Sunday, March29, 2020
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Marine Weather and Tides
Belle Haven, VA

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 6:54AMSunset 7:30PM Sunday March 29, 2020 11:54 PM EDT (03:54 UTC) Moonrise 8:53AMMoonset 11:37PM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 1137 Pm Edt Sun Mar 29 2020
.small craft advisory in effect from 10 am edt Monday through late Monday night...
Rest of tonight..N winds 5 kt. Waves less than 1 ft.
Mon..SE winds 5 kt...becoming W 10 to 15 kt with gusts to 25 kt in the late morning and afternoon. Waves 1 ft.
Mon night..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Tue..N winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 ft.
Tue night..E winds 5 kt. Waves less than 1 ft. A chance of showers.
Wed..NE winds 5 kt. Waves less than 1 ft. A chance of rain.
Wed night..NW winds 5 kt. Waves less than 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
Fri..S winds around 5 kt. Waves 1 ft.
ANZ500 1137 Pm Edt Sun Mar 29 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak surface ridge will build over the waters overnight followed by a surface trof Monday afternoon. Low pressure will pass to the south Tuesday night into Wednesday. A small craft advisory will likely be needed for Tuesday night and Wednesday.


7 Day Forecast for Marine Location Near Belle Haven, VA
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location: 38.78, -77.05     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 300114 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 914 PM EDT Sun Mar 29 2020

SYNOPSIS. Weak surface ridge will build in overnight. A surface trof will move across the area Monday afternoon. Low pressure tracks to our south Tuesday night into Wednesday morning, bringing more rain chances. High pressure returns for the end of the week.

NEAR TERM /THROUGH MONDAY/.

Dryline like feature moved past the I-81 corridor earlier today where temperatures reached 88F at CHO and dewpoints fell into the 20s at Staunton, but dryline like feature has stalled as nighttime microphysics RGB and split window difference products clearly depict a moisture discontinuity from western Washington County arcing southeastward through Winchester, Warrenton, and City of Fredericksburg. A wedge of low clouds has been surging southwestward from northeast MD and now reaches central MD. Short-term guidance is having lots of problems handling this wedge of low clouds. GLAMP seems to be doing the best so far and it shows low clouds reaching as far south as DC and southern MD. Look for this trend to persist overnight given dryline feature has stalled until daybreak arrives and better mixing commences.

Breezy to windy conditions with wind gusts 30-40 mph highest in western areas. It will be cooler for some in the southwest, but warmer in the northeast. It will be very dry and breezy for fire weather concerns, fortunately, most people had enough wetting rains Fri night and Sat to prevent fuels from drying out. The only exception was along the I-64 corridor where not enough wetting rains fell. An SPS for elevated fire wx conditions may be needed Monday.

SHORT TERM /MONDAY NIGHT THROUGH TUESDAY NIGHT/. A deep cyclone will be passing along the US-Canadian border Monday. There will be enough of a pressure gradient and cold advection to keep the atmosphere fairly well mixed. But with ample sunshine temperatures should be able to reach the 60s to near 70s.

Upper-level shortwave energy will be ejecting out of the southern Plains into the southeastern U.S. on Tuesday. Attendant surface low pressure will be maturing over the southeast throughout the day as it tracks towards the east. Latest global guidance keeps the surface low well to the south of our area. However, the northern shield of precipitation looks likely to have an impact across central VA. Best chance of precipitation looks to be Tuesday night into the early morning hours on Wednesday. Additionally, there will be cool enough air aloft for some potential wintry precipitation in the higher elevations of the central VA Blue Ridge and the lower Potomac Highlands of western VA. Of course, if the track of this low shifts even slightly north, could see more precipitation across those region, and perhaps even a farther northward extent of precip. Guidance is in pretty good agreement at this point though. Temperatures will only reach the mid 50s.

LONG TERM /WEDNESDAY THROUGH SUNDAY/. With flow out of the east to east-northeast on Wednesday, would expect low clouds/drizzle around after the low departs early in the day. Northerly flow will then quickly return around midday or so, as high pressure begins to build in out of the northwest, which should scour out the low clouds/drizzle by early afternoon. High temperatures will only reach the low to mid 50s Wednesday.

High pressure then slides by to the north Thursday and Friday, with dry and seasonable conditions expected, with highs in the low to mid 60s each day. Thursday will be slightly cooler though, as the high will be more directly overhead.

A cold front will then push through on Saturday, bringing the next chance for some rain. At this point, looks like this will be fairly light, as the surface low and upper-level energy pass by well to the north. Still plenty of time for that to change though, so will be something to keep track of.

AVIATION /01Z MONDAY THROUGH FRIDAY/. Low clouds with IFR cigs have surging southward past few hours from northeast to central MD. GLAMP shows cig restrictions developing as far south as DCA overnight. Thinking is more stratus rather than fog, but short-term guidance show both becoming a problem overnight.

Light NW flow early Tuesday will gradually turn to easterly by Tuesday evening, as low pressure tracks well to our south. This will still likely result in low clouds/drizzle Tuesday evening through early Wednesday morning, where sub-VFR conditions will continue likely through midday. CHO stands the best chance for visibility reducing rainfall, but still thinking heaviest precipitation stays farther south.

VFR returns Wednesday afternoon through Friday, as high pressure builds into the region from the northwest.

MARINE. Will issue SCA for tomorrow through Mon evening.

Northwest flow will commence tonight, and may be gusty with better momentum transfer on Monday. Have not issued Small Craft Advisories yet based on water temperatures.

Strengthening low pressure will pass by well to our south Tuesday night into Wednesday morning. This will lead to gusty easterly winds Tuesday night, gradually turning northerly and lightening up by Wednesday afternoon. Small Craft Advisories are likely starting late Tuesday night through Wednesday. The strongest winds over our forecast area will be in the central Chesapeake Bay. Can't rule out a period of Gale force gusts Wednesday morning either, so will have to monitor that as we get closer to the event.

SCA could extend into Thursday thanks to northerly channeling as the high pressure builds in from the northwest. But SCA conditions should end Thursday night and into Friday, as high pressure builds more directly overhead.

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

SYNOPSIS . LFR NEAR TERM . LFR SHORT TERM . HTS/CJL LONG TERM . CJL AVIATION . LFR/CJL MARINE . LFR/CJL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 7 mi54 min NNE 1.9 G 5.1 57°F 55°F1010.9 hPa (+2.6)
BSLM2 - Chesapeake Bay, MD 18 mi144 min N 5.1 1009 hPa
NCDV2 32 mi60 min Calm G 1 58°F 57°F1009.6 hPa
APAM2 - 8575512 - Annapolis, MD 33 mi54 min 53°F 1010.1 hPa (+1.8)
TPLM2 - Thomas Point, MD 34 mi54 min N 8.9 G 8.9 52°F 51°F1011.4 hPa (+2.0)52°F
CPVM2 38 mi54 min 52°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 41 mi54 min ENE 1.9 G 2.9 54°F 1010.5 hPa (+1.4)
FSNM2 41 mi66 min NNE 4.1 G 5.1 54°F 1010.4 hPa
BLTM2 - 8574680 - Baltimore, MD 42 mi54 min NE 2.9 G 2.9 55°F 53°F1010.3 hPa (+1.5)
COVM2 - 8577018 - Cove Point LNG Pier, MD 44 mi54 min NNW 13 G 17 1010.7 hPa (+2.4)
SLIM2 - 8577330 - Solomons Island, MD 45 mi54 min N 8 G 12 53°F 53°F1009.9 hPa (+2.1)

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Washington/Reagan National Airport, DC, VA6 mi62 minNNE 59.00 miA Few Clouds55°F53°F93%1010.8 hPa
Fort Belvoir, VA8 mi2 hrsN 010.00 miFair60°F53°F80%1010.1 hPa
Camp Springs / Andrews Air Force Base, MD10 mi58 minNNE 62.25 miFog/Mist54°F53°F99%1010.8 hPa
College Park Airport, MD15 mi69 minN 05.00 miMostly Cloudy53°F50°F92%1010.8 hPa
Quantico Marine Corps Airfield - Turner Field, VA23 mi2 hrsNNE 139.00 miFair63°F0°F%1010.2 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)
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Last 24hrNE6N3NE3N6NE8NE5E4CalmNE4NE3CalmCalmS5E10S8S5S7S6CalmCalmNE13NE12NE7NE5
1 day agoS3CalmN3CalmS4CalmNE6NE5E4E9E10E6S4E5E3E6E7E6E7NE11NE7N15NE11NE8
2 days agoS8S10S3S4S4S3CalmSW4CalmNW66NE5N5NE7N7N4N9N7NE3CalmSE9S4S6Calm

Tide / Current Tables for Alexandria, Virginia
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Alexandria
Click for Map
Sun -- 12:03 AM EDT     2.71 feet High Tide
Sun -- 06:05 AM EDT     0.39 feet Low Tide
Sun -- 06:56 AM EDT     Sunrise
Sun -- 09:53 AM EDT     Moonrise
Sun -- 12:00 PM EDT     3.12 feet High Tide
Sun -- 07:01 PM EDT     0.43 feet Low Tide
Sun -- 07:29 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.72.62.21.610.60.40.50.81.52.42.93.132.51.91.30.90.50.40.50.91.62.3

Tide / Current Tables for Mount Vernon, Virginia
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Mount Vernon
Click for Map
Sun -- 05:40 AM EDT     0.32 feet Low Tide
Sun -- 06:56 AM EDT     Sunrise
Sun -- 09:53 AM EDT     Moonrise
Sun -- 11:35 AM EDT     2.46 feet High Tide
Sun -- 06:36 PM EDT     0.35 feet Low Tide
Sun -- 07:29 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.91.51.10.60.40.30.50.91.52.12.42.42.21.81.30.90.60.40.40.511.51.9

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 (23,6,7,8)
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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.