Friday, December4, 2020
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Marine Weather and Tides
Kennedyville, 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 7:05AMSunset 4:40PM Friday December 4, 2020 5:59 PM EST (22:59 UTC) Moonrise 8:29PMMoonset 10:48AM Illumination 77% Phase: Waning Gibbous; Moon at 20 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- 344 Pm Est Fri Dec 4 2020
.gale warning in effect from 1 am est Saturday through Saturday afternoon...
.small craft advisory in effect from Saturday afternoon through late Saturday night...
Rest of this afternoon..S winds 5 kt. Waves less than 1 ft. Showers likely.
Tonight..W winds around 5 kt...becoming N after midnight, then increasing to 15 to 20 kt with gusts to 25 kt late. Waves 1 ft or less. Rain. Vsby 1 to 3 nm.
Sat..NW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. A chance of showers.
Sat night..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
Sun..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Sun night..NW winds 5 to 10 kt. Waves 1 ft.
Mon..NW winds 5 to 10 kt. Waves 1 ft.
Tue..NW winds 5 to 10 kt. Waves 1 ft.
ANZ500 344 Pm Est Fri Dec 4 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure is expected to strengthen as it passes near or just south of the waters tonight into Saturday. High pressure may briefly build toward the waters Sunday before low pressure develops offshore Monday. Small craft advisories may be required at times Sunday through Monday.


7 Day Forecast for Marine Location Near Kennedyville, MD
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location: 39.38, -75.97     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 042101 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 401 PM EST Fri Dec 4 2020

SYNOPSIS. Low pressure will strengthen across the Carolinas overnight while a weak disturbance moves across the Great Lakes before phasing with the southern low. The resultant system will bring widespread rain and windy conditions to the area into Saturday before the low lifts off to the north and east. A secondary surface low will form off the Carolina Coast Monday before moving well offshore into Tuesday. High pressure will then build across the eastern U.S. for the second half of the week.

NEAR TERM /THROUGH SATURDAY/. A surface low continues to deepen as it ejects from the Tennessee Valley to our south while a shortwave perturbation digs across the Great Lakes. Confidence has grown that these two features will phase just soon enough to keep the track of the developing coastal low too close to the coast for much of any wintry precipitation in our area. Heavy rain and wind will remain the impacts of interest for us this time around.

Rain will continue to build across the region overnight as the southern low moves into the Carolinas. Weak frontogenetic forcing has lead to a persistent rain band across the CWA this afternoon. Temperatures will drop a little overnight into the upper 30s to low 40s.

As the surface low approaches the Delaware Coast Saturday morning, cyclogenesis will really begin thanks to the added PVA of the Great Lakes shortwave trough. The resultant trough will take on a negative tilt, adding to a favorable environmental for storm intensification. The low will also be situated beneath the left jet exit and right jet entrance regions, both of which enhancing dynamic lift. In this case, the progression of the low is too quick with not enough cold air for us to see much frozen precipitation. Thus, an all rain event is forecast, outside of the highest terrain of the Poconos and Sussex County, New Jersey where up to an inch is possible as the storm pulls off to the north and east Saturday evening. The good news is the axis of heaviest rain continues to stay placed east over Delmarva and up the New Jersey Coast. In total, generally 1 and a half inches and less across southeastern Pennsylvania and up to 2 inches along the Coast.

The bulk of the rain looks to move out of the area from southwest to northeast in the early afternoon. A few snow showers across the north as the precipitation ends, but the next concern becomes the gusty winds. As the low deepens, the increasing pressure gradient will lead to strong northwest winds into the afternoon with gusts to 45 mph at times, especially along the coast. With the potential for a few gusts to 50 mph on the barrier islands, went ahead and issued a Wind Advisory in effect from 6 am to 6 pm.

A chilly night Saturday night as cold air spills into the region with lows in the upper 20s to 30s. Watch for any standing water to freeze, though the wind in the afternoon should help dry us out.

SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY/. The system from the near term part of the fcst continues to move away. Dry weather is expected but gusty winds and below normal temperatures will keep a December feel to the forecast picture. Lows Sat night will be upper 20s to low 30s most areas with wind chills mostly 5 to 10 degrees cooler. Highs Sunday will be in the 30s N/W and low 40s elsewhere.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/.

The upper trough across much of the East during the late weekend and into early next week will decrease in amplitude and slowly move east as the week goes on. Overall, we can expect dry weather across the area with a gradual moderation of temperatures. Readings Monday/Tuesday will be below normal with highs in the 40s across the CWA. Even Wednesday, temps will still be a little below normal, but then become above normal by the end of the week with some upper 40s and low 50s for most areas.

In terms of precipitation, a dry week is expected with high pressure prevailing across the region. One thing to watch will be the movement of low pressure across the SE/Carolinas later Mon and into Tue. It could spread some cloudiness to the S/E areas. Right now, it appears the we will remain precip-free across Delmarva and srn NJ, but if the low begins to track closer, some rains may affect these areas.

AVIATION /20Z FRIDAY THROUGH WEDNESDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Rest of this afternoon . VFR ceilings lowering to 4000-6000 feet with some mainly light rain across portions of the area. Some MVFR ceilings and/or MVFR visibility restrictions may develop toward early evening mostly at RDG, ABE to TTN. Southwesterly winds 10 knots or less. Low confidence on the timing and extent of any MVFR conditions.

Tonight . MVFR ceilings lowering to IFR by 06z. Visibility restrictions will occur due to rain, which will be moderate to heavy at times especially from the PHL metro area south and east after 04z. Light and variable to light northeast winds, becoming north to north-northwest 10-15 knots late. Low confidence on timing details.

Saturday . IFR/MVFR conditions improve to VFR by early afternoon as rain ends from southwest to northeast. Northwest winds 15-20 knots with gusts to 25-35 knots. Low confidence on timing details regarding improvements to VFR.

Outlook .

Saturday night . Fair weather with gusty winds expected.

Sunday thru Wednesday . Mostly Fair weather expected.

MARINE. Rest of today and tonight . SCA wind gusts out of the southwest likely through 6 PM. Winds will taper off a bit overnight and turn northerly. Seas from 2 to 4 feet.

Saturday and Saturday night . Gale force wind gusts to 40 knots from the north to northwest through the afternoon and into the overnight. A Gale Warning is in effect for the coastal waters from 6 am Saturday through 6 am Sunday and for the Delaware Bay from 6 am Saturday through 6 pm. Seas from 6 to 8 feet.

Outlook . Sunday/Sunday night . SCA Sun, then conditions diminishing later Sun. night. Fair weather.

Monday/Monday night . Mostly sub-SCA conditions. Fair.

Tuesday . Near SCA gusts and seas as a storm passes well S/E of the waters. Fair weather expected. We'll have to watch this period of the fcst in case the storm trends more towards our area.

Tue night thru Thu . Mostly sub-SCA. Fair weather.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Small Craft Advisory until 6 PM EST this evening for ANZ450>455. Gale Warning from 6 AM Saturday to 6 AM EST Sunday for ANZ450>455. Gale Warning from 6 AM to 6 PM EST Saturday for ANZ430-431.

Synopsis . Davis Near Term . Davis Short Term . O'Hara Long Term . O'Hara Aviation . Gorse/O'Hara Marine . Davis/O'Hara


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 13 mi59 min NNW 2.9 G 4.1 46°F 47°F1015.8 hPa (-1.6)
TCBM2 - 8573364 - Tolchester Beach, MD 19 mi71 min Calm G 2.9 50°F 48°F1015.5 hPa
RDYD1 - 8551910 - Reedy Point, DE 24 mi59 min 46°F 49°F1015.1 hPa (-1.9)
DELD1 - 8551762 - Delaware City, DE 25 mi59 min SSW 1 G 1.9 46°F 39°F1015.6 hPa (-1.8)
FSNM2 31 mi59 min N 2.9 G 4.1 48°F 1014.8 hPa (-1.3)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 32 mi59 min NE 1.9 G 1.9 48°F 1015.2 hPa (-2.3)
SJSN4 - 8537121 - Ship John Shoal, NJ 32 mi59 min 51°F 1016.2 hPa (-1.0)
BLTM2 - 8574680 - Baltimore, MD 33 mi59 min NNE 1 G 1.9 49°F 51°F1014.8 hPa (-2.1)
CPVM2 35 mi59 min 52°F 44°F
44063 - Annapolis 38 mi35 min 1.9 G 3.9 51°F 51°F1017.1 hPa
APAM2 - 8575512 - Annapolis, MD 38 mi59 min NNW 1 G 1 50°F 51°F1014.9 hPa (-1.1)
TPLM2 - Thomas Point, MD 41 mi59 min SE 8.9 G 8.9 53°F 51°F1015.9 hPa (-1.5)44°F
MRCP1 - 8540433 - Marcus Hook, PA 42 mi59 min 46°F 49°F1015.2 hPa (-0.7)

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Phillips Army Air Field / Aberdeen, MD12 mi2.1 hrsN 05.00 miLight Rain Fog/Mist45°F42°F93%1015.9 hPa
Baltimore / Martin, MD24 mi65 minN 010.00 miMostly Cloudy45°F44°F100%1016.3 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
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Last 24hrSW3S4CalmCalmCalmSW3SW6CalmCalmSW5CalmCalmCalmCalmCalmCalm--W5CalmCalm--Calm--Calm
1 day agoW4SW3W6W5W3W3W4W4W4W4CalmW4W3CalmS3SW5SW8SW7SW5S7S9S9SW4Calm
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Tide / Current Tables for Betterton, Maryland
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Betterton
Click for Map
Fri -- 06:31 AM EST     0.23 feet Low Tide
Fri -- 07:08 AM EST     Sunrise
Fri -- 10:49 AM EST     Moonset
Fri -- 11:28 AM EST     1.04 feet High Tide
Fri -- 04:40 PM EST     Sunset
Fri -- 04:54 PM EST     -0.07 feet Low Tide
Fri -- 08:29 PM EST     Moonrise
Fri -- 11:58 PM EST     2.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.81.51.10.70.40.30.20.40.60.9110.80.50.20-0.100.30.71.21.72

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Fri -- 12:51 AM EST     -0.05 knots Slack
Fri -- 03:11 AM EST     -1.34 knots Max Ebb
Fri -- 05:19 AM EST     0.03 knots Slack
Fri -- 07:07 AM EST     Sunrise
Fri -- 09:26 AM EST     1.62 knots Max Flood
Fri -- 10:48 AM EST     Moonset
Fri -- 11:27 AM EST     -0.02 knots Slack
Fri -- 03:09 PM EST     -2.22 knots Max Ebb
Fri -- 04:39 PM EST     Sunset
Fri -- 06:40 PM EST     0.07 knots Slack
Fri -- 08:28 PM EST     Moonrise
Fri -- 10:21 PM EST     2.12 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.2-0.4-1.1-1.3-1.2-0.60.91.21.41.61.61-1.1-1.8-2.1-2.2-2.1-1.8-1.10.71.41.82.12

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
Ground Weather Radar Station Dover AFB, DE
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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.