Saturday, May30, 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 5:44AMSunset 8:28PM Saturday May 30, 2020 9:00 PM EDT (01:00 UTC) Moonrise 12:25PMMoonset 1:12AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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- 736 Pm Edt Sat May 30 2020
Tonight..N winds 5 to 10 kt. Waves 1 ft.
Sun..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sun night..N winds 5 to 10 kt. Waves 1 ft.
Mon..NW winds 5 to 10 kt. Waves 1 ft.
Mon night..SW winds around 5 kt. Waves 1 ft.
Tue..SW winds around 5 kt. Waves 1 ft.
Tue night..SW winds around 5 kt. Waves 1 ft.
Wed..W winds around 5 kt. Waves 1 ft. A chance of showers and tstms through the night.
Thu..N winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 736 Pm Edt Sat May 30 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Front will cross the waters overnight as high pressure builds into the region through early next week as a northerly breezes persists. A small craft advisory may be needed for portions of the waters Sunday night into early Monday morning.


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 310053 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 853 PM EDT Sat May 30 2020

SYNOPSIS. A secondary cold front will press through the area tonight as high pressure over the Upper Midwest builds eastward through early next week. Low pressure passing north of the Great Lakes will aim to lift a warm front through the area the middle portion of next week. A cold front may approach the region thereafter, potentially stalling to our south heading into next weekend.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. No changes necessary to going forecast. The secondary front has pushed through most of the area, returning dewpoints to the lower 50s. Still have higher humidity levels in central Virginia and along the Bay but this should be short-lived. Low temperatures will bottom out in the upper 40s in the mountains to mid-upper 50s in the cities and near the Bay as dry conditions persist.

SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY NIGHT/. High pressure centered over the Upper Midwest on Sunday will build southeastward toward and over the region through Monday night. Mostly clear skies, below normal temperatures, and dry conditions will be the resultant weather. Highs Sunday and Monday will hold in the low to middle 70s, with overnight lows falling back into 40s to middle 50s. Low temperatures in the 30s not out of the question Sunday night in the higher elevations of the Alleghenies.

Mid-upper level clouds will increase Monday night as we reside on the eastern periphery of an upper ridge and a weak shortwave seems poised to drop southeastward from the Great Lakes. Will hold on to a dry forecast Monday night, but wouldn't be surprised if low end chance POPs sneak in at some point, at least across northern Maryland and eastern West Virginia.

LONG TERM /TUESDAY THROUGH SATURDAY/. There will be a chance of showers Tue preceding a warm frontal passage Wed. It should turn very warm to hot Wed with high temperatures in the low 90s. Isold afternoon convection is possible Wed in hot and humid air mass and again Thu as cold front crosses the region. Front is expected to drop south Fri, but high pressure building behind isn't very strong with pressure values in the 1013- 1015 mb range. This typically isn't strong enough to push cold fronts through the area in the summertime.

AVIATION /01Z SUNDAY THROUGH THURSDAY/. VFR dominates tonight through Monday and winds continue to trend northerly. Winds will gust upwards of 20 knots Sunday morning and early afternoon before relaxing. High pressure will build over the terminals Sunday night through Monday night, with continued light winds and dry conditions expected.

Increasing shower chances on Tuesday as high pressure shifts offshore and a warm front lifts toward the region, and winds turn southerly. Shower/storm chances continue Wednesday into Thursday, with brief periods of sub VFR conditions plausible.

MARINE. A reinforcing cold front will push through the region tonight, delivering gusty northwest winds in its wake Sunday morning and early Sunday afternoon. A Small Craft Advisory is in effect for the main stem of the Chesapeake Bay and adjoining estuaries after midnight and into midday Sunday. Have opted to add the lower tidal Potomac to the Advisory area.

Thereafter, high pressure will build over the waters Sunday night through Monday night with mainly light northerly winds. Cooler temperatures Sunday night into early Monday morning may allow for enough mixing to occur under northerly channeling over the main stem of the Bay. An SCA may be needed for a portion of the waters as a result, but confidence is not high enough at this time.

Primarily sub-SCA conditions expected on Tuesday as temperatures warm and the flow turns more southerly as high pressure migrates off the coast. The gradient increases Wednesday and Wednesday night as low pressure tracks well north of the waters and a frontal boundary approaches from the north as well. This will bring the threat for afternoon/evening showers and storms, which may require the issuance of Special Marine Warnings.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 1 AM to 2 PM EDT Sunday for ANZ530>534-537>543.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 19 mi61 min W 1.9 G 5.1 80°F 75°F1013.7 hPa (-0.0)
NCDV2 25 mi61 min Calm G 1 78°F 75°F1012.8 hPa (-0.0)
BSLM2 - Chesapeake Bay, MD 29 mi151 min Calm 1012 hPa
44062 - Gooses Reef, MD 43 mi43 min WNW 1.9 G 1.9 73°F
TPLM2 - Thomas Point, MD 45 mi61 min S 5.1 G 6 75°F 69°F1014.4 hPa (-0.0)56°F
44063 - Annapolis 46 mi37 min 71°F 69°F1 ft1013.4 hPa
APAM2 - 8575512 - Annapolis, MD 46 mi61 min 77°F 1013 hPa (-0.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi61 min WNW 1.9 G 2.9 1013.8 hPa (-0.0)
SLIM2 - 8577330 - Solomons Island, MD 47 mi61 min NNW 1 G 1 77°F 69°F1013.2 hPa (-0.0)

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA6 mi65 minN 010.00 miPartly Cloudy74°F58°F58%1013.8 hPa
Quantico Marine Corps Airfield - Turner Field, VA11 mi65 minno data8.00 miA Few Clouds77°F59°F54%1013.9 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA17 mi65 minN 610.00 miOvercast78°F54°F43%1014.4 hPa
Washington/Reagan National Airport, DC, VA18 mi69 minN 510.00 miPartly Cloudy78°F52°F40%1013.6 hPa
Stafford, Stafford Regional Airport, VA21 mi66 minN 010.00 miPartly Cloudy73°F63°F72%1014.9 hPa
Camp Springs / Andrews Air Force Base, MD22 mi65 minWNW 310.00 miA Few Clouds78°F49°F37%1014 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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1 day agoCalmSE4SE5SE5S6S5SE4SE5SE6S3SE6S4S4S6S6SE10S8S11
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2 days agoSE3CalmSE3CalmE5SE4SE4SE4SE5SE6SE7SE8SE8SE10SE8SE8SE5S4SE5SE7SE9SE7SE7SE5

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Sat -- 01:27 AM EDT     1.72 feet High Tide
Sat -- 02:11 AM EDT     Moonset
Sat -- 05:46 AM EDT     Sunrise
Sat -- 08:04 AM EDT     0.33 feet Low Tide
Sat -- 01:25 PM EDT     Moonrise
Sat -- 01:45 PM EDT     1.76 feet High Tide
Sat -- 08:26 PM EDT     Sunset
Sat -- 08:37 PM EDT     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.71.71.51.20.90.60.40.30.40.71.11.51.71.71.61.310.60.40.20.20.40.8

Tide / Current Tables for Deep Point, Mattawoman Creek, Maryland
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Deep Point
Click for Map
Sat -- 01:18 AM EDT     1.75 feet High Tide
Sat -- 02:11 AM EDT     Moonset
Sat -- 05:46 AM EDT     Sunrise
Sat -- 07:54 AM EDT     0.33 feet Low Tide
Sat -- 01:25 PM EDT     Moonrise
Sat -- 01:35 PM EDT     1.79 feet High Tide
Sat -- 08:26 PM EDT     Sunset
Sat -- 08:27 PM EDT     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.71.71.51.20.80.60.40.30.40.71.21.61.81.81.61.30.90.60.40.20.20.40.9

Weather Map
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wmap_A
GEOS Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (21,6,7,8)
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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.