Marine Weather and Tide Forecast for Palmyra, NY
April 30, 2025 11:38 AM EDT (15:38 UTC)
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 | Sunrise 6:02 AM Sunset 8:12 PM Moonrise 6:42 AM Moonset 11:25 PM |
LOZ043 Hamlin Beach To Mexico Bay Along Lake Ontario Including Irondequoit Bay- 637 Am Edt Wed Apr 30 2025
Today - Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Mostly Sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet.
Tonight - Southwest winds 10 knots or less becoming southeast. Mainly clear in the evening, then becoming partly cloudy. Waves 1 foot or less.
Thursday - Southeast winds 5 to 15 knots becoming east. Rain showers likely with a chance of Thunderstorms in the afternoon. Waves 1 to 3 feet.
Thursday night - Southeast winds 10 to 15 knots becoming south 15 to 20 knots. Showers likely with a chance of Thunderstorms. Waves 1 to 3 feet.
Friday - South winds 15 to 20 knots becoming west and diminishing to 5 to 10 knots. Showers likely with a chance of Thunderstorms during the day, then a chance of showers Friday night. Waves 1 to 3 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. Waves occasionally around 6 feet.
Saturday - West winds 5 to 15 knots. A chance of showers. Waves 1 to 2 feet.
Sunday - West winds 10 to 15 knots becoming northeast. Partly cloudy. Waves 1 to 3 feet.
winds and waves higher in and near Thunderstorms.
the water temperature off rochester is 43 degrees.
winds and waves higher in and near Thunderstorms.
the water temperature off rochester is 43 degrees.
LOZ005
No data
No data
7 Day Forecast for Marine Location Near Palmyra, NY
NEW! Add second zone forecast
FXUS61 KBUF 301357 AFDBUF
Area Forecast Discussion National Weather Service Buffalo NY 957 AM EDT Wed Apr 30 2025
SYNOPSIS
High pressure will build into the eastern Great Lakes today, with morning clouds giving way to increasing sunshine this afternoon. The recently departed frontal boundary will lift back northward as a warm front Thursday, ushering in the next round of showers and possible thunderstorms that will remain through Friday. This warm front will bring a mild start to May, though temperatures will be reduced a bit for the weekend.
NEAR TERM /THROUGH TONIGHT/
Canadian surface high pressure will bring a fresh light breeze across the region today with temperatures a good 25 to 30 degrees cooler than yesterday. Stratocumulus clouds have expanded this morning, supported by a residual shallow layer of low level moisture. These clouds will linger for a few hours through midday before mixing out, with increasing amounts of sunshine through the afternoon.
Freezing temperatures are likely east of Lake Ontario tonight with early evening radiational cooling conditions...but increasing clouds across WNY will slow overnight cooling.
SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/
Warm front lifts north into the region Thursday as low pressure moves northeast into the southern Great Lakes. The low will continue to move northeast into southern Ontario, eventually sending a cold front through the region during the day Friday. Sufficient instability will develop within the warm sector by mid to late Thursday afternoon supporting the development of showers and scattered thunderstorms, especially across western New York. Shear profiles improve courtesy of a 45 knot low level bringing at least a low risk for hail and wind threats into the evening.
The chance for showers and embedded thunderstorms will continue into Friday, as an upper level shortwave trough moves into the region along with the surface cold front extending from the low moving into eastern Canada. Instability and shear profiles not overly impressive, but some gusty thunderstorms are possible during the afternoon, especially across eastern portions of the area. Scattered showers will linger Friday night through Saturday night as the trough passes across the region.
LONG TERM /SUNDAY THROUGH TUESDAY/
Weak cyclonic flow will linger through Sunday, especially across the Northeast will support plenty of diurnal cumulus clouds. Upper level ridging will then build east across the Great Lakes region Monday and Tuesday, supporting a broad surface high and the likelihood for dry weather. However, there continues to remain hints of a cut off low to develop supporting Atlantic moisture to advect into the region, which would lead to a more pessimistic forecast.
AVIATION /14Z WEDNESDAY THROUGH SUNDAY/
Stratocumulus clouds have expanded this morning with areas of MVFR CIGS, supported by a residual shallow layer of low level moisture.
These clouds will linger for a few hours through midday before mixing out, with increasing amounts of sunshine and a return to VFR through the afternoon.
Tonight mid and high level clouds will begin to thicken from west to east ahead of the next warm front (storm system) that will bring unsettled weather back to the TAF region after tonight.
Outlook...
Thursday...VFR deteriorating to MVFR/IFR with showers developing.
Chance of thunderstorms.
Friday.. MVFR/IFR with showers likely and a chance of thunderstorms.
Saturday...Mainly VFR with scattered showers.
Sunday...VFR flight conditions.
MARINE
As surface high pressure builds across the Lower Great Lakes today northwest winds will gradually diminish, with wave heights relaxing through the afternoon hours. Light and variable winds this evening with the passing of the surface high.
Easterly winds Thursday will increase over the western waters of Lake Ontario, bringing a slight chop Thursday afternoon before winds veer to southerly and the greater wave heights drift into Canadian waters.
BUF WATCHES/WARNINGS/ADVISORIES
NY...None.
MARINE...None.
Area Forecast Discussion National Weather Service Buffalo NY 957 AM EDT Wed Apr 30 2025
SYNOPSIS
High pressure will build into the eastern Great Lakes today, with morning clouds giving way to increasing sunshine this afternoon. The recently departed frontal boundary will lift back northward as a warm front Thursday, ushering in the next round of showers and possible thunderstorms that will remain through Friday. This warm front will bring a mild start to May, though temperatures will be reduced a bit for the weekend.
NEAR TERM /THROUGH TONIGHT/
Canadian surface high pressure will bring a fresh light breeze across the region today with temperatures a good 25 to 30 degrees cooler than yesterday. Stratocumulus clouds have expanded this morning, supported by a residual shallow layer of low level moisture. These clouds will linger for a few hours through midday before mixing out, with increasing amounts of sunshine through the afternoon.
Freezing temperatures are likely east of Lake Ontario tonight with early evening radiational cooling conditions...but increasing clouds across WNY will slow overnight cooling.
SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/
Warm front lifts north into the region Thursday as low pressure moves northeast into the southern Great Lakes. The low will continue to move northeast into southern Ontario, eventually sending a cold front through the region during the day Friday. Sufficient instability will develop within the warm sector by mid to late Thursday afternoon supporting the development of showers and scattered thunderstorms, especially across western New York. Shear profiles improve courtesy of a 45 knot low level bringing at least a low risk for hail and wind threats into the evening.
The chance for showers and embedded thunderstorms will continue into Friday, as an upper level shortwave trough moves into the region along with the surface cold front extending from the low moving into eastern Canada. Instability and shear profiles not overly impressive, but some gusty thunderstorms are possible during the afternoon, especially across eastern portions of the area. Scattered showers will linger Friday night through Saturday night as the trough passes across the region.
LONG TERM /SUNDAY THROUGH TUESDAY/
Weak cyclonic flow will linger through Sunday, especially across the Northeast will support plenty of diurnal cumulus clouds. Upper level ridging will then build east across the Great Lakes region Monday and Tuesday, supporting a broad surface high and the likelihood for dry weather. However, there continues to remain hints of a cut off low to develop supporting Atlantic moisture to advect into the region, which would lead to a more pessimistic forecast.
AVIATION /14Z WEDNESDAY THROUGH SUNDAY/
Stratocumulus clouds have expanded this morning with areas of MVFR CIGS, supported by a residual shallow layer of low level moisture.
These clouds will linger for a few hours through midday before mixing out, with increasing amounts of sunshine and a return to VFR through the afternoon.
Tonight mid and high level clouds will begin to thicken from west to east ahead of the next warm front (storm system) that will bring unsettled weather back to the TAF region after tonight.
Outlook...
Thursday...VFR deteriorating to MVFR/IFR with showers developing.
Chance of thunderstorms.
Friday.. MVFR/IFR with showers likely and a chance of thunderstorms.
Saturday...Mainly VFR with scattered showers.
Sunday...VFR flight conditions.
MARINE
As surface high pressure builds across the Lower Great Lakes today northwest winds will gradually diminish, with wave heights relaxing through the afternoon hours. Light and variable winds this evening with the passing of the surface high.
Easterly winds Thursday will increase over the western waters of Lake Ontario, bringing a slight chop Thursday afternoon before winds veer to southerly and the greater wave heights drift into Canadian waters.
BUF WATCHES/WARNINGS/ADVISORIES
NY...None.
MARINE...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 45012 - Lake Ontario Buoy - 20NM North Northeast of Rochester, NY | 40 mi | 38 min | WNW 5.8G | 38°F | ||||
| OSGN6 - 9052030 - Oswego, NY | 47 mi | 50 min | N 6G | 30.16 |
Wind History for Oswego, NY
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Link to 1 hour of 5 minute data for KROC
Terminal Aerodrome Forecast (TAF) for KROC
Wind History Graph: ROC
(wind in knots)
GEOS Local Image of Northeast
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Binghamton, NY,
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