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Marine Weather and Tides Arlington, 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 6:22AM

Sunset 8:02PM

Saturday August 17, 2019 8:33 PM EDT (00:33 UTC)

Moonrise 8:28PM

Moonset 7:09AM

Illumination 94%

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 Arlington, VA

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Area Discussion for - Baltimore, MD/Washington

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Fxus61 klwx 171846 afdlwx area forecast discussion national weather service baltimore md washington dc 246 pm edt Sat aug 17 2019 Synopsis An upper-level ridge will build overhead through Monday with surface high pressure in the atlantic. Hot and humid conditions will persist during this time. The upper- level ridge will gradually weaken Tuesday and Wednesday before a cold front passes through Thursday. High pressure will return for late next week bringing noticeably cooler and less humid conditions. Near term through tonight Isolated to scattered thunderstorms will dissipate early this evening with clear skies. Low clouds and or fog may form again late tonight in northeast md and the va piedmont, but model guidance indicate that it should be less widespread than past two mornings. Otherwise, warm and muggy with lows in the 70s. Short term Sunday through Monday night A bit more convective coverage is shown by hi-res models for Sunday afternoon, otherwise hotter and more humid with temperatures reaching into the middle 90s with heat indices exceeding 100f in many places and may reach 105f briefly in a few spots but should be for an hour or less, so not anticipating issuing any heat advisories at this time. Mid-upper level ridge peaks over the area Monday with similar temperatures to Sunday perhaps a few degrees hotter over western md and western va. Models showing a marked decrease in convective coverage due to high heights aloft and strengthening subsidence inversion. Long term Tuesday through Saturday An upper level trough of low pressure will push across the great lakes later on Tuesday into Wednesday. The heat and humidity will remain in place ahead of the trough. These conditions will fuel the chance for showers and thunderstorms. Some thunderstorms will be on the strong side because of the increased instability. Additional showers and thunderstorms could develop Wednesday night into Thursday as the upper trough pushes across the mid- atlantic region and toward the east coast. A surface cold front will be nudged by the upper trough Thursday and Thursday night. Slightly cooler conditions expected each day from Wednesday through Friday, either due to cloud cover and convection or a

change in the air mass due to cold frontal passage. By the end of the week, high temperatures may only reach the lower to middle 80s. High pressure will build in late week and this weekend. Less humid conditions expected with the building high. Aviation 18z Saturday through Thursday Patchy light fog in the morning (3-5sm vsbys) with only a slight risk of a t-storm in the afternoon. Otherwise, hot and humid next few days. Risk of thunderstorms increases Tue and wed. Brief MVFR conditions possible at the terminals Tuesday afternoon and then again during the day Wednesday with a development of showers and thunderstorms. Some thunderstorms may be strong enough to reduce visibility to ifr at some terminals. Winds southwest around 5 knots Tuesday through Wednesday night. Gusts higher in heavy thunderstorms. Marine Light winds generally 10 kt or less. Slight risk of a thunderstorm each afternoon and night. Locally higher winds and waves in thunderstorms. No marine hazards expected Tuesday through Wednesday night. If any strong thunderstorm affects the potomac and or chesapeake bay through the period, a special marine warning may be warranted. Winds generally southwest 5 to 10 knots. Lwx watches warnings advisories Dc... None. Md... None. Va... None. Wv... None. Marine... None. Synopsis... Lfr near term... Lfr short term... Lfr long term... Klw aviation... Lfr klw marine... 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	2 mi	64 min	S 5.1 G 6
BSLM2 - Chesapeake Bay, MD	20 mi	124 min	S 1.9	87°F			1014 hPa	72°F
APAM2 - 8575512 - Annapolis, MD	32 mi	64 min		85°F			1013.8 hPa
TPLM2 - Thomas Point, MD	33 mi	34 min	S 8.9 G 8.9	83°F	82°F		1015.6 hPa (+0.6)	78°F
BLTM2 - 8574680 - Baltimore, MD	37 mi	64 min	WSW 1.9 G 4.1	86°F	83°F		1013.9 hPa
CPVM2	37 mi	64 min		83°F				82°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD	37 mi	64 min	W 1 G 1.9	85°F			1014.3 hPa
FSNM2	37 mi	64 min	WSW 4.1 G 4.1	84°F			1014.5 hPa
NCDV2	38 mi	64 min	SE 1.9 G 1.9	85°F	89°F		1013.6 hPa
44062 - Gooses Reef, MD	40 mi	34 min	S 9.7 G 12	84°F		2 ft	1015.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD	48 mi	64 min	SSW 14 G 18	83°F			1015.1 hPa
TCBM2 - 8573364 - Tolchester Beach, MD	49 mi	64 min	SSW 1.9 G 4.1	83°F	84°F		1014.6 hPa

Wind History for Washington, DC

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

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Washington/Reagan National Airport, DC, VA	2 mi	3.7 hrs	SE 11	10.00 mi	Mostly Cloudy	89°F	71°F	55%	1013.9 hPa
Camp Springs / Andrews Air Force Base, MD	10 mi	98 min	SSE 6	10.00 mi	Fair	85°F	71°F	63%	1014.6 hPa
College Park Airport, MD	11 mi	91 min	N 0	10.00 mi	Fair	82°F	70°F	68%	1014.2 hPa
Fort Belvoir, VA	12 mi	98 min	SSW 4	10.00 mi	Fair	85°F	71°F	63%	1014.4 hPa
Gaithersburg - Montgomery County Airport, MD	21 mi	98 min	SE 5	10.00 mi	A Few Clouds	84°F	72°F	67%	1016.1 hPa
Fort Meade / Tipton, MD	22 mi	73 min	N 0	10.00 mi	Fair	77°F	69°F	79%	1015.2 hPa
Washington/Dulles International Airport, DC, VA	22 mi	3.7 hrs	SSW 6	10.00 mi	Partly Cloudy	92°F	64°F	40%	1013.5 hPa

Link to 5 minute data for KDCA

Wind History from DCA (wind in knots)

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Tide / Current Tables for Washington, D.C.

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Tide / Current Tables for Fort Washington, Maryland

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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 (20,4,5,8)

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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.