Monday, June26, 2017 L-36.com


Marine Weather and Tides
Woodbridge, 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 5:44AMSunset 8:39PM Monday June 26, 2017 4:40 AM EDT (08:40 UTC) Moonrise 7:38AMMoonset 9:54PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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- 131 Am Edt Mon Jun 26 2017
Overnight..NW winds 10 kt. Waves 1 ft.
Mon..W winds 5 to 10 kt. Waves 1 ft.
Mon night..NW winds 5 to 10 kt. Waves 1 ft.
Tue..W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..W winds 5 kt. Waves less than 1 ft.
Wed night..S winds 5 kt. Waves less than 1 ft.
Thu..SW winds 5 to 10 kt. Waves 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 131 Am Edt Mon Jun 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build west of the area through Tuesday. A weak cold front cross the waters Tuesday. High pressure will move over the area Wednesday before shifting offshore Thursday. Small craft advisory conditions are possible over portions of the waters Tuesday and again Thursday.

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 260800
afdlwx
area forecast discussion
national weather service baltimore md washington dc
400 am edt Mon jun 26 2017

Synopsis
High pressure will build west of the area through Tuesday. A
cold front will cross the region Tuesday. High pressure will
move over the region Wednesday and settle offshore late in the
week.

Near term today
As of 3am, an upper trough stretches from the canadian prairies to
the midwest then up over new england per water vapor imagery. A
1024mb surface high is centered over kansas city. This surface high
will drift east to the central mid-atlantic through Tuesday night
before the center moves off the mouth of the chesapeake bay
Wednesday. West flow and cold air advection under the upper trough
will keep temperatures below normal through Wednesday night.

A weak shortwave trough rounds the upper trough and crosses the mid-
atlantic tonight. The airmass should be too dry for any shower
development. However, the low 80s surface water temps of the
chesapeake will continue to be a notable moisture source. A shower
cannot be ruled out near the bay this afternoon.

Short term tonight through Wednesday night
The upper trough axis crosses the area Tuesday night. This should
provide enough forcing for widely scattered showers with isolated
afternoon thunderstorms. Otherwise, expect the coolest day in three
weeks with MAX temps in the upper 70s.

Return southerly flow that begins late Wednesday behind the surface
high.

Long term Thursday through Sunday
After a cool (for late june) period high pressure moves offshore
Thursday and the heat and humidity return through the weekend.

Still, not extreme heat: upper 80s around 90.

It is hard to pin down the exact timing chance of precipitation
several days in advance, but for now it looks like Saturday
night Sunday would have the best chances as a shortwave tracks
north of the forecast area.

4th of july is still beyond the scope of this forecast, but for
now neither the GFS or euro shows anything too dangerous -
euro's upper pattern is high zonal while GFS has a weak upper
trough running down the eastern seaboard.

Aviation 07z Monday through Friday
Vfr prevails through the week as high pressure slowly builds from
the west. Passing shower isolated thunderstorm Tuesday ahead of a
cold front.

Vfr conditions expected Thursday and Friday.

Marine
Nwly flow may gust to around 20 knots this morning, but confidence
is low, so winds were capped at 15 knots. High pressure slowly
builds through Wednesday. Return southerly flow begins Wednesday
night as the high shifts to bermuda.

Winds expected to remain below SCA values Thursday Friday.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Products... Baj woody!


Weather Reporting Stations
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Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW3
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G11
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G10
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NW10
G15
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1 day
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S9
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G20
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2 days
ago
S6
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G11
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G11
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G14
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G16
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SW8
G17
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G14
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G12
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G15
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G14
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G16
SW7
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G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA6 mi1.7 hrsN 010.00 miFair56°F51°F82%1017.9 hPa
Quantico Marine Corps Airfield - Turner Field, VA11 mi44 minWNW 910.00 miFair64°F55°F75%1017.9 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA17 mi44 minN 010.00 miFair56°F54°F93%1019.2 hPa
Washington/Reagan National Airport, DC, VA18 mi48 minW 810.00 miA Few Clouds72°F46°F41%1017.5 hPa
Stafford, Stafford Regional Airport, VA21 mi45 minN 010.00 miFair53°F52°F100%1019.3 hPa
Camp Springs / Andrews Air Force Base, MD22 mi1.7 hrsN 010.00 miFair63°F48°F59%1017.7 hPa

Wind History from DAA (wind in knots)
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Last 24hrCalmCalmCalmCalmNW6NW6W3NW11W7SW6NW7NW9W9W9NW13NW9
G15
NW5CalmCalmCalmCalmSE3CalmCalm
1 day agoW12
G25
NW12NW11W10W12NW11W12
G18
W11W10W11SW7W10W7W7W5CalmCalmCalmCalmCalmSE3CalmCalmCalm
2 days agoSW3SW3SE3S5S7S5S6
G15
S5SW7
G15
S6
G19
S7S4S7S5S8S8S4SE4S5S6S7S6SE5S6

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Mon -- 03:37 AM EDT     0.03 feet Low Tide
Mon -- 05:46 AM EDT     Sunrise
Mon -- 08:38 AM EDT     Moonrise
Mon -- 09:19 AM EDT     2.07 feet High Tide
Mon -- 04:24 PM EDT     -0.09 feet Low Tide
Mon -- 08:37 PM EDT     Sunset
Mon -- 10:00 PM EDT     1.84 feet High Tide
Mon -- 10:53 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.60.30.100.30.91.41.92.121.71.30.90.50.2-0.1-00.30.91.41.71.81.7

Tide / Current Tables for Deep Point, Mattawoman Creek, Potomac River, Maryland
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Deep Point
Click for Map
Mon -- 03:28 AM EDT     0.04 feet Low Tide
Mon -- 05:46 AM EDT     Sunrise
Mon -- 08:38 AM EDT     Moonrise
Mon -- 09:09 AM EDT     2.08 feet High Tide
Mon -- 04:14 PM EDT     -0.07 feet Low Tide
Mon -- 08:37 PM EDT     Sunset
Mon -- 09:49 PM EDT     1.84 feet High Tide
Mon -- 10:53 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.60.30.10.10.411.51.92.121.61.20.80.50.2-0.100.411.51.81.81.6

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 (4,6,7,8)
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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.