Monday, July24, 2017 L-36.com


Marine Weather and Tides
Fort Washington, MD

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 6:02AMSunset 8:27PM Monday July 24, 2017 4:53 PM EDT (20:53 UTC) Moonrise 6:23AMMoonset 8:27PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 432 Pm Edt Mon Jul 24 2017
Rest of this afternoon..W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms.
Tonight..NW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms.
Tue..NW winds 5 to 10 kt. Waves 1 ft.
Tue night..NE winds 5 to 10 kt. Waves 1 ft.
Wed..E winds 5 kt. Waves less than 1 ft.
Wed night..SE winds 5 kt. Waves less than 1 ft.
Thu..S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Fri..N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 432 Pm Edt Mon Jul 24 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will move across the waters tonight. This will be followed by high pressure Tuesday and Wednesday. The next frontal system will approach on Thursday and pass through the region Friday. Small craft advisories may be needed Thursday and Friday.

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 241844
afdlwx
area forecast discussion
national weather service baltimore md washington dc
244 pm edt Mon jul 24 2017

Synopsis
A cold front will pass through the area this evening. High
pressure will build into the mid atlantic Tuesday before moving
offshore Wednesday. Another cold front will approach the area
Thursday before passing through Friday into Friday night. High
pressure is expected to return for the weekend.

Near term tonight
A thin line of storms has developed over pa into northern wv.

This could have some impact in our forecast area, but the bulk
of the energy should stay to our north. Have scattered isolated
pops in the forecast progressing from west to east during the
late afternoon evening. If there is a threat with these in our
area it will be gusty winds.

Afterwards some pretty nice weather for late july - the
climatologically hottest part of the year. Dewpoints will drop
into the lower to mid 60s by sunrise. Skies will be mostly clear
by morning. Lows west of i-95 will be in the mid to upper 60s,
lower 70s east.

Short term Tuesday through Wednesday night
This will lead into a Tuesday with plenty of sunshine, dewpoints
in the lower 60s, and air temperatures reaching the lower to mid
80s.

Pleasant weather continues Tuesday night with lows in the mid
60s. Wednesday will see moisture begin to creep back into the
mid atlantic as high pressure moves offshore. Highs will reach
the lower to mid 80s. And with the return moisture lows will not
be as cool, falling to the upper 60s lower 70s.

Long term Thursday through Sunday
Warm front lifts back north through the area early Thursday, which
will bring a return to the heat and humidity... As highs climb back
near 90f and dewpoints rise back into the 70s. Increasing chances
for showers and thunderstorms late Thursday into Friday as cold
front and its associated upper-level trough approach and then cross
the area.

High pressure builds into the area behind the front for the weekend
into early next week. Though, low pressure developing along the
front to our south could bring some precipitation back into se
portions of the area Sunday. However, that is not the favored
solution at this point. Otherwise, remaining dry with highs in the
m80s and dewpoints in the 60s.

Aviation 18z Monday through Saturday
Vfr conditions tonight through Wednesday. Only threat is
scattered thunderstorms this evening at all TAF sites except
cho.

Showers and thunderstorms with brief flight restrictions are
possible ahead of a cold front mainly late Thursday into Friday.

Improving conditions into the weekend as high pressure builds into
the area.

Marine
Winds expected to remain below SCA levels through Wednesday.

This evening isolated thunderstorms may impact the maryland
section of the bay and the tidal potomac.

A cold front will approach the waters Thursday into Thursday night
before passing through Friday. Showers and thunderstorms are
possible ahead of the front... Especially late Thursday into Friday.

A small craft advisory may be needed for portions of the waters
Thursday and Friday. Improving conditions into the weekend as high
pressure builds into the area.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Products... Woody! Mse


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 11 mi54 min Calm G 2.9 92°F 86°F1008.8 hPa (-0.6)
BSLM2 - Chesapeake Bay, MD 18 mi144 min WNW 4.1 85°F 1010 hPa67°F
NCDV2 28 mi54 min SW 4.1 G 6 87°F 87°F1009.2 hPa (-0.3)
TPLM2 - Thomas Point, MD 34 mi54 min W 7 G 8.9 86°F 83°F
APAM2 - 8575512 - Annapolis, MD 34 mi54 min 89°F 1008.8 hPa (-0.4)
44063 - Annapolis 35 mi44 min W 7.8 G 9.7 87°F 1009.2 hPa
44062 - Gooses Reef, MD 35 mi44 min WSW 7.8 G 9.7 85°F 1010.7 hPa
CPVM2 39 mi54 min 85°F 73°F
SLIM2 - 8577330 - Solomons Island, MD 41 mi54 min WSW 8 G 11 86°F 84°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 41 mi54 min W 7 G 11 85°F 1010.8 hPa (+0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 44 mi54 min W 8.9 G 12 87°F 1009.1 hPa (-0.3)
BLTM2 - 8574680 - Baltimore, MD 45 mi54 min WNW 5.1 G 7 89°F 86°F1008.7 hPa (-0.3)
44043 - Patapsco, MD 45 mi44 min SSE 7.8 G 9.7 85°F 1010.6 hPa
PPTM2 - 8578240 - Piney Point, MD 48 mi54 min NNW 1.9 G 1.9

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi1.9 hrsS 610.00 miA Few Clouds91°F67°F46%1010 hPa
Washington/Reagan National Airport, DC, VA10 mi62 minN 010.00 miMostly Cloudy90°F66°F47%1009.5 hPa
Camp Springs / Andrews Air Force Base, MD11 mi1.9 hrsN 010.00 miPartly Cloudy88°F66°F49%1010.2 hPa
College Park Airport, MD19 mi66 minNW 710.00 miPartly Cloudy90°F65°F46%1009.5 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi58 minSSW 1110.00 miMostly Cloudy88°F72°F59%1010.1 hPa

Wind History from DAA (wind in knots)
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Last 24hrS5SE3CalmCalm----CalmNW3CalmS6
G17
CalmCalmW6CalmCalmSW3W3N8NW8NW9NW6NW8S6S5
1 day agoN3NW20
G37
SE5--------S4NW4CalmCalmCalmCalmCalmCalmNW3CalmW4CalmNW3SW3CalmS4S3
2 days agoSW5SE4CalmCalmCalmCalmCalmNW5NW4NW6NW5NW5NW5NW6NW7NW4NW5NW4CalmSW3S4S5NW20
G28
Calm

Tide / Current Tables for Riverview, Potomac River, Maryland
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Riverview
Click for Map
Mon -- 03:23 AM EDT     0.02 feet Low Tide
Mon -- 06:02 AM EDT     Sunrise
Mon -- 07:23 AM EDT     Moonrise
Mon -- 09:06 AM EDT     3.31 feet High Tide
Mon -- 04:08 PM EDT     -0.12 feet Low Tide
Mon -- 08:25 PM EDT     Sunset
Mon -- 09:27 PM EDT     Moonset
Mon -- 09:42 PM EDT     2.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40.80.40.10.10.71.62.53.13.33.12.61.91.30.70.2-0.10.10.81.72.42.932.6

Tide / Current Tables for Alexandria, Virginia
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Alexandria
Click for Map
Mon -- 03:40 AM EDT     0.01 feet Low Tide
Mon -- 06:02 AM EDT     Sunrise
Mon -- 07:22 AM EDT     Moonrise
Mon -- 09:23 AM EDT     3.63 feet High Tide
Mon -- 04:23 PM EDT     -0.16 feet Low Tide
Mon -- 08:26 PM EDT     Sunset
Mon -- 09:27 PM EDT     Moonset
Mon -- 09:59 PM EDT     3.28 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.10.50.100.51.42.53.23.63.532.31.60.90.3-0.1-0.10.61.62.53.13.33

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 (16,3,4,5)
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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.