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Marine Weather and Tides National Harbor, MD Version 3.4

NOTICE 3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone. 1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

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Sunrise 6:52AM

Sunset 7:11PM

Sunday September 19, 2021 9:40 AM EDT (13:40 UTC)

Moonrise 5:59PM

Moonset 4:11AM

Illumination 96%

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.

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7 Day Forecast for Marine Location Near National Harbor, MD

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Area Discussion for - Baltimore, MD/Washington

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FXUS61 KLWX 190740 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 340 AM EDT Sun Sep 19 2021

SYNOPSIS. A cold front will drop southward today as high pressure to our north settles over New England. Mostly dry and seasonable weather is slated through Tuesday. A strong cold front will pass through the area later Wednesday into Thursday and Canadian high pressure will build overhead late next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Aside from some patchy fog across portions of the region early this morning, conditions remain quiet across the CWA.

Rex blocking over the central US continues as upper level ridging gradually shifts eastward over the next few days. Surface high pressure to our north will shift over New England today, resulting in a weak cold front dropping southward. Dry conditions are expected today, aside from the slight chance for an isolated shower over the southern Potomac Highlands and the Central Shenandoah Valley as moisture advection over the Gulf states tries to nudge northward. However, given the influence from the high, thinking it should remain mostly dry. Otherwise, expect mostly sunny skies with temperatures in the upper 70s to low 80s across the region.

SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY/. Upper level ridge will crest over the Mid Atlantic region by early Monday morning as surface high pressure develops offshore; inducing an easterly flow. The high will reside offshore through Tuesday as mostly dry and seasonable weather is expected to continue during this time. As an upper level trough approaches from the west, cloud cover will increase late Tuesday as well as an increased chance for showers Tuesday night into Wednesday.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. For Wednesday, the aforementioned upper level trough will sharpen and become negatively tilted before eventually cutting off over the Ohio Valley into Thursday. A strong cold front associated with this system will push through late Wednesday into Thursday bringing rain to the entire region. Thinking the threat for severe weather is still low at this time, as instability still seems to be lacking. Even with a lot of shear present, still have to at least have a little bit of instability to work with, and no guidance is showing that at this time.

For Thursday night, expecting the rain to be gone and for skies to clear out with much cooler temperatures. Lows will reach the mid to upper 50s along/east of I-95, then the 40s to low 50s further west. May even see the potential for some frost across the Allegheny Front.

Friday through the weekend will be cooler, with highs in the low to mid 70s each day. The primary upper-low will try to spin through the region towards the end of the period, which could bring some showers and continued cooler temperatures.

AVIATION /08Z SUNDAY THROUGH THURSDAY/. Mainly VFR across the terminals early this morning with the exception of MRB and CHO which is MVFR due to fog. Guidance continues to indicate some lower VSBYs developing over MTN through daybreak as fog ensues. However IAD, BWI, and DCA are all expected to remain VFR at this time. Any fog is expected to quickly burn off shortly after daybreak. Calm winds will become more northerly today before shifting to the east later this afternoon.

Similar conditions are expected through Tuesday with pre-dawn fog mainly along and west of the Blue Ridge but generally VFR conditions along with a mix of sun and clouds during the daytime hours.

Sub-VFR conditions expected Wednesday into Thursday with a strong cold front pushing through the region. Thoughts on timing for now are late Wednesday into early Thursday for best rain chances. Conditions should return to VFR by late Thursday in the wake of the cold front.

MARINE. Northerly channeling is expected today with SCA conditions likely over the Chesapeake Bay. Winds relax this afternoon, but marginal SCA conditions could persist over the southern waters through early next week.

For Wednesday into Thursday, marine hazards are expected sometime during the period as a cold front passes over the waters.

TIDES/COASTAL FLOODING. A Coastal Flood Advisory is in effect for Annapolis. Anomalies have remain elevated over the last several hours however have been decreasing over the past hour. Nevertheless, the threat for minor flooding remains too close to call thus prompting the advisory.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . Coastal Flood Advisory until 7 AM EDT this morning for MDZ014. VA . None. WV . None. MARINE . Small Craft Advisory until 11 AM EDT this morning for ANZ531>534-539>541-543.

SYNOPSIS . SOUZA NEAR TERM . SOUZA SHORT TERM . SOUZA LONG TERM . CJL AVIATION . SOUZA/CJL MARINE . SOUZA/CJL TIDES/COASTAL FLOODING .

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WASD2 - 8594900 - Washington, DC	5 mi	52 min	NNE 5.1 G 8.9	74°F	78°F		1021.3 hPa
BSLM2 - Chesapeake Bay, MD	17 mi	70 min	NE 1	59°F			1021 hPa	58°F
APAM2 - 8575512 - Annapolis, MD	32 mi	52 min	NNW 6 G 9.9	76°F	79°F		1021.1 hPa
TPLM2 - Thomas Point, MD	32 mi	40 min	N 15 G 17	72°F	77°F		1022.2 hPa (+1.6)
44063 - Annapolis	33 mi	46 min	NNE 16 G 19	73°F	77°F	1 ft	1022.4 hPa
NCDV2	33 mi	52 min	N 1.9 G 4.1	76°F	79°F		1020.5 hPa
44062 - Gooses Reef, MD	37 mi	46 min	NNE 14 G 19	73°F	78°F	1 ft	1022.2 hPa
CPVM2	37 mi	52 min		73°F				62°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	39 mi	52 min	NE 6 G 8.9	71°F			1021.7 hPa
FSNM2	39 mi	52 min	N 8 G 14	70°F			1021.5 hPa
BLTM2 - 8574680 - Baltimore, MD	40 mi	52 min	ENE 8.9 G 15	71°F	79°F		1021.3 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD	44 mi	52 min	N 12 G 14	73°F			1021 hPa
SLIM2 - 8577330 - Solomons Island, MD	45 mi	52 min	NNE 9.9 G 12	74°F	79°F		1020.7 hPa

Wind History for Washington, DC

(wind in knots)    EDIT      (on/off)   Help

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Last 24hr

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NW3 G7

W2

S6

S4 G7

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NW1

W1

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NW2

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NE2 G5

N5 G9

NE4 G9

N5 G10

1 day ago

NE3 G7

N4 G7

NE1 G5

E1 G6

NE2

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E2 G5

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SE1

SE1

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2 days ago

N4 G7

N4 G8

SE2

NE1 G5

E1 G4

N9 G17

N3

W4

W1 G5

N2 G5

N2 G5

NE2 G5

NE2

NE4 G8

NE3 G6

NE4 G7

NE1 G4

SE1 G7

NE4

N3 G6

NE3 G7

NE2 G5

N3

NE2 G9

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Washington/Reagan National Airport, DC, VA	4 mi	48 min	NE 9	10.00 mi	A Few Clouds	74°F	62°F	67%	1021.9 hPa
Camp Springs / Andrews Air Force Base, MD	9 mi	44 min	NE 9	10.00 mi	Fair	71°F	63°F	77%	1021.8 hPa
Fort Belvoir, VA	9 mi	44 min	N 0	10.00 mi	Fair	74°F	65°F	73%	1021.9 hPa
College Park Airport, MD	14 mi	65 min	N 4	10.00 mi	Fair	70°F	63°F	78%	1021.7 hPa
Fort Meade / Tipton, MD	24 mi	45 min	N 5	10.00 mi	Fair	70°F	63°F	78%	1022.7 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)

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N5

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N5

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1 day ago

NE8

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2 days ago

N6

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W4

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N9

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Tide / Current Tables for Alexandria, Virginia

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Tide / Current Tables for Fort Washington, Maryland

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Weather Map

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GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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Ground Weather Radar Station

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