Monday, August19, 2019 L-36.com


Marine Weather and Tides
Dahlgren, VA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:59PM Monday August 19, 2019 10:16 AM EDT (14:16 UTC) Moonrise 9:21PMMoonset 9:03AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 736 Am Edt Mon Aug 19 2019
Today..S winds 5 kt. Waves less than 1 ft. Isolated showers and tstms this afternoon.
Tonight..SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms.
Tue..S winds around 5 kt. Waves 1 ft. A chance of showers and tstms.
Tue night..S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Wed..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Thu..W 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 736 Am Edt Mon Aug 19 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the atlantic will deliver a light southerly flow over the region through Tuesday. A cold front will approach the waters Wednesday into Thursday. Small craft advisories may be needed for portions of the waters Wednesday.


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 191353 aaa
afdlwx
area forecast discussion... Updated
national weather service baltimore md washington dc
953 am edt Mon aug 19 2019

Synopsis
A weak surface boundary will linger over the area through the
middle of the week. Southerly flow will continue to usher in hot
and humid conditions into the region during this time. A cold
front will sweep through the area during the second half of the
week, with canadian high pressure building in for the weekend.

Near term through tonight
Continued hot and humid conditions this afternoon with high
temperatures in the middle 90s and heat indices between 100-104.

As for convection, the nssl-wrf arw has been doing an excellent
job the past few days depicting the mode and where convection
has occurred. For today, it shows convection developing east of
the blue ridge mtns south of i-66 and tracking east toward the
potomac river and southern md. The 12z iad sounding showed
decent 0-6km shear of 32kt with a speed MAX of 35kt at 500 mb
which is double the amount of shear there was yesterday. Cape
should be plentiful with middle 90s and 70f dewpoints. Expect
a few more severe storms today than the past couple of days.

Aviation 14z Monday through Friday
Episodes of subVFR conditions possible each afternoon and
evening through Wednesday in passing showers and thunderstorms,
some of which could be strong to severe. Patchy fog will also
yield reduced vsby's (MVFR ifr) during the early morning hours,
especially near the terminals that receive rainfall the day
prior. Outside of convection, winds will be light and south
southwesterly through Wednesday.

Thursday will feature a higher risk of thunderstorms compared to
Friday thanks to a passing cold front, but the risk will
continue Friday if the front stalls.

Marine
Sub SCA conditions expected through the first half of Wednesday
as light southerly flow prevails. Thereafter, southerly flow
increases as a cold front approaches from the northwest, with
sca gusts possible late Wednesday afternoon and overnight.

Showers and thunderstorms will also be possible each afternoon
and evening, bringing the potential for strong gusty winds and
hail. Highest coverage of storms over the waters will be on
Tuesday and again on Wednesday.

Sca may continue Thursday as front approaches, but may abate
Friday, especially if the front stalls.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Lfr
near term... Lfr
short term... Bkf
long term... Rcm
aviation... Rcm lfr
marine... Rcm lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 1 mi52 min Calm G 2.9 85°F 87°F1014.9 hPa
PPTM2 - 8578240 - Piney Point, MD 30 mi46 min S 1 G 1.9
SLIM2 - 8577330 - Solomons Island, MD 32 mi46 min SSW 1 G 2.9 84°F 84°F1015.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 36 mi46 min S 7 G 8 81°F 1016.5 hPa
BSLM2 - Chesapeake Bay, MD 38 mi106 min S 2.9 80°F 1016 hPa76°F
LWTV2 - 8635750 - Lewisetta, VA 38 mi52 min SSW 5.1 G 6 83°F 84°F1016 hPa
WASD2 - 8594900 - Washington, DC 39 mi46 min NW 7 G 8 83°F 84°F1016.1 hPa

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 mi80 minS 610.00 miPartly Cloudy78°F73°F87%1016 hPa
Fredericksburg, Shannon Airport, VA21 mi41 minN 010.00 miFair84°F75°F75%1015.9 hPa
Stafford, Stafford Regional Airport, VA22 mi21 minWNW 610.00 miFair84°F73°F69%1017.9 hPa

Link to 5 minute data for KNYG

Wind History from NYG (wind in knots)
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Last 24hr--SE3SE3S6SW9S7SW8S7SW6S6--S5CalmNW3E5--SE7--SW4----SW3--Calm
1 day ago--S3SE3S4S5S5S7SW4W6SW54NW4NW4NW5NW4NW3CalmCalmS6--SW4SW4SW3SW6
2 days ago--NE3--E6E3S7SW5SW3NW35SW10CalmNW3NW4--Calm----NW3NW4--NW6NW5W4

Tide / Current Tables for Dahlgren, Upper Machodoc Creek, Virginia
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Dahlgren
Click for Map
Mon -- 12:09 AM EDT     0.37 feet Low Tide
Mon -- 06:10 AM EDT     2.02 feet High Tide
Mon -- 06:26 AM EDT     Sunrise
Mon -- 10:02 AM EDT     Moonset
Mon -- 12:33 PM EDT     0.36 feet Low Tide
Mon -- 06:31 PM EDT     1.96 feet High Tide
Mon -- 07:56 PM EDT     Sunset
Mon -- 10:20 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.71.11.51.9221.71.30.90.60.40.40.60.91.31.71.91.91.71.410.7

Tide / Current Tables for Mathias Point, Virginia
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Mathias Point
Click for Map
Mon -- 01:04 AM EDT     0.25 feet Low Tide
Mon -- 06:25 AM EDT     Sunrise
Mon -- 06:56 AM EDT     1.36 feet High Tide
Mon -- 10:02 AM EDT     Moonset
Mon -- 01:13 PM EDT     0.18 feet Low Tide
Mon -- 07:16 PM EDT     1.38 feet High Tide
Mon -- 07:57 PM EDT     Sunset
Mon -- 10:20 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.30.50.81.11.31.41.310.70.50.30.20.20.40.711.31.41.31.20.90.6

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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 (10,2,3,4)
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Ground Weather Radar Station Sterling, VA
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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.