Marine Weather and Tides
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 6:58AM||Sunset 4:50PM||Thursday November 23, 2017 9:40 AM EST (14:40 UTC)||Moonrise 10:58AM||Moonset 9:14PM||Illumination 24%|
EDIT (on/off)  Help
|ANZ536 Tidal Potomac From Indian Head To Cobb Island- 836 Am Est Thu Nov 23 2017 |
Rest of today..W winds 5 kt. Waves less than 1 ft.
Tonight..SW winds around 5 kt. Waves 1 ft.
Fri..S winds around 5 kt. Waves 1 ft.
Fri night..S winds 5 kt. Waves less than 1 ft.
Sat..SW winds 5 kt. Waves less than 1 ft.
Sat night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Sun..NW winds 10 to 15 kt...diminishing to around 5 kt after midnight. Waves 1 ft.
Mon..S winds around 5 kt. Waves 1 ft.
|ANZ500 836 Am Est Thu Nov 23 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain over the waters through Friday night. A cold front will approach early Saturday before crossing Saturday night. High pressure will return for Sunday and Monday. A small craft advisory will likely be issued for Saturday night and Sunday.
7 Day Forecast for Marine Location Near Colonial Beach, VAHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 231430|
area forecast discussion
national weather service baltimore md washington dc
930 am est Thu nov 23 2017
High pressure will build over the area through Friday. Another
cold front will approach overnight Friday into Saturday before
passing through Saturday night. High pressure returns for Sunday
and Monday before moving offshore Tuesday.
Near term through tonight
Temperatures are starting to rebound under sunny skies following
a night of cold advection and light winds leading to chilly
temperatures. Shenandoah airport dropped to 16; new market and
petersburg both fell to 17. Everywhere fell to or below
freezing except downtown baltimore and coastal saint mary's
9 am temperatures ranged from 24 at shenandoah and petersburg to
39 at pax river. Winds have diminished and the pesky low clouds
in the hagerstown-frederick corridor are finally breaking. High
clouds remain east of a fredericksburg to annapolis line but are
High pressure will remain over the area all day today, leading
to light and variable winds and highs in the 40s. The sunny
sky will be peppered with some mid-level clouds this afternoon,
especially closer to the mason-dixon line, as a weak upper level
disturbance comes through the dry high pressure airmass
What few clouds there are will dissipate in the evening, leaving
generally clear skies. However, dewpoints should come up a few
degrees, so despite calm winds and decoupling, lows probably end
up a few degrees warmer than this morning. Will lean on the
cool side of guidance given what happened this morning.
Short term Friday through Saturday night
Friday and Friday night will have seasonable fair weather under
the continued influence of high pressure, with very light
Saturday will start out with partly sunny skies, but quickly
become overcast as cold front moves through the region,
bringing chance of rain showers, with diminishing chances the
further east as deep westerly winds will promote downsloping
and associated drying. Most likely scenario brings scattered
showers shenandoah valley and points west, with sprinkles at
higher elevations along the blue ridge, and mid-deck along and
east of interstate 95. Cold air advection with strong winds
behind the front for Saturday night, with snow showers
developing in favored upslope regions.|
Long term Sunday through Wednesday
High pressure will build overhead Sunday through
Monday... Bringing dry and seasonably chilly conditions. The high
will move offshore Tuesday and a southwest flow around the
departing high will usher in milder conditions... And it will
A cold front will approach the area Tuesday night and it may
pass through Wednesday or Thursday. Confidence in how far south
the front makes it is low at this time due to divergence in the
long range guidance. Leaned toward the superblend for
temperature forecasts during this time... Which keeps temps near
or above climo. This makes sense this far out since there will
be an anomalous subtropical ridge over the southeastern
conus... And this would favor the front being slower and weaker.
Aviation 14z Thursday through Monday
Vfr for all terminals through 36 hours. Gusty winds develop
Saturday night behind cold front.
Vfr conditions are expected Sunday through Tuesday as high
pressure controls the weather pattern.
Winds have decreased on the bay and the SCA was cancelled early.
Light winds should continue through Saturday. Small craft is
expected to return Saturday night and continue through Sunday.
High pressure will build overhead Sunday through Monday. A small
craft advisory may be needed for portions of the waters Sunday
ahead of the building high.
Lwx watches warnings advisories
near term... Je
short term... Lee
long term... Bjl
aviation... Lee bjl
marine... Je lee bjl
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|NCDV2||6 mi||40 min||N 4.1 G 6||37°F||49°F||1022.2 hPa (+0.9)|
|PPTM2 - 8578240 - Piney Point, MD||24 mi||40 min||N 13 G 17|
|SLIM2 - 8577330 - Solomons Island, MD||27 mi||40 min||NNW 8 G 14||38°F||52°F||1022.3 hPa (+1.1)|
|LWTV2 - 8635750 - Lewisetta, VA||32 mi||40 min||N 8.9 G 14||38°F||50°F||1022.5 hPa (+0.8)|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||32 mi||40 min||N 15 G 19||37°F||1023.1 hPa (+1.2)|
|44062 - Gooses Reef, MD||36 mi||30 min||NNW 9.7 G 14||38°F||1023.2 hPa|
|44042 - Potomac, MD||36 mi||30 min||NNW 12 G 16||39°F||1021.8 hPa|
|BSLM2 - Chesapeake Bay, MD||39 mi||70 min||Calm||28°F||1023 hPa||27°F|
|WASD2 - 8594900 - Washington, DC||43 mi||40 min||NW 5.1 G 7||35°F||47°F||1023.2 hPa (+0.7)|
|BISM2 - 8571421 - Bishops Head, MD||49 mi||40 min||N 6 G 9.9||37°F||46°F||1022.6 hPa (+1.0)|
Wind History for Piney Point, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|St Marys County Airport, MD||22 mi||54 min||NW 5||10.00 mi||Fair||36°F||26°F||70%||1023 hPa|
Wind History from 2W6 (wind in knots)
|1 day ago||SW|
|2 days ago||W||W|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Colonial Beach |
Click for Map
Thu -- 05:17 AM EST 1.36 feet High Tide
Thu -- 06:57 AM EST Sunrise
Thu -- 10:57 AM EST Moonrise
Thu -- 11:31 AM EST 0.03 feet Low Tide
Thu -- 04:50 PM EST Sunset
Thu -- 05:42 PM EST 1.59 feet High Tide
Thu -- 09:14 PM EST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Broomes Island |
Click for MapFlood direction 290° true
Ebb direction 110° true
Thu -- 01:16 AM EST 0.00 knots Slack
Thu -- 03:38 AM EST 0.25 knots Max Flood
Thu -- 06:47 AM EST -0.00 knots Slack
Thu -- 06:56 AM EST Sunrise
Thu -- 09:20 AM EST -0.24 knots Max Ebb
Thu -- 10:56 AM EST Moonrise
Thu -- 11:46 AM EST 0.00 knots Slack
Thu -- 03:12 PM EST 0.41 knots Max Flood
Thu -- 04:48 PM EST Sunset
Thu -- 06:45 PM EST -0.00 knots Slack
Thu -- 09:11 PM EST Moonset
Thu -- 10:14 PM EST -0.54 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Mid-Atlantic EDIT
Wind Forecast for Baltimore, MD/Washington (9,2,3,4)(on/off)  Help
Ad by Google
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.