Tuesday, January28, 2020
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Marine Weather and Tides
Naval Academy 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 7:14AMSunset 5:23PM Tuesday January 28, 2020 10:43 AM EST (15:43 UTC) Moonrise 9:35AMMoonset 9:03PM Illumination 13% Phase: Waxing Crescent; Moon at 4 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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ANZ532 Chesapeake Bay From Sandy Point To North Beach- 637 Am Est Tue Jan 28 2020
.small craft advisory in effect until 6 pm est this evening...
Today..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Tonight..NW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..NE winds 5 kt. Waves less than 1 ft.
Thu night..NE winds around 5 kt. Waves 1 ft or less.
Fri..E winds around 5 kt. Waves flat. A chance of rain through the night.
Sat..W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
ANZ500 637 Am Est Tue Jan 28 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Weak disturbances will pass over the area through tonight. High pressure will build over the northern great lakes during the middle of the week as a cold front drops south from new england and low pressure passes well to the south near georgia.


7 Day Forecast for Marine Location Near Naval Academy, MD
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location: 38.99, -76.47     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 281310 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 810 AM EST Tue Jan 28 2020

SYNOPSIS. A pair of weak disturbances will cross the region in northwest flow through Wednesday morning. High pressure will build over the northern Great Lakes during the middle of the week as a cold front drops south from New England and low pressure passes well to the south near Georgia. A larger area of low pressure may approach from the Southeast U.S. Friday night into Saturday.

NEAR TERM /THROUGH TONIGHT/. A weak shortwave aloft has progressed off to our southeast overnight. A stubborn low-mid level cloud deck has held strong, even within the zone of subsidence behind the shortwave. With the clouds still in place and a light westerly wind, temperatures have stayed warmer than originally forecast. Have bumped up the low temperatures, as well as the sky cover forecast.

Despite model guidance indicating that there will be ample breaks of sunshine today, current thinking is that the cloud deck in place now will hold strong through the day. Solid overcast is expected west of the Blue Ridge, with only a few breaks to the east of the Blue Ridge. Feel relatively confident in this solution given that the same guidance had clearing skies overnight, while a solid cloud deck is still in place. With the strongest subsidence passing further south through the day, if anything, the synoptic scale pattern would favor an uptick in clouds. Temperatures won't climb much from where they are now with overcast skies in place, with highs in the low-mid 40s.

A shortwave embedded in northwesterly flow will pass off to our northeast overnight tonight. This should maintain the clouds cover initially, but the cloud deck may begin to break up toward morning as the shortwave progresses further to the east and weak subsidence moves overhead in the wake of the disturbance. Lows tonight will be in the 20s to low 30s.

SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/. The flow pattern across the eastern CONUS will remain devoid of any high amplitude disturbances over the next couple days. The flow pattern will be rather convoluted, with several weak shortwaves progressing from west to east. On Wednesday, we'll find ourselves between a shortwave departing off the Northeast Coast and another shortwave over the Mississippi Valley. We may finally get a break from the clouds in the zone of weak subsidence between these two features, but wouldn't be shocked if the clouds hold on given what occurred tonight. For now will maintain the forecast of mostly sunny, but may eventually need to introduce more clouds. Highs on Wednesday will be in the upper 30s and low 40s.

The aforementioned shortwave will approach from the west Wednesday Night and eventually pass overhead by Thursday afternoon. We will see an uptick in cloud cover Wednesday Night in advance of the shortwave. During the morning hours on Thursday, a few rain or snow showers can't be ruled out over southwestern portions of the forecast area. However, most of the area should remain dry. Don't expect much, if any accumulation for the areas that do see snow shower activity. Any precipitation should wind down Thursday afternoon as the shortwave progresses off to the east and subsidence aloft moves in.

LONG TERM /FRIDAY THROUGH MONDAY/. A Gulf of Mexico/Southeast U.S. low development is shown by global models Fri-Fri night with models indicating both nrn and srn streams remaining separate and not phasing until system reaches Atlantic Canada Sunday. During the past 24 hrs, the Euro has shown the least amount of variability indicating a weak system remaining just offshore with some precip skirting southern MD. The GFS, on the other hand, has shown the most variability from its previous run and it shows a track just inland from the coast and a deeper system resulting in widespread significant precipitation to parts of the area. Given lack of cold air in place/strong surface high to the north and unfavorable teleconnections pattern, this does not appear to be a favorable setup for heavy snow for our area at this time, although can't completely rule out some light wintry precipitation just yet especially in our higher elevation areas like Appalachian Mountains where it is typically cold enough to snow anyway this time of the year.

After another trof passage early on Sun and a chance of some light precip, longwave ridge pattern builds from the west leading to a big warmup for early next week.

AVIATION /07Z TUESDAY THROUGH SATURDAY/. There's a low-end chance that MVFR ceilings could move into MRB this morning. Otherwise VFR and precipitation-free conditions are expected at the terminals over the next several days. Winds today will be out of the northwest, with gusts up to 20 kt possible.

No sig weather expected Fri- Sat.

MARINE. Anticipate widespread/frequent gusts in excess of 20 knots through this morning in the wake of a departing shortwave. Winds may see a brief uptick over all marine zones right after daybreak today before the wind field diminishes this afternoon.

A second weak disturbance will cross over the waters tonight. Although the attendant wind field will be weaker, more of a northerly channeling component to the low-level flow could result in gusts in excess of 20 knots over the wider waters of the Chesapeake Bay.

Sub-SCA conditions are expected Wednesday through Friday night.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until noon EST today for ANZ531-532-539- 540-542. Small Craft Advisory until noon EST today for ANZ533-534-537- 541-543.

SYNOPSIS . LFR NEAR TERM . KJP SHORT TERM . KJP LONG TERM . LFR AVIATION . LFR/KJP MARINE . ADS/KJP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 1 mi55 min 41°F 1013.5 hPa
CPVM2 4 mi55 min 41°F
TPLM2 - Thomas Point, MD 7 mi43 min WNW 11 G 14 40°F 40°F1014.9 hPa (+1.5)29°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 16 mi55 min 40°F 1013.9 hPa
FSNM2 16 mi67 min 40°F 1013.4 hPa
BSLM2 - Chesapeake Bay, MD 19 mi133 min NW 5.1 1013 hPa
BLTM2 - 8574680 - Baltimore, MD 20 mi61 min 41°F 42°F1013.5 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi61 min 40°F 41°F1013.9 hPa
WASD2 - 8594900 - Washington, DC 30 mi55 min 42°F 40°F1014.7 hPa
CA2 - 8571892 - Cambridge, MD 36 mi61 min 41°F 41°F1013.5 hPa
SLIM2 - 8577330 - Solomons Island, MD 46 mi55 min 42°F 42°F1013.9 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD1 mi1.8 hrsWNW 510.00 miOvercast40°F28°F65%1013.9 hPa
Bay Bridge Field, MD7 mi58 minNW 1110.00 miOvercast41°F30°F66%1014.2 hPa
Baltimore, Baltimore-Washington International Airport, MD17 mi49 minWNW 610.00 miMostly Cloudy42°F28°F60%1013.7 hPa
Fort Meade / Tipton, MD17 mi55 minNW 810.00 miOvercast41°F32°F70%1014.9 hPa
Baltimore, Inner Harbor, MD21 mi49 minno data mi42°F28°F58%1014 hPa
Baltimore / Martin, MD24 mi1.8 hrsWNW 810.00 miOvercast41°F32°F70%1013.9 hPa
Camp Springs / Andrews Air Force Base, MD24 mi47 minNW 1410.00 miA Few Clouds42°F28°F57%1014.7 hPa
College Park Airport, MD24 mi55 minWNW 8 G 1810.00 miPartly Cloudy42°F24°F51%1014.2 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Tide / Current Tables for Annapolis (US Naval Academy), Severn 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 Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Tue -- 01:32 AM EST     -0.97 knots Max Ebb
Tue -- 05:01 AM EST     0.00 knots Slack
Tue -- 07:15 AM EST     Sunrise
Tue -- 07:54 AM EST     0.69 knots Max Flood
Tue -- 09:34 AM EST     Moonrise
Tue -- 11:00 AM EST     -0.00 knots Slack
Tue -- 01:43 PM EST     -0.55 knots Max Ebb
Tue -- 04:24 PM EST     0.00 knots Slack
Tue -- 05:21 PM EST     Sunset
Tue -- 07:42 PM EST     0.77 knots Max Flood
Tue -- 09:02 PM EST     Moonset
Tue -- 10:48 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.9-0.9-0.8-0.4-00.40.60.70.60.30-0.3-0.5-0.5-0.4-0.10.20.50.70.80.60.3-0.1

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 (10,2,3,4)
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Ground Weather Radar Station Dover AFB, DE
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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 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.