Marine Weather and Tide Forecast for Chambersburg, PA
April 22, 2025 6:46 PM EDT (22:46 UTC) Change Location
![]() | Sunrise 6:20 AM Sunset 7:57 PM Moonrise 2:39 AM Moonset 12:56 PM |
ANZ538 Patapsco River Including Baltimore Harbor- 434 Pm Edt Tue Apr 22 2025
Rest of this afternoon - W winds 10 kt. Waves 1 ft.
Tonight - NW winds 5 kt. Waves less than 1 ft.
Wed - E winds 5 kt. Waves flat.
Wed night - S winds around 5 kt. Waves flat.
Thu - SE winds around 5 kt. Waves 1 ft or less.
Thu night - S winds around 5 kt. Waves 1 ft or less.
Fri - S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers in the evening. Showers likely after midnight.
Sat - W winds 5 to 10 kt - .becoming n. Waves 1 ft. Showers likely .
ANZ500 434 Pm Edt Tue Apr 22 2025
Synopsis for the tidal potomac and md portion of the chesapeake bay -
a cold front will slowly drift south of the area through tonight. Weak high pressure builds in for the middle of the week before this front lifts northward across the area as a warm front on Friday. Small craft advisories may be needed late Friday into Saturday. Boaters should be aware of the threats of boating in cold water, even when air temperatures are warm. Visit weather.gov/safety/coldwater for more information.
a cold front will slowly drift south of the area through tonight. Weak high pressure builds in for the middle of the week before this front lifts northward across the area as a warm front on Friday. Small craft advisories may be needed late Friday into Saturday. Boaters should be aware of the threats of boating in cold water, even when air temperatures are warm. Visit weather.gov/safety/coldwater for more information.
7 Day Forecast for Marine Location Near Chambersburg, PA

NEW! Add second zone forecast
Middle Branch Click for Map Tue -- 02:39 AM EDT 1.06 feet High Tide Tue -- 03:33 AM EDT Moonrise Tue -- 06:19 AM EDT Sunrise Tue -- 08:53 AM EDT 0.35 feet Low Tide Tue -- 01:53 PM EDT Moonset Tue -- 03:05 PM EDT 1.28 feet High Tide Tue -- 07:51 PM EDT Sunset Tue -- 10:05 PM EDT 0.40 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Middle Branch, Baltimore Harbor, Maryland, Tide feet
12 am |
0.7 |
1 am |
0.9 |
2 am |
1 |
3 am |
1.1 |
4 am |
1 |
5 am |
0.8 |
6 am |
0.6 |
7 am |
0.5 |
8 am |
0.4 |
9 am |
0.4 |
10 am |
0.4 |
11 am |
0.6 |
12 pm |
0.8 |
1 pm |
1 |
2 pm |
1.2 |
3 pm |
1.3 |
4 pm |
1.2 |
5 pm |
1.1 |
6 pm |
0.9 |
7 pm |
0.7 |
8 pm |
0.6 |
9 pm |
0.5 |
10 pm |
0.4 |
11 pm |
0.4 |
Baltimore (Fort McHenry) Click for Map Tue -- 02:13 AM EDT 1.18 feet High Tide Tue -- 03:33 AM EDT Moonrise Tue -- 06:19 AM EDT Sunrise Tue -- 08:25 AM EDT 0.38 feet Low Tide Tue -- 01:53 PM EDT Moonset Tue -- 02:39 PM EDT 1.42 feet High Tide Tue -- 07:51 PM EDT Sunset Tue -- 09:37 PM EDT 0.43 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Baltimore (Fort McHenry), Maryland, Tide feet
12 am |
0.9 |
1 am |
1.1 |
2 am |
1.2 |
3 am |
1.1 |
4 am |
1 |
5 am |
0.8 |
6 am |
0.6 |
7 am |
0.5 |
8 am |
0.4 |
9 am |
0.4 |
10 am |
0.5 |
11 am |
0.7 |
12 pm |
1 |
1 pm |
1.2 |
2 pm |
1.4 |
3 pm |
1.4 |
4 pm |
1.3 |
5 pm |
1.1 |
6 pm |
0.9 |
7 pm |
0.7 |
8 pm |
0.6 |
9 pm |
0.5 |
10 pm |
0.4 |
11 pm |
0.5 |
Area Discussion for State College, PA
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FXUS61 KCTP 222150 AFDCTP
Area Forecast Discussion National Weather Service State College PA 550 PM EDT Tue Apr 22 2025
SYNOPSIS
* Fair and pleasant tonight into Wednesday * Trending warmer Wednesday and Thursday with no precipitation * Rain returns Friday night into Saturday followed by dry weather on Sunday to close out the last weekend of April
NEAR TERM /THROUGH WEDNESDAY/
A baroclinic leaf canopy of mid to high clouds continue to stream over most of central and southern PA this evening as a southern stream disturbance moves off the mid Atlantic coast through tonight. Sfc high pressure building from northeast OH late this afternoon will maintain fair and seasonable conditions tonight and Wednesday. Our forecast temps lean slightly cooler than NBM, particularly over the northern tier (using dewpoints as a floor) where areas of frost are most likely to form with min temps in the mid 30s. HRRR suggests this area is most likely to experience the best radiational cooling as high clouds peel away around daybreak.
SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/
Mostly sunny, warmer and rain free conditions expected into late week. Highs trend to the upside day over day with Thursday's maxT fcst to climb 10 to 20 degrees above the historical average into the 70-80F range. Nights will also be relatively mild for this time of year with a series of higher lows into the weekend. Increasing clouds on Friday and precipitation arriving in the west in the afternoon should keep temperatures in check somewhat, but highs should still get into the 70s areawide. Quite a week for springtime activities with sunset occurring around 8PM and ideal weather for being outside.
LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/
A surface low is currently progged to arrive Friday night as it crosses over the Great Lakes region into northern Pennsylvania.
This low, and the associated trailing cold front, is expected to bring widespread showers and thunderstorms into the region at the beginning of this extended period. Southerly gulf flow will bring a plume of moisture into the mid-atlantic region ahead of this system, providing ample deep moisture for afternoon convection on Friday. These showers will likely linger well into Saturday, with scattered thunderstorms associated with day time heating possible behind the cold front, before precipitation chances diminish into Saturday night.
Conditions are expected to dry out on Sunday with upper level ridging building in as the 500mb jet lifts to the northeast along with the associated short wave from Saturday. Temperatures will remain cooler on Sunday with highs expected to be in the mid 60s for most of central Pennsylvania. A warm up will then begin to occur Monday into Tuesday. 850mb temps will be well above 10C Tuesday, allowing for above average temps towards the middle of next week.
AVIATION /22Z TUESDAY THROUGH SUNDAY/
Few to scattered clouds are present over the airspace this afternoon. No flight restrictions are expected for the next 24 hours with mainly clear skies expected to continue overnight tonight. Winds this afternoon will be gusting out of the west up to 25kts. Tonight after sundown winds will gradually diminish and become calm.
Outlook...
Wed-Thu...No sig wx expected.
Fri...Showers developing during the afternoon with restrictions possible.
Sat...Showers and maybe a thunderstorm.
Sun...No sig wx expected.
CTP WATCHES/WARNINGS/ADVISORIES
None.
Area Forecast Discussion National Weather Service State College PA 550 PM EDT Tue Apr 22 2025
SYNOPSIS
* Fair and pleasant tonight into Wednesday * Trending warmer Wednesday and Thursday with no precipitation * Rain returns Friday night into Saturday followed by dry weather on Sunday to close out the last weekend of April
NEAR TERM /THROUGH WEDNESDAY/
A baroclinic leaf canopy of mid to high clouds continue to stream over most of central and southern PA this evening as a southern stream disturbance moves off the mid Atlantic coast through tonight. Sfc high pressure building from northeast OH late this afternoon will maintain fair and seasonable conditions tonight and Wednesday. Our forecast temps lean slightly cooler than NBM, particularly over the northern tier (using dewpoints as a floor) where areas of frost are most likely to form with min temps in the mid 30s. HRRR suggests this area is most likely to experience the best radiational cooling as high clouds peel away around daybreak.
SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/
Mostly sunny, warmer and rain free conditions expected into late week. Highs trend to the upside day over day with Thursday's maxT fcst to climb 10 to 20 degrees above the historical average into the 70-80F range. Nights will also be relatively mild for this time of year with a series of higher lows into the weekend. Increasing clouds on Friday and precipitation arriving in the west in the afternoon should keep temperatures in check somewhat, but highs should still get into the 70s areawide. Quite a week for springtime activities with sunset occurring around 8PM and ideal weather for being outside.
LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/
A surface low is currently progged to arrive Friday night as it crosses over the Great Lakes region into northern Pennsylvania.
This low, and the associated trailing cold front, is expected to bring widespread showers and thunderstorms into the region at the beginning of this extended period. Southerly gulf flow will bring a plume of moisture into the mid-atlantic region ahead of this system, providing ample deep moisture for afternoon convection on Friday. These showers will likely linger well into Saturday, with scattered thunderstorms associated with day time heating possible behind the cold front, before precipitation chances diminish into Saturday night.
Conditions are expected to dry out on Sunday with upper level ridging building in as the 500mb jet lifts to the northeast along with the associated short wave from Saturday. Temperatures will remain cooler on Sunday with highs expected to be in the mid 60s for most of central Pennsylvania. A warm up will then begin to occur Monday into Tuesday. 850mb temps will be well above 10C Tuesday, allowing for above average temps towards the middle of next week.
AVIATION /22Z TUESDAY THROUGH SUNDAY/
Few to scattered clouds are present over the airspace this afternoon. No flight restrictions are expected for the next 24 hours with mainly clear skies expected to continue overnight tonight. Winds this afternoon will be gusting out of the west up to 25kts. Tonight after sundown winds will gradually diminish and become calm.
Outlook...
Wed-Thu...No sig wx expected.
Fri...Showers developing during the afternoon with restrictions possible.
Sat...Showers and maybe a thunderstorm.
Sun...No sig wx expected.
CTP WATCHES/WARNINGS/ADVISORIES
None.
Wind History for Baltimore, MD
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Airport Reports
Link to 1 hour of 5 minute data for KHGR
Terminal Aerodrome Forecast (TAF) for KHGR
Wind History Graph: HGR
(wind in knots)GEOS Local Image of east us
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