Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Alexandria, 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 8:38PM Wednesday June 28, 2017 1:16 AM EDT (05:16 UTC) Moonrise 9:50AMMoonset 11:11PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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- 1031 Pm Edt Tue Jun 27 2017
Rest of tonight..NW winds 10 kt. Waves 1 ft.
Wed..W winds 5 kt. Waves less than 1 ft.
Wed night..S winds 5 to 10 kt. Waves 1 ft.
Thu..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Thu night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Fri..SW winds 10 kt. Waves 1 ft.
Fri night..S winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Sun..NW winds around 5 kt. Waves 1 ft. A chance of tstms in the morning. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Tue Jun 27 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak cold front will cross the chesapeake bay region tonight. High pressure will move over the area Wednesday before shifting to bermuda through Thursday. Small craft advisory conditions are possible over portions of the waters Thursday.

7 Day Forecast for Marine Location Near Alexandria, VA
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location: 38.83, -77.04     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 280117
afdlwx
area forecast discussion
national weather service baltimore md washington dc
917 pm edt Tue jun 27 2017

Synopsis
High pressure will build over the area late tonight and
Wednesday before moving offshore Thursday. Warm conditions
expected towards the end of the week and through the weekend.

Near term through Wednesday
A surface trough remains near the chesapeake bay this evening.

Scattered showers and thunderstorms are possible mainly across
far southern md and surrounding waters for the rest of the
evening. Northerly flow will continue to move into the mid-
atlantic region tonight as high pressure moves eastward. Dry
conditions expected through Wednesday.

A cool night expected across the region tonight with temps
ranging from the 40s in the mtns to the u50s by the chesapeake
bay and tidal potomac river.

High pressure will move overhead Wednesday and calm and clear
conditions are expected. Wednesday will be the last day of the
cooler than normal stretch of temperatures with temps only
reaching the u70s l80s. High pressure will move off the coast
by Wednesday evening and winds will become southerly by late wed
afternoon.

Short term Wednesday night through Thursday night
A significant warming trend is expected Thu and Fri as high
pressure remains offshore.

Long term Friday through Tuesday
As high pressure moves over the western atlantic, warmer temperatures
and increasing chances of showers and thunderstorms will develop
Friday through Sunday. The best chance for showers and storms will
be Saturday and Sunday.

A second area of high pressure will build into the region Monday and
Tuesday, bringing more seasonable temperatures and dry conditions.

Aviation 01z Wednesday through Sunday
Vfr conditions through Sat night. Risk of showers and
thunderstorms on Sunday.

Marine
A pressure surge is expected tonight with SCA conditions
expected through the night.

Strong srly winds expected Wed night and thu. Scas have been
issued for Wed night.

No marine hazards expected Friday through Saturday night. Winds
southwest around 10 knots.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 6 am edt Wednesday for anz530>533-
538>542.

Small craft advisory from 9 pm Wednesday to 6 am edt Thursday
for anz530>534-536>543.

Small craft advisory until 8 am edt Wednesday for anz534-537-
543.

Synopsis... Lfr
near term... Hsk
short term... Lfr
long term... Klw
aviation... Hsk lfr klw
marine... Hsk lfr klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44061 - Upper Potomac, MD 3 mi58 min NNW 5.8 G 7.8 68°F 80°F1019 hPa
WASD2 - 8594900 - Washington, DC 3 mi46 min WNW 4.1 G 6 70°F 81°F1018.6 hPa
BSLM2 - Chesapeake Bay, MD 18 mi106 min Calm 65°F 1018 hPa56°F
APAM2 - 8575512 - Annapolis, MD 32 mi46 min 70°F 1018.4 hPa
TPLM2 - Thomas Point, MD 32 mi76 min NNW 12 G 14 71°F 77°F
44063 - Annapolis 33 mi36 min N 7.8 G 9.7 70°F 1018.9 hPa
NCDV2 35 mi46 min NNW 2.9 G 5.1 67°F 79°F1018.1 hPa
CPVM2 36 mi46 min 70°F 54°F
44062 - Gooses Reef, MD 38 mi36 min N 16 G 19 73°F 1019.2 hPa
FSNM2 38 mi46 min NNW 11 G 15 69°F 1018.6 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 38 mi46 min NW 11 G 13 70°F 1018.5 hPa
BLTM2 - 8574680 - Baltimore, MD 39 mi46 min N 6 G 8.9 69°F 78°F1018.4 hPa
44043 - Patapsco, MD 41 mi36 min NNW 12 G 14 71°F 1019.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 46 mi46 min N 16 G 22 73°F 1019.2 hPa
SLIM2 - 8577330 - Solomons Island, MD 47 mi46 min NNW 7 G 9.9 71°F 79°F

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Washington/Reagan National Airport, DC, VA2 mi24 minNNW 610.00 miA Few Clouds67°F48°F51%1019.3 hPa
Camp Springs / Andrews Air Force Base, MD9 mi18 minN 310.00 miFair62°F47°F59%1019.5 hPa
Fort Belvoir, VA10 mi78 minN 010.00 miPartly Cloudy62°F49°F64%1019.2 hPa
College Park Airport, MD12 mi24 minN 010.00 miFair59°F49°F71%1019.3 hPa
Fort Meade / Tipton, MD23 mi43 minN 010.00 miFair55°F51°F88%1020 hPa
Washington/Dulles International Airport, DC, VA24 mi24 minN 010.00 miFair60°F46°F60%1019.3 hPa
Gaithersburg - Montgomery County Airport, MD24 mi20 minN 010.00 miFair56°F46°F72%1022.3 hPa

Wind History from DCA (wind in knots)
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Last 24hrN7N6N3N4NW8CalmN4NW10N6N8W8
G17
W7
G18
W10W9N11E5W6NW10NW11NW13N13N9NW7NW6
1 day agoNW6NW7W8NW9NW7N7N5NW11
G15
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G21
W11
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NW9--W9
G14
4W12W10
G15
S9S8S11S9S11S11S8NW9
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2 days agoW5NW7N6N5CalmNW5NW7NW9N11NW6W8
G16
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NW10NW9W4NW9W13
G17
NW16NW14NW9NW74NW7W6

Tide / Current Tables for Bellevue, Potomac River, Washington, D.C.
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Bellevue
Click for Map
Wed -- 12:11 AM EDT     3.25 feet High Tide
Wed -- 05:45 AM EDT     Sunrise
Wed -- 06:52 AM EDT     0.17 feet Low Tide
Wed -- 10:50 AM EDT     Moonrise
Wed -- 12:27 PM EDT     3.41 feet High Tide
Wed -- 07:27 PM EDT     0.00 feet Low Tide
Wed -- 08:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.23.12.61.91.30.80.30.20.51.42.333.43.32.92.31.610.50.10.10.71.62.4

Tide / Current Tables for Benning Bridge, D.C.
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Benning Bridge
Click for Map
Wed -- 12:26 AM EDT     3.44 feet High Tide
Wed -- 05:45 AM EDT     Sunrise
Wed -- 07:04 AM EDT     0.15 feet Low Tide
Wed -- 10:50 AM EDT     Moonrise
Wed -- 12:41 PM EDT     3.60 feet High Tide
Wed -- 07:40 PM EDT     -0.03 feet Low Tide
Wed -- 08:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.43.42.92.21.50.90.40.20.41.22.233.53.63.22.51.81.20.60.100.51.42.4

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 (1,6,7,8)
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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.