Sunday, April5, 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 6:44AMSunset 7:37PM Sunday April 5, 2020 2:47 PM EDT (18:47 UTC) Moonrise 3:47PMMoonset 4:37AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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- 138 Pm Edt Sun Apr 5 2020
This afternoon..SW winds 5 kt. Waves less than 1 ft.
Tonight..W winds 5 kt. Waves less than 1 ft. A chance of showers.
Mon..N winds 5 kt. Waves less than 1 ft.
Mon night..S winds around 5 kt. Waves 1 ft.
Tue..SW winds around 5 kt. Waves 1 ft. A chance of showers.
Tue night..SW winds around 5 kt. Waves 1 ft. A chance of showers and tstms.
Wed..N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Thu..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 138 Pm Edt Sun Apr 5 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak and slow moving cold front will drop south across the region tonight with weak high pressure building in Monday. The front will lift back north as a warm front on Tuesday. A low pressure system will approach from the midwest on Wednesday. Small craft advisory may be needed for the second half of 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 051841 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 241 PM EDT Sun Apr 5 2020

SYNOPSIS. A weak and slow moving cold front will drop south across the region tonight with weak high pressure building in Monday. The front will lift back north on Tuesday. A low pressure system will approach from the west on Wednesday.

NEAR TERM /THROUGH TONIGHT/. Latest surface analysis places a slow moving front just west of our CWA as southwesterly flow is observed across our region. This has allowed the temperatures to reach the upper 60s and low 70s in some areas. A few isolated showers are also observed on radar and this is expected to continue as this front approaches, as the showers become more scattered. HREF suggests that marginal instability with CAPE near 500 J/kg will develop later this afternoon and evening over higher elevations, but not too confidence that any thunderstorm development.

The front will be south of our region late tonight and winds will become NW behind it. As the front moves across the chance of showers will be decreasing starting over the NW portion of our CWA but chance of showers will remain near the front over central VA and southern MD tonight. Low temperatures tonight will be in the mid 40s and mid 50s.

SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/. A front will be stalled just south of our area into Monday night while high pressure is centered over the Great Lakes, and ridging sits aloft. Dry conditions expected over our region except for maybe a few isolated showers over higher elevations near central VA. The front will lift north on Tuesday and along with shortwave energy aloft, showers and thunderstorms are expected across our region into Tuesday night.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Low pressure will push off the NY/NJ coast Wednesday. Uncertain how much cooler it will be despite cold advection aloft. Latest guidance continues to suggest the opposite . due to compressional warming, it will be the warmest day of the week. Doubt it will be a full-day washout, but timing the showers will depend on model of choice (there is still some spread).

As shortwave energy carves out a sharper trough axis, it will be able to drive a more substantive cold front across the Northeast/Mid Atlantic Thursday afternoon-evening. This front exhibits good thermal packing, so suspect there will be a wind field to drive this advection. Once again, showers are likely.

High pressure will be building into the area Friday-Saturday.

AVIATION /SUNDAY THROUGH FRIDAY/. VFR conditions expected over the terminals for the rest of today and tonight. A few showers could move over the terminals this afternoon and tonight with a frontal boundary moving through our region. Front will linger to our south through Monday night allowing for VFR conditions. Some showers could move near CHO. The front will return north on Tuesday and showers and thunderstorm cold impact some of the terminals.

Flight restrictions possible Wed-Thu due to showers. These restrictions should be transitory.

MARINE. Winds are expected to expected to remain below Small Craft Advisory criteria through Tuesday night. Brief periods of gusty winds near criteria could occur this evening and overnight, if needed a Marine Weather Statement could be issued.

Winds may not be able to mix to the waters surface Wednesday into Thursday due to how warm it will be. Momentum will be there. The best chance may come late Thursday behind a cold front.

TIDES/COASTAL FLOODING. Advisories and warnings are in effect through Monday morning. Even as anomalies begin to decrease Monday afternoon, minor coastal flooding is still possible through Tuesday.

LWX WATCHES/WARNINGS/ADVISORIES. DC . Coastal Flood Advisory until noon EDT Monday for DCZ001. MD . Coastal Flood Advisory until 4 AM EDT Monday for MDZ018. Coastal Flood Advisory until 11 AM EDT Monday for MDZ508. Coastal Flood Advisory until 9 AM EDT Monday for MDZ011. Coastal Flood Warning until 7 AM EDT Monday for MDZ014. Coastal Flood Advisory until 5 AM EDT Monday for MDZ016. Coastal Flood Warning until 4 AM EDT Monday for MDZ017. VA . Coastal Flood Advisory until 5 AM EDT Monday for VAZ057. Coastal Flood Advisory until noon EDT Monday for VAZ054. WV . None. MARINE . None.

SYNOPSIS . LFR NEAR TERM . IMR SHORT TERM . IMR LONG TERM . HTS AVIATION . IMR/HTS MARINE . HTS TIDES/COASTAL FLOODING . LFR/IMR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 11 mi48 min SSE 6 G 8 61°F 56°F1017.9 hPa (-1.7)
NCDV2 28 mi48 min E 8.9 G 9.9
APAM2 - 8575512 - Annapolis, MD 34 mi48 min 60°F 1017.5 hPa (-1.2)
TPLM2 - Thomas Point, MD 34 mi48 min SE 12 G 12 55°F 51°F1018.9 hPa (-1.4)49°F
44062 - Gooses Reef, MD 35 mi24 min SSE 14 G 16 54°F
CPVM2 39 mi48 min 56°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 41 mi48 min SSE 12 G 14 1019 hPa (-0.9)
SLIM2 - 8577330 - Solomons Island, MD 41 mi48 min ESE 9.9 G 11 56°F 55°F1018.3 hPa (-1.1)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 44 mi48 min ESE 7 G 8 58°F 1017.5 hPa (-1.3)
FSNM2 44 mi60 min E 6 G 7 60°F 1017.4 hPa
BLTM2 - 8574680 - Baltimore, MD 45 mi48 min S 2.9 G 5.1 62°F 51°F1017.2 hPa (-1.3)
PPTM2 - 8578240 - Piney Point, MD 48 mi48 min ESE 5.1 G 6

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi1.9 hrsSSE 610.00 miA Few Clouds63°F45°F53%1018.9 hPa
Washington/Reagan National Airport, DC, VA10 mi56 minS 710.00 miMostly Cloudy64°F48°F56%1018.1 hPa
Camp Springs / Andrews Air Force Base, MD11 mi52 minWSW 1010.00 miPartly Cloudy66°F45°F47%1018.3 hPa
College Park Airport, MD19 mi62 minS 510.00 miMostly Cloudy63°F40°F43%1017.9 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi2.9 hrsSE 710.00 miFair57°F0°F%1019.5 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrNE3E3NE3CalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3SW3S7S9S6W5
1 day agoNW13
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N6N3--N5NW4CalmN3N3NW4N4N4N5NW6NW8NE5N4CalmNW5
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Tide / Current Tables for Riverview, Maryland
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Riverview
Click for Map
Sun -- 12:30 AM EDT     0.24 feet Low Tide
Sun -- 05:37 AM EDT     Moonset
Sun -- 06:13 AM EDT     2.85 feet High Tide
Sun -- 06:45 AM EDT     Sunrise
Sun -- 12:51 PM EDT     0.17 feet Low Tide
Sun -- 04:46 PM EDT     Moonrise
Sun -- 06:37 PM EDT     2.94 feet High Tide
Sun -- 07:36 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.71.42.12.62.82.72.31.71.10.60.30.20.41.11.92.52.92.92.621.40.8

Tide / Current Tables for Alexandria, Virginia
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Alexandria
Click for Map
Sun -- 12:45 AM EDT     0.27 feet Low Tide
Sun -- 05:37 AM EDT     Moonset
Sun -- 06:28 AM EDT     3.10 feet High Tide
Sun -- 06:45 AM EDT     Sunrise
Sun -- 01:06 PM EDT     0.20 feet Low Tide
Sun -- 04:46 PM EDT     Moonrise
Sun -- 06:52 PM EDT     3.19 feet High Tide
Sun -- 07:36 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.61.32.12.83.132.621.30.80.40.20.411.82.63.13.22.92.31.71.1

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (14,3,4,5)
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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.