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Marine Weather and Tides Mount Vernon, VA Version 3.4

What's New / NOTES 10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

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Sunrise 6:51AM

Sunset 5:52PM

Wednesday February 20, 2019 12:08 PM EST (17:08 UTC)

Moonrise 7:18PM

Moonset 7:46AM

Illumination 98%

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.

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7 Day Forecast for Marine Location Near Mount Vernon, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 201520 afdlwx area forecast discussion national weather service baltimore md washington dc 1020 am est Wed feb 20 2019 Synopsis Low pressure will track from the mississippi valley into the great lakes today through tonight. Coastal low pressure will develop along the mid-atlantic coast tonight before moving off to our northeast Thursday. High pressure will return Thursday night and Friday before another low pressure impacts the area early next week. Near term through tonight Snow overspread the CWA this morning and is now transitioning to sleet and freezing rain across southern and western locations, including southern and western portions of maryland, central and northwestern virginia, and eastern west virginia. Snow persists at present from dc northwestward to hagerstown and points north and east, but the transition should continue sliding northeast across the remaining portions of the region through midday. Warming surface temps will then begin to spead across the region from southeast to northwest, allowing the sleet and freezing rain to change to plain rain, but this progress is notoriously hard to forecast and our confidence on this timing remains lower than we'd like. Will maintain headlines for now but may start to chop away at the winter storm warning in areas where it is becoming apparent that criteria is not being met, while as temps warm in southern md, we may start chipping away at the advisory. Precip should end as rain or a very marginal freezing rain late tonight across the region. Of note is that available instability aloft has been impressive enough to generate sporadict lightning strikes, and these may continue into the early afternoon as precip continues to transition from snow to ice. Short term Thursday through Friday night Cdfnt clears the area early on Thu with rain ending by 09z if not sooner. High pressure then builds over the area Thu night with next round of overrunning precip associated with developing southern plains cyclone beginning late Fri night. Given milder period ahead and high pressure at a more eastward position, this appears to be a mostly rain event except possibly in far nw maryland where some freezing rain is possible. Long term Saturday through Tuesday Warm front will be crossing the area Saturday, with more than enough isentropic lift to induce a swath of precipitation. Thermal profiles will be sufficiently warm for this to be all rain. With a trajectory off of the gulf of mexico, anticipate that moisture won't be a hinderance. Model guidance suggesting precipitable water will be exceeding an inch... And approaching an impressive (for february) 1.5 inches by Saturday night. Any remaining snow should be melted away, as temperatures drop little Saturday night in continued warm advection. But, the rainfall and snowmelt could lead to flooding concerns, as suggested by the naefs mmerf. Temperatures will continue to rise well into the 60s on Sunday ahead of a cold front, which may lead to additional showers. A tight thermal gradient should lead to strong cold advection, and thus windy conditions. High pressure will build across the northeast Monday-Tuesday. Since broad ridging remains 850-500 mb, temperatures don't drop considerably... And will remains at or above climo normals

Monday, receding to near normal by Tuesday. (cold advection breezy conditions will continue into Monday.) with a jetmax along the central atlantic coast, systems will be progressive. Chance pops will return by the end of the day Tuesday. Aviation 15z Wednesday through Sunday Continuing lifr ifr conditions this morning as snow changes to sleet and freezing rain in the afternoon and eventually to rain late today or early this evening. Kmrb will be the last to change to rain not likely until 03z tonight. Rain ends late tonight around 09z with CIGS and vsbys improving. Flight restrictions (MVFR to ifr) likely this weekend in rain. Conditions may lift slightly Saturday night between warm and cold frontal passages. Marine Marginal SCA conditions possible this afternoon and evening. Otherwise, light winds 10 kt or less through Fri night. Light (at or below 10 kt) south winds Saturday as a warm front passes north of the waters. Mixing improves considerably Sunday behind a cold front. Small craft advisory conditions likely on Sunday. Lwx watches warnings advisories Dc... Winter storm warning until 7 pm est this evening for dcz001. Md... Winter storm warning until 7 pm est this evening for mdz005- 006-011-013-014-503>508. Winter storm warning until 1 am est Thursday for mdz003-004- 501-502. Winter weather advisory until 4 pm est this afternoon for mdz016>018. Va... Winter storm warning until 10 pm est this evening for vaz025- 026-036>038-503-504-507-508. Winter storm warning until 7 pm est this evening for vaz039- 050>054-502-506. Winter storm warning until 1 am est Thursday for vaz027>031- 040-501-505. Winter weather advisory until 4 pm est this afternoon for vaz055>057. Wv... Winter storm warning until 10 pm est this evening for wvz505- 506. Winter storm warning until 1 am est Thursday for wvz050>053- 055-501>504. Marine... Small craft advisory until 6 pm est this evening for anz531>533-539>542. Small craft advisory until 10 pm est this evening for anz534- 537-543. Synopsis... Lfr near term... Lfr rcm short term... Lfr long term... Hts aviation... Lfr hts rcm marine... Lfr hts rcm

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WASD2 - 8594900 - Washington, DC	14 mi	39 min	ENE 2.9 G 5.1	30°F	41°F		1033.8 hPa
BSLM2 - Chesapeake Bay, MD	22 mi	99 min	SE 6	30°F			1033 hPa	29°F
NCDV2	25 mi	45 min	ENE 1.9 G 2.9	31°F	39°F		1032.3 hPa
TPLM2 - Thomas Point, MD	38 mi	69 min	ENE 8 G 9.9	29°F	37°F		1033.9 hPa (-1.1)	29°F
APAM2 - 8575512 - Annapolis, MD	39 mi	39 min		30°F			1033.8 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD	42 mi	39 min	SE 4.1 G 16	31°F
SLIM2 - 8577330 - Solomons Island, MD	42 mi	39 min	E 8.9 G 11	32°F	39°F		1031.9 hPa
CPVM2	44 mi	39 min		30°F				30°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	48 mi	39 min	ESE 7 G 8.9	29°F			1034.4 hPa
FSNM2	48 mi	45 min	ENE 9.9 G 12	28°F			1033.3 hPa
PPTM2 - 8578240 - Piney Point, MD	48 mi	45 min	E 13 G 16
BLTM2 - 8574680 - Baltimore, MD	49 mi	39 min	ESE 8 G 8.9	29°F	38°F		1033.7 hPa

Wind History for Washington, DC

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NW4 G9

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Fort Belvoir, VA	5 mi	73 min	N 0	1.50 mi	Fog/Mist	30°F	27°F	89%	1032.9 hPa
Washington/Reagan National Airport, DC, VA	13 mi	77 min	E 9	1.00 mi	Light Snow Fog/Mist	31°F	27°F	85%	1032.5 hPa
Camp Springs / Andrews Air Force Base, MD	16 mi	73 min	ENE 7	1.00 mi	Light Snow Fog/Mist	29°F	27°F	92%	1032.9 hPa
Quantico Marine Corps Airfield - Turner Field, VA	16 mi	73 min	E 5	2.00 mi	Light Freezing Rain Fog/Mist	32°F	30°F	96%	1033.2 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA	22 mi	73 min	NNW 6	1.00 mi	Snow	31°F	28°F	89%	1035.7 hPa
College Park Airport, MD	23 mi	86 min	N 0	1.00 mi	Overcast	29°F	26°F	91%	1033.2 hPa

Wind History from DAA (wind in knots)

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NW12 G16

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Tide / Current Tables for Marshall Hall, Maryland

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Tide / Current Tables for High Point, Occoquan Bay, Virginia

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Weather Map and Satellite Images

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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

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Wind Forecast for Baltimore, MD/Washington (12,3,4,5)

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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.