Stonington ME to Port Clyde ME Marine Forecast
|Today...Ne Winds 5 To 10 Kt, Increasing To 10 To 15 Kt With Gusts Up To 20 Kt This Afternoon. Seas 2 To 4 Ft. Patchy Fog This Morning. A Chance Of Tstms. A Chance Of Showers. Some Tstms May Produce Gusty Winds And Heavy Rainfall. Vsby 1 To 3 Nm.|
|Tonight...Ne Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 4 Ft. A Chance Of Showers. Vsby 1 To 3 Nm In The Evening.|
|Wed...N Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt In The Afternoon. Seas 2 To 4 Ft.|
|Wed Night...Ne Winds 5 To 10 Kt. Seas 2 To 3 Ft.|
|Thu...Ne Winds 5 To 10 Kt, Becoming E In The Afternoon. Seas 2 To 3 Ft.|
|Thu Night...S Winds Around 5 Kt. Seas Around 2 Ft.|
|Fri...S Winds 5 To 10 Kt. Seas 2 To 3 Ft. A Chance Of Showers And Tstms.|
|Fri Night...Sw Winds 5 To 10 Kt. Seas 2 To 4 Ft. A Chance Of Showers And Tstms.|
|Sat...Sw Winds 5 To 10 Kt. Seas 2 To 4 Ft.|
|Sat Night...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft. Winds And Seas Higher In And Near Tstms.|
Area Forecast Discussion|
National Weather Service Gray ME
257am EDT Tuesday July 14 2020
A trough of low pressure crosses New England today accompanied by showers and a few thunderstorms, some containing torrential downpours. A ridge of high pressure gradually builds in from the north on Wednesday. Temperatures and humidity will increase toward the end of the week with showers and storms returning.
Near Term - Through Today
At 06z...GOES water vapor imagery showed an evolving upper low vicinity of the Adirondacks...in good agreement with short term model guidance. NWS Doppler Radar mosaic showed scattered convection pivoting around this feature at moment. Across the forecast area at moment...skies were scattered to broken with some patchy stratus and fog developing. For today...the upper low will meander east across our area and be centered along mid coast Maine by early evening. Scattered convection will gradually increase through dawn with the approach of this feature. Daytime heating combined with the upper low and cold air aloft will result in widespread convection developing by mid or late morning. Modified soundings support up to 1200 j/kg today... and also suggest we'll see a few pulse storms with gusty winds and possibly small hail. The weak flow aloft will make convection slow-moving...and where we see repeat convective cells today the potential for flooding and localized flash flooding will exist.
.SHORT TERM /TONIGHT THROUGH 6pm WEDNESDAY/... Convection should rapidly decrease in coverage this evening with loss of heating and the upper low sliding offshore. Overnight...we'll see mostly cloudy skies with patchy fog developing and a low chance for a lingering shower. On Wednesday...a surface ridge will gradually nose in from the north with drier air. Over far southern and western sections...there may be enough leftover moisture for a brief pop up shower through mid afternoon.
Long Term - Wednesday Night Through Monday
Fore fro 500 MB across NOAM shows the building of a broad ridge that covers the southern two thirds of the conus with mostly zonal flow across the northern tier this weekend into next week. This will mean hot weather returns , and with the stronger flow aloft, a better chance for shallow waves to move thru and produce convection.
Will start off the forecast period with a cooler surface ridge nosing down from maritimes. this will being manly clear skies and light winds producing a seasonably cool night with lows in the low to mid 50s many inland areas, and upper 50s to around 60 on the coast and in southern NH. Thursday should be fair with highs running a little below normal, generally in the mid 70s to low 80s. Cirrus moves in during the afternoon.
500 Mb closed low then tracks well to the N and W of the CWA, but break down the ridge and start to transport warmer air loft. The warm air advection will spread clouds and bring the the showers Thu night into Friday, Will see a fair mtn of clouds during the day as well, with highs again mainly in the 70s to around 80. Once this system moves thru will see mainly zonal W flow aloft over the weekend becoming SW next week, and 850 MB temps Sunday and Monday will approach 20C. Humidity will gradually increase as well thru the period and may see dangerous heat levels again by Sunday and Monday. Given the locations on the equatorward side of the 500 MB jet, and the very unstable surface conds, any weak waves in the flow aloft could produce a round of convection.
Short Term /Through Wednesday/...Winds and seas will increase in northeast flow into tonight...but should remain below SCA (Small Craft Advisory) threshold.
Long Term...Winds/seas stay below SCA (Small Craft Advisory) levels Thu-Sat.
NOAA Gray/Portland ME Office - Watches - Warnings - Advisories
ME...None. NH...None. MARINE...None.