Tuesday, June25, 2019 L-36.com


Marine Weather and Tides
Mount Vernon, VA

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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 5:43AMSunset 8:38PM Tuesday June 25, 2019 9:31 AM EDT (13:31 UTC) Moonrise 12:23AMMoonset 12:23PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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- 735 Am Edt Tue Jun 25 2019
Today..W winds 5 to 10 kt. Waves 1 ft.
Tonight..NW winds 5 to 10 kt. Waves 1 ft.
Wed..W winds 5 kt. Waves less than 1 ft.
Wed night..SW winds around 5 kt. Waves 1 ft.
Thu..NW winds around 5 kt. Waves 1 ft.
Thu night..SW winds around 5 kt. Waves 1 ft or less.
Fri..SW winds around 5 kt. Waves 1 ft or less.
Sat..W winds around 5 kt. Waves 1 ft.
ANZ500 735 Am Edt Tue Jun 25 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak front will cross the waters today. High pressure will build from the tennessee valley toward the mid-atlantic for the remainder of the week.


7 Day Forecast for Marine Location Near Mount Vernon, VA
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location: 38.68, -77.1     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 250800
afdlwx
area forecast discussion
national weather service baltimore md washington dc
400 am edt Tue jun 25 2019

Synopsis
A weak front will cross the area today. High pressure will
build from the tennessee valley toward the region through the
end of the week. A cold front may approach from pennsylvania
this weekend.

Near term until 6 pm this evening
Convective complex has maintained itself with the help of a low
level jet and persistent elevated instability. Convective trends
are finally weakening and any lingering showers will be exiting
to the east by 6 am.

Very subtle surface features today, as a front trough axis crosses
the area. While the wind shift will occur early in the day, the
(slight) drop in dew points will arrive in the afternoon. Some of
the cams are trying to kick off a few showers as this boundary
crosses, but have doubts as forecast soundings indicate the
cumulus later will be very shallow with very dry air above it.

Have kept forecast dry. While there is a smidge of cold
advection aloft, westerly downslope flow and plentiful sunshine
will allow temperatures to range from the mid 80s to around 90.

Short term 6 pm this evening through Thursday night
Surface high pressure will build from the west tonight and generally
remain positioned there through Thursday night. This will keep flow
from more of a westerly direction, so dew points won't be rising too
dramatically through the middle of the week. However, 850 mb thermal
ridge will slowly expand eastward, so temperatures will climb a bit
each day, with more widespread 90s by Thursday (with some heat
indices reaching the upper 90s). Lows tonight may be the
coolest of the week, ranging from the 50s in rural valley to
around 70 in the urban centers... Then becoming a bit warmer with
each successive night.

A weak boundary will be located to the north Wednesday and may try
to drop south toward the area Thursday. However, there will be
limited moisture and convergence along it, and the best mid level
forcing will likely remain north of the area. It still looks like
Wednesday would be the favored day for a stray shower or storm
to drift into northern parts of the CWA during the late
afternoon or evening, but overall dry conditions are expected.

Long term Friday through Monday
Mid-upper level ridging continues into Friday, likely near its
maximum. This will result in hot and dry conditions across the
region. High temperatures on Friday will reach into the mid 90s. Not
expecting a strong SW flow at the surface, so humidity will not be
as oppressive, with dew points in the mid 60s or so, keeping heat
indices below the century mark, but could still be in the mid-upper
90s.

A weak front looks to push through the area on Saturday, associated
with a trough moving across the northeastern u.S. This will result
in an increased chance for showers and storms. Not seeing much in
terms of cooler temperatures, but could be a degree or two cooler,
given the height falls that are occurring ahead of the system. Then
on Sunday, could see another quick cold front push through the
region, with yet another chance for some showers storms Sunday
afternoon. High temperatures could cool a bit Sunday into the upper
80s.

Mid-upper level ridging tries to build back on for the early part of
the week, but the upper trough off the northeast coast is stubborn
to move. Guidance shows some mid-upper level features rotating
around the periphery of the ridge, which could result in some
showers and storms, if they come through during peak heating in the
afternoon on Monday Tuesday. Seems less likely Monday, but Tuesday
looks to have a better shot as the ridge may begin to break down.

Highs will reach the mid 80s on Monday, and may even be slightly
cooler on Tuesday, depending on how the ridge develops.

Aviation 08z Tuesday through Saturday
Showers and storms are exiting to the east early this morning, and
it seems unlikely any aviation hazards will occur through Thursday
as high pressure builds in from the west. Winds will shift to
westerly this morning, and there may be a few gusts up to 20 kt.

Otherwise light winds are expected through the middle of the
week.

Vfr conditions expected throughout the long-term period. Although,
brief reductions could be possible Saturday afternoon with any
showers storms that may develop, particularly at the northern most
terminals.

Marine
Occasional southwesterly gusts around 20 kt are occurring over
the wider waters of the bay early this morning, but should be
subsiding as a low level jet weakens. A trough axis will pass
this morning and shift winds to the west. While a few gusts may
reach SCA criteria, especially over the northern bay, am
thinking the duration would be brief as pressure surge isn't
that strong. Most model guidance is indicating a general 10-15
kt.

Winds will remain below SCA criteria Friday and Saturday. However,
brief gusty winds could be possible with any storms that may develop
on Saturday. Not expecting any sort of widespread severe threat
though at this time.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 6 am edt early this morning for
anz532>534-537-540-541-543.

Synopsis... Ads
near term... Ads
short term... Ads
long term... Cjl
aviation... Ads cjl
marine... Ads cjl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 14 mi49 min WNW 6 G 8.9 77°F 80°F1011.4 hPa
NCDV2 25 mi49 min NW 4.1 G 8 79°F 79°F1010.6 hPa
TPLM2 - Thomas Point, MD 38 mi31 min W 8.9 G 9.9 76°F 76°F1012.1 hPa (+2.1)72°F
APAM2 - 8575512 - Annapolis, MD 39 mi43 min 82°F 1010.4 hPa
44063 - Annapolis 40 mi19 min N 9.7 G 12 77°F 77°F1011.2 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 42 mi43 min NNW 14 G 17 77°F 1011.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 42 mi43 min NW 11 G 16 79°F 77°F1010.7 hPa
CPVM2 44 mi43 min 78°F 76°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 48 mi43 min WNW 8 G 9.9 77°F 1010.6 hPa
FSNM2 48 mi55 min WNW 12 G 14 77°F 1010.7 hPa
PPTM2 - 8578240 - Piney Point, MD 48 mi44 min NNW 14 G 16
BLTM2 - 8574680 - Baltimore, MD 49 mi49 min NNW 6 G 9.9 78°F 78°F1010.2 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA5 mi35 minNW 510.00 miFair78°F69°F75%1011.8 hPa
Washington/Reagan National Airport, DC, VA13 mi39 minVar 510.00 miOvercast78°F66°F67%1011.6 hPa
Camp Springs / Andrews Air Force Base, MD16 mi95 minWNW 810.00 miFair75°F68°F79%1011.3 hPa
Quantico Marine Corps Airfield - Turner Field, VA16 mi35 minWNW 310.00 miFair79°F73°F82%1012 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA22 mi35 minNNW 610.00 miFair77°F69°F77%1012.8 hPa
College Park Airport, MD23 mi48 minNNW 310.00 miPartly Cloudy75°F66°F74%1011.2 hPa

Wind History from DAA (wind in knots)
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Last 24hrS3E4SE5SE6S5S6CalmCalmCalmSE3CalmCalmCalmCalmCalmCalmW5CalmCalmCalmCalmCalmW4NW5
1 day agoCalmCalmNW4E3SE7S6S5S7SE5S5SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3S5
2 days agoNW7NW8NW9NW7NW12
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Tide / Current Tables for Marshall Hall, Maryland
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Marshall Hall
Click for Map
Tue -- 01:22 AM EDT     Moonrise
Tue -- 02:33 AM EDT     2.40 feet High Tide
Tue -- 05:44 AM EDT     Sunrise
Tue -- 05:48 AM EDT     Last Quarter
Tue -- 08:25 AM EDT     0.56 feet Low Tide
Tue -- 01:23 PM EDT     Moonset
Tue -- 02:46 PM EDT     2.29 feet High Tide
Tue -- 08:33 PM EDT     0.36 feet Low Tide
Tue -- 08:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.22.42.42.11.61.10.80.60.60.81.21.72.12.22.32.11.61.10.60.40.40.50.9

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Tue -- 01:23 AM EDT     Moonrise
Tue -- 01:33 AM EDT     1.64 feet High Tide
Tue -- 05:45 AM EDT     Sunrise
Tue -- 05:48 AM EDT     Last Quarter
Tue -- 07:47 AM EDT     0.40 feet Low Tide
Tue -- 01:23 PM EDT     Moonset
Tue -- 01:46 PM EDT     1.57 feet High Tide
Tue -- 07:55 PM EDT     0.26 feet Low Tide
Tue -- 08:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.61.61.51.20.90.60.40.40.50.81.11.41.51.61.41.20.80.50.30.30.30.61

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.
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Wind Forecast for Baltimore, MD/Washington (9,2,3,4)
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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.