Friday, July10, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Kings Park, 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 5:51AMSunset 8:37PM Friday July 10, 2020 11:11 AM EDT (15:11 UTC) Moonrise 11:15PMMoonset 10:10AM Illumination 74% Phase: Waning Gibbous; Moon at 20 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
ANZ535 Tidal Potomac From Key Bridge To Indian Head- 1037 Am Edt Fri Jul 10 2020
.small craft advisory in effect until 6 pm edt this evening...
Rest of today..N winds 10 kt. Waves 1 ft. Scattered showers.
Tonight..N winds 5 to 10 kt...becoming S in the late evening and overnight. Waves 1 ft. A chance of showers.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sat night..W winds 5 to 10 kt. Waves 1 ft.
Sun..SW winds 5 kt. Waves less than 1 ft.
Sun night..SW winds around 5 kt. Waves 1 ft. A chance of showers.
Mon..NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms.
Tue..SW winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1037 Am Edt Fri Jul 10 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Tropical storm fay is expected to move northward into the new york city/new jersey/long island area and then into new england through tonight. A cold front will approach from the ohio river valley tonight into Saturday, then stall between interstate 95 and the coast through the weekend. High pressure is expected to build over the southeastern united states early next week. Sporadic gale force wind gusts are possible over portions of the waters this morning. Please consult the latest national hurricane center advisory for information on tropical storm fay.


7 Day Forecast for Marine Location Near Kings Park, VA
   Hourly   EDIT   Help
location: 38.8, -77.27     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 101419 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1019 AM EDT Fri Jul 10 2020

SYNOPSIS. Tropical Storm Fay is expected to move northward into the New York City/New Jersey/Long Island area and then into New England through tonight. A cold front will approach from the Ohio River Valley tonight into Saturday, then stall between Interstate 95 and the coast through the weekend. High pressure building over the southeastern United States is expected to bring increasingly hot and humid weather for much of next week.

NEAR TERM /THROUGH TONIGHT/. As of 10am, Tropical Storm Fay was located about 100 mile east of the southern Delaware coast with a max sustained speed of 50 knots, moving to the north at 8 mph. Satellite imagery depicts a majority of the convection to the northeast of the center as Fay navigates along the Gulf Stream. The precipitation shield has crept into portions of Harford county and eastern Baltimore County. I expect rain to reach as far west as eastern Anne Arundel and central Baltimore County and city. Can't rule out some showers reaching eastern Carroll County this morning and early afternoon

Fay will move northward through tonight between the high pressure ridge over the western Atlantic and an approaching trough from the Great Lakes and Ohio Valley region. We will see rain chances increase east of the Blue Ridge this morning as the center of Fay passes just east of the Delmarva, and rain showers track westward from the Bay, with the highest rain chances remaining east of I-95. The latest deterministic Euro and ensemble guidance has shifted a bit further west with the QPF shield, highlighting a 50% chance of exceeding 1 inch across extreme northeastern MD and the eastern half of Harford County through this evening. With the bulk of other guidance a bit further east with the QPF shield, including the 00z CAMs, will advertise upwards of 0.75 to 1.00 inch across this portion of our CWA. Generally between a quarter to a half inch of rain is expected east of I-95 across the remaining portions of central and northeastern MD. As Fay begins to pull off to our northeast late this afternoon and evening, associated showers and isolated thunderstorms will tag along, allowing rain chances along the I-95 corridor to wane.

Further west, the aforementioned trough will be approach to our west late this afternoon and this evening, which will help spark scattered showers and thunderstorms along and just east of the Alleghenies. Timing of this activity is favoring more this evening and overnight, which would have a less diurnal flavor and ultimately lower intensity as the trough takes on a negative tilt. Activity will wane overnight with mostly dry conditions prevailing after midnight area wide.

Temperature wise today, the heat and humidity will continue. How quickly cloud cover from Fay is able to break to our north and east will determine how warm the metro areas get. Not out of the question that DC makes a run at 90 degrees late this afternoon as clouds begin to break. Elsewhere the 80s will hold on across central and northeast MD given increased cloud cover and rain chances, while upper 80s to middle 90s will be the norm south and west of the Blue Ridge Mountains. Mild tonight with temperatures holding in the middle 60s to middle 70s.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/. The upper trough and cutoff low will position itself over the eastern Great Lakes on Saturday as a ridge of surface high pressure builds over our area. While our CWA will remain underneath the broad upper trough, can't rule out afternoon showers and storms, but coverage has trended downward the last couple of days with the best lift residing to our north. Will carry the highest chance POPs over the mountains with the aid of terrain circulations, but a washout doesn't look likely given the latest guidance. Highs will be in the upper 80s to middle 90s, dropping back into 60s and lower 70s Saturday night with dry conditions.

Looks to be a better shot of showers and storms late Sunday afternoon and evening as another shortwave dips further south through the Ohio Valley and into our region, as the heat and humidity persists. Activity will diminish Sunday night with the loss of daytime heating, but will hold on to shower chances for at least the first half of the night.

LONG TERM /MONDAY THROUGH THURSDAY/. Upper level troughing will be positioned across the eastern CONUS on Monday. A surface front will likely be near or east of I-95, though it will be slow to move along with SW flow aloft. Showers and thunderstorms will be possible along and ahead of the front. The farther east it ends up by peak heating, the lower rain chances will be since drier air will arrive on westerly winds behind the front. There could be a chance of showers over the Appalachians as well depending on the position of the trough axis and if deep enough moisture can rotate down from the Great Lakes. Should see a slight downtick in temperatures behind the front, though they should remain close to normal.

Troughing will remain overhead on Tuesday, though at this time, the best forcing and moisture are projected to be north of the area. Therefore, convective coverage should be low. Temperatures will be similar to Monday . near or slightly above normal.

For the middle to end of next week, the trough will move off to the east, and upper level ridging and associated heat will expand eastward from the central/southern US. GFS/GEFS are on the slower side of the envelope in the progression of the warmer air aloft, so there's some uncertainty for temperatures on Wednesday. There's better agreement for high heat and humidity on Thursday, with heat indices over 100 possible. Thunderstorms chances remain minimal on Wednesday with little in the way of forcing and potential subsidence. By Thursday, there are hints amongst guidance that a subtle shortwave trough and/or surface boundary could be near the area, which would serve as a better focus for convective development.

AVIATION /14Z FRIDAY THROUGH TUESDAY/. MVFR CIGs expected at our eastern terminals this morning as Tropical Storm Fay passes just east of the Delmarva Peninsula, and north northeast winds average around 10 knots. Showers associated with Fay may deliver brief episodes of sub VFR VIS through the middle portion of the afternoon at BWI/MTN, less of a threat at IAD/DCA.

VFR conditions expected to prevail tonight and much of Saturday under a light westerly breeze. Shower and thunderstorm chances could deliver sub VFR conditions late Sunday at MRB/CHO, with less confidence of such an occurrence further east.

Light winds and VFR conditions will prevail Monday and Tuesday. Some thunderstorm potential may linger along the I-95 corridor Monday, with minimal chances on Tuesday.

MARINE. Solid SCA conditions expected across the waters today as Tropical Storm Fay passes just east of the Delmarva Peninsula. Can't rule out some sporadic gale gusts over the lower and middle portion of the Chesapeake Bay this morning as the gradient tightens. Elected to hold on to an SCA as confidence is low in gale gusts persisting longer than two hours. The gradient relaxes this evening as Fay pulls off to our northeast and northerly winds fall below SCA thresholds. A weak gradient will prevail this weekend under a light westerly flow, thus SCA conditions are not expected at this time.

A front will cross the waters Monday or Monday night. If the front is slow to progress east, thunderstorms will be possible Monday afternoon. West winds may be near SCA criteria behind the front, but confidence is low at this time. Light west winds will continue Tuesday with a minimal chance of showers/storms.

TIDES/COASTAL FLOODING. Tidal anomalies are running around one foot above normal as of early this morning. These anomalies should decrease through tonight due to northerly flow around the backside of Tropical Storm Fay as it departs toward New England. Once winds go light and then southerly this weekend, water levels should increase again. This will bring a renewed threat for minor tidal flooding at some sites.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 PM EDT this evening for ANZ530>543.

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


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
WASD2 - 8594900 - Washington, DC 14 mi54 min N 6 G 8.9 81°F 84°F1011 hPa
BSLM2 - Chesapeake Bay, MD 30 mi162 min N 1.9 1010 hPa
NCDV2 35 mi54 min NNW 7 G 11 80°F 85°F1009.8 hPa
APAM2 - 8575512 - Annapolis, MD 44 mi54 min N 8.9 G 14 78°F 83°F1009.9 hPa
TPLM2 - Thomas Point, MD 45 mi72 min N 25 G 27 77°F 81°F1010.2 hPa (-1.2)73°F
44062 - Gooses Reef, MD 48 mi36 min NNW 19 G 21 79°F 81°F
BLTM2 - 8574680 - Baltimore, MD 49 mi54 min ENE 9.9 G 16 78°F 85°F1010.5 hPa
CPVM2 49 mi54 min 78°F 74°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 49 mi54 min NNE 12 G 14 78°F 1010.7 hPa
FSNM2 49 mi66 min N 12 G 16 77°F 1010.8 hPa

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last
24hr
SE2
G7
E4
G8
E3
G10
SE5
G8
SE6
G9
SE5
G9
E4
G10
E5
G12
SE3
G10
E3
G7
SE2
G5
E1
G6
SE4
NE2
G5
E2
G6
NE3
NE3
N3
G8
N2
G6
N5
G9
NE3
G7
N4
G7
N4
G9
N7
G12
1 day
ago
S4
G8
S5
SW6
S7
SW7
S6
G12
S7
G10
SE8
G13
SE7
S4
G7
SE4
SE4
SE4
SW4
G7
S5
G8
SE2
--
NE1
--
E1
--
NE2
E1
G4
SE4
G7
2 days
ago
SE4
--
SW4
NW1
G6
SE2
S6
SE6
G9
SE8
G11
E2
G6
E1
SE1
G4
S5
SE4
S6
S3
G6
SE4
G7
S4
G8
SE3
SE3
SE4
S4
SE2
S4
SE3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA7 mi76 minNNW 810.00 miMostly Cloudy83°F71°F68%1011.4 hPa
Washington/Reagan National Airport, DC, VA13 mi20 minN 1110.00 miMostly Cloudy82°F72°F72%1011.1 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA14 mi16 minN 1210.00 miA Few Clouds85°F72°F65%1011.9 hPa
Washington/Dulles International Airport, DC, VA15 mi20 minNNW 910.00 miMostly Cloudy82°F69°F65%1011.1 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi16 minN 710.00 miMostly Cloudy87°F70°F57%1011 hPa
Camp Springs / Andrews Air Force Base, MD21 mi16 minN 1110.00 miPartly Cloudy80°F71°F75%1011.2 hPa
College Park Airport, MD22 mi37 minNNW 610.00 miOvercast78°F68°F72%1010.8 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
12
PM
1
PM
2
PM
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
Last 24hrSE3CalmE3E3SE7CalmE3CalmE4CalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmNW7NW6N8N5
1 day agoSE6S8SE5SE4S6S5SE5SE6SE6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3
2 days agoCalmE4SE5SE3SE5SE7S7SE5CalmSE4SE5SE4S3CalmCalmS4CalmCalmCalmCalmSE4S4SE4S4

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


Tide / Current Tables for Chain Bridge, one mile below, Washington, D.C.
   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 (11,2,3,4)
      (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.