Marine Weather Net

Port Clyde ME to Cape Elizabeth ME Marine Forecast


REST OF TONIGHT

S
WINDS
5 KNOTS

SAT

SE
WINDS
5 KNOTS

SAT NIGHT

SW
WINDS
5 KNOTS

SUN

SW
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
ANZ152 Forecast Issued: 937 PM EDT Fri Aug 07 2020

Rest Of Tonight...S Winds Around 5 Kt, Becoming E Late. Seas Around 2 Ft. Patchy Fog Late. Vsby Variable To Less Than One Quarter Nm Late.
Sat...Se Winds Around 5 Kt. Seas Around 2 Ft. Patchy Fog In The Morning. Vsby Variable To Less Than One Quarter Nm In The Morning.
Sat Night...Sw Winds Around 5 Kt. Seas Around 2 Ft.
Sun...Sw Winds 5 To 10 Kt. Seas Around 2 Ft.
Sun Night...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft. A Chance Of Showers In The Evening.
Mon...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft.
Mon Night...S Winds 5 To 10 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft.
Tue...S Winds 10 To 15 Kt. Seas 2 To 4 Ft.
Tue Night...Sw Winds 10 To 15 Kt. Seas 3 To 4 Ft.
Wed...Sw Winds 10 To 15 Kt. Seas 3 To 4 Ft.
Wed Night...Sw Winds 5 To 10 Kt, Becoming W After Midnight. Seas 3 To 5 Ft.
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Area Forecast Discussion
...UPDATED National Weather Service Gray ME
941pm EDT Fri August 7 2020

Synopsis
Weak high pressure keeps the weekend mostly dry but unsettled conditions loom nearby so can't rule out isolated to scattered rain showers this weekend. Otherwise the forecast period will be highlighted by increasing heat and humidity into next week with occasional chances for showers and thunderstorms, especially mid next week.

Near Term - Through Saturday
940 PM Forecast is in good shape and have made a few minor changes to lower Probability of Precipitation across southern NH based on radar imagery. At this point the lower atmosphere is still moistening and will take most of the overnight hours to saturate before any precipitation can fall. Temperatures are on track for lows in the low/mid 50s north to the lower 60s south.

615 PM Cumulus clouds are slowly dissipating this evening, and temperatures in the 70s and dew points in the 50s are making for a pleasant summer night. Clear skies will allow for fog to develop in some spots before increasing cloud cover arrives overnight from the southwest. Still looks like we may get a sprinkle towards early morning over southern NH, but for ME and the remainder of NH any precipitation should hold off until after sunrise.

Previous discussion... Weak high pressure at the surface keeps the bulk of the area dry for the majority of the time... the fly in the ointment is occasional light shower activity associated with a stationary front draped to our south. A shortwave aloft crosses tonight with isolated showers mainly over southern and western zones though best chances remain to our south closer to the front. At the same time the high pressure center shifts into the maritimes increasing onshore flow. With increasing humidity have increasing chances for fog and stratus development tonight. Stratus is favored more over southern interior zones where moisture depth is greatest and extant clouds prevent much cooling tonight while patchy river valley fog is favored elsewhere. Along the coast may be a mixed bag of low clouds and fog depending on elevation. Otherwise lows will be in the 50s to low- 60s over the area.

Short Term - Saturday Night
Saturday will remain generally unsettled with isolated rain shower activity turning scattered over the higher terrain during the afternoon. Steepening lapse rates behind the departing shortwave trough introduces some chance of thunderstorms, but convection will likely struggle in the afternoon with a warm nose remaining above about h700 as well as subsidence behind the trough, relying on surface destabilization instead. Nonetheless have included a slight chance of thunder starting in the west during the mid- morning hours, expanding east by mid-day. Am expecting fairly widespread cumulus to stratocu clouds tomorrow so am not expecting surface destabilization to be particularly strong in most places; breaks in the clouds may lead to somebody, somewhere getting enough surface warming to Probability of Precipitation a thunderstorm.

For temperatures, onshore flow limit warming within a few miles of the coast to the 70s while the interior warms into the low- 80s...possibly into the mid-80s with more sunshine. Precipitation tapers down quickly with sunset and with ridging moving in from the west. Humidity will remain on the higher side, limiting low temperatures to the 50s and 60s.

Long Term - Sunday Through Friday
Building heat and humidity will be the main theme during the extended portion of the forecast. Occasional weak disturbances will cross the region through the period as well which could deliver brief periods of widely scattered showers and thunderstorms. The first chance will be on Sunday, but with weak forcing for ascent any thunderstorm activity will be isolated during the afternoon and early evening hours. On Tuesday, western zones stand the best chance at experiencing a a shower and thunderstorm as well. Better chances of more widespread shower and thunderstorm activity will be Wednesday and/or Thursday when more significant height falls are possible based on the latest ensemble guidance. The combination of temperatures and increasing dew point values may lead to the possibility of some zones needed a heat advisory during the Mon-Wednesday timeframe.

Marine
Short Term /Through Saturday night/...All remains quiet over the waters through the first half of the weekend with weak high pressure settling east over the Canadian Maritimes. Seas and winds remain below SCA (Small Craft Advisory) thresholds.

Long Term...Winds and seas will remain below SCA (Small Craft Advisory) thresholds with the exception of possibly a few gusts near 25 knots and seas Tuesday night into Thursday.

NOAA Gray/Portland ME Office - Watches - Warnings - Advisories
ME...None. NH...None. MARINE...None.