Casco Bay Marine Forecast
| Tonight...Sw Winds 5 To 10 Kt With Gusts Up To 20 Kt, Diminishing To Around 5 Kt Late This Evening And Early Morning, Then Becoming W Late. Seas 2 To 3 Ft. |
| Sat...N Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 2 Ft. |
| Sat Night...S Winds 5 To 10 Kt. Seas Around 2 Ft. |
| Sun...S Winds 5 To 10 Kt, Increasing To 10 To 15 Kt With Gusts Up To 20 Kt In The Afternoon. Seas 2 To 3 Ft. |
| Sun Night...S Winds 5 To 10 Kt, Becoming Nw After Midnight. Seas 2 To 3 Ft. |
| Mon...N Winds 5 To 10 Kt, Becoming E In The Afternoon. Seas Around 2 Ft. |
| Mon Night...Se Winds Around 5 Kt, Becoming Ne After Midnight. Seas Around 2 Ft. |
| Tue...E Winds Around 10 Kt. Seas Around 2 Ft. Scattered Showers In The Afternoon. |
| Tue Night...Se Winds 5 To 10 Kt. Seas Around 2 Ft. Scattered Showers. |
| Wed...E Winds 5 To 10 Kt. Seas Around 2 Ft. Scattered Showers In The Morning. |
| Wed Night...S Winds 5 To 10 Kt. Seas Around 2 Ft. |
| Area Forecast Discussion National Weather Service Gray ME 702pm EDT Fri April 26 2024 Synopsis Winds turn southwesterly on Saturday with a warming trend expected over the weekend into early next week. A weak front will bring a few widely scattered showers Saturday night into Sunday. Monday will be warm away from the coast, with cooler temperatures along the coast where the sea breeze develops. Expect a better chance of showers on Tuesday along with much cooler temperatures. Near Term - Through Saturday 702 PMAnother exceptionally quiet evening underway locally with clear skies and a diminishing breeze. No updates of note apart from the usual tweaks to blends the forecast toward observations in the next couple of hours. Previously... Skies remain clear tonight as high pressure drifts overhead. This will again be a good night for radiational cooling given light to no winds and clear skies. Temps fall the best across the interior and mountains, with low to mid 20s in reach. For Saturday, high pressure will begin to slide east. This will provide a more directional wind for the day from the south. A bit more moisture transport is expected, so RH values will be low once again, but perhaps not as low as Friday. One concern for the day will be the temperature differential between air temp and area lakes, ponds, and streams. This can bring a lot of traffic to these areas for recreation purposes, but water temps below 50 degrees can cause cold water shock. Went ahead and highlighted a region for a Cold Water SPS, running from southern NH and into the Maine lakes region. This is where daytime highs should climb into the mid to upper 60s. Short Term - Saturday Night Cirrus should be moving in through the evening, with denser clouds coming towards midnight. Light rain showers will move into New Hampshire after midnight, although how far east they spread is uncertain. Amounts and low level moisture is limited, and dry air remains anchored in portions of Maine. Thus kept PoPs locked to Chance values and Quantitative Precipitation Forecast quite low. A wetting rain is doubtful at this point considering the remaining dry air. Long Term - Sunday Through Friday Overview: New England remains under a broad upper level ridge for the first part of the extended forecast period. The ridge begins to break down Tuesday as another weak disturbance looks to cross the region bring with it another chance of scattered showers. Another ridge than builds in for through Friday ahead of another frontal system late week. Impacts: * No significant weather impacts expected Details: Sunday looks to be mostly dry with some scattered showers potentially lingering in the north, but with an upper ridge still overhead and a much drier air mass moving in on northwest flow, any measurable precipitation is expected to be very light. Otherwise, skies look to be partly to mostly cloudy with high temperatures in the 60s with near 70 possible in southern New Hampshire. Onshore flow will keep coastal areas more in the mid 50s. Skies remain partly to mostly cloudy overnight as a backdoor front looks to drop in, so low temperatures only drop into the mid to upper 40s with the exception of southern New Hampshire which may stay warmer, in the lower 50s, with the added warm air advection. Monday will be the warmest day with 850mb temperatures approaching 10C , but we may still be contending with partly cloudy skies as the moisture gradient associated with the front looks sharp and may only clear out portions of eastern Maine. Depending on the timing of the front, high temperatures could be in the upper 60s in many places to near mid 70s in southern New Hampshire. I was inclined to bring these lows down just a couple degrees to account for any delays with respect to the movement of the front, but that still makes for a pleasant late April day. Tuesday will be considerably cloudier and cooler as low pressure passing to our north drags a series of fronts through the region. High temperatures look to only make the 50s as the upper ridge breaks down and shower chances return. The pattern remains unsettled as weak fronts continue to make a run at the region necessitating having chance showers in the forecast through the end of the week. A more organized system may be making an approach late on Friday associated with a more potent upper low, but with the level of uncertainty that far out, will stick with just chance scattered showers until more details can be extracted. Marine Short Term Below SCA (Small Craft Advisory) expected. Winds become more southerly as high pressure tracks east of the area into the middle of the weekend. Long Term Winds and seas remain below thresholds hazardous to small crafts through the period. Winds will primarily be out of the south other than a shift out of the north Monday evening into Tuesday morning as a front crosses the waters. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...None. NH...None. Marine None. |
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