Cape Elizabeth ME to Merrimack River MA Marine Forecast
|Tonight...S Winds 10 To 15 Kt With Gusts Up To 25 Kt, Becoming Sw With Gusts Up To 20 Kt After Midnight, Then Becoming W 5 To 10 Kt Late. Seas 2 To 3 Ft. Isolated Showers Late This Evening And Early Morning.|
|Thu...Nw Winds 5 To 10 Kt, Becoming S In The Afternoon. Seas 2 To 3 Ft.|
|Thu Night...Sw Winds 5 To 10 Kt. Seas Around 2 Ft.|
|Fri...S Winds 5 To 10 Kt, Increasing To 15 To 20 Kt In The Afternoon. Seas 2 To 4 Ft.|
|Fri Night...S Winds 15 To 20 Kt, Becoming Sw 10 To 15 Kt After Midnight. Gusts Up To 30 Kt. Seas 3 To 5 Ft. A Chance Of Showers After Midnight.|
|Sat...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 4 Ft. Showers Likely, Mainly In The Morning.|
|Sat Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt, Becoming W 5 To 10 Kt After Midnight. Seas 2 To 4 Ft. A Chance Of Showers In The Evening.|
|Sun...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 2 Ft.|
|Sun Night...Sw Winds 5 To 10 Kt, Becoming W After Midnight. Seas Around 2 Ft.|
|Mon...Sw Winds 5 To 10 Kt. Seas Around 2 Ft.|
|Mon Night...Sw Winds 10 To 15 Kt. Seas Around 2 Ft.|
| Area Forecast Discussion|
National Weather Service Gray ME
407pm EDT Wednesday Jun 29 2022
A quick- hitting round of showers crosses tonight, drying out for Thursday which will be similarly warm compared with today. Friday will be hot, with humidity and shower chances creeping up into Saturday. Drier and more seasonable conditions return during the second half of the weekend, with high pressure providing quiet weather into early next week.
.NEAR TERM /UNTIL THURSDAY MORNING/... A weak frontal boundary will sweep through the area this evening bringing scattered showers and some possible thunderstorms as the boundary converges with this afternoon's sea breeze around the foothills. The main lifting mechanisms come into play late this evening which will keep most storms as weaker cells with the lack of instability. Mid-level lapse rates aren't particularly steep with CAPE values around 500 J/kg indicating a more sub-severe thunderstorm environment. The Storm Prediction Center maintains a marginal risk from southwestern NH to northeastern ME excluding the coastal areas for stronger thunderstorms tonight with damaging winds as the main hazard. Skies will quickly clear up after the front passes with some lingering showers in the mountains possible into the morning.
.SHORT TERM /THURSDAY MORNING THROUGH THURSDAY NIGHT/... After the showers pass overnight some fog may develop along the midcoast up into the Penobscot Valley, and in the upper Connecticut River Valley. Clearing skies and warming temperatures set in tomorrow with highs building into the low to mid 80s for most areas south of the mountains. Winds will calm down throughout the afternoon from the northwest, shifting to the southwest in the evening through Friday. The environment will be drier tomorrow night inhibiting fog formation.
Long Term - Friday Through Wednesday
The 500 MB pattern across NOAM and environs continue to rend toward the coolest air shifting poleward and and overall warming pattern across NOAM. However, persistent troughing over eastern Canada and NE CONUS hold off extended heat, but temps should average near normal, keeping in mind we are heading into the warmest part of the summer. No real precipitation events in the forecast with just some chances for SHRA/TSRA.
The hottest day in the forecast will be Friday as close low shift SE from Hudson Bay to James Bay, and builds up ridging and SW flow aloft. This should push near 20C air in at 850 MB, with generally sunny skies and good SW flow near the sfc. This will push highs to 90-95 across central and southern Maine and in the upper 80s in much of the rest of the interior. S of Casco Bay along the coast highs should make into the mid to upper 80s as flow will turn parallel to the coast making it a touch less warm. And on the mid coast should see highs 75-80 in the SW flow, but likely cooler right at the shore. For the most part, Tds will stay in the upper 50s to low 60s, which keep the apparent T close to, or even a little below air temps, so for now, should stay out of heat advisory range. There’s a alight chance for a stray shower over the mountains Friday afternoon.
Friday night will see cold front begin to approach from the west, but ridging will be slow to break down, so, any showers ahead of the front will likely hold off until after midnight, except for the mountains. If there was no expectation of rain mins would probably not fall below 70 across much of the southern CWA, but with the potential for showers and possibly thunderstorms almost everywhere before daybreak, and thus some wet bulb cooling, mins are in the low 60s in the mtns , to the mid to upper 60s elsewhere.
Saturday morning will see that first band of showers move off shore, as the front slows crossing the mtns. Another round of showers and storms may be possible in southern NH and the coastal plain of ME, as low level moisture pools here ahead of the surging cold front. The mountains should wee some clearing in the afternoon, and the coast may see some sun before another line of showers moves in during the afternoon. Showers end Sunday night, and it should cools down into the mid 50s to low 60s.
Sunday and Monday will see RH drop off but temps still seasonably warm, mostly in the upper 70s to mid 80s, and generally fair conditions.
SCA (Small Craft Advisory) may be needed Fri into Fri night in freshening SW flow.
NOAA Gray/Portland ME Office - Watches - Warnings - Advisories