Monday, June26, 2017 L-36.com


Marine Weather and Tides
Dahlgren, 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 5:45AMSunset 8:39PM Monday June 26, 2017 11:38 PM EDT (03:38 UTC) Moonrise 7:38AMMoonset 9:53PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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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ANZ536 Tidal Potomac From Indian Head To Cobb Island- 1045 Pm Edt Mon Jun 26 2017
Rest of tonight..W winds 5 kt. Waves less than 1 ft.
Tue..W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Tue night..NW winds around 5 kt. Waves 1 ft.
Wed..W winds around 5 kt. Waves 1 ft.
Wed night..S winds 5 kt. Waves less than 1 ft.
Thu..SW winds 10 to 15 kt. Waves 1 ft.
Thu night..SW winds 10 to 15 kt. Waves 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1045 Pm 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 will 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 Dahlgren, VA
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location: 38.31, -77.06     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 270114
afdlwx
area forecast discussion
national weather service baltimore md washington dc
914 pm edt Mon jun 26 2017

Synopsis
A sharp upper level trough will move across the region on Tuesday.

High pressure builds over the area Wednesday and moves offshore
Thursday. Warmer conditions expected towards the end of the work
week and into the weekend.

Near term through Tuesday
A surface trough persists across the mid-atlantic region. A few
clouds are across the baltimore washington metros this evening.

Showers have developed in southern pa, right over the md pa
border. A few showers may pop-up across NE md this evening and
exit by midnight. Showers across the ohio valley will approach
the appalachains mtns by Tuesday morning. Showers should taper
off as they move across the mtns as most of the forcing from the
approaching upper level trough lifts northward.

Cool with lows in the 50s except mid 60s in city centers.

A sharp upper level trough will move across the area late
tomorrow. Strong height falls will provide large scale forcing
for showers and thunderstorms to develop. Biggest limiting
factor is lack of low-level moisture and weak instability with
cape values progged at less than 250 j kg. Best coverage of
showers will be east of the blue ridge mtns where instability
will be higher. Showers will only produce very light rainfall
due to relatively high base clouds and a ton of mid-level dry
air. Gusty winds and small hail may be possible due to
inverted-v soundings and very cool temps aloft for this time of
the year. -20c 500 mb temps are progged which is near record low
for late jun.

Short term Tuesday night through Wednesday night
Trough axis moves east Tue evening with rapid clearing. High
pressure builds for Wed with tranquil weather.

Long term Thursday through Monday
High pressure will be in control Thursday through Thursday night,
bringing dry conditions and above normal temperatures. There
could be a stray shower along the mason-dixon region Thursday
night.

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,
bringing more seasonable temperatures and dry conditions.

Aviation 01z Tuesday through Saturday
Vfr conditions next 72 hrs. Widely scattered or scattered
showers and t-storms are expected tomorrow. No restrictions are
anticipated. High pressure builds for wed.

Vfr conditions Thursday and Thursday night. Winds southwest 10 knots
Thursday and Thursday night. MVFR to ifr conditions are possible
with showers and storms Friday and Friday night. Winds southwest 5
to 10 knots Friday and Friday night.

Marine
Srly winds expected to strengthen tonight with SCA conditions.

Winds will diminish toward morning. Very marginal SCA conditions
possible tomorrow, but not enough confidence to issue sca,
however, gusty winds in showers or t-storms may require mwss or
even smws due to very dry environment and potential for deep
mixing.

Small craft advisories may be needed Thursday and Thursday night.

Winds southwest 10 to 15 knots gusts 20 knots. No marine hazards
expected Friday and Friday night. Winds southwest around 10
knots.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 2 am edt Tuesday for anz531>533-
538>541.

Small craft advisory until 4 am edt Tuesday for anz534-537-543.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 1 mi50 min SSW 2.9 G 4.1 73°F 82°F1014.7 hPa
PPTM2 - 8578240 - Piney Point, MD 30 mi50 min SSW 13 G 15
SLIM2 - 8577330 - Solomons Island, MD 32 mi50 min S 8.9 G 11 75°F 79°F
44061 - Upper Potomac, MD 33 mi50 min SSE 7.8 G 7.8 73°F 81°F1015.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 36 mi50 min SSW 14 G 16 76°F 1016.5 hPa
44062 - Gooses Reef, MD 38 mi38 min SW 14 G 18 78°F 78°F2 ft1016.3 hPa (+0.0)
LWTV2 - 8635750 - Lewisetta, VA 38 mi50 min SSW 8 G 8.9 73°F 80°F1016 hPa
BSLM2 - Chesapeake Bay, MD 38 mi128 min ESE 1 69°F 1015 hPa64°F
WASD2 - 8594900 - Washington, DC 39 mi50 min SSE 4.1 G 7 76°F 82°F1015 hPa
44042 - Potomac, MD 43 mi38 min SSW 12 G 14 76°F 79°F1 ft1015.3 hPa (+0.5)

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Quantico Marine Corps Airfield - Turner Field, VA19 mi42 minW 310.00 miFair72°F61°F68%1015.9 hPa
Fredericksburg, Shannon Airport, VA21 mi63 minN 010.00 miFair67°F57°F70%1015.6 hPa
Stafford, Stafford Regional Airport, VA22 mi43 minN 010.00 miFair59°F58°F97%1017.3 hPa

Wind History from NYG (wind in knots)
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Last 24hrNW6NW7NW8NW6NW9NW8NW6NW5NW3CalmNW8NW6NW105SE8S6SE4S7S8S11SW6SW5S5W3
1 day agoNW6NW6NW4NW6NW7W4NW5NW6NW7NW5N54N8NW75NW8NW11NW11NW6N6N8N7W5NW6
2 days agoSW11
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W10NW11NW6W6W8NW8
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N11N9NW6N9N7NW9N4N5NW6NW6NW6

Tide / Current Tables for Dahlgren, Upper Machodoc Creek, Virginia
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Dahlgren
Click for Map
Mon -- 05:25 AM EDT     2.37 feet High Tide
Mon -- 05:46 AM EDT     Sunrise
Mon -- 08:38 AM EDT     Moonrise
Mon -- 11:57 AM EDT     0.04 feet Low Tide
Mon -- 05:50 PM EDT     1.96 feet High Tide
Mon -- 08:35 PM EDT     Sunset
Mon -- 10:52 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.411.62.12.32.321.610.50.200.20.61.11.51.921.81.410.50.2

Tide / Current Tables for Upper Cedar Point Light, Potomac River, Maryland
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Upper Cedar Point Light
Click for Map
Mon -- 12:18 AM EDT     0.03 feet Low Tide
Mon -- 05:46 AM EDT     Sunrise
Mon -- 06:13 AM EDT     1.54 feet High Tide
Mon -- 08:38 AM EDT     Moonrise
Mon -- 01:05 PM EDT     -0.05 feet Low Tide
Mon -- 06:53 PM EDT     1.36 feet High Tide
Mon -- 08:36 PM EDT     Sunset
Mon -- 10:52 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.10.30.71.21.41.51.51.20.90.60.30.1-0.100.40.81.11.31.41.210.70.4

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 (23,6,7,8)
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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.