Marine Weather Net

Penobscot Bay Marine Forecast


TODAY

NW
WINDS
15 - 20
KNOTS

TONIGHT

W
WINDS
5 - 10
KNOTS

TUE

S
WINDS
10 - 15
KNOTS

TUE NIGHT

S
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
ANZ151 Forecast Issued: 224 AM EDT Mon Apr 22 2024

Today...Nw Winds 15 To 20 Kt With Gusts Up To 25 Kt, Diminishing To 10 To 15 Kt With Gusts Up To 20 Kt This Afternoon. Seas 2 To 3 Ft.
Tonight...W Winds 5 To 10 Kt, Becoming Sw After Midnight. Seas Around 2 Ft In The Evening, Then 1 Foot Or Less.
Tue...S Winds 10 To 15 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft.
Tue Night...S Winds 10 To 15 Kt. Seas 2 To 3 Ft.
Wed...S Winds Around 10 Kt With Gusts Up To 20 Kt. Seas 2 To 4 Ft. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon.
Wed Night...Nw Winds 15 To 20 Kt, Increasing To 20 To 25 Kt After Midnight. Seas 2 To 4 Ft. Showers Likely In The Evening. A Chance Of Snow Showers. Vsby 1 Nm Or Less.
Thu...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt In The Afternoon. Gusts Up To 30 Kt. Seas 2 To 4 Ft.
Thu Night...Nw Winds 5 To 10 Kt. Seas 2 To 3 Ft.
Fri...Nw Winds 5 To 10 Kt, Becoming Sw In The Afternoon. Seas Around 2 Ft.
Fri Night...Sw Winds 5 To 10 Kt. Seas Around 2 Ft.
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Area Forecast Discussion
National Weather Service Gray ME
304am EDT Monday April 22 2024

Synopsis
A dry and breezy day is expected today. High pressure slides south of the area Tuesday for warmer and dry conditions. Low pressure approaches the region Wednesday bringing the next chance for rain. High pressure then builds in towards the end of the week. A warming trend can be expected over the weekend.

Near Term - Until 6pm This Evening
A cold front is currently crossing the forecast area with little in the way of precipitation except for a few snow showers in the mountains. A drier air mass will move into the area behind the front this morning on breezy NW winds. These winds will gust to around 20-25 mph from mid morning into early afternoon before relaxing as high pressure builds in. The dry airmass will lead to elevated fire weather conditions as min RH drops into the teens to 20 percent range, although winds will be on the downward trend as these min RH values are realized. Otherwise, it will be a sunny day with highs ranging from upper 30s near the Canadian Border to the mid 50s across the south.

Short Term - 6pm This Evening Through 6pm Tuesday
High pressure moving near overhead tonight will lead to clear skies and light winds bringing favorable radiational cooling. Have incorporated MOS guidance into the low temperature forecast with lows dropping below freezing across much of the area with favorable radiational cooling spots dropping to near 20 degrees.

Highs pressure shifts southeast of the area Tuesday while still providing mostly fair weather. Southerly winds will increase through the day and these onshore winds will keep coastal areas and central Maine in the 50s for highs. Across much of the New Hampshire highs will climb into the low to mid 60s.

Long Term - Tuesday Night Through Sunday
Showers will begin to enter the region from the northwest late Tuesday night as a cold front pushes arrives out of Canada. Deterministic models and ensemble solutions suggest a wave of low pressure will form along this front on Wednesday. Thermal profiles suggest rain showers will change to snow showers during the day over central and northern areas as colder and drier air arrives behind the front. Scattered snow showers can be expected in all areas before the precipitation ends Wednesday evening.

There will be a relatively large swing in temperatures Wednesday. Daytime highs will be in the upper 40s to mid 50s in most areas. Wednesday night, overnight lows will fall into the upper teens to mid 20s by morning in a cold air advection pattern.

Mostly sunny and dry conditions will end out the work week as high pressure builds into the region from Canada. There will be a slight warming trend by Friday with readings mostly in the 50s with lower 60s over southern New Hampshire.

The large ridge of high pressure will move off the Eastern Seaboard this weekend allowing a return flow of mild southwesterly air to the region. Temperatures will continue to moderate with readings reaching the 60s during the afternoon hours. Slightly cooler temperatures can be expected along the Midcoast region of Maine as winds may become onshore off of the chilly Gulf of Maine waters.

Scattered showers can be expected on Sunday as another frontal system approaches from the west.

Marine
Short Term
A cold front crossing the waters this morning will bring a period of NW winds to 25 kts into early afternoon before relaxing into tonight as high pressure builds in. High pressure moves east of the waters Tuesday with southerly winds approaching 25 kts by Tuesday afternoon.

Long Term
Winds will increase from the south on Tuesday night into Wednesday potentially reaching SCA (Small Craft Advisory) levels. Winds switch to the northwest in a cold air advection pattern Wednesday evening. SCA thresholds will likely be reaching during that time period and continue through Thursday.

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

Marine
Small Craft Advisory until 2pm EDT this afternoon for ANZ150- 152-154.