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Marine Weather and Tide Forecast for Ashton-Sandy Spring, MD

November 3, 2024 9:05 AM EST (14:05 UTC) Change Location
Sunrise 6:37 AM   Sunset 5:05 PM
Moonrise 8:52 AM   Moonset 6:03 PM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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ANZ538 Patapsco River Including Baltimore Harbor- 634 Am Est Sun Nov 3 2024

Today - NE winds 5 to 10 kt. Waves 1 ft or less.

Tonight - E winds 5 to 10 kt. Waves 1 ft.

Mon - SE winds 5 kt. Waves less than 1 ft.

Mon night - S winds 5 kt. Waves less than 1 ft.

Tue - S winds 5 to 10 kt. Waves 1 ft.

Tue night - S winds 10 kt. Waves 1 ft.

Wed - SW winds 5 to 10 kt - .becoming nw after midnight. Waves 1 ft or less. A chance of showers after midnight.

Thu - N winds 5 kt. Waves less than 1 ft. A chance of showers.
ANZ500 634 Am Est Sun Nov 3 2024

Synopsis for the tidal potomac and md portion of the chesapeake bay -
high pressure will remain north of the area through Monday. A warm front will lift north of the area by Tuesday. A slow-moving cold front will settle into the area Wednesday and Thursday. Small craft advisories will likely be needed Tuesday through early Wednesday.

7 Day Forecast for Marine Location Near Ashton-Sandy Spring, MD
   
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Tide / Current for Chain Bridge, D.C.
  
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Chain Bridge
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Sun -- 04:03 AM EST     0.32 feet Low Tide
Sun -- 06:38 AM EST     Sunrise
Sun -- 08:51 AM EST     Moonrise
Sun -- 09:31 AM EST     2.67 feet High Tide
Sun -- 03:34 PM EST     0.31 feet Low Tide
Sun -- 05:04 PM EST     Sunset
Sun -- 06:05 PM EST     Moonset
Sun -- 09:27 PM EST     3.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
Sorry tide depth graphs only, please select another station.

Chain Bridge, D.C., Tide feet
12
am
2.5
1
am
1.3
2
am
0.8
3
am
0.5
4
am
0.3
5
am
0.5
6
am
1
7
am
1.8
8
am
2.3
9
am
2.6
10
am
2.6
11
am
2.3
12
pm
1.7
1
pm
1.1
2
pm
0.6
3
pm
0.4
4
pm
0.3
5
pm
0.6
6
pm
1.2
7
pm
2.1
8
pm
2.8
9
pm
3.1
10
pm
3.1
11
pm
2.8

Tide / Current for Benning Bridge, D.C.
  
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Benning Bridge
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Sun -- 03:57 AM EST     0.34 feet Low Tide
Sun -- 06:38 AM EST     Sunrise
Sun -- 08:50 AM EST     Moonrise
Sun -- 09:27 AM EST     2.77 feet High Tide
Sun -- 03:28 PM EST     0.33 feet Low Tide
Sun -- 05:04 PM EST     Sunset
Sun -- 06:04 PM EST     Moonset
Sun -- 09:23 PM EST     3.29 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
Sorry tide depth graphs only, please select another station.

Benning Bridge, D.C., Tide feet
12
am
2.5
1
am
1.3
2
am
0.8
3
am
0.5
4
am
0.3
5
am
0.5
6
am
1.1
7
am
1.9
8
am
2.5
9
am
2.7
10
am
2.7
11
am
2.3
12
pm
1.7
1
pm
1.1
2
pm
0.6
3
pm
0.4
4
pm
0.4
5
pm
0.7
6
pm
1.3
7
pm
2.2
8
pm
2.9
9
pm
3.3
10
pm
3.2
11
pm
2.8

Area Discussion for Baltimore, MD/Washington
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FXUS61 KLWX 030831 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 331 AM EST Sun Nov 3 2024

SYNOPSIS
Surface high pressure centered to our north will continue to shift eastward off the coast of New England through Monday. A warm front moves north of the area Monday into Tuesday ahead of an approaching cold front set to cross the area midweek. High pressure returns next weekend.

NEAR TERM /THROUGH TONIGHT/
Strong upper level ridging paired with surface high pressure over the east coast will bring sunny skies, light winds, and dry conditions to the area today. Northerly winds this morning shift to easterly by tonight, blowing less than 10 knots. The exception will be those along the Alleghenies where gusts up to 20 knots are expected.

High temperatures this afternoon will be 50s to low 60s areawide. Overnight low temperatures dip into the 30s to low 40s for most. Those in metro areas and along the Chesapeake Bay will stay in the mid to upper 40s.

SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/
Strong upper level ridging continues to build overhead Monday before slowly shifting eastward throughout the day on Tuesday.
An approaching upper level trough pushes a low pressure system and associated frontal boundary toward the Great Lakes region and into central Canada. As a result, a warm front lifts north of the area Monday bringing increased cloud cover to the region.
Precipitation returns to the forecast Tuesday night as a cold front approaches from the west. There is a slight chance to chance of rain showers for those along and west of I-81 with the rest of the area expected to remain dry.

Temperatures warm slightly for Monday with high temperatures in the 60s for most. Those at higher elevations stay in the 50s.
Overnight lows on Monday will be in the 40s and 50s across the area. Temperatures continue to warm under southerly flow on Tuesday. High temperatures are expected to be in the 70s areawide with only those at highest elevations staying in the 60s. Overnight lows will be in the 50s to low 60s.

LONG TERM /WEDNESDAY THROUGH SATURDAY/
A cold front will be positioned just northwest of the area Wednesday, but the parent low will be ejecting well to the northeast into Maritime Canada, leaving the front parallel to the upper flow around the offshore ridge. The front will slowly settle southward into the area Wednesday night and Thursday. The highest chance for rain Wednesday will be in the mountains, with a downslope wind component drying moisture as it moves east. Additional showers will remain possible through Thursday before the front sinks farther south Thursday night. The Canadian and its ensemble are still most aggressive with deeper Gulf moisture working into the area. The EC and GEFS show the probability for greater than a tenth of an inch of rain to be less than 30 percent for much of the area. Temperatures will remain well above normal Wednesday...pushing the mid 70s to near 80. A slight cooling trend will begin Thursday as the front moves through.

It appears the front will be far enough south by Friday for high pressure to build in from the west with clearing skies. This high will likely remain nearby through Saturday, keeping rain chances low. The postfrontal airmass won't have a northern stream connection, so temperatures will likely remain above normal: highs in the mid to upper 60s and lows in the 40s.

AVIATION /08Z SUNDAY THROUGH THURSDAY/
High pressure builds to our north through Monday, resulting in relatively light winds. Northerly winds this morning shift to southeasterly Monday and then remain out of the south for Tuesday. Prevailing VFR conditions are expected, though cloud cover increases in light onshore flow Monday.

A few showers will be possible Wednesday through Thursday as a cold front slowly moves through the area. However, the chance for sub-VFR conditions is low due to a lack of low level moisture.

MARINE
Northerly channeling is resulting in gusty winds over the waters through this morning, despite light winds elsewhere.
Winds are expected to shift to more easterly later this morning, with winds dropping below SCA criteria. High pressure building to our north will result in relatively light winds through Monday. Winds shift to southerly in return flow on Tuesday, resulting in gusty winds over the waters. SCAs may be needed for southerly channeling on Tuesday.

SCA conditions may linger into Wednesday with southwesterly flow ahead of the cold front. This front will slowly move through the area Thursday, and the lack of rapid pressure changes will likely keep winds light with the front's passage.



TIDES/COASTAL FLOODING
Tidal anomalies are on the rise this morning as lighter winds have allowed water suppressed to the south to return. Anomalies will rise further tonight into Monday as an onshore wind component develops.
The peak tide appears to be Monday afternoon. While flooding is not forecast at this time, Annapolis and DC SW Waterfront could approach minor flood stage.

LWX WATCHES/WARNINGS/ADVISORIES
DC...None.
MD...None.
VA...None.
WV...None.
MARINE...Small Craft Advisory until 11 AM EST this morning for ANZ531>534-537-539>541-543.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
WASD2 - 8594900 - Washington, DC 19 mi47 minN 2.9G6 49°F 62°F30.49
BLTM2 - 8574680 - Baltimore, MD 24 mi47 minN 8G11 48°F 64°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 25 mi47 minNNE 8G11 46°F 30.50
APAM2 - 8575512 - Annapolis, MD 30 mi47 minN 5.1G11 50°F 64°F30.47
BSLM2 - Chesapeake Bay, MD 30 mi95 minNNW 1.9 38°F 30.4538°F
44043 - Patapsco, MD 32 mi35 minNNE 16G19 48°F 62°F2 ft
44063 - Annapolis 32 mi35 minNNE 12G18 49°F 62°F1 ft
CPVM2 34 mi47 min 49°F 33°F
TPLM2 - Thomas Point, MD 35 mi65 minNNE 12G13 49°F 30.50
TCBM2 - 8573364 - Tolchester Beach, MD 40 mi47 minNE 4.1G8.9 30.49


Wind History for Washington, DC
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Airport Reports
   
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Weather Map
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GEOS Local Image of east us  
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Sterling, VA,





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