Sunday, March29, 2020
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Marine Weather and Tides
Port Deposit, 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 6:51AMSunset 7:27PM Sunday March 29, 2020 9:20 PM EDT (01:20 UTC) Moonrise 8:47AMMoonset 11:35PM Illumination 34% Phase: Waxing Crescent; Moon at 6 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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ANZ530 Chesapeake Bay North Of Pooles Island- 737 Pm Edt Sun Mar 29 2020
Tonight..W winds 5 kt. Waves less than 1 ft. A slight chance of showers this evening.
Mon..W winds 5 to 10 kt with gusts to 20 kt... Increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft.
Mon night..NW winds 5 to 10 kt. Waves 1 ft.
Tue..N winds 5 to 10 kt. Waves 1 ft.
Tue night..E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
Fri..NE winds 5 to 10 kt. Waves 1 ft.
ANZ500 737 Pm Edt Sun Mar 29 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A warm front will try to lift northward today before a cold front moves in from the west by tonight. High pressure will briefly build in for Monday before low pressure passes to the south Tuesday night into Wednesday. A small craft advisory may be needed for portions of the waters Monday, while looking likely Tuesday night and Wednesday.


7 Day Forecast for Marine Location Near Port Deposit, MD
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location: 39.6, -76.11     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 300114 AAA AFDLWX

Area Forecast Discussion . UPDATED National Weather Service Baltimore MD/Washington DC 914 PM EDT Sun Mar 29 2020

SYNOPSIS. Weak surface ridge will build in overnight. A surface trof will move across the area Monday afternoon. Low pressure tracks to our south Tuesday night into Wednesday morning, bringing more rain chances. High pressure returns for the end of the week.

NEAR TERM /THROUGH MONDAY/.

Dryline like feature moved past the I-81 corridor earlier today where temperatures reached 88F at CHO and dewpoints fell into the 20s at Staunton, but dryline like feature has stalled as nighttime microphysics RGB and split window difference products clearly depict a moisture discontinuity from western Washington County arcing southeastward through Winchester, Warrenton, and City of Fredericksburg. A wedge of low clouds has been surging southwestward from northeast MD and now reaches central MD. Short-term guidance is having lots of problems handling this wedge of low clouds. GLAMP seems to be doing the best so far and it shows low clouds reaching as far south as DC and southern MD. Look for this trend to persist overnight given dryline feature has stalled until daybreak arrives and better mixing commences.

Breezy to windy conditions with wind gusts 30-40 mph highest in western areas. It will be cooler for some in the southwest, but warmer in the northeast. It will be very dry and breezy for fire weather concerns, fortunately, most people had enough wetting rains Fri night and Sat to prevent fuels from drying out. The only exception was along the I-64 corridor where not enough wetting rains fell. An SPS for elevated fire wx conditions may be needed Monday.

SHORT TERM /MONDAY NIGHT THROUGH TUESDAY NIGHT/. A deep cyclone will be passing along the US-Canadian border Monday. There will be enough of a pressure gradient and cold advection to keep the atmosphere fairly well mixed. But with ample sunshine temperatures should be able to reach the 60s to near 70s.

Upper-level shortwave energy will be ejecting out of the southern Plains into the southeastern U.S. on Tuesday. Attendant surface low pressure will be maturing over the southeast throughout the day as it tracks towards the east. Latest global guidance keeps the surface low well to the south of our area. However, the northern shield of precipitation looks likely to have an impact across central VA. Best chance of precipitation looks to be Tuesday night into the early morning hours on Wednesday. Additionally, there will be cool enough air aloft for some potential wintry precipitation in the higher elevations of the central VA Blue Ridge and the lower Potomac Highlands of western VA. Of course, if the track of this low shifts even slightly north, could see more precipitation across those region, and perhaps even a farther northward extent of precip. Guidance is in pretty good agreement at this point though. Temperatures will only reach the mid 50s.

LONG TERM /WEDNESDAY THROUGH SUNDAY/. With flow out of the east to east-northeast on Wednesday, would expect low clouds/drizzle around after the low departs early in the day. Northerly flow will then quickly return around midday or so, as high pressure begins to build in out of the northwest, which should scour out the low clouds/drizzle by early afternoon. High temperatures will only reach the low to mid 50s Wednesday.

High pressure then slides by to the north Thursday and Friday, with dry and seasonable conditions expected, with highs in the low to mid 60s each day. Thursday will be slightly cooler though, as the high will be more directly overhead.

A cold front will then push through on Saturday, bringing the next chance for some rain. At this point, looks like this will be fairly light, as the surface low and upper-level energy pass by well to the north. Still plenty of time for that to change though, so will be something to keep track of.

AVIATION /01Z MONDAY THROUGH FRIDAY/. Low clouds with IFR cigs have surging southward past few hours from northeast to central MD. GLAMP shows cig restrictions developing as far south as DCA overnight. Thinking is more stratus rather than fog, but short-term guidance show both becoming a problem overnight.

Light NW flow early Tuesday will gradually turn to easterly by Tuesday evening, as low pressure tracks well to our south. This will still likely result in low clouds/drizzle Tuesday evening through early Wednesday morning, where sub-VFR conditions will continue likely through midday. CHO stands the best chance for visibility reducing rainfall, but still thinking heaviest precipitation stays farther south.

VFR returns Wednesday afternoon through Friday, as high pressure builds into the region from the northwest.

MARINE. Will issue SCA for tomorrow through Mon evening.

Northwest flow will commence tonight, and may be gusty with better momentum transfer on Monday. Have not issued Small Craft Advisories yet based on water temperatures.

Strengthening low pressure will pass by well to our south Tuesday night into Wednesday morning. This will lead to gusty easterly winds Tuesday night, gradually turning northerly and lightening up by Wednesday afternoon. Small Craft Advisories are likely starting late Tuesday night through Wednesday. The strongest winds over our forecast area will be in the central Chesapeake Bay. Can't rule out a period of Gale force gusts Wednesday morning either, so will have to monitor that as we get closer to the event.

SCA could extend into Thursday thanks to northerly channeling as the high pressure builds in from the northwest. But SCA conditions should end Thursday night and into Friday, as high pressure builds more directly overhead.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 17 mi51 min NE 2.9 G 7 52°F 51°F1010.4 hPa
DELD1 - 8551762 - Delaware City, DE 28 mi51 min NNE 9.9 G 12 51°F 55°F1010.2 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 28 mi57 min NNE 6 G 8.9 53°F 52°F1009.9 hPa
RDYD1 - 8551910 - Reedy Point, DE 29 mi51 min 52°F 51°F1009.6 hPa
BLTM2 - 8574680 - Baltimore, MD 34 mi51 min NE 6 G 8.9 55°F 53°F1009.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 34 mi51 min NNE 9.9 G 11 54°F 1009.7 hPa
FSNM2 34 mi63 min N 9.9 G 12 54°F 1009.8 hPa
MRCP1 - 8540433 - Marcus Hook, PA 40 mi51 min 52°F 52°F1010.3 hPa
CPVM2 44 mi51 min 52°F
SJSN4 - 8537121 - Ship John Shoal, NJ 44 mi51 min ESE 5.1 G 7 51°F 1010.3 hPa
APAM2 - 8575512 - Annapolis, MD 47 mi51 min 54°F 1008.7 hPa

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Phillips Army Air Field / Aberdeen, MD10 mi83 minNNE 52.75 miFog/Mist53°F52°F99%1010.1 hPa
Baltimore / Martin, MD24 mi23 minN 02.00 miFog/Mist54°F53°F100%1010.8 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
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Last 24hrNE3CalmN6CalmN5NE9NE5NE4E3N3NE3NE5E5E3CalmE8E6CalmW4SE5NE4NE5N5NE4
1 day agoW3CalmCalmCalmCalmCalmCalmE3SE4N3CalmNE7E7E6E8E9E8E5E7E6NE9NE7N6N4
2 days agoSW10S6SW5SW7CalmCalm--CalmCalmCalmCalmCalmCalmN5N6N7N4N8N4N5N7E3SW4SW3

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Sun -- 02:30 AM EDT     1.90 feet High Tide
Sun -- 06:52 AM EDT     Sunrise
Sun -- 09:11 AM EDT     0.27 feet Low Tide
Sun -- 09:47 AM EDT     Moonrise
Sun -- 02:47 PM EDT     2.70 feet High Tide
Sun -- 07:26 PM EDT     Sunset
Sun -- 10:51 PM EDT     0.59 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.51.91.91.71.410.60.40.30.40.81.42.12.62.72.52.21.81.41.10.80.60.6

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Sun -- 01:09 AM EDT     -0.08 knots Slack
Sun -- 04:37 AM EDT     -2.08 knots Max Ebb
Sun -- 06:51 AM EDT     Sunrise
Sun -- 07:52 AM EDT     0.08 knots Slack
Sun -- 09:46 AM EDT     Moonrise
Sun -- 11:40 AM EDT     2.06 knots Max Flood
Sun -- 02:34 PM EDT     -0.07 knots Slack
Sun -- 05:16 PM EDT     -1.54 knots Max Ebb
Sun -- 07:24 PM EDT     Sunset
Sun -- 07:44 PM EDT     0.02 knots Slack
Sun -- 11:42 PM EDT     1.64 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.50.6-1.3-1.8-2-2.1-1.8-1.20.51.21.7221.71-0.8-1.3-1.5-1.5-10.61.11.31.6

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (21,6,7,8)
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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.