Monday, September25, 2017 L-36.com


Marine Weather and Tides
Mantua, VA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:59AMSunset 7:01PM Monday September 25, 2017 8:21 PM EDT (00:21 UTC) Moonrise 11:06AMMoonset 9:32PM Illumination 28% Phase: Waxing Crescent; Moon at 5 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- 732 Pm Edt Mon Sep 25 2017
Tonight..E winds 5 kt. Waves less than 1 ft.
Tue..NE winds 5 kt. Waves less than 1 ft.
Tue night..N winds 5 kt. Waves less than 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 kt. Waves less than 1 ft.
Thu..N winds 10 kt with gusts to 20 kt. Waves 1 ft.
Thu night..N winds 5 to 10 kt. Waves 1 ft.
Fri..W winds 5 kt. Waves less than 1 ft.
Sat..N winds 5 to 10 kt. Waves 1 ft.
ANZ500 732 Pm Edt Mon Sep 25 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A ridge of high pressure will remain over the waters through tonight, then it will weaken overhead Tuesday through Wednesday as hurricane maria drifts north to northeast off the north carolina coast. A cold front will pass through the area Thursday and a reinforcing cold front will pass through late Friday into Friday night. High pressure will likely return for the weekend. Small craft advisories may be needed Tuesday night through Wednesday night and gale force winds are possible Thursday. Refer to the national hurricane center for up-to-date information on hurricane maria.

7 Day Forecast for Marine Location Near Mantua, VA
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location: 38.84, -77.25     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 251910
afdlwx
area forecast discussion
national weather service baltimore md washington dc
310 pm edt Mon sep 25 2017

Synopsis High pressure will slowly weaken its grip over the
area Tuesday and Wednesday as hurricane maria moves northward
through the western atlantic. A cold front will move through
Thursday, bringing more seasonable temperatures for the end of
the week. Little if any rain is expected.

Near term until 6 am Tuesday morning Ridge of high pressure
will hold through tonight although it will be weakening. Patchy
late night fog is possible again overnight, otherwise mostly
clear skies are expected.

Short term 6 am Tuesday morning through Wednesday night
Clouds associated with hurricane maria will spread
northwestward early Tue morning and as far west as the blue
ridge mountains. There could be a few showers in southern md,
otherwise thickening clouds.

Long term Thursday through Monday
Conditions will be dry for Thursday into Friday with cold front
to our east and high pressure building from the west over our
area. In the meantime, hurricane maria will be moving away from
the us east coast.

An upper trough could bring some showers over our area late Friday
into Saturday, but dry conditions return for the rest of the long
term period with high pressure building in over our region. High
temperatures will be near normal around 70s or 80s... Colder at
higher elevations.

Aviation 19z Monday through Saturday
Except for some patchy late night fog,VFR conditions are
expected.

Vfr conditions expected Thursday into Saturday. Some
showers possible Friday night.

Marine Winds will strengthen tonight through Wednesday as
pressure gradient tightens in response to approaching hurricane
maria. A cold front will move through the area early Thu with
gales possible. Winds will diminish Thu night.

Small craft advisory expected Thursday into Friday for some
zones of our waters. Lighter wind gusts expected for Saturday.

Tides coastal flooding
Lwx watches warnings advisories
Dc... None.

Md... Coastal flood advisory from 6 pm to 8 pm edt this evening for
mdz017.

Va... None.

Wv... None.

Marine... Small craft advisory from 7 am to 6 pm edt Tuesday for anz533-
534-537-541>543.

Synopsis... Lfr
near term... Lfr
short term... Lfr
long term... Imr
aviation... Imr lfr
marine... Imr lfr dfh
tides coastal flooding... Lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 12 mi52 min SE 2.9 G 5.1 83°F 77°F1015.4 hPa
BSLM2 - Chesapeake Bay, MD 29 mi112 min NE 1 81°F 1015 hPa69°F
NCDV2 38 mi52 min N 1.9 G 4.1 79°F 81°F1014 hPa
APAM2 - 8575512 - Annapolis, MD 42 mi52 min 79°F 1014.9 hPa
44063 - Annapolis 43 mi32 min ESE 3.9 G 7.8 80°F 1014.8 hPa
TPLM2 - Thomas Point, MD 43 mi82 min E 4.1 G 4.1 81°F 77°F
BLTM2 - 8574680 - Baltimore, MD 46 mi52 min S 1.9 G 4.1 82°F 80°F1014.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 46 mi52 min SE 8 G 8 82°F 1015.1 hPa
CPVM2 47 mi52 min 82°F 69°F
44062 - Gooses Reef, MD 48 mi32 min E 9.7 G 12 79°F 1016.2 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi26 minN 010.00 miFair73°F68°F85%1015.5 hPa
Washington/Reagan National Airport, DC, VA12 mi30 minESE 510.00 miMostly Cloudy82°F69°F65%1015.5 hPa
Washington/Dulles International Airport, DC, VA13 mi30 minE 510.00 miMostly Cloudy78°F68°F71%1015.4 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA17 mi26 minN 010.00 miFair75°F69°F82%1016.4 hPa
College Park Airport, MD20 mi37 minN 010.00 miFair74°F68°F82%1015.6 hPa
Camp Springs / Andrews Air Force Base, MD20 mi84 minENE 510.00 miFair80°F66°F65%1016.1 hPa
Quantico Marine Corps Airfield - Turner Field, VA23 mi26 minE 610.00 miFair80°F72°F76%1015.3 hPa
Gaithersburg - Montgomery County Airport, MD23 mi26 minN 010.00 miFair75°F68°F79%1018.7 hPa
Leesburg / Godfrey, VA24 mi27 minSE 510.00 miFair82°F69°F66%1016.3 hPa

Wind History from DAA (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3SE5NE3NE3E3SE7SE5SE4CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalm--CalmCalmCalmNW4N5NE4CalmN4CalmSE5SE7E4SE5CalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4NW5N3N5NW7N3NW6W4NW8NW3CalmCalm

Tide / Current Tables for Chain Bridge, D.C.
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Chain Bridge
Click for Map
Mon -- 12:32 AM EDT     3.37 feet High Tide
Mon -- 06:59 AM EDT     Sunrise
Mon -- 07:30 AM EDT     0.47 feet Low Tide
Mon -- 12:05 PM EDT     Moonrise
Mon -- 01:04 PM EDT     3.00 feet High Tide
Mon -- 07:00 PM EDT     Sunset
Mon -- 07:15 PM EDT     0.44 feet Low Tide
Mon -- 10:31 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.33.32.92.31.71.20.80.50.50.91.72.42.832.82.31.610.60.40.50.91.72.5

Tide / Current Tables for Chain Bridge, Washington, D.C.
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Chain Bridge
Click for Map
Mon -- 12:28 AM EDT     3.35 feet High Tide
Mon -- 06:59 AM EDT     Sunrise
Mon -- 07:28 AM EDT     0.49 feet Low Tide
Mon -- 12:05 PM EDT     Moonrise
Mon -- 01:01 PM EDT     2.98 feet High Tide
Mon -- 07:00 PM EDT     Sunset
Mon -- 07:11 PM EDT     0.45 feet Low Tide
Mon -- 10:31 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.33.32.92.31.71.10.80.50.511.72.42.832.82.21.610.60.50.511.72.5

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Baltimore, MD/Washington (20,4,5,8)
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Ground Weather Radar Station Sterling, VA
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weather_mapweather_map weather_map

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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 numerious 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.