Sunday, August25, 2019 L-36.com


Marine Weather and Tides
Kings Park, 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 6:30AMSunset 7:51PM Sunday August 25, 2019 7:04 AM EDT (11:04 UTC) Moonrise 12:07AMMoonset 3:06PM Illumination 26% Phase: Waning Crescent; Moon at 25 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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 435 Am Edt Sun Aug 25 2019
Rest of the overnight..N winds 5 kt. Waves less than 1 ft.
Today..NE winds 5 to 10 kt. Waves 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Mon..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon night..E winds 5 kt. Waves less than 1 ft. A chance of showers.
Tue..E winds 5 kt. Waves less than 1 ft. A chance of showers.
Tue night..SE winds 5 kt. Waves less than 1 ft. A chance of showers.
Wed..W winds 5 kt. Waves less than 1 ft. A chance of tstms. Showers likely .
Thu..NW winds around 5 kt. Waves 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 435 Am Edt Sun Aug 25 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain across the northeastern united states today. Low pressure will develop off the carolina coast today and Monday before moving northeast out to sea Tuesday. A cold front will approach the waters Wednesday. Small craft advisories may be needed Monday into Monday night.


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


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 250759
afdlwx
area forecast discussion
national weather service baltimore md washington dc
359 am edt Sun aug 25 2019

Synopsis
Strong high pressure will build north of the region today. Low
pressure likely will develop off the carolina coast early in the
week and move out to sea by Tuesday. A cold front will cross
the region on Wednesday.

Near term through tonight
High pressure ridging southward to the east of the appalachian
mountains will promote dry conditions today. A shower or two can't
be ruled out over southern maryland or along the chesapeake bay
coastline and adjacent areas later this afternoon and early evening.

Temperatures will reach the middle to maybe upper 70s today before
dropping into the middle to upper 50s tonight.

Short term Monday through Tuesday night
High pressure will move out to the northeast Monday and Monday
night. A persistent wind from the east or northeast will usher in
additional low-level moisture during this period. Dewpoint
temperatures, or the indication of the amount of moisture in the
air, will gradually rise out of the 50s into the 60s during the day.

With this increased moisture and departing high pressure, additional
showers are expected to develop not just in the eastern zones but
parts of the virginia piedmont, along the blue ridge, and in the
potomac highlands Monday afternoon and evening. Temperatures will
reach the middle 70s then fall only into the middle 60s Monday
night.

About the time that showers Monday evening begin to wind down or
dissipate, we could have a tropical system lingering off the east
coast near the virginia and north carolina shoreline. This system is
expected to push onward toward the northeast over the open atlantic
Tuesday and Tuesday and not have any path toward the delmarva
beaches since there will be an upper level trough approaching from
the ohio valley. Although we don't anticipate a direct impact with
this system Tuesday into Tuesday night, it could have an effect on
our coastal waters of the chesapeake bay and tidal potomac in terms
of coastal flooding. Also, showers and perhaps a diurnal
thunderstorm or two could evolve in parts of our region. The east to
southeast component to the wind expected Tuesday could mean that any
modest convection could evolve due to upslope along the blue ridge
and potomac highlands. Temperatures Tuesday should approach 80
degrees in most places.

Long term Wednesday through Saturday
A trough axis crossing the great lakes Wednesday will push a cold
front across the mid atlantic. The atmosphere will be sufficiently
moist prior to the frontal passage, with respectable instability and
modest shear--certainly enough to justify a shower thunderstorm
forecast at high chance to maybe likely levels. That said, it is
unlikely that it will be an all day rainfall; rather the
precipitation FROPA seems to be focused on the timeframe of peak
diurnal heating, although the lingering upper trough jet suggests it
may not move through quickly. Will be keeping chance pops east of
the blue ridge into Wednesday night.

For the rest of the week, continental high pressure building toward
the east coast will be the primary weather feature. Consequently
temperatures will remain rather mild for late august (highs in the
lower-mid 80s, lows mid 50s-mid 60s).

Aviation 08z Sunday through Thursday
Vfr conditions expected with high pressure to the north then to the
northeast by Tuesday. Any showers should be isolated Monday and
Tuesday with low confidence as to which terminals may or may not
encounter one of these showers. Winds northeast around 10 knots
through Monday night. Winds becoming southeasterly around 10 knots
Tuesday into Tuesday night.

Flight restrictions may linger into Wednesday due to low clouds and
perhaps vsby as a result of east flow. Ceilings will gradually lift
through the day, but an approaching cold front will support a chance
of showers thunderstorms by afternoon evening. While exact
convective impact uncertain, odds suggest it wouldn't be widespread
or of long duration. But, the lingering moisture could result in
restrictions Wednesday night.

Thursday should fare better as high pressure builds.VFR likely.

Marine
A small craft advisory remains in effect through this afternoon
for much of the chesapeake bay and tidal potomac. An extention
to this small craft advisory has been issued for tonight into
early Monday morning. Depending on the gradient between the high
to the north and the developing tropical system along the east
coast, additional small craft advisories may be needed through
the day Monday into Monday night.

The pressure gradient likely won't be strong enough to support small
craft conditions Wednesday or Thursday. But, a frontal passage late
Wednesday will support showers thunderstorms so local marine
warnings possible.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 6 pm this evening to 6 am edt Monday
for anz530-531-536-538-539.

Small craft advisory until 6 am edt Monday for anz532-533-
540>542.

Small craft advisory until 6 am edt Monday for anz534-537-543.

Synopsis... Klw hts
near term... Klw
short term... Klw
long term... Hts
aviation... Klw hts
marine... Klw hts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 14 mi46 min Calm G 1.9 1022.6 hPa
BSLM2 - Chesapeake Bay, MD 30 mi154 min NW 1 60°F 1022 hPa60°F
NCDV2 35 mi52 min N 1.9 G 4.1 66°F 83°F1021 hPa
APAM2 - 8575512 - Annapolis, MD 44 mi46 min 68°F 1022 hPa
TPLM2 - Thomas Point, MD 45 mi64 min NNE 12 G 14 69°F 80°F1023.1 hPa (+0.0)56°F
44062 - Gooses Reef, MD 48 mi40 min E 14 G 16 70°F 1022.7 hPa
BLTM2 - 8574680 - Baltimore, MD 49 mi52 min NE 7 G 8.9 66°F 80°F1022.4 hPa
CPVM2 49 mi52 min 70°F 57°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 49 mi46 min NNE 9.9 G 12 65°F 1022.7 hPa
FSNM2 49 mi58 min NNE 11 G 13 65°F 1022.4 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA7 mi68 minN 010.00 miOvercast60°F58°F93%1022.6 hPa
Washington/Reagan National Airport, DC, VA13 mi72 minNE 810.00 miMostly Cloudy66°F57°F75%1022.5 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA14 mi68 minN 010.00 miOvercast60°F59°F96%1023 hPa
Washington/Dulles International Airport, DC, VA15 mi72 minN 310.00 miOvercast64°F55°F75%1022.4 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi68 minNW 610.00 miMostly Cloudy62°F60°F93%1022.4 hPa
Camp Springs / Andrews Air Force Base, MD21 mi68 minNNE 610.00 miA Few Clouds60°F56°F87%1022.9 hPa
College Park Airport, MD22 mi81 minN 010.00 miPartly Cloudy0°F0°F%1022.3 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrNW3N3N3CalmCalmNE4CalmN4NW4CalmNE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmN3N4NW5N6N4NW5NW4CalmNW8NW7NW6CalmCalmCalmNW4NW4NW5NW4CalmCalmNW3Calm
2 days agoCalmCalmCalmW5NW7W7W4--W6S7
G14
------S3SW7SW5S3S3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Marshall Hall, Potomac River, Maryland
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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.
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
GOES 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 (7,2,3,4)
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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.