Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
Quantico, VA

Version 3.4
What's New / NOTES
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 5:48AMSunset 8:23PM Wednesday May 24, 2017 9:33 AM EDT (13:33 UTC) Moonrise 4:13AMMoonset 6:03PM Illumination 1% Phase: Waning Crescent; Moon at 28 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- 732 Am Edt Wed May 24 2017
Today..E winds 5 to 10 kt. Waves 1 ft. A chance of rain this morning. Patchy fog this morning with vsby 1 to 3 nm.
Tonight..E winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain.
Thu..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu night..W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Fri..W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Fri night..NW winds 5 to 10 kt. Waves 1 ft.
Sat..SE winds around 5 kt. Waves 1 ft. A chance of showers.
Sun..SW winds around 5 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 732 Am Edt Wed May 24 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will move away from the coast today. Another area of low pressure will move through the area Thursday. A cold front will cross the waters Thursday evening. High pressure will arrive by Saturday. Small craft advisories may be needed for portions of the waters Thursday and again on Friday.

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 240746
afdlwx
area forecast discussion
national weather service baltimore md washington dc
346 am edt Wed may 24 2017

Synopsis Low pressure will impact the region through Friday.

Weak high pressure will build over the region Saturday. Another
low pressure system will impact the area on Sunday. Weak high
pressure builds over the region next week.

Near term until 6 pm this evening
High pressure is wedged across the mid-atlantic region this
morning. An upper level disturbance is crossing the region and
light rain is moving from west to east. The back edge of rain is
currently moving through the highlands and will end from west
to east this morning. Subsidence will move into the region
behind the departing disturbance. The wedge of high pressure
will slowly weaken today and low stratus will persist through
the day. NE flow will become SE by afternoon and will also lead
to patchy fog and or mist across the eastern slopes of the
ridges through the afternoon. A southerly component to the flow
will help temps climb a bit higher today with temps reaching the
u60s l70s.

Low pressure will continue to deepen across the ohio valley tonight
while a closed upper low moves over the sfc low. Warm air advection
will increase in the low levels tonight and rain will move back into
the mid-atlantic region. Easterly flow at the sfc may enhance
rainfall across the eastern slopes of the ridges. Rainfall amts will
range from near an inch across the eastern slopes of the ridges and
the potomac highlands to a third of an inch across i-95 overnight.

The closed upper low and the sfc low will remain stacked over the
ohio valley Thursday morning. Low pressure will begin to transition
over the mtns Thursday. Lapse rates will increase by Thursday
afternoon and weak to marginal instability is expected. Although
shear profiles are very weak with the sfc low overhead enhanced lift
from a neg tilted upper level trough may result in a few
thunderstorms east of the blue ridge mtns. The best chance will be
across central va southern md especially if sfc heating is enhanced.

Temps will range from the u60s l70s across the highlands to the mid
to upper 70s across the piedmont dc metro and east.

Short term 6 pm this evening through Friday
The sfc low and upper low will move to the north Thursday evening.

Any thunderstorm activity should be east of the mid-atlantic region
thu night as post-frontal conditions are expected into Friday.

Vorticity rounding the backside of the upper low will likely move
across the mid-atlantic region into Friday leading to stubborn
clouds and the chance for showers. Clouds and showers will move to
the north by Friday afternoon and the Sun will hopefully peak out
before dusk. A few showers may linger along the allegheny front.

Temps will reach the 70s across the region Friday.

Long term Friday night through Tuesday Weak ridge of high
pressure sfc and aloft will build over the area Fri night into
sat. Despite this, model guidance show moisture overspreading
the area from the west and even generate light QPF west of the
blue ridge.

A low pressure system near chicago Sun morning will travel
northeast into lk huron by Mon morning pushing a cdfnt through
the area Sun night. Modest height falls and sfc pressure falls
will lead to convective development Sun afternoon with severe
t-storms possible especially east of the blue ridge and south of
i-66 & u.S. Hwy 50.

Dry westerly flow will prevail much of next week allowing for
longer breaks of dry weather.

Aviation 07z Wednesday through Sunday
Ifr lifr conditions expected at cho mrb iad this morning and
MVFR conditions at bwi mtn dca as rain and northeast winds
persist. CIGS expected to improve however stay MVFR at most
sites today with the exception of cho which will likely stay at
ifr. Rain will come to an end from west to east this morning.

Conditions will worsen this evening as rain moves back into the
region and CIGS and vsbys expected to go sub-MVFR. Widespread
rain comes to an end Thu morning however showers and isolated
thunderstorms are possible Thursday afternoon.

Winds become westerly behind departing low pressure system Thursday
night-Friday.VFR conditions expected during this time.

Rain possible late Fri night and sat, then showers and t-storms
likely Sun afternoon with some possibly severe especially east
of the blue ridge.

Marine
Ne winds will become easterly by this afternoon. NE winds
10-15kts with gusts 18-20kts expected across the southern md bay
zones and tidal potomac zones early this morning. Winds will
relax late this morning and through the afternoon. The gradient
tightens tonight and E winds will increase across the md
chesapeake bay and lower tidal potomac. Rain returns tonight and
continues through Thu morning. A SCA is in effect tonight-thu
morning. Low pressure moves over the waters Thursday afternoon
and winds will relax. There is a chance for thunderstorms
Thursday afternoon and smw's can not be ruled out mainly across
the southern waters. Scattered showers expected on Friday with
breezy conditions, gusting as high as 22 kt, which would require
a small craft advisory.

Gradient winds should remain below SCA levels Fri night into
early next week, but potential for strong severe t-storms sun
afternoon could generate locally high winds and waves.

Tides coastal flooding Combination of onshore flow and new
moon will result in elevated water levels with minor coastal
flooding expected at annapolis, straits point, and baltimore
next three days.

Lwx watches warnings advisories
Dc... None.

Md... Coastal flood advisory until 7 am edt this morning for mdz014.

Va... None.

Wv... None.

Marine... Small craft advisory from 6 pm this evening to 6 am
edt Thursday for anz530>534-537>543. Small craft advisory until
9 am edt this morning for anz533- 534-537-541-543.

Synopsis... Lfr
near term... Hsk
short term... Hsk
long term... Lfr
aviation... Hsk lfr
marine... Hsk lfr
tides coastal flooding... Lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 16 mi45 min N 2.9 G 5.1 59°F 68°F1005.9 hPa
44061 - Upper Potomac, MD 25 mi45 min NE 5.8 G 7.8 58°F 68°F1007.5 hPa
WASD2 - 8594900 - Washington, DC 31 mi45 min NE 1.9 G 5.1 60°F 69°F1006.8 hPa
BSLM2 - Chesapeake Bay, MD 37 mi123 min NW 1.9 53°F 1007 hPa52°F
PPTM2 - 8578240 - Piney Point, MD 45 mi45 min ENE 4.1 G 7
SLIM2 - 8577330 - Solomons Island, MD 45 mi45 min NNE 5.1 G 7 60°F 66°F
44062 - Gooses Reef, MD 46 mi33 min NNE 9.7 G 12 59°F 62°F1 ft1007.5 hPa (+1.2)
COVM2 - 8577018 - Cove Point LNG Pier, MD 47 mi45 min NNE 8 G 9.9 59°F 1007.3 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 mi37 minNE 610.00 miOvercast60°F57°F93%1007.1 hPa
Stafford, Stafford Regional Airport, VA11 mi38 minNNE 410.00 miOvercast58°F57°F100%1008.1 hPa
Fredericksburg, Shannon Airport, VA17 mi58 minNNE 410.00 miOvercast58°F58°F100%1006.8 hPa
Fort Belvoir, VA19 mi95 minN 09.00 miOvercast58°F55°F91%1007.1 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA22 mi37 minE 510.00 miOvercast59°F55°F90%1008.2 hPa

Wind History from NYG (wind in knots)
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Last 24hrNE9E10NE7NE7E6E6E7SE6E9E8E7E8NE8NE12N5N6N6N5E8NE7E7E3N6NE6
1 day agoSE4S3CalmS4SE43E4S5S3S3SE3CalmNW4W4N3W3N7N8N9N7NE4N6N4NE8
2 days agoCalmCalmSE3CalmSE8SE6SE4SE10SE10SE12SE9SE7S8S8S4S5NE5E6NE6E6E5E5CalmCalm

Tide / Current Tables for Liverpool Point, Potomac River, Maryland
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Liverpool Point
Click for Map
Wed -- 05:03 AM EDT     1.75 feet High Tide
Wed -- 05:13 AM EDT     Moonrise
Wed -- 05:50 AM EDT     Sunrise
Wed -- 12:09 PM EDT     0.05 feet Low Tide
Wed -- 05:39 PM EDT     1.50 feet High Tide
Wed -- 07:02 PM EDT     Moonset
Wed -- 08:21 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.40.91.31.61.71.61.310.70.40.20.10.10.50.91.31.51.51.310.60.30.2

Tide / Current Tables for Aquia Creek, Potomac River, Virginia
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Aquia Creek
Click for Map
Wed -- 05:13 AM EDT     Moonrise
Wed -- 05:24 AM EDT     1.64 feet High Tide
Wed -- 05:51 AM EDT     Sunrise
Wed -- 12:16 PM EDT     0.05 feet Low Tide
Wed -- 06:00 PM EDT     1.41 feet High Tide
Wed -- 07:02 PM EDT     Moonset
Wed -- 08:21 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.30.71.21.51.61.61.410.70.40.20.10.10.40.71.11.31.41.310.70.40.2

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 (9,2,3,4)
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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.