
Penobscot Bay Marine Forecast
Today...W Winds 25 To 30 Kt With Gusts Up To 40 Kt. Seas 3 To 5 Ft. Wave Detail: S 4 Ft At 9 Seconds. Heavy Freezing Spray. |
Tonight...W Winds 20 To 25 Kt, Becoming Nw 15 To 20 Kt After Midnight. Seas 2 To 4 Ft. Wave Detail: Nw 2 Ft At 2 Seconds And S 2 Ft At 8 Seconds. Moderate Freezing Spray. |
Wed...Nw Winds 10 To 15 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 2 Ft At 2 Seconds. Light Freezing Spray. |
Wed Night...Nw Winds 5 To 10 Kt. Seas Around 2 Ft In The Evening, Then 1 Foot Or Less. Light Freezing Spray. |
Thu...N Winds 5 To 10 Kt. Seas 1 Foot Or Less. Light Freezing Spray In The Morning. |
Thu Night...N Winds 10 To 15 Kt, Increasing To 15 To 20 Kt After Midnight. Seas 1 Foot Or Less, Then Around 2 Ft After Midnight. Light Freezing Spray After Midnight. |
Fri...Nw Winds Around 15 Kt With Gusts Up To 25 Kt. Seas Around 2 Ft. Light Freezing Spray In The Morning. |
Fri Night...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt After Midnight. Seas Around 2 Ft. Light Freezing Spray. |
Sat...Nw Winds 5 To 10 Kt. Seas Around 2 Ft. Light Freezing Spray In The Morning. |
Sat Night...W Winds 5 To 10 Kt. Seas 1 Foot Or Less. |
Area Forecast Discussion National Weather Service Gray ME 347am EST Tuesday Feb 18 2025 Synopsis Cold high pressure builds in early this week with gusty winds continuing today. Winds gradually ease tonight as high pressure extends into New England. Low pressure likely passes well south of New England on Thursday. High pressure continues to gradually build in during the weekend with a moderating trend. Near Term - Until 6pm This Evening Another windy day is in store for today, but winds won't be quite as strong as yesterday. Westerly gusts generally look to be in the 40- 50 mph range in most areas today. The strongest gusts are expected across the Lakes Region and southern portions of New Hampshire, as well as across York county in Maine. Areas east of and downwind of the White Mountains are not expected to see as strong of winds as areas further south, but gusty conditions are still expected. The mountains and higher terrain remain windy again as well. Wind chills have dipped below -20 across northern locations in the cold weather advisory areas, with these conditions expected to continue through mid morning. Wind chills only rise slightly into the negative teens during the daytime in these areas as temperatures hold in the low single digits. Scattered upslope snow showers continue in these areas again today, with an uptick in activity expected for this afternoon as an area of increases low level moisture arrives. Elsewhere, wind chills spend the day ranging from the low single digits to below zero, with highs struggling to reach the low 20s along the coast where the most sunshine is expected. Short Term - 6pm This Evening Through 6pm Wednesday Winds gradually ease through the overnight tonight, but wind chills likely flirt with -20 degrees again across northern areas this evening. As winds ease, pockets of radiational cooling are expected to develop tonight, bringing lows below zero. The best chance for this looks to be downwind of the Whites into the Fryeburg and Lewiston areas. Northern valleys also see some of the colder lows deeper into the cold airmass, but winds likely take longer to relax in these areas tonight. Elsewhere, temps are expected to dip into the single digits across the area. Temperatures start to warm a little more tomorrow as high pressure reaches it's maximum influence for the week. The high remains centered across the Northern Plains, keeping a cool westerly flow ongoing. But with a bit of airmass modification and increased sunshine, temps warm into the mid to upper 20s downwind of the mountains, with teens expected across the north. Upslope snow shower activity also looks to be more isolated tomorrow as drier air moves through during the day. Long Term - Wednesday Night Through Monday 1110 PM...Long term update include little in the way of changes as we see quiet period through the weekend, as coastal systems pass or develop too far S and E to have to have much impact. Could still some SHSN in the S late Thu or thu night, but chances are low. Also, some mountain snow showers possible on Sat as a weak wave aloft passes to our N, but that about it. Otherwise expecting a very gradual warming trend start Wednesday and continuing through the weekend. Previously... Pattern Overview: A brief ridge builds in Wednesday before a 500mb low approaches on Thursday. This will attempt to phase with surface low pressure in the Atlantic, but a little late for any significant precipitation. A few shortwaves rotate through on Friday and Saturday, as well as a more prominent trough on Sunday, but a lack of synoptic forcing and moisture looks to preclude any precipitation. We may see another coastal system approach for the first part of next week. Impacts and Key Messages: * The pattern looks quieter through the weekend as global models trend toward a miss from a winter storm on Thursday, but some snow reaching our area can't be ruled out. Details: Wednesday: Surface high pressure noses into the area on Wednesday which should bring an end to any ongoing shower activity in the mountains. It will also bring mostly sunny skies to a majority of the area. This combined with some weak warm air advection aloft should allow temperatures to warm into the upper 20s south of the mountains by the afternoon. The only exception is Western New Hampshire as clouds will be moving in from the west, and may limit that area to the low 20s. North of the mountains look to top out in the mid to upper teens. Timing of the thicker clouds will effect low temperatures Wednesday night and the current progression keeps things clear enough to drop areas south of the mountains into the low single digits. North of the mountains, which will have held on to clouds most of the day, likely only bottoms out just either side of zero as well. Thursday-Friday: Surface low pressure moving up the East Coast will be heading out to sea Thursday, but hope for some flakes isn't totally lost. While the 500mb low is a little late in its phasing with this system, it still may aid in the development of an inverted trough that could stretch back to coastal areas Thursday night. This is highly dependent on the location of the low and trends continue to be in the wrong direction. This is true for Quantitative Precipitation Forecast as well as moisture on the outer fringes of this system is limited so as it stands now any flakes would amount to a dusting at best. Due to these trends I trimmed back Probability of Precipitation even more, with just Slight Chance now only in extreme southern New Hampshire and the southern tip of York County. The more likely sensible weather we get out of this system is breezy winds in its wake, maybe 25-30 mph, on Friday as it makes a northward turn into the Gulf of St. Lawrence and tightens the pressure gradient over the region. Saturday-Monday: Models are in relatively good agreement that high pressure stays dominant at the surface, helping to kick start a warming trend. A series of shortwaves and a more prominent trough rotate through, but with no synoptic forcing and little moisture, this likely results in just increased cloud cover at times. The next interesting feature is another coastal low pressure the models don't quite agree on. The Euro is the outlier at the moment with a much weaker system, whereas the GFS and CMC have much more developed coastal lows. Temperature is another sticking point as the Euro and CMC bring colder air back into the region, but the GFS (Global Forecast System) continues with the warm up. Nothing more than observations at this time range, but this is a good period to keep an eye on. Marine Short Term Gale to storm force winds ease to gales this morning, and then continue to lower to SCA (Small Craft Advisory) levels late this evening and overnight. Winds and seas continue to lower to below SCA (Small Craft Advisory) levels by late tomorrow morning as high pressure extends eastward across the waters. Moderate freezing spray continues through the day today, with areas of heavy freezing spray across the eastern waters this morning. Long Term Seas will be generally 2-4 ft through Saturday. Northwesterly wind gusts stay below 25 kts through the day Thursday, but will ramp up overnight into Friday as strong low pressure passes out to sea. Wind gusts are then expected to slacken below 25 kts by Saturday morning. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...Cold Weather Advisory until 9am EST this morning for MEZ007>009. Wind Advisory until 5pm EST this afternoon for MEZ018-023. NH...Cold Weather Advisory until 9am EST this morning for NHZ001- 002. Wind Advisory until 5pm EST this afternoon for NHZ005>015. Marine Storm Warning until 6am EST early this morning for ANZ150-152- 154. Heavy Freezing Spray Warning until 9am EST this morning for ANZ150-151. Gale Warning until 1pm EST this afternoon for ANZ151-153. Freezing Spray Advisory until 4pm EST this afternoon for ANZ152>154. |