Tuesday, March31, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Dahlgren, VA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:52AMSunset 7:33PM Tuesday March 31, 2020 3:15 PM EDT (19:15 UTC) Moonrise 10:19AMMoonset 12:35AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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
    EDIT      (on/off)   Help
ANZ536 Tidal Potomac From Indian Head To Cobb Island- 142 Pm Edt Tue Mar 31 2020
This afternoon..E winds 5 to 10 kt. Waves 1 ft. Rain.
Tonight..NE winds 10 to 15 kt. Gusts up to 20 kt. Waves 2 ft. Rain. Patchy fog.
Wed..N winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Thu night..NW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Fri..NE winds 5 to 10 kt. Waves 1 ft.
Sat..S winds around 5 kt. Waves 1 ft.
ANZ500 142 Pm Edt Tue Mar 31 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure pushing swiftly across the deep south today will move offshore of south carolina this evening, then pass well south of the region on its way out to sea tonight into Wednesday. High pressure will slowly build in from the midwest through the end of the week. Small craft advisories may be needed Thursday into Friday.


7 Day Forecast for Marine Location Near Dahlgren CDP, VA
   Hourly   EDIT   Help
location: 38.31, -77.06     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 311405 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1005 AM EDT Tue Mar 31 2020

SYNOPSIS. Low pressure pushing swiftly across the Deep South today will move offshore of South Carolina this evening, then pass well south of the region on its way out to sea tonight into Wednesday. High pressure will slowly build in from the Midwest through the end of the week. The high will gradually move offshore over the weekend. A cold front may approach from the Ohio Valley by early next week.

NEAR TERM /THROUGH WEDNESDAY/. High pressure is located well to the north in Canada this morning, with a lobe extending toward the Mid Atlantic. A backdoor boundary is near northeast Maryland, while an inverted trough extends northward along the Appalachians from low pressure over Alabama. The low will progress across the deep south today ahead of an upper level trough.

Some light radar echoes are nearing the Baltimore metro as the backdoor boundary seeps to the southwest. Meanwhile rain to the southwest ahead of the low will slowly advance to the northeast, though it will take some time for the atmosphere to saturate. Measurable rain will hold off until at least mid-afternoon for most. A narrow corridor near the Potomac river may end up between both moisture sources until this evening, if not through the bulk of the event. Will evaluate PoPs as new guidance arrives. Low clouds have filled in across the north and high clouds are fairly dense across the south, so there probably won't be much sun to be seen today. Considered lowering high temperatures, but given the earlier overcast and higher starting point to temperatures, we aren't too far off from expected highs in the 50s, so minimal adjustments will likely be needed.

Tonight, the backdoor front will cross the region as it gets entrained in the circulation of the stronger low passing to the south. Meanwhile, some modest warm advection and jet dynamics associated with the low to the south will also move into the region. Thus, rain and drizzle is likely in most of the region, though the heaviest precip is likely in central and western VA. Amounts will be light overall, however, with totals unlikely to exceed a half inch anywhere in the region. There is just enough cold air available for a light dusting at the higher elevations, but generally an inch or less, so no winter weather advisories are necessary. Lows tonight will be in the 30s to near 40s.

Dry northeasterly flow from high pressure to the north will start to allow precip to end from northeast to southwest late tonight into Wednesday morning as the low heads out to sea, so much of the region will be dry for the bulk of the day. Lingering upper level energy combined with another weak front dropping southward from the north may bring a few more showers late in the day Wednesday into Wednesday night, especially near and west of I-81. Highs Wednesday will be similar to Tuesday, with 50s common.

SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/. Low pressure heads away allowing high pressure to build in Wednesday night through Thursday night. Clearing skies should allow temps to drop into the 30s Wednesday night, but sunshine Thursday should let temps rebound to near 60. Dry and mostly clear Thursday night with temps again mostly in the 30s to low 40s.

LONG TERM /FRIDAY THROUGH MONDAY/. Generally split zonal flow aloft is expected during the long term period. A surface ridge axis will move slowly from the Midwest across the Mid-Atlantic Friday and Saturday, then move offshore Sunday. A cold front will likely follow Sunday night into Monday, but guidance continues to trend slower and weaker with this feature.

The next appreciable chance of rain may not come until a bit more amplified upper-level trough and associated surface frontal system approach during the early to middle portion of next week.

AVIATION /14Z TUESDAY THROUGH SATURDAY/. VFR to start, but conditions deteriorate late today into tonight as low pressure approaches from the south and a backdoor cold front drops in from the northeast. Possible MVFR cigs could arrive at BWI/MTN faster than progged with the backdoor front, though less certain if they would make it to IAD/DCA. IFR likely tonight at most terminals with low clouds and light rain/drizzle, though some chance MTN/BWI stay MVFR. As the low heads out to sea Wednesday and drier air behind the backdoor front becomes dominant, conditions should improve, and remain VFR Wednesday night through Thursday night.

VFR conditions are expected Friday into Saturday with light northwesterly flow as high pressure builds overhead.

MARINE. SCA conditions likely to develop at least on part of the waters tonight into Wednesday as a low pressure passes to the south. After a lull late Wednesday, another front combined with high pressure building in likely leads to another period of SCA conditions late Wednesday night and Thursday. Winds should diminish as high pressure builds Thursday night.

Dry weather with light northwesterly flow is expected Friday into Saturday under building high pressure.

TIDES/COASTAL FLOODING. The tide forecast is riddled with uncertainty tonight into Wednesday due to distant but deep low pressure expected to pass south and east of the region. Generally onshore flow would result in increasing water levels. But the exact direction and strength of the winds, as well as the timing of a wind shift to a more northerly to northwesterly offshore direction will determine exactly how high water levels are able to get over the next several tide cycles.

Right now, it appears at least minor inundation is most likely for the Wednesday morning/midday high tide cycle.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 4 AM to 1 PM EDT Wednesday for ANZ533-541-542. Small Craft Advisory from 7 PM this evening to 4 PM EDT Wednesday for ANZ534-537-543.

SYNOPSIS . RCM/DHOF NEAR TERM . ADS/RCM SHORT TERM . RCM LONG TERM . DHOF AVIATION . RCM/DHOF MARINE . RCM/DHOF TIDES/COASTAL FLOODING . DHOF


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 1 mi46 min SE 5.1 G 6 53°F 58°F1012 hPa
PPTM2 - 8578240 - Piney Point, MD 30 mi46 min S 8.9 G 11
SLIM2 - 8577330 - Solomons Island, MD 32 mi46 min ESE 5.1 G 6 52°F 54°F1012.9 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 36 mi142 min N 7 G 8 1014.6 hPa
44062 - Gooses Reef, MD 38 mi28 min ESE 14 G 16 50°F
BSLM2 - Chesapeake Bay, MD 38 mi106 min E 5.1 1013 hPa
LWTV2 - 8635750 - Lewisetta, VA 38 mi46 min E 4.1 G 5.1 51°F 56°F1013 hPa
WASD2 - 8594900 - Washington, DC 39 mi46 min E 1.9 G 8 55°F 56°F1012.8 hPa
44042 - Potomac, MD 43 mi22 min E 18 G 21 48°F 1012.8 hPa

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last
24hr
W9
G15
W9
G12
W5
G10
N14
G18
NE13
G18
NE11
G15
NE10
NE8
G12
NE9
G13
NE7
NE5
NE5
NE5
E4
NE3
NE2
S1
NE6
NE8
G12
E3
G8
E9
E4
S10
SE11
1 day
ago
SE8
SE7
SE13
E13
SE12
E8
--
NE6
NE6
NE3
N5
NE4
G7
NE4
NE6
G9
NE5
SE4
E2
SE4
S4
SW5
S3
G6
SE2
W6
G10
SW6
G11
2 days
ago
SE4
G7
SE5
SE2
E4
G7
NE2
E4
NE9
G12
NE6
G9
NE4
NE3
N3
N4
NE5
NE4
G7
E4
NW3
N2
--
NW1
NW4
N3
SE12
SE9
SE11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Quantico Marine Corps Airfield - Turner Field, VA19 mi80 minno data mi55°F37°F51%1013.6 hPa
Fredericksburg, Shannon Airport, VA21 mi21 minENE 410.00 miOvercast55°F39°F57%1012.2 hPa
Stafford, Stafford Regional Airport, VA22 mi21 minESE 410.00 miOvercast55°F38°F54%1013.5 hPa

Link to 5 minute data for KNYG

Wind History from NYG (wind in knots)
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
Last 24hr--SE7N18
G24
N21
G27
--NE11--N12N11N8N7N7N3NW5W4NW5W5----NE7----NE8--
1 day ago------NE6NE53N3NE13N8CalmCalm----NE7NE8E5CalmSE5S5S11S10S12SE14SW11
G20
2 days ago------N4CalmE4NE10NE13NE11N7--CalmN6N5----NE5E3CalmCalmS5--S11--

Tide / Current Tables for Dahlgren, Upper Machodoc Creek, Virginia
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Dahlgren
Click for Map
Tue -- 01:34 AM EDT     Moonset
Tue -- 02:13 AM EDT     0.16 feet Low Tide
Tue -- 06:53 AM EDT     Sunrise
Tue -- 08:34 AM EDT     1.70 feet High Tide
Tue -- 11:19 AM EDT     Moonrise
Tue -- 03:11 PM EDT     0.19 feet Low Tide
Tue -- 07:31 PM EDT     Sunset
Tue -- 09:00 PM EDT     1.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.50.30.20.20.40.71.11.51.71.71.51.20.90.50.30.20.20.40.711.31.41.31.1

Tide / Current Tables for Upper Cedar Point Light, Potomac River, Maryland
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of Mid-Atlantic    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (15,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Sterling, VA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerous 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.