. High pressure should return by the end of the week.
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&& .AVIATION /07Z FRIDAY THROUGH TUESDAY/...
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NEAR TERM: SKC to continue through the early morning, with cigs remaining VFR through the day today even as afternoon cumulus develop. Winds NE at 5 to 10 kts through the afternoon. Cigs will likely remain VFR into Friday night with winds becoming light and variable once more, though increasing cloud cover from the south and east could lower towards MVFR late. SHORT TERM: Sat...Mainly VFR. Possible MVFR in rain showers. Light E winds. Sat night...VFR. Light ENE winds. Sun-Sun night...Mainly VFR. Possible MVFR in afternoon rain showers. Light and variable winds. Mon-Tue...MVFR in rain showers. S winds 5-15 kts.
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&& .MARINE...
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NEAR TERM: Winds and seas will remain below small craft advisory levels through tonight. Highest wind gusts may approach 20 kts briefly on the coastal waters this afternoon. SHORT TERM: Winds and seas should remain below SCA conditions through this time period.
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&& .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...None. && $$ Near Term...AStrauser Short Term...LaFlash Long Term...LaFlash Aviation...AStrauser/LaFlash Marine...AStrauser/LaFlash