Marine Weather and Tide Forecast for Bath, ME
May 15, 2024 12:07 PM EDT (16:07 UTC) Change Location
 | Sunrise 5:11 AM Sunset 8:00 PM Moonrise 12:04 PM Moonset 2:01 AM |
ANZ153 Casco Bay- 1136 Am Edt Wed May 15 2024
This afternoon - S winds 5 to 10 kt. Seas 2 to 3 ft.
Tonight - SW winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Patchy fog in the evening, then areas of fog after midnight. Vsby 1 nm or less.
Thu - S winds around 5 kt, becoming se in the afternoon. Seas around 2 ft. Areas of fog. Vsby 1 nm or less.
Thu night - E winds around 5 kt, becoming ne after midnight. Seas 2 to 3 ft.
Fri - E winds 5 to 10 kt. Seas 2 to 4 ft.
Fri night - E winds 5 to 10 kt. Seas 2 to 4 ft.
Sat - E winds 5 to 10 kt. Seas 2 to 3 ft.
Sat night - E winds 5 to 10 kt. Seas 2 to 4 ft.
Sun - E winds 5 to 10 kt. Seas 2 to 4 ft.
Sun night - E winds 5 to 10 kt, becoming ne after midnight. Seas 2 to 4 ft.
ANZ100 1136 Am Edt Wed May 15 2024
Synopsis for stonington me to merrimack river ma out to 25 nm a stalled cold front north of the waters gradually dissipates through today with a light south to southwest flow across the waters a slow moving area of low pressure tracks south of the waters this afternoon through Saturday, just offshore of the mid-atlantic coast. Another area of low pressure follows a similar track to the first system over the upcoming weekend south of the waters.
Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 151544 AFDGYX
Area Forecast Discussion National Weather Service Gray ME 1144 AM EDT Wed May 15 2024
SYNOPSIS
A stalled frontal boundary will result in unsettled, showery weather for the remainder of this week and through the weekend with temperatures remaining seasonable for mid May. A few thunderstorms are possible this afternoon, mainly across northern areas.
NEAR TERM /UNTIL 6 PM THIS EVENING/
11:40am Update... Updated temps, POPs and cloud cover for today. Areas with more sunshine have quickly warmed into the 60s to near 70, and are likely to climb a few degrees more.
Meanwhile, parts of southwest New Hampshire remain in the low 60s following some scattered showers. Showers continue to slowly move north through central NH. These showers expand in coverage across northern areas through the late afternoon hours, with dry conditions across the coastal plain. Overall no major changes with this update, just a bit of fine tuning.
630 AM Update...Minor edits to sky, temps, and dewpoints to match observations, but the overall forecast remains on track.
Previous...
The unsettled pattern continues today with a stalled frontal boundary lingering across the area and weak forcing aloft bring more showers to the area along with a chance thunderstorms across northern areas this afternoon. In the low levels, a weak ridge axis will be draped across the area with a light southwesterly flow while a low- pressure system emerges off the Mid-Atlantic.
This will bring another warm day with temperatures expected to reach the upper 60s to lower 70s across the interior while the coast again remains a tad cooler.
Back to rain chances...expect a few showers to continue across northern areas early this morning with weak PVA aloft. Looking upstream...an area of (mostly) light showers is pushing into western Mass. at this hour, and expect this to gradually move northward across southern and central NH this morning. Short-range guidance depicts this area of light showers will gradually dissipate by late morning or early afternoon, but it's possible a few additional showers redevelop across these areas after.
Central and northern areas continue to be favored for showers and a few storms this afternoon while areas to the south see lesser coverage. Flow aloft will be very weak, so showers/storms will be slow-moving, and due to the slow-moving nature, hydro concerns aren't out of the question across the north today if repeated rounds or more persistent convection occurs, especially with moisture being a bit higher than yesterday.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/
Convective coverage will follow a downward trend this evening with potential for any thunder only lasting maybe an hour or two after sunset. There will still be some lift present from the foothills northward overnight however, so I still think there will be showers from time to time, especially farther north. The rest of the area is expected to remain generally dry, with the exception being southern NH where some light rain may sneak on the northern fringe of the area of low pressure to the south.
Otherwise, light winds and sufficient boundary layer moisture will again promote fog development with most of western ME and into northern NH looking the best potential. The Midcoast may even start seeing marine fog move in as early as late this evening. Overnight lows remain above normal with temps staying the 50s.
Slow-moving low pressure will still be meandering well to our south on Thursday while a weak 500mb ridge tries to nose into northern New England. There will still be enough moisture/weak instability for diurnal showers, again with central and northern areas favored, but I think coverage will be kept on the lower side given that the atmosphere will be slightly drier and also with some suppression from the ridge. That said, there is little to no flow aloft, so what does develop will probably be slow-moving and could bring some heavy downpours. Max temps across the interior look to be mostly in the lower 70s while the onshore flow limits temps along the coast to the 60s.
LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/
A largely unsettled pattern persists over the area with fuzzy day-to- day details, but a straight-forward broad picture featuring daily chances for mainly-diurnal showers and predominantly mild conditions. From a synoptic standpoint, this is due to predominantly zonal flow over the NOAM mid-latitudes featuring a conga line of northern and southern stream disturbances embedded within the westerlies.
At the surface, there is good model agreement keeping high pressure centered over Maritime Canada... and extending south along the New England Coast. The combination of the two gives neither a total- washout of an extended forecast, nor a dry stretch of weather... but somewhere in between.
From a hazard perspective, slow-moving/stalled fronts with disturbances running along them will promote potential for back- building and/or training showers and some thunderstorms.
This flow regime also promotes periods of onshore flow. Much like the last several days however a source region from the Maritime Canada high may not be humid enough to produce classic "socked in" conditions along the coastal plain. Early looks at boundary layer lapse rates suggests as much. So ultimately it looks like we'll enjoy nicer weather than surface wind direction may otherwise imply with temperatures generally warming into the 60s and 70s... modified by afternoon showers and storms, and by the sea breeze. Ensemble solutions suggest the greatest inroads for the marine layer comes this weekend, with the aforementioned southern stream Atlantic low potentially drifting north and bringing some of its moisture into the easterly flow across the Gulf of Maine. Although humid, PoP has actually trended down around that time given a lack of adequate phasing and forcing.
AVIATION /16Z WEDNESDAY THROUGH SUNDAY/
Short Term... Mainly VFR outside of precipitation the rest of today, with scattered showers potentially bringing brief restrictions should they pass over any terminal. Highest potential for this will be north of a LEB- IZG- AUG line, where there may also be a few thunderstorms. Coverage of showers will diminish this evening with only a low chance overnight, but fog and low ceilings will be a threat again. Overall coverage of showers looks lower on Thursday with generally VFR outside of showers.
Long Term...Low confidence in the day to day details of the forecast exists, especially along the coast. However the pattern suggests prevailing VFR with potential for periodic restrictions in overnight FG or afternoon/evening SHRA.
MARINE
Short Term...Weak surface ridge will be draped across the waters today into tonight with a prevailing light south to southwest flow.
At the same time a slow-moving low pressure will remain nearly stationary off the Mid-Atlantic coast, and while it will stay well south of the waters, it will weaken the surface ridge and bring a light easterly flow over the waters on Thursday. Fog will become more likely tonight and Thursday.
Long Term...Weak pressure gradient force keeps winds and seas below SCA thresholds through the long range forecast period. The best chance for any sort of active seas comes with a swell off a distant Atlantic storm system, which may approach 5 ft over the weekend.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None.
NH...None.
MARINE...None.
Area Forecast Discussion National Weather Service Gray ME 1144 AM EDT Wed May 15 2024
SYNOPSIS
A stalled frontal boundary will result in unsettled, showery weather for the remainder of this week and through the weekend with temperatures remaining seasonable for mid May. A few thunderstorms are possible this afternoon, mainly across northern areas.
NEAR TERM /UNTIL 6 PM THIS EVENING/
11:40am Update... Updated temps, POPs and cloud cover for today. Areas with more sunshine have quickly warmed into the 60s to near 70, and are likely to climb a few degrees more.
Meanwhile, parts of southwest New Hampshire remain in the low 60s following some scattered showers. Showers continue to slowly move north through central NH. These showers expand in coverage across northern areas through the late afternoon hours, with dry conditions across the coastal plain. Overall no major changes with this update, just a bit of fine tuning.
630 AM Update...Minor edits to sky, temps, and dewpoints to match observations, but the overall forecast remains on track.
Previous...
The unsettled pattern continues today with a stalled frontal boundary lingering across the area and weak forcing aloft bring more showers to the area along with a chance thunderstorms across northern areas this afternoon. In the low levels, a weak ridge axis will be draped across the area with a light southwesterly flow while a low- pressure system emerges off the Mid-Atlantic.
This will bring another warm day with temperatures expected to reach the upper 60s to lower 70s across the interior while the coast again remains a tad cooler.
Back to rain chances...expect a few showers to continue across northern areas early this morning with weak PVA aloft. Looking upstream...an area of (mostly) light showers is pushing into western Mass. at this hour, and expect this to gradually move northward across southern and central NH this morning. Short-range guidance depicts this area of light showers will gradually dissipate by late morning or early afternoon, but it's possible a few additional showers redevelop across these areas after.
Central and northern areas continue to be favored for showers and a few storms this afternoon while areas to the south see lesser coverage. Flow aloft will be very weak, so showers/storms will be slow-moving, and due to the slow-moving nature, hydro concerns aren't out of the question across the north today if repeated rounds or more persistent convection occurs, especially with moisture being a bit higher than yesterday.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/
Convective coverage will follow a downward trend this evening with potential for any thunder only lasting maybe an hour or two after sunset. There will still be some lift present from the foothills northward overnight however, so I still think there will be showers from time to time, especially farther north. The rest of the area is expected to remain generally dry, with the exception being southern NH where some light rain may sneak on the northern fringe of the area of low pressure to the south.
Otherwise, light winds and sufficient boundary layer moisture will again promote fog development with most of western ME and into northern NH looking the best potential. The Midcoast may even start seeing marine fog move in as early as late this evening. Overnight lows remain above normal with temps staying the 50s.
Slow-moving low pressure will still be meandering well to our south on Thursday while a weak 500mb ridge tries to nose into northern New England. There will still be enough moisture/weak instability for diurnal showers, again with central and northern areas favored, but I think coverage will be kept on the lower side given that the atmosphere will be slightly drier and also with some suppression from the ridge. That said, there is little to no flow aloft, so what does develop will probably be slow-moving and could bring some heavy downpours. Max temps across the interior look to be mostly in the lower 70s while the onshore flow limits temps along the coast to the 60s.
LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/
A largely unsettled pattern persists over the area with fuzzy day-to- day details, but a straight-forward broad picture featuring daily chances for mainly-diurnal showers and predominantly mild conditions. From a synoptic standpoint, this is due to predominantly zonal flow over the NOAM mid-latitudes featuring a conga line of northern and southern stream disturbances embedded within the westerlies.
At the surface, there is good model agreement keeping high pressure centered over Maritime Canada... and extending south along the New England Coast. The combination of the two gives neither a total- washout of an extended forecast, nor a dry stretch of weather... but somewhere in between.
From a hazard perspective, slow-moving/stalled fronts with disturbances running along them will promote potential for back- building and/or training showers and some thunderstorms.
This flow regime also promotes periods of onshore flow. Much like the last several days however a source region from the Maritime Canada high may not be humid enough to produce classic "socked in" conditions along the coastal plain. Early looks at boundary layer lapse rates suggests as much. So ultimately it looks like we'll enjoy nicer weather than surface wind direction may otherwise imply with temperatures generally warming into the 60s and 70s... modified by afternoon showers and storms, and by the sea breeze. Ensemble solutions suggest the greatest inroads for the marine layer comes this weekend, with the aforementioned southern stream Atlantic low potentially drifting north and bringing some of its moisture into the easterly flow across the Gulf of Maine. Although humid, PoP has actually trended down around that time given a lack of adequate phasing and forcing.
AVIATION /16Z WEDNESDAY THROUGH SUNDAY/
Short Term... Mainly VFR outside of precipitation the rest of today, with scattered showers potentially bringing brief restrictions should they pass over any terminal. Highest potential for this will be north of a LEB- IZG- AUG line, where there may also be a few thunderstorms. Coverage of showers will diminish this evening with only a low chance overnight, but fog and low ceilings will be a threat again. Overall coverage of showers looks lower on Thursday with generally VFR outside of showers.
Long Term...Low confidence in the day to day details of the forecast exists, especially along the coast. However the pattern suggests prevailing VFR with potential for periodic restrictions in overnight FG or afternoon/evening SHRA.
MARINE
Short Term...Weak surface ridge will be draped across the waters today into tonight with a prevailing light south to southwest flow.
At the same time a slow-moving low pressure will remain nearly stationary off the Mid-Atlantic coast, and while it will stay well south of the waters, it will weaken the surface ridge and bring a light easterly flow over the waters on Thursday. Fog will become more likely tonight and Thursday.
Long Term...Weak pressure gradient force keeps winds and seas below SCA thresholds through the long range forecast period. The best chance for any sort of active seas comes with a swell off a distant Atlantic storm system, which may approach 5 ft over the weekend.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None.
NH...None.
MARINE...None.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| 44032 - Buoy E0104 - Central Maine Shelf | 28 mi | 123 min | S 3.9G | 50°F | 3 ft | 29.89 | ||
| CASM1 - 8418150 - Portland, ME | 29 mi | 49 min | NE 1G | 57°F | 52°F | 29.85 | ||
| 44007 - PORTLAND 12 NM Southeast of Portland,ME | 32 mi | 37 min | SSW 7.8G | 54°F | 51°F | 29.89 | 52°F | |
| 44033 - Buoy F0103 - West Penobscot Bay | 44 mi | 123 min | SSE 1.9G | 49°F | 47°F | 2 ft | 29.88 |
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KIWI WISCASSET,ME | 6 sm | 14 min | SSE 07 | 10 sm | Overcast | 64°F | 54°F | 68% | 29.90 |
Bath
Click for Map
Wed -- 12:34 AM EDT 1.37 feet Low Tide
Wed -- 02:01 AM EDT Moonset
Wed -- 05:12 AM EDT Sunrise
Wed -- 06:31 AM EDT 6.25 feet High Tide
Wed -- 07:49 AM EDT First Quarter
Wed -- 12:03 PM EDT Moonrise
Wed -- 01:16 PM EDT 0.83 feet Low Tide
Wed -- 07:19 PM EDT 5.65 feet High Tide
Wed -- 07:59 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 12:34 AM EDT 1.37 feet Low Tide
Wed -- 02:01 AM EDT Moonset
Wed -- 05:12 AM EDT Sunrise
Wed -- 06:31 AM EDT 6.25 feet High Tide
Wed -- 07:49 AM EDT First Quarter
Wed -- 12:03 PM EDT Moonrise
Wed -- 01:16 PM EDT 0.83 feet Low Tide
Wed -- 07:19 PM EDT 5.65 feet High Tide
Wed -- 07:59 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Bath, Kennebec River, Maine, Tide feet
| 12 am |
| 1.5 |
| 1 am |
| 1.4 |
| 2 am |
| 2 |
| 3 am |
| 3.2 |
| 4 am |
| 4.5 |
| 5 am |
| 5.6 |
| 6 am |
| 6.2 |
| 7 am |
| 6.2 |
| 8 am |
| 5.7 |
| 9 am |
| 4.7 |
| 10 am |
| 3.5 |
| 11 am |
| 2.3 |
| 12 pm |
| 1.3 |
| 1 pm |
| 0.9 |
| 2 pm |
| 1 |
| 3 pm |
| 1.8 |
| 4 pm |
| 3.1 |
| 5 pm |
| 4.3 |
| 6 pm |
| 5.2 |
| 7 pm |
| 5.6 |
| 8 pm |
| 5.5 |
| 9 pm |
| 5 |
| 10 pm |
| 4.1 |
| 11 pm |
| 3 |
Upper Hell Gate (Sasanoa River
Click for Map
Wed -- 02:01 AM EDT Moonset
Wed -- 03:09 AM EDT 0.00 knots Slack
Wed -- 05:12 AM EDT Sunrise
Wed -- 05:51 AM EDT 0.68 knots Max Flood
Wed -- 07:49 AM EDT First Quarter
Wed -- 09:57 AM EDT -0.00 knots Slack
Wed -- 12:01 PM EDT -0.71 knots Max Ebb
Wed -- 12:03 PM EDT Moonrise
Wed -- 03:58 PM EDT 0.00 knots Slack
Wed -- 07:58 PM EDT Sunset
Wed -- 08:23 PM EDT 0.73 knots Max Flood
Wed -- 10:47 PM EDT -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 02:01 AM EDT Moonset
Wed -- 03:09 AM EDT 0.00 knots Slack
Wed -- 05:12 AM EDT Sunrise
Wed -- 05:51 AM EDT 0.68 knots Max Flood
Wed -- 07:49 AM EDT First Quarter
Wed -- 09:57 AM EDT -0.00 knots Slack
Wed -- 12:01 PM EDT -0.71 knots Max Ebb
Wed -- 12:03 PM EDT Moonrise
Wed -- 03:58 PM EDT 0.00 knots Slack
Wed -- 07:58 PM EDT Sunset
Wed -- 08:23 PM EDT 0.73 knots Max Flood
Wed -- 10:47 PM EDT -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Upper Hell Gate (Sasanoa River, Maine) Current, knots
| 12 am |
| -0.5 |
| 1 am |
| -0.4 |
| 2 am |
| -0.2 |
| 3 am |
| -0 |
| 4 am |
| 0.3 |
| 5 am |
| 0.6 |
| 6 am |
| 0.7 |
| 7 am |
| 0.6 |
| 8 am |
| 0.6 |
| 9 am |
| 0.4 |
| 10 am |
| -0 |
| 11 am |
| -0.5 |
| 12 pm |
| -0.7 |
| 1 pm |
| -0.6 |
| 2 pm |
| -0.5 |
| 3 pm |
| -0.3 |
| 4 pm |
| 0 |
| 5 pm |
| 0.4 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.7 |
| 8 pm |
| 0.7 |
| 9 pm |
| 0.7 |
| 10 pm |
| 0.4 |
| 11 pm |
| -0.1 |
Portland, ME,
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