Wednesday, December11, 2019
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Marine Weather and Tides
Brooklyn Park, MD

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:14AMSunset 4:45PM Wednesday December 11, 2019 11:32 AM EST (16:32 UTC) Moonrise 4:33PMMoonset 6:28AM Illumination 100% Phase: Full Moon; Moon at 15 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- 937 Am Est Wed Dec 11 2019
.small craft advisory in effect until 6 pm est this evening...
Rest of today..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NW winds 5 to 10 kt. Waves 1 ft.
Thu..E winds 5 kt. Waves less than 1 ft.
Thu night..E winds around 5 kt. Waves flat.
Fri..NE winds 5 kt. Waves flat. Rain likely.
Fri night..NE winds 5 kt. Waves less than 1 ft. Rain.
Sat..W winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night.
Sun..NW winds 10 to 15 kt. Waves 1 ft.
ANZ500 937 Am Est Wed Dec 11 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build across the region today through Thursday. Low pressure system developing over the northern gulf of mexico will move northeastward toward the region Friday into Saturday. Small craft advisories may be needed Saturday.


7 Day Forecast for Marine Location Near Brooklyn Park CDP, MD
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location: 39.21, -76.58     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 111439 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 939 AM EST Wed Dec 11 2019

SYNOPSIS. Canadian high pressure will build across the region today through Thursday. A low pressure system will then develop in the Gulf of Mexico and push northward across the eastern United States Friday and Saturday, followed by another low pressure system that will approach the region Monday into Tuesday.

NEAR TERM /THROUGH THURSDAY/. The radar is now clear across the entire area, with the back edge of the cloud cover nearly out of the area as well. Any snow from this morning will quickly melt as mostly sunny skies are expected today due to Canadian high pressure pushing towards the area from the northwest. Highs today will be quite chilly, only reaching the upper 30s to low 40s. With gusty winds also present behind the front, wind chills will struggle to get above freezing for much of the area as well.

High pressure will continue to build across the region tonight into Thursday. The air mass is chilly, but not excessively or unusually cold for this time of year, with readings perhaps approaching 10 degrees below normal . a range which is quite normal this time of year. Lows tonight may reach the teens in the cold spots, so not even the coldest it has been so far this year. Highs on Thursday should be a little cooler (mid to upper 30s), with strong high pressure (~1040mb) set up to the northeast, which will continue to funnel cooler air into the region.

SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/. The Canadian high pressure will slide east off the coast Thursday night as low pressure develops along the Gulf Coast, then heads north. A wedge will remain, however, so cold air damming looks likely, especially Friday morning. Warm advection precip looks likely to overspread southwestern areas by mid- morning Friday, with the rest of the region likely seeing at least a bit of precip by day's end. The early arrival presents problems given the cold air mass in place, so freezing rain is a significant risk along the I-64 and I-81 corridors that we forecast for, stretching from Charlottesville to Staunton and perhaps as far north as Martinsburg. Further north and east, it appears more likely that temps will have a chance to rise above freezing before precip arrives, resulting in mostly or all plain rain. That all said, most precip Friday looks light, with the more significant rain moving in Friday night after temperatures are solidly above freezing (if only barely) across our entire area. Below freezing lows Thursday night will lead to highs in the 40s east of the mountains Friday, but 30s near I-81, with temps staying fairly steady Friday night with the rain.

LONG TERM /SATURDAY THROUGH TUESDAY/. Low pressure near the Delmarva Peninsula will lift northward into New England Saturday. Expect rain showers during the day. As an associated front makes its way to the East Coast by Saturday night, rain showers will taper to become more isolated. Some upslope rain or snow showers will develop in the Potomac Highlands in relation to the upper level low that is providing support to the departing surface low.

Upslope snow showers could linger in the Potomac Highlands on Sunday with a gusty northwest wind. Elsewhere, colder and drier air will filter into the central and eastern zones in part to high pressure.

By Sunday night into Monday, a developing warm front to our southwest could bring us a chance for some light snow or light rain. As the warm front lifts northward Monday night, this wintry mix of snow and rain should become plain rain Tuesday ahead of an approaching cold front and its affiliated surface low pressure system. Milder air will be short-lived Tuesday before a cold front brings a rush of colder air into the area late Tuesday and Tuesday night. Upslope light snow and a chance of snow showers to the east could evolve with the rush of cold air Tuesday night.

High pressure will build in across the region on Wednesday. Expect below average temperatures to develop and continue.

AVIATION /14Z WEDNESDAY THROUGH SUNDAY/. VFR conditions expected through Thursday night. Gusty northwest winds at times today should relax later tonight. A period of freezing rain is possible at CHO early Friday, then up towards MRB later in the morning-midday, but otherwise, mainly rain is expected Friday and Friday night. Cigs and vsby likely to drop to IFR at times by Friday night with the rain.

MVFR conditions possible with rain showers Saturday. VFR conditions Saturday night through Sunday night. A few snow showers could venture across CHO and MRB terminals Sunday night, but shouldn't have any big impacts on the terminals. Winds light and variable Saturday becoming west 5 to 10 knots Saturday night. Winds increasing west-northwest 10 to 15 knots gusts 20 knots Sunday and Sunday night.

MARINE. SCA continuing at times through this morning, and a secondary boundary may reinvigorate winds tonight for a time. High pressure then should let winds relax to sub-SCA by Thursday afternoon. Light winds then should prevail through Friday night.

Small craft advisory conditions possible Sunday into Sunday evening as high pressure over the Great Lakes interacts with low pressure over New England.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until midnight EST tonight for ANZ531>533- 539>541. Small Craft Advisory until 6 PM EST this evening for ANZ530- 535-536-538-542. Small Craft Advisory until noon EST Thursday for ANZ534-537- 543.

SYNOPSIS . CJL NEAR TERM . CJL SHORT TERM . RCM LONG TERM . KLW AVIATION . RCM/KLW/CJL MARINE . RCM/KLW/CJL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 3 mi44 min WNW 15 G 17 36°F 1028.1 hPa
BLTM2 - 8574680 - Baltimore, MD 4 mi44 min NNW 7 G 13 37°F 46°F1027.9 hPa
APAM2 - 8575512 - Annapolis, MD 17 mi44 min 37°F 1027.8 hPa
44063 - Annapolis 18 mi32 min NW 9.7 G 12 37°F 46°F1028.8 hPa (+0.8)
CPVM2 18 mi44 min 38°F
TCBM2 - 8573364 - Tolchester Beach, MD 18 mi44 min WNW 12 G 16 37°F 46°F1028.2 hPa
TPLM2 - Thomas Point, MD 23 mi32 min W 15 G 17 36°F 45°F1029 hPa (+0.6)21°F
BSLM2 - Chesapeake Bay, MD 30 mi182 min NW 4.1 34°F 1027 hPa27°F
WASD2 - 8594900 - Washington, DC 33 mi44 min WNW 8.9 G 13 36°F 44°F1029.5 hPa
44062 - Gooses Reef, MD 46 mi74 min NW 16 G 18 37°F 1030.3 hPa
CHCM2 - 8573927 - Chesapeake City, MD 46 mi44 min WNW 8 G 11 37°F 43°F1027.7 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore, Inner Harbor, MD5 mi38 minno data mi38°F19°F46%1028.8 hPa
Baltimore, Baltimore-Washington International Airport, MD5 mi38 minWNW 1510.00 miA Few Clouds37°F21°F52%1027.9 hPa
Baltimore / Martin, MD12 mi38 minWNW 1210.00 miA Few Clouds37°F28°F70%1028.4 hPa
Fort Meade / Tipton, MD13 mi38 minWNW 910.00 miFair36°F23°F60%1029.1 hPa
Annapolis, United States Naval Academy, MD17 mi38 minNW 8 G 1710.00 miFair37°F21°F54%1028.5 hPa
Bay Bridge Field, MD21 mi37 minNW 1110.00 miFair39°F24°F56%1028.4 hPa
College Park Airport, MD24 mi56 minNNW 710.00 miFair36°F16°F44%1028.8 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Last 24hrW8W6W5W5W11W8NW8NW11
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2 days agoSE8SE8S8SE6SE7SE3CalmSE4CalmSE3SE64SE3CalmNE3E8CalmNW5NW3NW3CalmCalmSW4SW4

Tide / Current Tables for Hawkins Point, Patapsco 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
Wed -- 02:29 AM EST     0.00 knots Slack
Wed -- 04:45 AM EST     0.43 knots Max Flood
Wed -- 06:27 AM EST     Moonset
Wed -- 07:11 AM EST     -0.00 knots Slack
Wed -- 07:14 AM EST     Sunrise
Wed -- 10:07 AM EST     -0.58 knots Max Ebb
Wed -- 12:41 PM EST     0.00 knots Slack
Wed -- 04:32 PM EST     1.18 knots Max Flood
Wed -- 04:32 PM EST     Moonrise
Wed -- 04:43 PM EST     Sunset
Wed -- 08:04 PM EST     -0.00 knots Slack
Wed -- 11:25 PM EST     -1.07 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.5-0.20.20.40.40.30.1-0.2-0.5-0.6-0.5-0.30.10.60.91.11.20.90.50-0.5-0.8-1

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 (11,2,3,4)
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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 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.