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 6:23AM||Sunset 7:54PM||Sunday August 20, 2017 12:17 AM EDT (04:17 UTC)||Moonrise 3:59AM||Moonset 6:16PM||Illumination 5%|
EDIT (on/off)  Help
|ANZ532 Chesapeake Bay From Sandy Point To North Beach- 1031 Pm Edt Sat Aug 19 2017 |
Rest of tonight..W winds 5 kt. Waves less than 1 ft. Scattered showers with isolated tstms late this evening, then a slight chance of showers.
Sun..NE winds 5 kt. Waves less than 1 ft.
Sun night..SE winds 5 kt. Waves flat.
Mon..SE winds 5 to 10 kt. Waves 1 ft or less.
Mon night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 10 kt. Waves 2 ft. A chance of showers and tstms.
Wed..N winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu..N winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
|ANZ500 1031 Pm Edt Sat Aug 19 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Weak high pressure will build over the waters through this afternoon. A weak reinforcing cold front will pass through the area this evening and high pressure will return for Sunday. The high will move offshore Monday and a stronger cold front will approach Tuesday before passing through Wednesday. High pressure will build overhead behind this boundary. Small craft advisories will likely be needed Tuesday into Wednesday.
7 Day Forecast for Marine Location Near Naval Academy, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 200125 aaa|
area forecast discussion... Updated
national weather service baltimore md washington dc
925 pm edt Sat aug 19 2017
Weak high pressure will build in today... But an upper-level disturbance
and reinforcing cold front will pass through the area this evening.
High pressure will build overhead late tonight through Sunday
before moving offshore Monday. High pressure will remain offshore
Tuesday and a stronger cold front will pass through Wednesday.
High pressure returns for the second half of the week.
Near term through Sunday
Scattered showers and isolated thunderstorms will continue for
the next couple of hours until upper level trof passes over the
area around midnight. Gust front well out ahead of the showers
with common gusts 25 to 30 mph behind it. Skies become clear
quickly after midnight.
Short term Sunday night through Monday night
High pressure will move off the coast by Monday morning. Southerly
flow will increase resulting in the return of warm and humid
conditions. Westerly flow aloft will lead to the potential upper
level disturbances to pass across the mid-atlantic region. A cu
field will likely develop by afternoon and showers and
thunderstorms are possible. At this time... Disorganized activity
is expected through the afternoon and early evening. Any
convection will likely wane Monday night resulting in mild and
Long term Tuesday through Saturday
A cold front is expected to move into the ohio valley Tuesday
afternoon. This will present a chance of thunderstorms across
teh northern part of our forecast area by mid late afternoon,
and across the entire region Tuesday night as the front moves
into pa. The chance should persist through at least midday
Ahead of the front east of the mountains highs Tuesday will
reach the 90 degree mark, with lows in the lower to mid 70s.
Wednesday highs should drop back into the 80s.
High pressure will decend out of the upper great lakes and
bring some very pleasant weather to the region for the second
half of the week. Lows Thursday and Friday night will drop|
into the 50s west of the mountains, and lower 60s east. Highs
Thursday through Saturday around 80.
Aviation 02z Sunday through Thursday
Vfr conditions are expected most of the time through Wednesday.
An isolated shower or thunderstorm is possible late this afternoon
and evening across the northern terminals... But most areas will be
dry. Patchy fog cannot be ruled out early Sunday morning.
Scattered thunderstorms are possible later Monday into Monday night
as a southerly flow allow for more atmospheric moisture to return.
A cold front is expected to move into pa Tuesday night... And
cross the bay midday Wednesday. Thunderstorms sub-vfr weather
will be possible during this time.VFR conditions to end the day
A reinforcing cold front will pass through the waters this evening.
A pop up shower cannot be ruled out but most areas will be dry.
High pressure will build overhead for Sunday before moving offshore
Monday. A return southerly flow will develop Monday and persist
through Tuesday night ahead of a cold front.
A cold front is expected to push through the waters by midday
Wednesday. Showers and thunderstorms will be possible beginning
late Tuesday afternoon. Wind gusts may reach SCA levels Tuesday
Tides coastal flooding
Waters may rise to minor levels at annapolis Monday.
Lwx watches warnings advisories
products... Hsk woody!
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|
|APAM2 - 8575512 - Annapolis, MD||1 mi||48 min||75°F||1014.2 hPa|
|44063 - Annapolis||2 mi||38 min||ENE 3.9 G 5.8|
|CPVM2||4 mi||48 min||76°F||68°F|
|TPLM2 - Thomas Point, MD||7 mi||78 min||NNW 11 G 12||78°F||80°F|
|44043 - Patapsco, MD||12 mi||38 min||NNW 3.9 G 5.8||75°F||1015.1 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||16 mi||48 min||W 5.1 G 5.1||73°F||1014.7 hPa|
|BSLM2 - Chesapeake Bay, MD||19 mi||108 min||NNW 1.9||69°F||1014 hPa||68°F|
|BLTM2 - 8574680 - Baltimore, MD||20 mi||48 min||N 1.9 G 4.1||73°F||84°F||1014.4 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||20 mi||48 min||E 1.9 G 2.9||73°F||83°F||1014.7 hPa|
|WASD2 - 8594900 - Washington, DC||30 mi||48 min||W 1 G 2.9||76°F||82°F||1014.6 hPa|
|44062 - Gooses Reef, MD||30 mi||38 min||NNW 19 G 31||76°F||1016.3 hPa|
|CA2 - 8571892 - Cambridge, MD||36 mi||48 min||77°F||83°F||1015.4 hPa|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||41 mi||48 min||SW 8 G 8.9||79°F||1015.2 hPa|
|44057 - Susquehanna, MD||43 mi||38 min||NW 5.8 G 7.8||73°F||1014.5 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||46 mi||48 min||SSW 5.1 G 6||79°F||82°F|
Wind History for Francis Scott Key Bridge NE Tower, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Annapolis, United States Naval Academy, MD||1 mi||24 min||W 3||10.00 mi||Fair||75°F||68°F||79%||1015.2 hPa|
|Bay Bridge Field, MD||7 mi||53 min||NNW 6||10.00 mi||Partly Cloudy||75°F||64°F||69%||1014.9 hPa|
|Fort Meade / Tipton, MD||17 mi||30 min||N 0||10.00 mi||Fair||66°F||64°F||94%||1016.3 hPa|
|Baltimore, Baltimore-Washington International Airport, MD||17 mi||24 min||N 0||10.00 mi||Partly Cloudy||70°F||66°F||87%||1015 hPa|
|Baltimore, Inner Harbor, MD||21 mi||24 min||no data||mi||73°F||66°F||79%||1015.3 hPa|
|Baltimore / Martin, MD||24 mi||21 min||SW 4||10.00 mi||Partly Cloudy||72°F||66°F||83%||1015.6 hPa|
|College Park Airport, MD||24 mi||30 min||N 0||10.00 mi||Fair||70°F||64°F||83%||1015.2 hPa|
|Camp Springs / Andrews Air Force Base, MD||24 mi||80 min||NW 4||10.00 mi||Thunderstorm Light Rain||73°F||64°F||76%||1015.7 hPa|
Wind History from BWI (wind in knots)
|1 day ago||S||S||Calm||Calm||Calm||S||SE||Calm||SW||S||S||SW||S||S||S|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NE||E||E||E||E||Calm||S|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Annapolis (US Naval Academy) |
Click for Map
Sun -- 04:47 AM EDT 1.87 feet High Tide
Sun -- 04:59 AM EDT Moonrise
Sun -- 06:24 AM EDT Sunrise
Sun -- 11:13 AM EDT 0.56 feet Low Tide
Sun -- 04:44 PM EDT 1.28 feet High Tide
Sun -- 07:16 PM EDT Moonset
Sun -- 07:53 PM EDT Sunset
Sun -- 10:49 PM EDT 0.25 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Sun -- 12:42 AM EDT 0.00 knots Slack
Sun -- 04:18 AM EDT 1.16 knots Max Flood
Sun -- 04:58 AM EDT Moonrise
Sun -- 06:23 AM EDT Sunrise
Sun -- 07:44 AM EDT -0.00 knots Slack
Sun -- 10:57 AM EDT -1.06 knots Max Ebb
Sun -- 02:24 PM EDT 0.00 knots Slack
Sun -- 05:04 PM EDT 0.68 knots Max Flood
Sun -- 07:15 PM EDT Moonset
Sun -- 07:50 PM EDT -0.00 knots Slack
Sun -- 07:53 PM EDT Sunset
Sun -- 10:52 PM EDT -0.80 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 (0,6,7,8)(on/off)  Help
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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.