Thursday, January23, 2020
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Marine Weather and Tides
Port Tobacco Village, MD

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
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.

Sunrise 7:20AMSunset 5:21PM Thursday January 23, 2020 9:38 PM EST (02:38 UTC) Moonrise 6:31AMMoonset 4:12PM Illumination 1% Phase: Waning Crescent; 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- 657 Pm Est Thu Jan 23 2020
Tonight..N winds around 5 kt. Waves 1 ft.
Fri..E winds 5 to 10 kt. Waves 1 ft.
Fri night..SE winds 10 to 15 kt. Waves 1 to 2 ft. Rain. Vsby 1 to 3 nm.
Sat..S winds 5 kt...becoming W in the afternoon. Waves 1 ft. A chance of showers.
Sat night..W winds 5 kt. Waves less than 1 ft.
Sun..W winds 5 to 10 kt. Waves 1 ft.
Sun night..W winds 5 to 10 kt. Waves 1 ft.
Mon..NW winds 5 to 10 kt. Waves 1 ft.
Tue..NW winds 5 to 10 kt. Waves 1 ft.
ANZ500 657 Pm Est Thu Jan 23 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain overhead, then slowly drift offshore by Friday. A low pressure system will approach on Saturday. Small craft advisories may be needed Friday night through Sunday.


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 240128 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 828 PM EST Thu Jan 23 2020

SYNOPSIS. Low pressure will move toward the region Friday before passing through Friday night into Saturday. The low will move northeastward into New England during the second half of the weekend. High pressure returns Sunday and lingers into early next week.

NEAR TERM /THROUGH FRIDAY/.

Overrunning precip will start spreading across the central Shenandoah valley and the central Appalachians primarily after 12Z Fri. There is a non-zero (roughly 20-40%) chance that the precip at the northern edge may fall in the form of freezing rain where sfc temps may still be below freezing. At this time, will have a mention of ra/fzra across western Allegany, western Mineral, but no headlines given low confidence and low impact. Rain should slowly overspread across western VA during the daylight hours and across northeast MD Fri night.

SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/. A large H5 low will continue to move through the Midwest, tracking northeastward towards NY state. Precipitation will begin to spread across the region, beginning mid AM Friday for southwestern portions of the CWA, before slowly progressing northeast into the metro areas Friday night. With strong dynamical forcing in place, a secondary low will develop late Friday night enhancing rainfall rates overnight. Expecting higher QPF amounts of near 2 inches mainly along the Blue Ridge due given stronger dynamical lift. Elsewhere, total QPF amounts will be near 1 inch. Rain will begin to tapper off from southwest to northeast Saturday AM before ending for the metros by late Saturday afternoon. Partial clearing ensues into Saturday night as the low exits the region. Strong westerly winds and colder air aloft will induce upslope snow along the western Allegheny Front into Sunday.

LONG TERM /SUNDAY THROUGH THURSDAY/. By Sunday low pressure, both surface and aloft, will be migrating toward New England. The forecast area will be experiencing northwest flow with scattered upslope snow showers Sunday and Sunday night . possibly extending into Monday. Winds will be on the gusty side as well, especially during the daytime hours when cold advection will have a better chance to mix to the surface.

Tuesday into Wednesday will be the lull when a ridge axis passes across the eastern CONUS. Thereafter, another transitory upper level closed low and surface reflection will approach at the end of the forecast period. Its too soon to get caught up in the details for this system.

AVIATION /01Z FRIDAY THROUGH TUESDAY/. VFR conditions will continue through Friday morning as high pressure moves offshore with light and variable winds. The one exception will be around KCHO where MVFR cigs are possible as early as late tonight. As low pressure develops from the SW, reduced VSBYs/CIGs are anticipated as rain develops from a CHO-DCA- MTN line from mid Friday AM into late Friday afternoon. Winds will be increasing Friday night and remain breezy into Saturday night, gusts up to 20 knots. Conditions will improve Saturday afternoon into the night.

VFR should prevail across the terminals Sunday and Monday. Winds will be from the west/northwest, with 20-25 kt gusts Sunday resulting in the bigger operational impact.

MARINE. Winds will remain light through Friday as high pressure slowly moves offshore. Periods of SCA conditions possible Friday night into Saturday night with low pressure impacting our area.

Small Craft Advisory possible Sunday (and maybe into Monday) in cold northwest flow permitting 20+ kt gusts to mix to the water's surface.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . None.

SYNOPSIS . LFR NEAR TERM . LFR SHORT TERM . MSS LONG TERM . DHOF AVIATION . LFR/DHOF MARINE . LFR/DHOF


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 9 mi57 min 37°F 42°F1026.7 hPa
WASD2 - 8594900 - Washington, DC 30 mi51 min 40°F 41°F1028.1 hPa
BSLM2 - Chesapeake Bay, MD 32 mi129 min Calm 1027 hPa
SLIM2 - 8577330 - Solomons Island, MD 36 mi51 min 37°F 42°F1027.1 hPa
PPTM2 - 8578240 - Piney Point, MD 37 mi111 min E 2.9 G 2.9
LWTV2 - 8635750 - Lewisetta, VA 46 mi57 min 40°F 38°F1027.2 hPa
TPLM2 - Thomas Point, MD 48 mi39 min N 4.1 G 4.1 38°F 39°F1028.6 hPa (+0.0)33°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 mi1.7 hrsN 010.00 miMostly Cloudy35°F28°F78%1028.5 hPa
Stafford, Stafford Regional Airport, VA19 mi44 minN 010.00 miOvercast34°F26°F75%1029.1 hPa
Fort Belvoir, VA20 mi1.7 hrsN 010.00 miFair33°F23°F67%1028.5 hPa
Fredericksburg, Shannon Airport, VA22 mi44 minN 010.00 miOvercast37°F29°F75%1027.4 hPa

Link to 5 minute data for KNYG

Wind History from NYG (wind in knots)
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Last 24hr--W6W7W6W7W7NW6W6W7--W7W4CalmW4CalmCalmCalmSE3--CalmW4CalmCalmCalm
1 day agoN6N8N10N10N11N8N5N4N3NW4W6W43CalmE3S4SE6SE3----NE3NW4CalmW6
2 days agoNW5NW5N9N7N8N7NW6NW7NW8N10N10N12N13N12
G16
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G18
6NW9N11N8N5N8N5

Tide / Current Tables for Goose Bay, Port Tobacco River, 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 Maryland Point Light, Potomac River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (21,6,7,8)
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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 numerous 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.