Thursday, January23, 2020
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Marine Weather and Tides
Baltimore Highlands, 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 7:19AMSunset 5:17PM Thursday January 23, 2020 8:17 PM EST (01:17 UTC) Moonrise 6:31AMMoonset 4:08PM Illumination 1% Phase: Waning Crescent; Moon at 28 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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ANZ538 Patapsco River Including Baltimore Harbor- 657 Pm Est Thu Jan 23 2020
Tonight..NE winds around 5 kt. Waves flat.
Fri..E winds 5 to 10 kt. Waves 1 ft.
Fri night..E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain. Vsby 1 to 3 nm.
Sat..SE winds 10 to 15 kt...becoming W 5 to 10 kt in the afternoon. Waves 1 to 2 ft. Showers.
Sat night..W winds 5 to 10 kt. Waves 1 ft.
Sun..W winds 10 kt with gusts to 20 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 kt. Waves less than 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 Baltimore Highlands, MD
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location: 39.26, -76.6     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 231950 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 250 PM EST Thu Jan 23 2020

SYNOPSIS. High pressure will continue to move offshore through tonight. 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 TONIGHT/. Mostly cloudy but dry conditions continue through the remainder of the afternoon and tonight. Surface analysis shows high pressure slowly moving offshore as the upper level ridge shifts east. Clouds associated with a weak shortwave moving up along the trough axis will continue through tonight. Daytime temperatures are ranging in the upper 30s to low 40s and will dip down to near freezing across the CWA. Winds remain light and variable into tomorrow morning.

As low pressure approaches the region from the southwest, lower portions of the Potomac Highlands could see some patchy freezing fog/drizzle during the pre-dawn hours tomorrow. With overnight temperatures in this portion of the CWA being just below freezing, it may result in some patchy slick spots on untreated surfaces. However, confidence is too low to issue any headlines at this time due to low-level dry air in place. Elsewhere, conditions will remain dry overnight.

SHORT TERM /FRIDAY 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 WEDNESDAY/. 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 /19Z THURSDAY 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.

TIDES/COASTAL FLOODING. An onshore flow will increase late Friday into Saturday as low pressure passes through the waters. The onshore flow will cause elevated water levels and minor flooding is possible near times of high tide, especially Friday night and Saturday. An offshore flow will develop behind the departing low later Saturday and Saturday night, causing water levels to decrease.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 1 mi48 min 37°F 39°F1027.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 5 mi48 min 37°F 1028.5 hPa
FSNM2 5 mi60 min 38°F 1027.7 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 19 mi48 min 1028.5 hPa
APAM2 - 8575512 - Annapolis, MD 20 mi48 min 35°F 1027.8 hPa
CPVM2 21 mi48 min 37°F
TPLM2 - Thomas Point, MD 26 mi78 min Calm G 1 38°F 39°F1029.2 hPa (+0.3)29°F
BSLM2 - Chesapeake Bay, MD 34 mi108 min Calm 1027 hPa
WASD2 - 8594900 - Washington, DC 35 mi48 min 41°F 41°F1028.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 46 mi48 min 1028.8 hPa

Wind History for Baltimore, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Last 24hrCalmCalmW3W4CalmCalmCalmCalmCalmW3CalmCalmCalmSE4CalmCalmE45CalmE4E6E3CalmE4
1 day agoNW4NW3NW4NW5NW5NW4CalmCalmCalmCalmW3W3W3CalmS4Calm3SW5NW3CalmNW3S3CalmCalm
2 days ago4W3NW4NW4NW3CalmN3NW3NW3NW3NW4W5NW6NW9N7N6
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NW8NW10N7NW9NW7NW3NW3NW4

Tide / Current Tables for Middle Branch, Baltimore Harbor, Maryland
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Middle Branch
Click for Map
Thu -- 12:53 AM EST     -0.07 feet Low Tide
Thu -- 05:22 AM EST     0.51 feet High Tide
Thu -- 06:31 AM EST     Moonrise
Thu -- 07:20 AM EST     Sunrise
Thu -- 11:36 AM EST     -0.42 feet Low Tide
Thu -- 04:08 PM EST     Moonset
Thu -- 05:16 PM EST     Sunset
Thu -- 06:33 PM EST     1.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.100.20.40.50.50.30.1-0.1-0.3-0.4-0.4-0.3-00.30.711.11.110.80.60.3

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Thu -- 01:52 AM EST     0.00 knots Slack
Thu -- 04:10 AM EST     0.46 knots Max Flood
Thu -- 06:29 AM EST     Moonrise
Thu -- 06:37 AM EST     -0.00 knots Slack
Thu -- 07:19 AM EST     Sunrise
Thu -- 09:35 AM EST     -0.63 knots Max Ebb
Thu -- 12:13 PM EST     0.00 knots Slack
Thu -- 04:01 PM EST     1.21 knots Max Flood
Thu -- 04:07 PM EST     Moonset
Thu -- 05:15 PM EST     Sunset
Thu -- 07:32 PM EST     -0.00 knots Slack
Thu -- 10:51 PM EST     -1.09 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.300.30.50.40.2-0.1-0.4-0.6-0.6-0.4-0.10.30.81.11.21.10.80.3-0.2-0.7-1-1.1

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 (20,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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.