Cape Elizabeth ME to Merrimack River MA Marine Forecast
| Today...Se Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt Late This Morning And Afternoon. Seas 6 To 7 Ft. Wave Detail: E 7 Ft At 10 Seconds. Patchy Dense Fog Early This Morning. Isolated Tstms Early This Morning. Rain Until Late Afternoon, Then A Chance Of Showers Late. Vsby 1 Nm Or Less Early This Morning. |
| Tonight...Nw Winds Around 5 Kt, Increasing To 5 To 10 Kt After Midnight. Seas 6 To 7 Ft. Wave Detail: E 6 Ft At 10 Seconds. A Chance Of Showers In The Evening. |
| Fri...W Winds Around 10 Kt With Gusts Up To 20 Kt, Becoming Sw In The Afternoon. Seas 5 To 6 Ft. Wave Detail: E 5 Ft At 10 Seconds. |
| Fri Night...W Winds 5 To 10 Kt. Seas 4 To 5 Ft. Wave Detail: E 5 Ft At 9 Seconds. |
| Sat...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 4 Ft. Wave Detail: E 4 Ft At 9 Seconds. |
| Sat Night...S Winds 5 To 10 Kt, Becoming Nw After Midnight. Seas 3 To 4 Ft. Wave Detail: Se 4 Ft At 9 Seconds. A Chance Of Showers. |
| Sun...N Winds 5 To 10 Kt. Seas 3 To 4 Ft. A Chance Of Showers. |
| Sun Night...W Winds Around 10 Kt With Gusts Up To 20 Kt. Seas Around 3 Ft. |
| Mon...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt, Becoming S 15 To 20 Kt With Gusts Up To 30 Kt In The Afternoon. Seas 2 To 4 Ft. |
| Mon Night...S Winds 15 To 20 Kt With Gusts Up To 30 Kt. Seas 3 To 4 Ft. Winds And Seas Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Gray ME 640am EDT Thu April 30 2026 .WHAT HAS CHANGED... Little change to the previous forecast, if anything rainfall totals have trended down as precipitation is looking more showery and moving faster thru the region today. .KEY MESSAGES... 1. Beneficial rain expected for the majority of the forecast area today. 2. A cool pattern persists through the weekend and into early next week with chances for showers. KEY MESSAGE 1 DESCRIPTION... Moist onshore flow is resulting in areas of drizzle with embedded rain showers. With showers becoming more widespread I allow the character of precipitation to move away from drizzle from this point forward in the forecast. So far visibility has been behaving but patchy fog will be possible thru morning as well. Rainfall will begin to creep into southwestern NH over the next hour and steadily progress eastward thru morning. Forecast soundings continue to show elevated instability, so in addition to a rumble of thunder some of the rainfall rates may be briefly heavy. Despite that this is mostly a beneficial rainfall given both the long and short term dryness. Currently 6 hr flash flood guidance is generally between 2.5 and 3 inches. Looking at the latest HREF, the max Quantitative Precipitation Forecast over the next 24 hours is 2.5 to 3 inches. Latest convection allowing guidance has trended much more showery however, so rainfall totals may ultimately come in well below that potential. So we should be able to handle this amount of rainfall without much trouble. The heaviest rain will be during the morning, and begin to clear southwestern NH during the afternoon. Showers, especially in the higher terrain may linger thru much of tonight. KEY MESSAGE 2 DESCRIPTION... The cool pattern looks to persist through the weekend and into early next week as a trough deepens across the Northeast and Great Lakes. This brings daytime highs mainly in the 40s across the north, and 50s south of the mountain. With cold air aloft associated with the trough, instability showers and an increase in cloud cover are likely each afternoon, especially across the higher terrain. A coastal storm tracking offshore on Sunday has trended a bit further west since yesterday, bringing a steadier shield of rain closer to the coast. Should this westward trend continue, a steadier round of rain would be expected, so it's worth monitoring over the coming model runs. After Sunday, the next chance for showers would come on Tuesday as the next shortwave rotating around the trough approaches from the west. Marine Northeast winds gradually turn southerly thru morning and increase. SCA (Small Craft Advisory) gusts are possible for all waters before they diminish. SCA (Small Craft Advisory) conditions continue overnight for the coastal waters and outer Casco Bay as seas remain above 5 feet. Patchy fog will also be possible thru this morning along with briefly heavy rainfall during the day. Seas likely settle below 5ft by Saturday morning. Broad high pressure builds across the waters into Saturday. A deepening low pressure system likely tracks outside the Gulf of Maine on Sunday. Southerly flow then freshens early next week with SCA (Small Craft Advisory) conditions possible by Monday night ahead of an approaching cold front. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...None. NH...None. Marine Small Craft Advisory until 8am EDT Friday for ANZ150-152>154. Small Craft Advisory until 8pm EDT this evening for ANZ151. |
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