Sunday, February23, 2020
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Marine Weather and Tides
Fort Washington, MD

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:47AMSunset 5:55PM Sunday February 23, 2020 11:30 AM EST (16:30 UTC) Moonrise 7:10AMMoonset 5:59PM Illumination 0% Phase: New Moon; Moon at 0 days in cycle
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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 938 Am Est Sun Feb 23 2020
Rest of today..S winds 5 kt. Waves less than 1 ft.
Tonight..S winds 5 kt. Waves less than 1 ft.
Mon..S winds around 5 kt. Waves 1 ft.
Mon night..S winds around 5 kt. Waves 1 ft. Rain.
Tue..SE winds around 5 kt. Waves 1 ft. Rain likely.
Tue night..NE winds around 5 kt. Waves 1 ft.
Wed..W winds around 5 kt. Waves 1 ft. Showers.
Thu..W winds 5 to 10 kt. Waves 1 ft.
ANZ500 938 Am Est Sun Feb 23 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain just south of the waters this weekend. Low pressure will pass through the ohio valley Monday into Tuesday and another low will pass through the waters Wednesday. A strong cold front associated with this low will pass through late Wednesday into Wednesday night. Canadian high pressure will build overhead late in the week.


7 Day Forecast for Marine Location Near Fort Washington, MD
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location: 38.72, -77.03     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 231442 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 942 AM EST Sun Feb 23 2020

SYNOPSIS. High pressure will remain to our south through tonight. Low pressure will track into the Ohio Valley late Monday into Tuesday, with another area of low pressure and its associated cold front crossing the region Wednesday into Wednesday night. Canadian high pressure will build overhead for the latter portion of next week.

NEAR TERM /THROUGH TONIGHT/. High pressure will remain centered to the south through tonight. A return southerly flow will usher in mild conditions this afternoon with plenty of sunshine, and some thin high clouds. Temperatures should run a few degrees warmer than yesterday, with upper 50s common, and even some low 60s from Fredericksburg to Charlottesville.

High clouds will gradually increase through the overnight well in advance of a system located over the center of the country. No rain is expected, but the increase in cloud cover, coupled with light southerly winds and rising dewpoints should act to keep temperatures warmer compared to previous nights. Lows overnight tonight will be in the 30s.

SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/. On Monday, a mid-level shortwave and associated surface low will track from Oklahoma toward the Ohio Valley. As it does so, the mid-level wave will be in the process of deamplifying as a more substantial trough builds into the center of the country. Mid- high level clouds will continue to increase well in advance of the system during the day on Monday, but it appears as though most of the day should stay dry.

Late Monday afternoon through Monday Night, a push of low-mid level warm advection out ahead of the system will occur, leading to the development of showers. This shower activity should be light in nature, with precipitation totals of under a quarter inch for most. By Tuesday morning, what's left of the rapidly deamplifying lead wave will be located off to our north, leaving us in deep-layer southwesterly flow in advance of the larger trough over the center of the country. With the main trough still far away, mid-level heights are expected to hold nearly steady across the area on Tuesday. As low-level warm advection in response to the decaying lead wave wanes, shower coverage is expected to decrease through the day. Low clouds will remain however, making for a dreary day. Much of the same is expected Tuesday Night, with cloud cover persisting, but minimal chances for rain showers.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Low pressure will be developing across central VA Wed and will be strengthening as it tracks northeast into New England. This time, however, low pressure will be tracking farther east and will be weaker than the one that crossed the area Feb 07 which produced the five tornadoes across parts of MD and VA. So, not expecting severe wx this time around, the risk of t-storms appears low anyway but is non-zero.

Showers will linger through midnight Wed night until trough axis crosses the area. Showers will turn into snow showers over the Appalachians with minor accumulations likely. Blustery NW flow will follow behind frontal passage Wed night and persist through the end of the week. As opposed to the past few cold snaps which lasted just a couple days, this time cold air will stick around longer into early March as deep trough pattern persist over the eastern NOAM. A moderating trend in temperatures is expected to begin toward the middle of next week March 03-04.

AVIATION /15Z SUNDAY THROUGH THURSDAY/. Sunny skies and light southerly winds are expected at all of the terminals through this afternoon. High clouds will move in by late tonight, but conditions will stay VFR. VFR conditions will persist tomorrow, but a few light rain showers can't be ruled out during the late afternoon. Conditions will drop to sub-VFR Monday Night as lower clouds and showers move in, with sub-VFR conditions lingering through much of the day Tuesday.

Showers on Wed-Wed night may produce brief periods of MVFR cig restrictions. Main impact will be from strengthening NW winds Wed afternoon through the weekend with gusts in the 25-30kt range.

MARINE. Light southerly winds are expected over the waters through Tuesday. Winds are expected to stay below SCA levels during this time. Skies will be sunny today, with increasing clouds tonight and tomorrow, and showers moving in tomorrow night into Tuesday.

SCA conditions are likely Wed afternoon into Friday. Low risk for gale conditions Thursday.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . None.

SYNOPSIS . BJL NEAR TERM . BJL/KJP SHORT TERM . KJP LONG TERM . LFR AVIATION . BJL/LFR/KJP MARINE . BJL/LFR/KJP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 11 mi42 min S 4.1 G 5.1 44°F 43°F1025 hPa
BSLM2 - Chesapeake Bay, MD 18 mi120 min SSE 4.1 1024 hPa
NCDV2 28 mi48 min ESE 4.1 G 5.1 42°F 46°F1024.6 hPa
APAM2 - 8575512 - Annapolis, MD 34 mi42 min 44°F 1024.3 hPa
TPLM2 - Thomas Point, MD 34 mi30 min S 8 G 8.9 39°F 42°F1025.8 hPa (-0.7)37°F
44062 - Gooses Reef, MD 35 mi24 min SSW 3.9 G 3.9 42°F 1025.4 hPa
CPVM2 39 mi42 min 40°F
SLIM2 - 8577330 - Solomons Island, MD 41 mi42 min E 1 G 1.9 45°F 43°F1025 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 44 mi42 min Calm G 1 42°F 1024.6 hPa
FSNM2 44 mi60 min SSE 1.9 G 4.1 45°F 1024.1 hPa
BLTM2 - 8574680 - Baltimore, MD 45 mi48 min S 1.9 G 2.9 45°F 43°F1024.2 hPa
PPTM2 - 8578240 - Piney Point, MD 48 mi42 min SE 1.9 G 1.9

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi94 minN 010.00 miFair44°F22°F43%0 hPa
Washington/Reagan National Airport, DC, VA10 mi38 minS 610.00 miFair49°F23°F36%1025 hPa
Camp Springs / Andrews Air Force Base, MD11 mi34 minN 010.00 miFair51°F11°F20%1025.2 hPa
College Park Airport, MD19 mi42 minN 010.00 miFair49°F8°F19%1024.4 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi34 minSSW 510.00 miFair46°F26°F46%1025.7 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrS3SW7W5SW5S4S4S3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE4
1 day agoNW6NW7NW6NW10NW6N3NW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3
2 days agoCalmCalmCalmN3N3NW4CalmCalmCalmCalmN7N7N11
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Tide / Current Tables for Riverview, Potomac River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Alexandria, Virginia
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Alexandria
Click for Map
Sun -- 02:26 AM EST     0.01 feet Low Tide
Sun -- 06:49 AM EST     Sunrise
Sun -- 07:09 AM EST     Moonrise
Sun -- 08:07 AM EST     2.65 feet High Tide
Sun -- 10:33 AM EST     New Moon
Sun -- 02:35 PM EST     -0.05 feet Low Tide
Sun -- 05:54 PM EST     Sunset
Sun -- 05:59 PM EST     Moonset
Sun -- 08:28 PM EST     2.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.50.10.10.61.31.92.42.62.521.40.80.40-00.41.11.92.42.72.72.31.8

Weather Map
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wmap_A
GEOS Local Image of Mid-Atlantic    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (11,2,3,4)
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Ground Weather Radar Station Sterling, VA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.