Saturday, July4, 2020
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Marine Weather and Tides
Townsend, DE

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 5:39AMSunset 8:34PM Saturday July 4, 2020 1:45 AM EDT (05:45 UTC) Moonrise 7:25PMMoonset 3:56AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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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ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 101 Am Edt Sat Jul 4 2020
Rest of tonight..NE winds 5 to 10 kt. Waves 2 ft or less. A slight chance of tstms.
Sat..NE winds 5 to 10 kt, becoming se in the afternoon. Waves 2 ft or less.
Sat night..SE winds 5 to 10 kt, becoming sw late. Waves 2 ft or less.
Sun..S winds around 5 kt, increasing to 5 to 10 kt late. Waves 2 ft or less.
Sun night..SW winds 5 to 10 kt. Waves 2 ft or less.
Mon..SW winds 5 to 10 kt, becoming S in the afternoon. Waves 2 ft or less.
Mon night..S winds 5 to 10 kt. Waves 2 ft or less.
Tue..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Waves 2 ft or less.
Tue night..S winds 10 to 15 kt. Waves 2 ft or less.
Wed..S winds 10 to 15 kt. Waves 2 ft or less.
Wed night..S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves 2 ft or less. Winds and waves higher in and near tstms.
ANZ400 101 Am Edt Sat Jul 4 2020
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A backdoor cold front will move across the area this evening and overnight, then push to our south through Saturday. Another backdoor front may move into the area Sunday into Monday, before lifting back northward into Tuesday. A very warm and humid week is expected next week as a southerly flow develops, although there is the potential for a coastal low along the east coast late next week.


7 Day Forecast for Marine Location Near Townsend, DE
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location: 39.4, -75.6     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 040410 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1210 AM EDT Sat Jul 4 2020

SYNOPSIS. A backdoor cold front will move across the area this evening and overnight, then push to our south through Saturday. Another backdoor front may move into the area Sunday into Monday, before lifting back northward into Tuesday. A very warm and humid week is expected next week as a southerly flow develops, although there is the potential for a coastal low along the east coast late next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/. The last of the convection is moving through extreme southern New Jersey and eastern portions of Delaware. All should be over in the next couple of hours.

Otherwise, drying out overnight but remaining warm and muggy. Skies becoming mostly cloudy as a stratus deck rotates in from northeast to southwest.

Lows tonight will only drop into the 70s for metro Philadelphia and Delmarva. Other areas will fall into the mid/upper 60s. Winds will become N to NE overnight. Patchy fog will develop, mainly across areas where rain fell.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM SUNDAY/. Following the weak front that crosses the area Friday night, drier and slightly cooler air will be across the area Saturday. This will probably be the most comfortable day of the next several with highs expected to remain in the 80s and dew points mostly in the 60s, so overall conditions will not be that oppressive. A minor vort max will drop south from nrn PA/srn NY during the afternoon. It's possible that a couple sct showers could develop, so we'll just keep the (mostly) slight chc pops in the afternoon fcst for now.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/. The long term period is forecast to be quite warm, with building humidity each day. Each day through the extended is forecast to be above normal. There is also a chance of rain each day, but it will not be a washout by any means.

On Sunday, the warm up beings again as the first backdoor front will be well to our south, before another approaches from the north. There is not much moisture forecast, nor any strong short wave/vorticity impulses expected, so Sunday is expected to be precipitation free.

By Monday, a second backdoor front approaches from the north, while moisture increases, along with a couple of short waves/vorticity impulses that may clip our northern areas. This could lead to a few scattered or isolated showers and thunderstorms during the afternoon.

By Tuesday, the backdoor front will move well to our north, and steady return flow will develop for Tuesday through at least Wednesday. This will keep warm temperatures across the area, but also lead to increasing humidity. Multiple short waves/vorticity impulses will move across the area for Tuesday- Wednesday, and will combine with an increase in moisture and lead to higher chances of showers and thunderstorms.

Questions return for the end of the week however. The ECMWF and Canadian show a coastal low moving northward along the east coast, while the GFS dissipates the low across the southeast states, but does push moisture across the Mid-Atlantic states. There will continue to be an enhanced chance for rain for Thursday through Friday.

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

Through tonight . Mainly VFR through around 06z. Development of an MVFR stratus deck around 2000 feet is expected in most areas after that time. Winds generally light and variable or light from the northeast. Moderate confidence.

Saturday . MVFR early then slowly diminishing CIGS with VFR in most areas (except coastal areas) by noon. NE to E winds 5 to 10 knots mostly. Medium confid.

Outlook .

Saturday night-Sunday night . Generally VFR expected.

Monday-Wednesday . Mostly VFR. A chance of showers and thunderstorms each afternoon and evening which may temporarily lead to lower conditions.

MARINE. Winds and seas will remain below SCA conditions tonight and Saturday. Any lingering thunderstorms will end. Winds will turn onshore tonight and remain E or NE into Saturday.

OUTLOOK .

Saturday night-Wednesday . Conditions expected to remain below advisory levels through the period, although winds could gust around 20 knots at times. There is a chance of showers and thunderstorms during the late afternoon and evening Monday- Wednesday.

Rip currents .

Today . Low Tomorrow . Low to moderate.

TIDES/COASTAL FLOODING. Astronomical high tide levels will continue to rise as there will be a full moon this weekend. The evening high tides are over a foot higher than those in the morning.

With high tides over, water levels continue to recede. The Coastal Flood Advisory expired at midnight.

Continued northeasterly and easterly flow could result in additional coastal flooding with the high tide cycles Saturday and Sunday evening in the same areas, though confidence is low at this time, so will hold off on extending the advisory for now.

For tidal portions of the Delaware River, at this point it looks like water levels will stay below advisory criteria, but will monitor the levels in the Delaware Bay closely this evening to see if it needs to be expanded.

Tidal flooding is not expected on the upper eastern shore of Chesapeake Bay.

EQUIPMENT. The NOAA Weather Radio All Hazards broadcast from Hibernia Park, PA (WNG704) remains off the air until further notice due to damage to the antenna during the June 3 Derecho.

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

Synopsis . Robertson Near Term . MPS/O'Brien/O'Hara Short Term . O'Hara Long Term . Robertson Aviation . O'Brien/O'Hara/Robertson Marine . MPS/O'Hara/Robertson Tides/Coastal Flooding . Equipment .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RDYD1 - 8551910 - Reedy Point, DE 11 mi51 min 77°F 82°F1010.6 hPa
DELD1 - 8551762 - Delaware City, DE 13 mi51 min ENE 4.1 G 5.1 77°F 78°F1011.1 hPa
CHCM2 - 8573927 - Chesapeake City, MD 14 mi51 min ENE 1.9 G 4.1 79°F 84°F1011.3 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 14 mi51 min 77°F 1011.4 hPa
MRCP1 - 8540433 - Marcus Hook, PA 30 mi51 min 77°F 80°F1011.1 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 36 mi51 min Calm G 1.9 80°F 84°F1011.3 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 38 mi51 min ENE 18 G 20 1011.8 hPa
PHBP1 - 8545240 - Philadelphia, PA 44 mi51 min 76°F 80°F1011.1 hPa
CMAN4 - 8536110 - Cape May, NJ 45 mi51 min NE 2.9 G 12 76°F 74°F1011.4 hPa
BDSP1 49 mi51 min 75°F 1011.9 hPa

Wind History for Delaware City, DE
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Dover Air Force Base, DE19 mi50 minESE 410.00 miLight Rain75°F73°F94%1011.4 hPa
Wilmington, New Castle County Airport, DE19 mi54 minNE 410.00 miFair76°F66°F72%1011.3 hPa

Link to 5 minute data for KDOV

Wind History from DOV (wind in knots)
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Last 24hrW5W5W4W4NW5NW6NW8NW10NW8NW7N6NW4N8N9
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1 day agoW4CalmNW3CalmW3NW3N5NW8N11N8N7N8N9NW9NW10W9W10W9W7W8SW5SW7SW5W5
2 days agoS3S5S5W3NW4W6NW5CalmN6N6NE8E11SE9S12W4E4E11
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5SW8N3NW3CalmN3Calm

Tide / Current Tables for Taylors Bridge, Blackbird Creek, Delaware
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Taylors Bridge
Click for Map
Sat -- 12:37 AM EDT     3.63 feet High Tide
Sat -- 04:55 AM EDT     Moonset
Sat -- 05:41 AM EDT     Sunrise
Sat -- 06:50 AM EDT     0.02 feet Low Tide
Sat -- 01:07 PM EDT     3.00 feet High Tide
Sat -- 06:50 PM EDT     0.15 feet Low Tide
Sat -- 08:24 PM EDT     Moonrise
Sat -- 08:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.63.63.12.31.610.300.30.91.62.32.832.82.11.40.80.40.20.51.11.92.6

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Sat -- 12:26 AM EDT     -2.48 knots Max Ebb
Sat -- 04:25 AM EDT     0.02 knots Slack
Sat -- 04:56 AM EDT     Moonset
Sat -- 05:41 AM EDT     Sunrise
Sat -- 07:17 AM EDT     2.40 knots Max Flood
Sat -- 11:17 AM EDT     -0.01 knots Slack
Sat -- 01:17 PM EDT     -1.42 knots Max Ebb
Sat -- 04:18 PM EDT     0.05 knots Slack
Sat -- 07:08 PM EDT     1.91 knots Max Flood
Sat -- 08:25 PM EDT     Moonrise
Sat -- 08:33 PM EDT     Sunset
Sat -- 09:32 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.4-2.4-2.2-1.8-11.32.12.42.321.50.7-1.1-1.4-1.3-1.1-0.611.61.91.71.1-1-1.8

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.