Thursday, October19, 2017 L-36.com


Marine Weather and Tides
Quantico, VA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:21AMSunset 6:25PM Thursday October 19, 2017 11:29 PM EDT (03:29 UTC) Moonrise 6:01AMMoonset 5:45PM Illumination 0% Phase: New Moon; Moon at 29 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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ANZ536 Tidal Potomac From Indian Head To Cobb Island- 1031 Pm Edt Thu Oct 19 2017
Rest of tonight..NW winds 5 kt. Waves less than 1 ft.
Fri..NW winds 5 to 10 kt. Waves 1 ft.
Fri night..NW winds around 5 kt. Waves 1 ft or less.
Sat..SE winds around 5 kt. Waves 1 ft or less.
Sat night..S winds around 5 kt. Waves 1 ft.
Sun..S winds around 5 kt. Waves 1 ft.
Sun night..S winds 5 kt. Waves less than 1 ft.
Mon..S winds 5 to 10 kt. Waves 1 ft. Showers likely through the night.
Tue..W winds 5 to 10 kt. Waves 1 ft. Showers likely .
ANZ500 1031 Pm Edt Thu Oct 19 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain near the region through the weekend. A weak front will pass by to the north tonight before a stronger front approaches early next week. A small craft advisory may be needed for portions of the waters Monday through Tuesday.

7 Day Forecast for Marine Location Near Quantico, VA
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location: 38.47, -77.27     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 200040
afdlwx
area forecast discussion
national weather service baltimore md washington dc
840 pm edt Thu oct 19 2017

Synopsis
High pressure will remain across the mid atlantic through this
weekend. A low pressure system will affect the region early
next week.

Near term until 6 am Friday morning
An elongated area of high pressure stretches from the deep
south northeastward across the southern appalachians and off
the mid-atlantic coastline this evening. At the same time, a
weak cold front is tracking through the ohio valley into
pennsylvania.

The weak front will push east-southeastward tonight, with its
tail end crossing the region overnight. Aside from a shift to
light northwest winds and a few added cirrus, no real sensible
weather impacts are expected with this decaying front. Although
as winds do turn to the northwest, there may be some terrain-
induced strato-cumulus along the allegheny front by morning.

Should still have decent radiational cooling tonight, but with
some added light winds and higher dewpoints, won't be as ideal
as previous nights. Lows in the 40s to near 50f for most, except
low mid 50s in the urban centers and along the shorelines of
the chesapeake and tidal potomac.

Short term 6 am Friday morning through Saturday night
High pressure will gradually build back overhead for Friday and
Saturday, providing for mostly sunny skies, relatively light
winds, and mild temperatures. There may be some patchy fog each
late night morning, but nothing widespread expected. Highs will
reach the low to mid 70s, with lows in the 40s 50s.

Long term Sunday through Thursday
High pressure system will move away from the east coast on
Sunday. A cold front approaches from the west with a wave of low
pressure tracking northeast from the gulf states towards the
mid-atlantic region Monday into Tuesday. This system will put an
end to the dry spell we've been experiencing, with
precipitation associated with it starting sometime on Monday
and remaining into Tuesday.

The pattern will evolve from warm and dry to cold and unsettled
as this system moves through, with some uncertainty on the
timing. In the upper levels, a large and deep trough will move
over the eastern CONUS Wednesday into Thursday. Guidance
suggests that this could bring some upslope showers on
Wednesday, and then dry into Thursday.

High temperatures on Monday will be between the low to mid 70s
decreasing into the 60s into Thursday.

Aviation 01z Friday through Tuesday
Patchy fog possible at mrb cho iad over the next few mornings,
but chances are low and any fog would be brief. Otherwise,VFR
through Sunday night with relatively light winds under high
pressure.

Precipitation associated with a cold frontal system is then
expected later Monday into Tuesday, which could bring sub-vfr
conditions at times.

Marine
A weak cold front will cross the waters overnight. A pressure
surge behind the boundary will cause northwest winds to increase
toward morning. While a surface inversion will limit mixing and
wind gust potential along the shores, over the open warmer
waters, gusts in excess of 20 knots are possible late tonight
into Friday morning. Therefore, will leave small craft advisory
in effect from through noon Friday. Winds will drop below sca
criteria by Friday afternoon and remain below through Sunday.

Southerly winds will increase out ahead of the next frontal
system Monday and Tuesday, and a small craft advisory may be
needed.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until noon edt Friday for anz531>534-537-
539>541-543.

Synopsis... Mm
near term... Bjl mm
short term... Mm
long term... Imr
aviation... Bjl mm imr
marine... Bjl mm imr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 16 mi41 min Calm G 1.9 55°F 66°F1020.5 hPa
WASD2 - 8594900 - Washington, DC 31 mi41 min SSW 1.9 G 2.9 62°F 68°F1021.4 hPa
BSLM2 - Chesapeake Bay, MD 37 mi119 min Calm 51°F 1021 hPa50°F
PPTM2 - 8578240 - Piney Point, MD 45 mi47 min WSW 6 G 7
SLIM2 - 8577330 - Solomons Island, MD 45 mi41 min SW 4.1 G 5.1 62°F 69°F1021.1 hPa
44062 - Gooses Reef, MD 46 mi29 min SW 9.7 G 12 66°F 68°F1 ft1020.2 hPa (+0.3)
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi41 min S 5.1 G 5.1 64°F 1022 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Quantico Marine Corps Airfield - Turner Field, VA3 mi33 minWNW 610.00 miFair54°F53°F97%1021.9 hPa
Stafford, Stafford Regional Airport, VA11 mi34 minN 010.00 miFair46°F46°F100%1022.7 hPa
Fredericksburg, Shannon Airport, VA17 mi34 minN 010.00 miFair51°F50°F98%1021.3 hPa
Fort Belvoir, VA19 mi33 minN 010.00 miFair50°F48°F95%1022 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA22 mi33 minSSE 310.00 miFair50°F46°F89%1023.2 hPa

Wind History from NYG (wind in knots)
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Last 24hrNW7NW6W6NW6W3NW4W3W5--W4S8S7S6S7S7S6S6S7SW5SW3W5NW5NW5NW6
1 day agoNW6NW6NW6NW6NW5NW6NW4NW3NW5NW4CalmS4S3S6S6S6S6S8S8S8NW4NW5NW5NW7
2 days agoNW8NW8NW6N9N6N6N7NW5NW8N6N8NE75E7E7SE4E4CalmCalmNW4W4W5W6NW8

Tide / Current Tables for Liverpool Point, Potomac River, Maryland
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Liverpool Point
Click for Map
Thu -- 12:32 AM EDT     -0.02 feet Low Tide
Thu -- 06:16 AM EDT     1.54 feet High Tide
Thu -- 07:00 AM EDT     Moonrise
Thu -- 07:22 AM EDT     Sunrise
Thu -- 12:46 PM EDT     -0.01 feet Low Tide
Thu -- 03:12 PM EDT     New Moon
Thu -- 06:24 PM EDT     Sunset
Thu -- 06:36 PM EDT     1.62 feet High Tide
Thu -- 06:45 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
000.30.71.11.41.51.51.20.90.60.30.1-00.20.611.41.61.61.41.10.70.5

Tide / Current Tables for Aquia Creek, Potomac River, Virginia
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Aquia Creek
Click for Map
Thu -- 12:39 AM EDT     -0.02 feet Low Tide
Thu -- 06:38 AM EDT     1.44 feet High Tide
Thu -- 07:00 AM EDT     Moonrise
Thu -- 07:22 AM EDT     Sunrise
Thu -- 12:53 PM EDT     -0.01 feet Low Tide
Thu -- 03:12 PM EDT     New Moon
Thu -- 06:25 PM EDT     Sunset
Thu -- 06:45 PM EDT     Moonset
Thu -- 06:57 PM EDT     1.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-00.20.50.91.21.41.41.20.90.60.30.1-00.10.50.91.21.41.51.41.10.80.5

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Baltimore, MD/Washington (23,6,7,8)
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Ground Weather Radar Station Sterling, VA
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weather_mapweather_map weather_map

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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.