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Marine Weather and Tides Oakton, 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

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Sunrise 6:27AM

Sunset 7:56PM

Thursday August 22, 2019 1:51 PM EDT (17:51 UTC)

Moonrise 10:48PM

Moonset 11:59AM

Illumination 54%

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 Oakton, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 221407 aaa afdlwx area forecast discussion... Updated national weather service baltimore md washington dc 1007 am edt Thu aug 22 2019 Synopsis A cold front will cross the area late tonight or early Friday, then move into the carolinas over the weekend. Canadian high pressure will build north of the region over the weekend and hold through early next week. Near term through tonight Hot and humid conditions expected again today out ahead of an approaching cold front and upper level trough. High temperatures will peak in the low to mid 90s, with heat index values from the mid 90s to low 100s. This warmth humidity will allow for the development of 1000-2000 j kg of SBCAPE by this afternoon. Currently monitoring ongoing convective system across central west virginia. A general weakening trend will continue as it progresses eastward over the next several hours, but a few showers and isolated thunderstorms are possible across portions of eastern WV and western va. The main catalyst for possible convective activity across the region will likely be some upper level energy moving east-northeastward out of kentucky this morning, which will cross the region during the evening hours. Convective allowing models are in general agreement of convective initiation occurring across the higher terrain of eastern WV and central western va during the mid to late afternoon hours, with activity progressing eastward during the evening hours. Given the SBCAPE mentioned above, in addition to large amounts of dcape (>1000 j kg), and 20-30 knots of effective shear, some isolated severe thunderstorms are possible, with localized damaging winds likely the greatest threat. Some additional shower and thunderstorm activity will remain possible overnight as a cold front will be crossing the area late tonight into early Fri morning. Lows from the mid 60s to low 70s. Short term Friday through Saturday night Showers and perhaps a few thunderstorms will remain possible Friday especially in the morning as cdfnt sags southward. Severe wx, if any, would be confined to eastern va and far southern md chesapeake bay waters. Most of the showers should be gone by midnight Fri night if nor earlier. Dry and much cooler weather will establish for the weekend as high pressure builds from the north. Long term Sunday through Wednesday High pressure will build into the region Sunday and linger through Tuesday. Dry conditions and near average temperatures are expected each day for most of our region. An onshore flow from the western atlantic could spawn a few showers or a thunderstorm Monday afternoon and again Tuesday afternoon, mainly in the upslope

areas and along the chesapeake bay. The high pressure will move to the northeast Tuesday night and Wednesday. A cold front will approach the region from the west. The approaching front will allow for a southerly return flow to develop and bring in more humid conditions and warmer temperatures. Showers and thunderstorms will become more widespread, or at least the chances will increase going into Wednesday. One caveat to the extended forecast that could make or break our region with a lot of showers and thunderstorms or dry through a long stretch will be the possible coastal low, sub-tropical low, or perhaps tropical low along the east coast Monday night through Wednesday. Placement and intensity and timing are low confidence factors so far with the possible low pressure system. Both the european and GFS models hint of this low along the east coast and mid-atlantic coast, but neither model has a direct impact on our cwa. We will have to see what, if any, low develops and where it moves over the next two to three days. Aviation 14z Thursday through Monday Scattered afternoon and early evening t-storms expected. Cdfnt crosses the area late tonight or early fri. High pressure builds for the weekend. Vfr conditions for all terminals Sunday through Monday night. We can't rule out a shower or thunderstorm near cho late Sunday into Sunday night, or a shower or thunderstorm at any terminal Monday afternoon. Winds northeast to east 5 to 10 knots Sunday through Monday, becoming southeast 5 to 10 knots Monday night. Marine Gusty t-storms possible late today or this evening may require smws. Showers may linger across the southern waters all day fri. No marine hazards expected Sunday through Monday night. Winds northeast 10 knots Sunday through Monday, becoming east 10 knots Monday night. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... None. Synopsis... Lfr near term... Mm lfr short term... Lfr long term... Klw aviation... Mm lfr klw marine... Mm lfr klw

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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	15 mi	52 min	W 5.1 G 9.9	89°F	84°F		1013.9 hPa (-0.7)
BSLM2 - Chesapeake Bay, MD	32 mi	142 min	W 5.1	86°F			1014 hPa	70°F
NCDV2	41 mi	58 min	WSW 5.1 G 6	88°F	86°F		1013.3 hPa
APAM2 - 8575512 - Annapolis, MD	44 mi	52 min		90°F			1012.9 hPa (-0.8)
TPLM2 - Thomas Point, MD	46 mi	52 min	WSW 11 G 13	86°F	83°F		1014.6 hPa (-0.8)	67°F
BLTM2 - 8574680 - Baltimore, MD	47 mi	58 min	W 2.9 G 9.9	88°F	85°F		1012.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	47 mi	52 min	W 8.9 G 13	86°F			1013.3 hPa
FSNM2	47 mi	58 min	W 8 G 12				1013.4 hPa
CPVM2	49 mi	52 min		89°F				65°F

Wind History for Washington, DC

(wind in knots)    EDIT      (on/off)   Help

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S6 G12

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Washington/Dulles International Airport, DC, VA	10 mi	60 min	NW 7	10.00 mi	Mostly Cloudy	89°F	66°F	47%	1014.2 hPa
Fort Belvoir, VA	12 mi	56 min	W 4	10.00 mi	A Few Clouds	91°F	67°F	46%	1014.1 hPa
Washington/Reagan National Airport, DC, VA	14 mi	60 min	W 3	10.00 mi	Mostly Cloudy	90°F	66°F	45%	1014.1 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA	16 mi	56 min	W 8	10.00 mi	A Few Clouds	92°F	69°F	47%	1014.9 hPa
Leesburg / Godfrey, VA	20 mi	57 min	W 7 G 15	mi	Fair	88°F	69°F	55%	1015.2 hPa
Gaithersburg - Montgomery County Airport, MD	21 mi	56 min	Var 5	10.00 mi	A Few Clouds	86°F	70°F	59%	1016 hPa
College Park Airport, MD	21 mi	69 min	SW 4	10.00 mi	Fair	87°F	62°F	44%	1013.9 hPa
Camp Springs / Andrews Air Force Base, MD	23 mi	56 min	W 3	10.00 mi	A Few Clouds	89°F	68°F	51%	1014.3 hPa

Link to 5 minute data for KIAD

Wind History from IAD (wind in knots)

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Tide / Current Tables for Chain Bridge, D.C.

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Tide / Current Tables for Chain Bridge, one mile below, D.C.

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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 (13,3,4,5)

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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.