Tuesday, June27, 2017 L-36.com


Marine Weather and Tides
Port Tobacco Village, MD

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 5:45AMSunset 8:39PM Tuesday June 27, 2017 6:19 AM EDT (10:19 UTC) Moonrise 8:45AMMoonset 10:34PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 508 Am Edt Tue Jun 27 2017
Today..W winds 5 kt. Waves less than 1 ft. Scattered showers this morning, then scattered showers and tstms this afternoon.
Tonight..NW winds 5 kt. Waves less than 1 ft.
Wed..SW winds around 5 kt. Waves 1 ft.
Wed night..S winds 5 kt. Waves less than 1 ft.
Thu..SW winds 10 to 15 kt. Waves 1 ft.
Thu night..SW winds 5 to 10 kt. Waves 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 508 Am Edt Tue Jun 27 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak cold front will cross the chesapeake bay region tonight. High pressure will move over the area Wednesday before shifting to bermuda through Thursday. Small craft advisory conditions are possible over portions of the waters Thursday.

7 Day Forecast for Marine Location Near Port Tobacco Village, MD
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location: 38.44, -77.11     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 270759
afdlwx
area forecast discussion
national weather service baltimore md washington dc
359 am edt Tue jun 27 2017

Synopsis
A weak level trough will move track north of the region today.

High pressure builds over the area Wednesday before moving
offshore Thursday. Warm conditions expected towards the end of
the week and through the weekend.

Near term today
As of 3am, an upper trough rounds the great lakes (with the axis
from mi to st. Louis) per water vapor imagery. A 1021mb surface high
is centered over the central great plains. This surface high will
continue to drift east in the wake of the upper trough axis to the
central mid-atlantic through tonight. The high center will move off
the mouth of the chesapeake bay Wednesday. West flow and cold air
advection under the upper trough will keep temperatures below normal
through Wednesday night.

A weak cold front which switched the wind direction from SW to NW is
still moving SE across st. Marys county and will clear the md
portion of the chesapeake bay by 5am. A line of showers and
thunderstorms developed over the northern chesapeake bay as the
trough crossed those warm waters earlier tonight. A similar
phenomenon is possible this evening as another cold front (this one
under the upper trough axis) pushes east through the area.

The northern potomac highlands will see light to locally moderate
showers move east across the area through 7am. These should
generally dissipate as they encounter downsloping east of the
allegheny front. However, this activity is riding potential
vorticity advection ahead of the upper trough axis and the early
diurnal heating this time of year should enable redevelopment east
of the blue ridge per high resolution guidance.

Maintained low chance pops east of the blue ridge for this afternoon
when a second round of precip is likely given the approach of the
upper trough axis and peak heating.

Max temps raised to low 80s today as 11c 850mb temps mix down in
westerly flow.

Short term tonight through Thursday night
The surface high pressure center crosses the lwx CWA Wednesday
morning. Return southerly flow develops Wednesday afternoon with a
gradual return to summerlike conditions. Pressure gradient looks
light enough for good radiational cooling Wednesday night.

Max temps around 90f on Thursday with dewpoints rising into the 60s.

Long term Friday through Monday
High pressure will have moved well offshore by Friday. This
will allow warmth humidity to stream into the mid atlantic.

Upper level ridge will not bring the east coast especially high
heights so expect to see highs around end-of-june climo norms
of near 90.

Low pressure is expected to spin over ontario quebec this
weekend. This will allow a weak cold front trough to be in the
vicinity of the mid atlantic which could provide a focus for
shower thunderstorm activity, although by no means should the
weekend be a washout.

Looking out to the 4th of july - there are differences between
the euro and gfs. One thing seems certain is that the possibility
of it being an extremely hot day does not look to be in the
cards. Euro shows east coast "in between short waves" while gfs
has a short wave approaching the appalachians tuesay night. We
have a chance of showers thunderstorms in the forecast but we'll
continue to monitor in the coming days.

Aviation 08z Tuesday through Saturday
Vfr prevails through the week as high pressure slowly builds from
the west. Passing shower isolated thunderstorm both this morning and
later this afternoon across the dc metros ahead of a cold front.

High pressure overhead Wednesday with return southerly flow into the
weekend.

Majority of Friday Saturday should beVFR. There will be
potential for showers thunderstorms - especially Saturday, which
could drop conditions briefly belowVFR.

Marine
Weak cold front will continue moving SE through southern md bay
waters through sunrise with wly nwly flow through tonight as surface
high pressure slowly builds.

Return southerly flow begins Wednesday night as the high shifts to
bermuda.

Winds expected to be below SCA values Friday Saturday.

Showers isolated thunderstoms will be possible on the waters
Saturday.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 4 am edt early this morning for
anz533-534-537-540-541-543.

Prodcuts... Baj woody!


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 9 mi50 min NW 1.9 G 2.9 67°F 79°F1015.1 hPa
44061 - Upper Potomac, MD 24 mi62 min NW 3.9 G 5.8 69°F 81°F1016.1 hPa
WASD2 - 8594900 - Washington, DC 30 mi50 min WNW 1.9 G 4.1 70°F 82°F1015.6 hPa
BSLM2 - Chesapeake Bay, MD 32 mi110 min Calm 57°F 1016 hPa57°F
SLIM2 - 8577330 - Solomons Island, MD 36 mi50 min NNW 2.9 G 5.1 70°F 78°F
PPTM2 - 8578240 - Piney Point, MD 37 mi50 min NNE 4.1 G 6
44062 - Gooses Reef, MD 38 mi40 min N 14 G 18 74°F 1016.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 39 mi50 min N 12 G 16 73°F 1016.1 hPa
LWTV2 - 8635750 - Lewisetta, VA 46 mi50 min NW 2.9 G 4.1 68°F 79°F1015.7 hPa
TPLM2 - Thomas Point, MD 48 mi80 min NW 7 G 8 70°F 77°F

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Quantico Marine Corps Airfield - Turner Field, VA11 mi24 minWNW 510.00 miOvercast64°F57°F78%1017.6 hPa
Stafford, Stafford Regional Airport, VA19 mi25 minN 010.00 miLight Rain58°F57°F99%1018.6 hPa
Fort Belvoir, VA20 mi82 minN 010.00 miMostly Cloudy60°F55°F85%1016.2 hPa
Fredericksburg, Shannon Airport, VA22 mi25 minN 010.00 miOvercast62°F61°F100%1016.9 hPa

Wind History from NYG (wind in knots)
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Last 24hrNW5NW3CalmNW8NW6NW105SE8S6SE4S7S8S11SW6SW5S5W3NW7NW6NW6NW6NW5NW6W5
1 day agoNW6NW7NW5N54N8NW75NW8NW11NW11NW6N6N8N7W5NW6NW6NW7NW8NW6NW9NW8NW6
2 days agoNW6W6W8NW8
G17
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N11N9NW6N9N7NW9N4N5NW6NW6NW6NW6NW6NW4NW6NW7W4NW5

Tide / Current Tables for Goose Bay, Port Tobacco River, Potomac River, Maryland
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Goose Bay
Click for Map
Tue -- 12:59 AM EDT     0.06 feet Low Tide
Tue -- 05:46 AM EDT     Sunrise
Tue -- 06:55 AM EDT     1.90 feet High Tide
Tue -- 09:45 AM EDT     Moonrise
Tue -- 01:41 PM EDT     -0.04 feet Low Tide
Tue -- 07:35 PM EDT     1.74 feet High Tide
Tue -- 08:36 PM EDT     Sunset
Tue -- 11:34 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.10.20.61.11.61.81.91.71.410.60.30-00.20.71.11.51.71.71.51.10.8

Tide / Current Tables for Maryland Point Light, Potomac River, Maryland
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Maryland Point Light
Click for Map
Tue -- 02:22 AM EDT     0.04 feet Low Tide
Tue -- 05:47 AM EDT     Sunrise
Tue -- 08:03 AM EDT     1.42 feet High Tide
Tue -- 09:46 AM EDT     Moonrise
Tue -- 03:04 PM EDT     -0.03 feet Low Tide
Tue -- 08:36 PM EDT     Sunset
Tue -- 08:43 PM EDT     1.29 feet High Tide
Tue -- 11:34 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.20.10.10.30.71.11.31.41.31.10.80.50.30.1-00.10.40.81.11.31.31.10.9

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 (6,6,7,8)
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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.