Thursday, January21, 2021
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Marine Weather and Tides
Highland Beach, MD

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:18AMSunset 5:16PM Thursday January 21, 2021 11:09 PM EST (04:09 UTC) Moonrise 12:00PMMoonset 12:52AM Illumination 63% Phase: Waxing Gibbous; Moon at 9 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- 945 Pm Est Thu Jan 21 2021
.small craft advisory in effect from 6 am est Friday through late Friday night...
Rest of tonight..W winds 10 kt. Waves 1 ft.
Fri..W winds 10 kt with gusts to 25 kt. Waves 2 ft.
Fri night..NW winds 10 to 15 kt with gusts to 30 kt. Waves 2 to 3 ft.
Sat..NW winds 15 kt with gusts to 30 kt. Waves 3 ft.
Sat night..NW winds 10 to 15 kt with gusts to 30 kt. Waves 2 to 3 ft.
Sun..W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft.
Sun night..E winds around 5 kt. Waves 1 ft or less.
Mon..NE winds 5 to 10 kt. Waves 1 ft. A chance of rain and snow in the morning, then rain and snow.
Tue..N winds 10 kt. Waves 1 ft. A chance of rain and snow in the morning.
ANZ500 945 Pm Est Thu Jan 21 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the waters late tonight, with another reinforcing cold front pushing through the region on Friday. High pressure over the midwest will build eastward through the weekend. Low pressure may impact the region early next week. Small craft advisories will likely be needed for portions of the waters through the weekend. A gale warning may be required for portions of the waters Saturday.


7 Day Forecast for Marine Location Near Highland Beach, MD
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location: 38.93, -76.45     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 220146 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 846 PM EST Thu Jan 21 2021

SYNOPSIS. A weak cold front will cross the region late tonight, with a stronger cold front sweeping through the area Friday as high pressure over the Midwest builds eastward through the weekend. Low pressure may impact the area early next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. High pressure resides off the east coast this evening with low pressure situated north of the Great Lakes. Extending south from said low is a cold front which is dropping into the Ohio Valley, with a secondary front stretched westward across the Upper Midwest. The aforementioned front will cross the area overnight. West southwest winds we are observing this evening will turn predominately out of the west overnight as a result, with dry conditions persisting. Lows tonight will bottom out in the middle 20s to lower 30s with a slight uptick in cloud cover thanks to the frontal passage.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/. Canadian high pressure will build into the Upper Midwest on Friday, as a reinforcing cold front crosses the Mid Atlantic region. Westerly winds will turn more out of the west northwest Friday afternoon as the front crosses. With the help of a downslope wind early, temperatures will end the work week slightly above normal once again in the 40s to lower 50s. In the Alleghenies, temperatures will remain in the 20s and 30s. The gradient will tighten on Friday, with winds gusting 20 to 25mph during the afternoon, up to 35 mph across the ridges.

Behind the front, much colder air will advect into the region with a gusty northwest flow. This will allow for upslope snow showers to regenerate across the Allegheny Front late Friday afternoon and Friday night, with minor accumulations expected. A northwest breeze will persist Friday night in the wake of the front, as temperatures fall into the teens and 20s, wind chills by Saturday morning will dip into the teens area wide, with below zero wind chills in the Alleghenies.

A blustery and cold day is on tap Saturday with gusty northwest winds and temperatures remaining in the teens across the higher elevations, with 30s to near 40 degrees much elsewhere. Despite the cold conditions, skies will favor mostly sunny with any upslope snow showers winding down early Saturday morning. The high to our west will build overhead Saturday night, allowing for the northwest winds to abate. Mostly clear skies and the light winds will set the stage for perhaps the coldest night of the winter so far. Lows by sunrise Sunday morning will be in the teens to lower 20s across the CWA.

LONG TERM /SUNDAY THROUGH THURSDAY/. Upper level ridging over the Mid Atlantic will slide offshore throughout the course of Sunday as surface high pressure to our southeast slides further offshore. This will allow a low pressure system to pass nearby for Monday. Confidence in the exact track/details remains uncertain at this time. However, the pattern appears more indicative of a mixed p-type event, especially early on Monday, given a positive EPO, negative NAO and negative PNA. Will continue to monitor forecast trends over the next few days.

As mentioned previously, the timing of the system is to be determined. With that being said, Tuesday appears to be more so a transition day as low pressure continues to exit the region. Canadian high pressure returns for Wednesday and may continue into Thursday. However some guidance members indicate a second low pressure system which could impact the region late next week.

AVIATION /02Z FRIDAY THROUGH TUESDAY/. VFR conditions at the terminals through tonight as a dry and weak cold front crosses the area, turning west southwest breezes predominately out of the west northwest. A reinforcing cold front will move across the terminals during the day on Friday, delivering gusty winds out of the northwest through Friday night while dry conditions and VFR prevails.

Strongest winds will impact the terminal on Saturday, gusty upwards of 30 knots at times. Skies will remain clear with no threat of precipitation, thus VFR can be expected Saturday and Saturday night.

VFR conditions are likely for Sunday with high pressure in control. Clouds are likely to increase late Sunday as an area of low pressure approaches for Monday. CIG/VSBY restrictions are likely to ensue by early Monday morning as the low may bring a period of wintry precip across the terminals. Confidence in the exact timing/details remains low at this time.

MARINE. Light winds predominate presently, but the potential exists for SCA gusts over the lower Chesapeake Bay waters later this evening and overnight as a weak cold front crosses. Thus, SCA remains in effect.

SCA conditions look poised to return to all waters Friday as a reinforcing cold front moves through the area. Initial westerly component to the wind may help keep temperatures up slightly the first half of the day Friday, which again may prevent full mixing to occur over the waters at least until later in the afternoon. Better likelihood of SCA gusts late Friday afternoon and Friday night as the front crosses and cold air advection kicks in. Northwest winds will gust 20 to 30 knots during this time.

Strong gradient will preside over the waters Saturday as high pressure builds eastward from the Midwest. High end Small Craft Advisory conditions likely, with the potential for Gale gusts as well. Have held off on issuing any headlines for Saturday yet to getter a better feel on the Gale potential with this evenings model guidance. The high will build overhead Saturday evening/night, allowing for lighter winds but SCA gusts may still linger with the cold airmass in place.

High pressure will build over the water Sunday. An SCA may be needed in the morning ahead of the high for north to northwest winds. Low pressure may impact the waters early next week, and SCA conditions are possible.

TIDES/COASTAL FLOODING. Water levels running a bit higher than forecast thanks to the calm winds overnight turning out of the south southwest this morning. This has allowed for those higher anomalies further down the Chesapeake Bay to lift northward. That being said, minor tidal flooding is not expected, with only Action stage being achieved at our more sensitive sites. A cold front will cross the waters overnight as winds turn out of the west, with a reinforcing cold front pushing through on Friday, ushering in stronger northwest winds and falling water levels through the first half of the weekend.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 6 AM Friday to 6 AM EST Saturday for ANZ531>533-537-539>541. Small Craft Advisory from 10 AM Friday to 6 AM EST Saturday for ANZ530-535-536-538-542. Small Craft Advisory until 6 AM EST Saturday for ANZ534-543.

SYNOPSIS . BKF NEAR TERM . BKF/RCM SHORT TERM . BKF LONG TERM . MSS AVIATION . MSS/BKF/RCM MARINE . MSS/BKF TIDES/COASTAL FLOODING . BKF


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TPLM2 - Thomas Point, MD 2 mi69 min W 9.9 G 9.9 46°F 41°F1006.5 hPa (+1.3)20°F
APAM2 - 8575512 - Annapolis, MD 4 mi75 min NW 2.9 G 2.9 37°F 41°F1005.2 hPa
CPVM2 6 mi75 min 45°F 23°F
BSLM2 - Chesapeake Bay, MD 17 mi99 min Calm 33°F 1005 hPa30°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 20 mi75 min W 19 G 24 46°F 1005.1 hPa
FSNM2 20 mi75 min W 23 G 29 47°F 1004.6 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 22 mi93 min NW 9.9 G 12 44°F 39°F
BLTM2 - 8574680 - Baltimore, MD 24 mi75 min WNW 5.1 G 8 46°F 42°F1005 hPa
44062 - Gooses Reef, MD 26 mi63 min W 9.7 G 12 44°F 42°F982.7 hPa
WASD2 - 8594900 - Washington, DC 31 mi75 min Calm G 1 39°F 40°F1006.4 hPa
CA2 - 8571892 - Cambridge, MD 32 mi75 min SW 5.1 G 7 42°F 41°F1005.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 37 mi141 min WSW 12 G 15 1005.8 hPa
SLIM2 - 8577330 - Solomons Island, MD 42 mi75 min WSW 6 G 7 43°F 42°F1005.7 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, MD4 mi75 minN 010.00 miFair37°F30°F76%1005.8 hPa
Bay Bridge Field, MD7 mi74 minWNW 410.00 miFair43°F27°F53%1005.8 hPa
Fort Meade / Tipton, MD20 mi74 minWNW 610.00 miFair34°F27°F75%1006.4 hPa
Baltimore, Baltimore-Washington International Airport, MD21 mi75 minWSW 510.00 miFair40°F21°F47%1005.4 hPa
Easton / Newman Field, MD22 mi79 minN 010.00 miFair37°F30°F75%1006.8 hPa
Camp Springs / Andrews Air Force Base, MD23 mi2.2 hrsW 310.00 miFair37°F28°F70%1005.1 hPa

Link to 5 minute data for KNAK

Wind History from NAK (wind in knots)
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Last 24hrCalmCalmCalmCalmS3S5S7S8S6S11
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Tide / Current Tables for Bay Ridge, Maryland
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Bay Ridge
Click for Map
Thu -- 12:51 AM EST     Moonset
Thu -- 04:34 AM EST     -0.16 feet Low Tide
Thu -- 07:20 AM EST     Sunrise
Thu -- 11:13 AM EST     0.63 feet High Tide
Thu -- 11:59 AM EST     Moonrise
Thu -- 05:14 PM EST     Sunset
Thu -- 05:52 PM EST     0.10 feet Low Tide
Thu -- 10:51 PM EST     0.47 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.1-0.1-0.1-0.2-0.10.10.30.40.60.60.60.50.40.30.20.10.10.10.20.30.40.5

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Thu -- 12:51 AM EST     Moonset
Thu -- 01:33 AM EST     -0.00 knots Slack
Thu -- 05:00 AM EST     -0.68 knots Max Ebb
Thu -- 07:19 AM EST     Sunrise
Thu -- 08:05 AM EST     0.00 knots Slack
Thu -- 11:42 AM EST     0.89 knots Max Flood
Thu -- 11:58 AM EST     Moonrise
Thu -- 03:21 PM EST     -0.00 knots Slack
Thu -- 05:14 PM EST     Sunset
Thu -- 06:22 PM EST     -0.63 knots Max Ebb
Thu -- 09:50 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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0.30.1-0.1-0.4-0.6-0.7-0.6-0.4-00.30.60.80.90.70.50.1-0.2-0.5-0.6-0.6-0.4-0.200.2

Weather Map
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wmap_A
GEOS Local Image of    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.
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Ground Weather Radar Station




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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.