Tuesday, January21, 2020
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Marine Weather and Tides
Brooklyn Park, 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 7:20AMSunset 5:15PM Tuesday January 21, 2020 12:23 AM EST (05:23 UTC) Moonrise 4:35AMMoonset 2:23PM Illumination 16% Phase: Waning Crescent; Moon at 26 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 Pm Est Mon Jan 20 2020
Rest of tonight..N winds 10 kt. Waves 1 ft.
Tue..NW winds 5 to 10 kt. Waves 1 ft.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 kt. Waves flat.
Wed night..N winds around 5 kt. Waves flat.
Thu..E winds around 5 kt. Waves flat.
Thu night..Light winds. Waves flat.
Fri..E winds 5 to 10 kt. Waves 1 ft or less. Rain likely through the night.
Sat..E winds 10 kt...becoming nw. Waves 1 ft. Rain likely through the day, then a chance of showers through the night.
ANZ500 937 Pm Est Mon Jan 20 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build eastward from the northern plains during the first half of the week, then move offshore during the second half of the week. A small craft advisory may be needed for portions of the waters Tuesday night.


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 210209 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 909 PM EST Mon Jan 20 2020

SYNOPSIS. A large area of high pressure will move from the northern Plains during the first half of the week, centered overhead by Wednesday. The high will move offshore during the second half of the week, then low pressure will approach from the central United States for Saturday.

NEAR TERM /THROUGH TUESDAY/. Winds have diminished significantly compared to the daylight hours, but there is still a little bit of a gradient. In spite of this, it looks like there is a chance that partial decoupling could occur. Will be lowering min temps to account for this, as skies are clear and dewpoints are in the single digits. A few single digit readings possible in some of the sheltered valley locations across western areas.

On Tuesday winds will gradually diminish through the morning hours and then become light in the afternoon under sunny skies. Temperatures will be a degree or two warmer than today (Monday).

SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/. Continued dry conditions as upper level ridging aloft will keep skies clear through this period. The center of the surface high will be on top of the region early Wednesday morning leading to another cold night Tues night with calm conditions and clear skies. Daytime highs on Wed will slightly moderate.

LONG TERM /THURSDAY THROUGH MONDAY/. Heights will be rising significantly Tue through the middle of the week leading to a gradual warm up. A sfc low pressure center is expected to get organized over the Southeast later in the week as trof digs across the central CONUS and evolves into a deep cutoff low. Precipitation is expected to overspread the area slowly from southwest to northeast late Fri and Fri night. Liquid amounts of close to an inch are possible with this event this upcoming weekend. Wintry precipitation is possible for the Appalachains starting Friday night and continuing into Saturday. Latest 12Z EPS winter probability guidance showing likely chances for greater than 3" in the western mountains Fri night into Saturday . and the EPS has continued an upward trend in higher probabilities of accum snow there. The low system deepens Sat night- Sun. Seasonably cool air along with mainly dry conditions will return for the last week of January.

AVIATION /02Z TUESDAY THROUGH SATURDAY/. VFR conditions expected through Friday. Northwest winds 10 kts or less tonight under clear skies and on Tues becoming more northerly less than 10 kts.

Next low pressure system will impact the area over the weekend with rain the most likely p-type at this time. Rain is expected to move in late Fri and continue through Sat with flight restrictions possible Fri night-Sat time frame.

MARINE. Gradient has relaxed a bit more than previously forecast. However, a pocket of 20-25 kt winds will be passing through at 2000-3000 ft above the water overnight. The challenge is, with cold air atop warmer water, will this mix down. Have peeled back a couple of zones from the Small Craft Advisory. However, with the window of opportunity from around 02/03Z through 07/08Z, do not want to cancel too much too quickly. Will be monitoring this closely.

Winds may reinvigorate Tuesday morning before high pressure suppresses winds Tuesday afternoon. Guidance still want to hold onto gusty winds Drum Point-Smith Point/Tangier Sound Tuesday night. Am slightly skeptical of this given trends tonight and an examination of time-heights. The high will be overhead by Wednesday, with light winds prevailing through Wednesday night.

Sub-SCA conditions expected Thursday into late Friday with high pressure in control. Winds will be strengthening from the East Fri night into the weekend with SCA conditions possible mainly over southern waters.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 1 PM EST Tuesday for ANZ532-533-537- 541-543. Small Craft Advisory until 1 AM EST Wednesday for ANZ534.

SYNOPSIS . SMZ NEAR TERM . HTS/SMZ SHORT TERM . SMZ LONG TERM . LFR AVIATION . SMZ/LFR MARINE . HTS/SMZ/LFR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSNM2 3 mi65 min 29°F 1030.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 3 mi53 min 29°F 1030.9 hPa
BLTM2 - 8574680 - Baltimore, MD 4 mi59 min 29°F 41°F1030.5 hPa
APAM2 - 8575512 - Annapolis, MD 17 mi53 min 29°F 1030 hPa
CPVM2 18 mi53 min 31°F
TCBM2 - 8573364 - Tolchester Beach, MD 18 mi59 min 29°F 39°F1031 hPa
TPLM2 - Thomas Point, MD 23 mi23 min NNW 15 G 16 29°F 40°F1031 hPa (+0.0)10°F
BSLM2 - Chesapeake Bay, MD 30 mi113 min N 1 1030 hPa
WASD2 - 8594900 - Washington, DC 33 mi53 min 30°F 42°F1031.1 hPa
CHCM2 - 8573927 - Chesapeake City, MD 46 mi59 min 26°F 39°F1030.7 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore, Inner Harbor, MD5 mi29 minno data mi28°F6°F39%1030.5 hPa
Baltimore, Baltimore-Washington International Airport, MD5 mi29 minNW 410.00 miFair24°F7°F48%1030.6 hPa
Baltimore / Martin, MD12 mi36 minWNW 310.00 miFair21°F14°F74%1031.5 hPa
Fort Meade / Tipton, MD13 mi35 minN 010.00 miFair21°F12°F68%1031.5 hPa
Annapolis, United States Naval Academy, MD17 mi29 minN 910.00 miFair29°F12°F51%1030.4 hPa
Bay Bridge Field, MD21 mi38 minN 910.00 miFair28°F8°F43%1030.5 hPa
College Park Airport, MD24 mi35 minN 510.00 miFair25°F6°F45%1030.5 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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N10N9N6CalmW34W3NW4NW4
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2 days agoNE6NE5NE3CalmCalmE4SE5SE3S6S4S9S5S4S5S4S36S6--SW9SW8
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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
Tue -- 12:06 AM EST     0.00 knots Slack
Tue -- 02:16 AM EST     0.37 knots Max Flood
Tue -- 04:32 AM EST     -0.00 knots Slack
Tue -- 04:33 AM EST     Moonrise
Tue -- 07:20 AM EST     Sunrise
Tue -- 07:43 AM EST     -0.66 knots Max Ebb
Tue -- 10:27 AM EST     0.00 knots Slack
Tue -- 02:19 PM EST     1.22 knots Max Flood
Tue -- 02:22 PM EST     Moonset
Tue -- 05:13 PM EST     Sunset
Tue -- 05:57 PM EST     -0.00 knots Slack
Tue -- 09:15 PM EST     -1.02 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-00.20.40.30.1-0.1-0.4-0.6-0.7-0.5-0.20.20.711.21.20.90.5-0-0.5-0.9-1-1-0.7

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 (0,6,7,8)
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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.