Wednesday, April1, 2020
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Marine Weather and Tides
Greensboro, 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 6:46AMSunset 7:29PM Wednesday April 1, 2020 4:23 AM EDT (08:23 UTC) Moonrise 11:06AMMoonset 1:29AM Illumination 58% Phase: First Quarter Moon; Moon at 8 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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ANZ539 Chester River To Queenstown Md- 405 Am Edt Wed Apr 1 2020
.small craft advisory in effect until noon edt today...
.small craft advisory in effect from Thursday morning through Thursday afternoon...
Rest of the overnight..NE winds 10 kt. Waves 2 ft. A chance of showers. Patchy fog.
Today..N winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft.
Tonight..NW winds 10 to 15 kt. Gusts up to 20 kt in the late evening and overnight. Waves 1 to 2 ft.
Thu..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft.
Thu night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Fri..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Fri night..N winds 5 to 10 kt. Waves 1 to 2 ft.
Sat..SE winds 5 kt. Waves less than 1 ft.
Sun..SW winds 5 kt. Waves less than 1 ft.
ANZ500 405 Am Edt Wed Apr 1 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will exit the carolina coastline tonight and move out to sea Wednesday while strengthening. High pressure will slowly build in from the midwest through the end of the week. Small craft advisories may be needed late Wednesday night through Friday.


7 Day Forecast for Marine Location Near Greensboro, MD
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location: 38.97, -75.82     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 010716 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 316 AM EDT Wed Apr 1 2020

SYNOPSIS. Low pressure off the Southeast U.S. coast will move northeast into the western Atlantic, then will meander southeast of Nantucket Island through Friday. Meanwhile, surface high pressure builds in from the west. Low pressure departs over the weekend as high pressure builds along the Eastern Seaboard. Low pressure approaches for the start of the new work week.

NEAR TERM /UNTIL 6 AM THIS MORNING/. An upper level trough axis will pivot across the area then shift offshore today as ridging very gradually starts to build over the Midwest. Meanwhile, an area of low pressure will shift further offshore of the mid-Atlantic today, developing into a powerful hurricane force low as it does so but taking its precipitation shield well away from us. The air aloft is quite cool with the upper trough overhead, so expect there will be a lot of diurnally driven cloudiness today, though should be some breaks of Sun also. Cannot rule out a spotty pop up shower, but with winds gradually shifting from northeasterly to northerly and northwesterly, the profiles will be drying out and expect it to be a dry day. Highs mainly in the low to mid 50s. Some wind gusts of 20 to 25 mph are possible especially to the east thanks to the offshore low, potentially a little stronger right at the coast. These winds should diminish later in the day.

SHORT TERM /6 AM THIS MORNING THROUGH 6 AM THURSDAY/. An uneventful night is expected. Skies will finally turn mostly clear overnight as low pressure moves further offshore and diurnally driven clouds dissipate early. With mainly clear skies and 850mb temperatures dipping to near -5C, it will be a chilly night. The pressure gradient will be at its weakest early in the night, but should start to restrengthen during the latter part of the night which will lead to a steady northwest breeze developing. This will preclude ideal radiational cooling, but most areas will still fall into the 30s for lows. Because of the warm winter, we are starting our frost/freeze program a little earlier than normal, with areas mainly south of I-78 starting as of today, April 1. Forecast lows leave open the possibility of some frost, but currently believe the winds should be sufficient to preclude its development.

LONG TERM /THURSDAY THROUGH TUESDAY/. For the late-week period, the area finds itself between surface high pressure building in from the west and low pressure several hundred miles east of Nantucket Island. The low will retrograde back towards the mainland late Thursday through Friday, and warp-around precip will rotate towards northern and coastal portions of New Jersey. Not expecting much in the way of QPF during this time, generally a few hundredths of an inch or so total. Temperatures will be near to maybe a couple of degrees below normal, topping off in the mid to upper 50s throughout.

Surface high pressure builds over the area for the weekend, but some strong shortwave energy associated with a deep closed low offshore will pass through the region on Saturday, and this may touch off some light rain showers. Will cap PoPs at slight chance.

High pressure moves offshore Saturday night through Sunday morning, and then a weak cold front passes through Sunday afternoon. Again, some showers are possible, but will cap PoPs at slight chance for now.

A broad 500 mb ridge develops over the central U.S. for the start of the new week, and WAA will be in place for Monday and Tuesday. Temperatures warm well into the 60s, possibly touching 70 in some spots, during this time. Developing low pressure approaches on Tuesday.

AVIATION /07Z WEDNESDAY THROUGH SUNDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Through this evening . Mainly VFR, however, areas of MVFR ceilings possible through 12z. Winds gradually shifting from northeast to north-northwest through the day. Wind speeds around 10 kt with gusts to 20 kt possible, a little stronger in coastal areas including ACY. Winds will gradually diminish during the later afternoon and evening hours. High confidence.

Tonight . VFR. Northwest wind 5 to 10 kt, with some gusts to 20 kt possible during the latter half of the night. High confidence.

Outlook .

Thursday through Thursday night . Mostly VFR conditions expected. Northwest wind 15 to 20 kt with gusts up to 25 kt. Moderate confidence.

Friday through Friday night . Mostly VFR conditions, however, MVFR conditions possible as rain moves in from the east. N winds 10-15 kt, diminishing to less than 10 kt Friday night. Moderate confidence.

Saturday . Mostly VFR conditions expected with light east winds. Moderate confidence.

Sunday . Starting with VFR conditions, though ceilings could lower to MVFR through the day. Southerly and southwesterly winds of 5 to 10 kt. Moderate confidence.

MARINE. Today . A Gale Warning is in effect for southern portions of the Atlantic coastal waters until 6PM today due to northeast winds gusting up to 35 kt, especially this morning. It is a bit questionable as to whether winds will get quite that strong in most areas, but will maintain the warning for now. Will likely be able to cancel the warning early and replace with an SCA this afternoon. For the northern Atlantic coastal waters, SCA conditions are expected with winds gusting up to 30 kt and seas 4 to 7 ft. For all Atlantic coastal waters, winds will gradually shift from northeasterly to northerly today along with a gradual decrease in speeds this afternoon. On the Delaware Bay, SCA conditions are expected this morning due to northeast winds gusting to 25 kt. This afternoon, conditions will subside to sub-SCA levels as winds gradually shift to northerly then northwesterly and decrease in speed.

Tonight . SCA conditions expected on the Atlantic coastal waters with seas 4 to 6 ft and increasing northwest winds, with gusts 25 to 30 kt likely during the latter half of the night. On the Delaware Bay, initially sub-SCA conditions expected but SCA conditions will develop over the second half of the night as northwest winds gust to 25 kt.

Outlook .

Thursday through Thursday night . SCA conditions on all waters, although a brief period of gales is possible.

Friday through Sunday . SCA conditions are expected, primarily on the coastal waters, mainly due to elevated seas.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Small Craft Advisory until 6 AM EDT Friday for ANZ450>452. Gale Warning until 6 PM EDT this evening for ANZ453>455. Small Craft Advisory until noon EDT today for ANZ430-431. Small Craft Advisory from 1 AM Thursday to 6 AM EDT Friday for ANZ430-431.

Synopsis . MPS Near Term . O'Brien Short Term . O'Brien Long Term . MPS Aviation . MPS/O'Brien Marine . MPS/O'Brien


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 28 mi126 min NE 4.1 G 8 42°F 52°F1009.4 hPa
CPVM2 30 mi54 min 43°F
CA2 - 8571892 - Cambridge, MD 30 mi54 min NE 14 G 17 44°F 54°F1007.1 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 33 mi54 min ENE 13 G 16 41°F 1009.2 hPa
TPLM2 - Thomas Point, MD 33 mi84 min NNE 16 G 17 43°F 51°F1009 hPa (-2.0)35°F
APAM2 - 8575512 - Annapolis, MD 35 mi54 min 43°F 1008 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 37 mi66 min ENE 21 G 27 1008.1 hPa
CHCM2 - 8573927 - Chesapeake City, MD 38 mi54 min ENE 8 G 9.9 41°F 51°F1009.3 hPa
LWSD1 - 8557380 - Lewes, DE 39 mi54 min E 24 G 28 44°F 49°F1007.3 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 41 mi54 min ENE 9.9 G 11 43°F 1008.7 hPa
FSNM2 41 mi66 min NE 12 G 15 42°F 1008.5 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi54 min 41°F 51°F1008.6 hPa
44062 - Gooses Reef, MD 43 mi36 min NE 16 G 19 44°F
DELD1 - 8551762 - Delaware City, DE 44 mi54 min ENE 8.9 G 12 41°F 53°F1009.2 hPa
BLTM2 - 8574680 - Baltimore, MD 45 mi54 min NE 8.9 G 11 42°F 52°F1008.5 hPa
CMAN4 - 8536110 - Cape May, NJ 46 mi54 min NE 8 G 18 43°F 49°F1007.3 hPa
BSLM2 - Chesapeake Bay, MD 49 mi114 min NE 4.1 1008 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 49 mi54 min NNE 17 G 21 1007.6 hPa

Wind History for Tolchester Beach, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Easton / Newman Field, MD17 mi20 minNNE 910.00 miPartly Cloudy42°F37°F85%1008.8 hPa
Dover Air Force Base, DE22 mi28 minNNE 12 G 1810.00 miOvercast41°F34°F76%1007.8 hPa

Link to 5 minute data for KESN

Wind History from ESN (wind in knots)
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Last 24hrCalmCalmCalmCalmN5N5E5E8E8E7E8E10
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1 day agoNE4CalmCalmSW4S6S7S9S7S11
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N6NE11NE5E5NE3NE4CalmNW3CalmCalm
2 days agoNE3CalmNE3NE3CalmCalmCalmE6SE11
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S8S6S5S5E3CalmNW8N11N8NE6NE6NE6E3CalmN10
G15

Tide / Current Tables for Greensboro, Choptank River, Maryland
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Greensboro
Click for Map
Wed -- 02:13 AM EDT     2.08 feet High Tide
Wed -- 02:29 AM EDT     Moonset
Wed -- 06:21 AM EDT     First Quarter
Wed -- 06:47 AM EDT     Sunrise
Wed -- 07:54 AM EDT     0.47 feet Low Tide
Wed -- 12:06 PM EDT     Moonrise
Wed -- 02:37 PM EDT     3.23 feet High Tide
Wed -- 07:27 PM EDT     Sunset
Wed -- 10:07 PM EDT     0.81 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.92.121.71.30.80.60.50.611.62.22.83.23.232.52.11.61.20.90.80.9

Tide / Current Tables for Denton, Choptank River, Maryland (2)
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Denton
Click for Map
Wed -- 01:08 AM EDT     1.81 feet High Tide
Wed -- 02:29 AM EDT     Moonset
Wed -- 06:21 AM EDT     First Quarter
Wed -- 06:47 AM EDT     Sunrise
Wed -- 07:08 AM EDT     0.41 feet Low Tide
Wed -- 12:06 PM EDT     Moonrise
Wed -- 01:32 PM EDT     2.81 feet High Tide
Wed -- 07:27 PM EDT     Sunset
Wed -- 09:21 PM EDT     0.70 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.81.71.51.10.80.50.40.50.81.31.92.52.82.82.62.21.81.41.10.90.70.71

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 (4,6,7,8)
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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.