Tuesday, February18, 2020
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Marine Weather and Tides
Woodbridge, 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 6:55AMSunset 5:50PM Tuesday February 18, 2020 1:51 AM EST (06:51 UTC) Moonrise 3:32AMMoonset 1:13PM Illumination 29% Phase: Waning Crescent; Moon at 24 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- 1238 Am Est Tue Feb 18 2020
Overnight..SE winds 5 kt. Waves less than 1 ft.
Tue..S winds 5 to 10 kt. Waves 1 ft. A chance of rain.
Tue night..NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 kt. Waves less than 1 ft.
Thu..N winds 5 kt. Waves less than 1 ft.
Thu night..N winds 5 kt. Waves less than 1 ft.
Fri..W winds around 5 kt. Waves 1 ft.
Sat..SW winds around 5 kt. Waves 1 ft.
ANZ500 1238 Am Est Tue Feb 18 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore today as a cold front approaches the waters. The front will cross this evening. High pressure will return Wednesday. Small craft advisory conditions will be possible early Wednesday and again Thursday night into Friday.


7 Day Forecast for Marine Location Near Woodbridge, VA
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location: 38.65, -77.22     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 180153 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 853 PM EST Mon Feb 17 2020

SYNOPSIS. A cold front will move across the Mid Atlantic Tuesday evening. A strong area of high pressure will build over the region Wednesday through Friday.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. Increasing/thickening clouds tonight as warm air and moisture advection pattern strengthens. Low clouds will start developing after 09Z toward daybreak, but still looks like rain will hold off until after 12Z Tue.

SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/.

Rain will be slow to arrive into our area Tue, most likely after 15Z and spread across the rest of the area in the mid to late afternoon hours. Generally looking at 0.1 to 0.25 inches of rain before it starts shifting south Tue evening with frontal passage.

LONG TERM /THURSDAY THROUGH MONDAY/. Temperatures on Thursday and Friday will be about 5-10 degrees cooler than seasonal averages, as Arctic high pressure builds into the central U.S. Highs in the mid to upper 30s and lows in the low 20s can be expected during this time. Should remain mostly dry during this period as well. However, an area of low pressure will slide by to our south Thursday afternoon through Friday morning, and this system will have to be watched. A northwest trend has been noted in recent model runs with this system, bringing the precip shield closer and closer to our region. With an Arctic air mass in place, the precip type will be snow if it reaches the area. Some light snow is possible across the region Thursday afternoon, as we will be in the right entrance region of a strong (150+ kt) upper- level jet. Amounts would likely be light, and at this point, look to have little impact given the time of day. Have left PoPs out of the forecast for now until more certainty can be reached. The surface low passes by overnight into early Friday, with the precip shield potentially clipping our southern regions, but looking at light amounts again. Certainty is low with this system, as we could continue to see more of a northwest trend in track, and potentially see more, or it could trend back south and we see nothing. Either way, it is something to keep an eye on. By mid-late morning on Friday though, precip will be gone, with cold temperatures remaining.

High pressure will slide by to our south and then offshore through Sunday. This will result in moderating temperatures each day and more dry weather. Highs on Saturday will reach the mid 40s to near 50. Then on Sunday, highs will rebound into the mid-50s.

AVIATION /02Z TUESDAY THROUGH SATURDAY/. MVFR conditions possible Tuesday morning but IFR is not out of the question for periods Tuesday morning into the afternoon. -RA expected over the terminals at some point on Tuesday, with Tuesday afternoon more likely. Front will move through Tuesday evening and high pressure will build in Tuesday night and remain in control into Wednesday night. Gusty NW winds will develop behind the front late Tuesday night into part of Wednesday.

Generally expecting VFR conditions at all terminals through Friday. However, some light snow is possible Thursday afternoon into the overnight hours near CHO. Chances are pretty low at this point, but something to keep an eye on.

MARINE. Winds are expected to remain light through Tuesday with rain moving over the waters ahead of the front. Behind the front Tuesday night, NW winds will increase and a Small Craft Advisory may be needed from late Tuesday night into midday Wednesday. High pressure will build from the west Wednesday and will be on the decrease through the day and into the night.

Northerly flow on Thursday will become quite gusty in the afternoon, nearing SCA criteria on the Bay. Then, an area of surface low pressure will slide by to the south Thursday night into Friday morning, with SCA conditions likely during that time. Winds will diminish into Friday afternoon, as the system slides out to sea.

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

SYNOPSIS . LFR NEAR TERM . LFR SHORT TERM . IMR 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 19 mi52 min 42°F 44°F1025.6 hPa (-0.4)
NCDV2 25 mi58 min 43°F 45°F1024.5 hPa
BSLM2 - Chesapeake Bay, MD 29 mi142 min Calm 1025 hPa
TPLM2 - Thomas Point, MD 45 mi52 min E 6 G 6 41°F 42°F1026.7 hPa (-0.3)34°F
APAM2 - 8575512 - Annapolis, MD 46 mi52 min 42°F 1025.4 hPa (+0.0)
SLIM2 - 8577330 - Solomons Island, MD 47 mi52 min 42°F 44°F1025.4 hPa (-0.4)

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA6 mi1.9 hrsN 010.00 miMostly Cloudy36°F25°F64%1025.7 hPa
Quantico Marine Corps Airfield - Turner Field, VA11 mi56 minSSE 510.00 miFair42°F32°F68%1025.8 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA17 mi56 minS 410.00 miMostly Cloudy41°F28°F62%1025.5 hPa
Washington/Reagan National Airport, DC, VA18 mi60 minS 610.00 miOvercast42°F33°F71%1025.5 hPa
Stafford, Stafford Regional Airport, VA21 mi57 minN 010.00 miFair38°F29°F74%1026.4 hPa
Camp Springs / Andrews Air Force Base, MD22 mi56 minSE 810.00 miFair39°F31°F73%1025.9 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmN6N4NW3E3CalmE4E3SE5E3CalmCalmCalmCalmCalmCalmCalm
1 day agoSE4S4CalmCalmCalmCalmCalmS3S3CalmCalmCalmS4S4S5S8CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmNW3CalmCalmCalmCalmSE6S4SE6SE6SW7S4SE9SE5S3SE5SE3SE4SE3S4SE5SE5

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Tue -- 02:36 AM EST     1.40 feet High Tide
Tue -- 03:31 AM EST     Moonrise
Tue -- 06:56 AM EST     Sunrise
Tue -- 08:53 AM EST     0.03 feet Low Tide
Tue -- 01:13 PM EST     Moonset
Tue -- 02:56 PM EST     1.59 feet High Tide
Tue -- 05:49 PM EST     Sunset
Tue -- 09:54 PM EST     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.21.41.41.20.90.50.30.100.20.50.91.31.51.61.51.20.90.60.40.1-00.2

Tide / Current Tables for Deep Point, Mattawoman Creek, Potomac River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (1,6,7,8)
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Ground Weather Radar Station Sterling, VA
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Disclaimer:
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.