Monday, September16, 2019 L-36.com


Marine Weather and Tides
Potomac Heights, MD

Version 3.4
NOTICE
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.
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 6:49AMSunset 7:17PM Monday September 16, 2019 6:11 PM EDT (22:11 UTC) Moonrise 7:51PMMoonset 7:55AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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- 438 Pm Edt Mon Sep 16 2019
Rest of this afternoon..SW winds 5 kt. Waves less than 1 ft.
Tonight..NE winds 5 kt. Waves less than 1 ft. A chance of showers.
Tue..NE winds 5 to 10 kt. Waves 1 ft.
Tue night..NE winds around 5 kt. Waves 1 ft.
Wed..NE winds 5 kt. Waves less than 1 ft.
Wed night..E winds around 5 kt. Waves 1 ft.
Thu..S winds around 5 kt. Waves 1 ft or less.
Fri..Light winds. Waves 1 ft.
ANZ500 438 Pm Edt Mon Sep 16 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will shift to our southeast today. Another cold front will push through the waters tonight into Tuesday morning. High pressure then builds across the waters through the end of the week. Small craft advisories may need to be extended through the end of the work week for a portion of the waters.


7 Day Forecast for Marine Location Near Potomac Heights, MD
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location: 38.62, -77.13     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 161851
afdlwx
area forecast discussion
national weather service baltimore md washington dc
251 pm edt Mon sep 16 2019

Synopsis A cold front will cross the area tonight. High
pressure then builds over the region Tuesday through the end of
the week.

Near term through Tuesday
A cold front will cross the area this evening and will be
accompanied by an increase in clouds and few-sct showers mainly
to the left of the low track or on the north side of the front.

These are more likely to occur late tonight into the first half
of Tuesday. Showers could linger across the southwest part of
the fcst area into the afternoon under northeast winds.

Otherwise, much cooler tomorrow with clearing skies during the
afternoon.

Short term Tuesday night through Wednesday night
High pressure will build Tuesday night through the end of the
week giving way to a taste of early fall weather with highs in
the 70s and cool nights in the 50s on Wed night. No weather is
expected.

Long term Thursday through Monday
An upper-level ridge will build into the region from the southeast
Thursday through Sunday, as an upper low over the northeast departs
into the atlantic. At the surface, high pressure over the
northeastern us continues to pump in cooler air into the region
Thursday, then moves overhead on Friday. This will result in dry
conditions on both days, with temperatures on Thursday in the 70s,
and temperatures on Friday into the upper 70s or low 80s.

Surface high pressure pushes offshore Friday night through the
beginning of next week, pumping warmer and more humid air into the
region. Meanwhile, the upper-ridge continues to move overhead, ahead
of an approaching frontal system. Not expecting any precipitation
through the extended period, but by early next week, could see that
frontal boundary push through, perhaps bringing some rain with it.

Aviation 19z Monday through Saturday
Cdfnt will cross the area this evening with shifting winds to
nne bringing low CIGS (MVFR category) for a period late tonight
into late morning tue. A few showers could also accompany the
front. Clearing from northeast to southwest Tue afternoon.

Vfr conditions expected Thursday and Friday, with high pressure
dominating the weather pattern. Winds will be around 5-10 knots out
of the northeast on Thursday, switching to southwest by Friday.

Marine
Gusty nne winds expected Tue behind a frontal passage, these are
expected to last at least through wed
no marine hazards expected on Thursday or Friday, as high pressure
will dominate the weather pattern, leading to dry and calm
conditions.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 6 am to noon edt Tuesday for anz532-
533-540>542.

Small craft advisory from 6 am to 6 pm edt Tuesday for anz534-
537-543.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 18 mi71 min N 5.1 G 7 90°F 79°F1014.1 hPa (-2.0)
NCDV2 21 mi77 min SE 5.1 G 6 83°F 85°F1013.4 hPa
BSLM2 - Chesapeake Bay, MD 25 mi161 min SE 5.1 91°F 1015 hPa68°F
44062 - Gooses Reef, MD 38 mi41 min S 9.7 G 12 80°F 1015.2 hPa
SLIM2 - 8577330 - Solomons Island, MD 41 mi71 min SE 8.9 G 11 81°F 79°F1014.1 hPa (-2.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 42 mi71 min S 11 G 12 79°F 1015.1 hPa (-2.1)
TPLM2 - Thomas Point, MD 42 mi71 min SSE 6 G 7 80°F 77°F1015.2 hPa (-2.1)64°F
44063 - Annapolis 43 mi41 min SSW 3.9 G 3.9 80°F 79°F1014.2 hPa
APAM2 - 8575512 - Annapolis, MD 43 mi71 min 82°F 1013.8 hPa (-2.0)
PPTM2 - 8578240 - Piney Point, MD 46 mi71 min SSE 12 G 13
CPVM2 47 mi71 min 80°F 75°F

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi15 minS 510.00 miFair89°F60°F39%1014.1 hPa
Quantico Marine Corps Airfield - Turner Field, VA12 mi75 minS 310.00 miA Few Clouds88°F63°F43%1014.4 hPa
Washington/Reagan National Airport, DC, VA17 mi19 minN 710.00 miMostly Cloudy91°F57°F32%1014 hPa
Camp Springs / Andrews Air Force Base, MD20 mi15 minE 610.00 miPartly Cloudy85°F65°F51%1014.7 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA22 mi15 minSSE 710.00 miFair88°F62°F42%1014.5 hPa
Stafford, Stafford Regional Airport, VA23 mi16 minN 010.00 miFair87°F66°F50%1015.6 hPa

Link to 5 minute data for KDAA

Wind History from DAA (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW4CalmW3SE3CalmS4S7S5
1 day agoSE3CalmCalmSE3SE4CalmCalmCalmCalmCalmCalmCalmNW4NW7N3N6NW8NW9SW3N3CalmW4N3Calm
2 days agoSE4SE6CalmE6SE3E3SE4SE4CalmCalmCalmCalmCalmCalmSE3SE5SW4S5S9S5S5S4S7S4

Tide / Current Tables for Glymont, 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 Mount Vernon, Virginia
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Mount Vernon
Click for Map
Mon -- 04:11 AM EDT     0.39 feet Low Tide
Mon -- 06:50 AM EDT     Sunrise
Mon -- 08:54 AM EDT     Moonset
Mon -- 09:54 AM EDT     2.42 feet High Tide
Mon -- 04:15 PM EDT     0.31 feet Low Tide
Mon -- 07:15 PM EDT     Sunset
Mon -- 08:49 PM EDT     Moonrise
Mon -- 10:07 PM EDT     2.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.30.80.50.40.50.91.522.32.42.21.81.30.80.50.30.40.71.322.42.52.4

Weather Map
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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 (18,4,5,8)
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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.