Saturday, August8, 2020
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Marine Weather and Tides
Betterton, 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 6:10AMSunset 8:10PM Saturday August 8, 2020 1:55 AM EDT (05:55 UTC) Moonrise 10:00PMMoonset 9:50AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 141 Am Edt Sat Aug 8 2020
Overnight..E winds 5 kt. Waves less than 1 ft. A chance of showers with isolated tstms. Patchy fog. Vsby 1 to 3 nm.
Sat..E winds 5 kt. Waves flat.
Sat night..SE winds 5 kt. Waves flat.
Sun..S winds around 5 kt. Waves flat.
Sun night..S winds 5 kt. Waves flat.
Mon..S winds 5 to 10 kt. Waves 1 ft or less.
Mon night..S winds 5 to 10 kt. Waves 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Wed..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 141 Am Edt Sat Aug 8 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A stationary front will remain just south of the area through Saturday before dissipating. High pressure will then build over the region over the second half of the weekend.


7 Day Forecast for Marine Location Near Betterton, MD
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location: 39.37, -76.04     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 080347 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1147 PM EDT Fri Aug 7 2020

SYNOPSIS. A weak stationary front will linger across the northern Mid- Atlantic before washing out Saturday. On Sunday a weak cold front will move through the region. High pressure will build into the area Sunday behind the front, before progressing offshore early next week. A cold front will approach New England around the middle of next week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/.

Have cancelled the Flash Flood Watch for southern areas with the midnight package, as storms are both weakening in intensity while also slowly sagging southwards (although some areas in southern Sussex Delaware could still see a good soaking). Otherwise only update was to cut PoPs in the northern two thirds of the CWA based on current trends.

The next big concern tonight will be low stratus and fog development. Near calm surface winds and plentiful low level moisture combined with a saturated ground should yield areas of fog. The trough approaching from the west should create enough turbulence to prevent widespread dense fog, but cannot rule it out. Overnight lows will be mainly in the 60s to around 70.

SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/. For Saturday, a progressive upper trough centered near the coast early in the day will move east with time with weak shortwave ridging approaching by late day. This should mean an overall drier day but there will still be significant low clouds and some fog around to start the day. And because low level winds will be quite light and there is so much moisture around, this could take some time to mix out. The upshot is that the morning should be mostly cloudy before some sun develops in the afternoon. However diurnal heating along with the continuing abundant moisture around could lead to some isolated to scattered afternoon storms developing. This won't be a washout though so it should be rain-free most of the time and many areas won't even see anything. It will still be fairly humid with lows mostly in the low to mid 80s.

LONG TERM /MONDAY THROUGH FRIDAY/. Saturday night into Sunday the mid-level disturbance from Friday will be finally exiting New England with lower PWAT air moving across the region. As the wave exits, brief subsidence will take shape across the area as surface high pressure centers over the Ohio Valley. The GFS and ECMWF does have a weak upper level disturbance traversing the Canadian Maritimes, but the system appears to far north, with to much dry air overhead to produce anything in the way of precipitation. Temperatures Sunday will likely be in the upper 80s to around 90 degrees as the dry air mass will allow temperatures to over perform.

Monday temperatures will remain warm as mid-level heights rise across the region and PWATs remain around 1.40". Tuesday into Wednesday an upper level low will head east across central Canada with an upper level disturbance approaching from the west. Overall, guidance has slowed down a bit from this time yesterday, with delaying the return of rain chances until Tuesday. An upper level wave will approach the area from the west Wednesday afternoon with significant uncertainty on the track and strength of the wave. Either way, the chance of showers and thunderstorms returns to the region Tuesday and Wednesday.

Wednesday into Thursday a cold front will approach New England with models showing a wide spread here. The GFS and CMC are slightly more amplified and slower with the upper level low over the Hudson Bay while the ECMWF is less amplified and more progressive. The GFS stalls the front across central/ southern NY, while the ECMWF keeps the front stalled across northern NY. For us this means an enhanced chance of showers and thunderstorms Wednesday through Friday.

AVIATION /04Z SATURDAY THROUGH WEDNESDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Tonight . A mix of VFR and MVFR CIGs will likely give way to generally IFR conditions in fog/stratus later tonight into Saturday morning. Light NE winds becoming light and variable or calm. Moderate confidence.

Saturday-Saturday night . Mainly VFR, but areas of MVFR possible especially near MIV and ACY during the day Saturday. Slight chance of a rain shower but tstms not expected. Winds mainly light and variable. Moderate confidence.

Outlook . Sunday-Sunday night . VFR. Light and variable wind becoming SW at 5 to 10 kt, except near the coast where an afternoon sea breeze is likely. High confidence.

Monday . Mainly VFR with dry conditions. South winds 5 to 15 kts. High confidence.

Tuesday and Wednesday . A chance of showers and thunderstorms during the afternoon and evening hours. South to southwest winds 5 to 15 kt. Moderate confidence.

MARINE. Through tonight . Sub-SCA conditions expected. Seas 2 to 3 ft. A couple of wind shifts possible but easterly directions will be prevailing and speeds mainly 10 kt or less. Scattered tstms are possible for most of this period with locally higher winds and seas possible in any tstms.

Outlook . Saturday-Saturday night . Sub-SCA conditions expected. Seas 2 to 3 ft. Winds mainly NE at 5 to 10 kt becoming light and variable overnight.

Monday . Sub-advisory winds/seas expected.

Tuesday into Wednesday . Sub-advisory winds/seas expected with a slight chance of showers and storms.

Rip Currents . Light onshore flow Saturday through Sunday, along with 2-3 ft seas and a swell period of around 6-8 seconds will result in a low risk for the development of dangerous and lift threatening rip currents.

EQUIPMENT. The NOAA Weather Radio All-Hazards broadcast from Hibernia Park Pennsylvania (Station WNG-704) remains off the air.

The NOAA Weather Radio All-Hazards broadcast from Franklin Township New Jersey (Station KZZ-31 ) is off the air.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.

Synopsis . Haines Near Term . Carr/Fitzsimmons/MPS Short Term . Fitzsimmons Long Term . Haines Aviation . Carr/Fitzsimmons/Haines/MPS Marine . Fitzsimmons/Haines Equipment . WFO PHI


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 15 mi56 min ESE 4.1 G 5.1 70°F 83°F1019.8 hPa (+0.0)
CHCM2 - 8573927 - Chesapeake City, MD 16 mi56 min SSW 1 G 2.9 70°F 83°F1020.1 hPa (+0.4)
DELD1 - 8551762 - Delaware City, DE 28 mi56 min W 1 G 1.9 71°F 76°F1019.9 hPa (+0.7)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 28 mi56 min W 5.1 G 6 71°F 1019.6 hPa (+0.0)
FSNM2 28 mi74 min WSW 4.1 G 5.1 71°F 1019.5 hPa
RDYD1 - 8551910 - Reedy Point, DE 28 mi56 min 70°F 83°F1019.4 hPa (+0.6)
BLTM2 - 8574680 - Baltimore, MD 29 mi56 min NW 1.9 G 2.9 72°F 82°F1019.3 hPa (+0.0)
CPVM2 32 mi56 min 73°F 71°F
APAM2 - 8575512 - Annapolis, MD 35 mi56 min NNW 4.1 G 5.1 73°F 84°F1019.1 hPa (+0.0)
SJSN4 - 8537121 - Ship John Shoal, NJ 35 mi56 min 72°F 1020.2 hPa (-0.0)
TPLM2 - Thomas Point, MD 39 mi56 min NW 1.9 G 2.9 73°F 82°F1020.3 hPa (-0.4)72°F
MRCP1 - 8540433 - Marcus Hook, PA 45 mi56 min 72°F 80°F1019.6 hPa (+0.6)

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Phillips Army Air Field / Aberdeen, MD10 mi58 minN 010.00 miOvercast69°F68°F99%1019.9 hPa
Baltimore / Martin, MD20 mi4 hrsENE 410.00 miMostly Cloudy72°F71°F100%1021.7 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
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Last 24hrSE3E3S3CalmCalmCalmCalmSE4E3E3SE6E3SE7S5S7S7NE4NE6SE3E3CalmCalmCalmCalm
1 day agoCalmCalmN4CalmNW4N4E4NE4NE6E8E7NE8NE6E6E5SE8SE6SE7SE6SE3E4E5SE3E5
2 days agoCalmNW3W3CalmCalmCalmN4--N5CalmCalmCalmCalmE5E4S4CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Betterton, Maryland
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Betterton
Click for Map
Sat -- 12:59 AM EDT     2.19 feet High Tide
Sat -- 06:10 AM EDT     Sunrise
Sat -- 06:50 AM EDT     0.97 feet Low Tide
Sat -- 10:50 AM EDT     Moonset
Sat -- 01:01 PM EDT     2.34 feet High Tide
Sat -- 07:24 PM EDT     0.70 feet Low Tide
Sat -- 08:08 PM EDT     Sunset
Sat -- 10:59 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.12.22.11.81.51.2111.11.31.622.22.32.21.91.61.20.90.70.70.91.21.6

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Sat -- 01:20 AM EDT     -0.07 knots Slack
Sat -- 04:34 AM EDT     -1.87 knots Max Ebb
Sat -- 06:09 AM EDT     Sunrise
Sat -- 07:52 AM EDT     0.00 knots Slack
Sat -- 10:49 AM EDT     Moonset
Sat -- 11:14 AM EDT     2.06 knots Max Flood
Sat -- 02:08 PM EDT     -0.08 knots Slack
Sat -- 05:09 PM EDT     -1.82 knots Max Ebb
Sat -- 08:07 PM EDT     Sunset
Sat -- 08:44 PM EDT     0.01 knots Slack
Sat -- 10:58 PM EDT     Moonrise
Sat -- 11:38 PM EDT     1.81 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.50.8-1-1.6-1.8-1.8-1.6-10.41.21.821.91.50.5-1.2-1.6-1.8-1.7-1.4-0.90.61.31.7

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 Philadelphia/Mount Holly, PA (1,6,7,8)
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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.