Thursday, October1, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Greensboro, 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 6:59AMSunset 6:47PM Thursday October 1, 2020 6:32 PM EDT (22:32 UTC) Moonrise 6:05PMMoonset 5:33AM Illumination 100% Phase: Full Moon; Moon at 15 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
    EDIT      (on/off)   Help
ANZ539 Chester River To Queenstown Md- 436 Pm Edt Thu Oct 1 2020
Rest of this afternoon..NW winds 10 kt. Waves 1 ft. A slight chance of showers.
Tonight..N winds 5 to 10 kt. Waves 1 ft. Showers likely.
Fri..NW winds 5 to 10 kt. Waves 1 ft.
Fri night..NW winds 10 kt. Waves 1 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
Sat night..NE winds around 5 kt. Waves 1 ft or less.
Sun..SE winds 5 kt. Waves less than 1 ft. A chance of showers through the night.
Mon..N winds 5 kt. Waves less than 1 ft. A chance of showers.
ANZ500 436 Pm Edt Thu Oct 1 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will pass through tonight. Canadian high pressure will build overhead for Friday and Saturday. Low pressure and its associated cold front will approach the waters Sunday before passing through Sunday night into Monday. A small craft advisory may be required Friday night.


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


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KPHI 011949 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 349 PM EDT Thu Oct 1 2020

SYNOPSIS. A cold front will cross through the region through the overnight, before slowly stalling just offshore. A weak wave of low pressure will ride northward along the front and the coastline Friday, leading to unsettled weather. High pressure will then build into the region through the weekend before another low pressure center begins to deepen offshore. Following this system, high pressure will build into the region for Tuesday and Wednesday before yet another low pressure center moves toward the region into Thursday.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. A pleasant afternoon is in progress with a weak cold front stalling near the coast. Colder air lags well behind the front so it has been a warm day with a lot of low 70s and even some mid 70s showing up. Cloud cover has started to increase as expected, and signals the pending development of a weak weather system which will impact the region tonight.

Synoptically, a shortwave passes to our northwest overnight, easily seen on water vapor satellite this afternoon. This is producing widespread "popcorn" showers to our west in a steep lapse rate environment, but that activity will not make it into our region. As the shortwave gets a little closer and with some added divergence thanks to upper jet positioning, a weak wave of low pressure will develop overnight along the offshore cold front. The best lift will be between the shortwave to our northwest and the offshore low. As lift increases, an area of light rain and showers will develop overnight, mainly near and after midnight, moving in from southwest to northeast. This continues to look like a minor event as moisture is limited and forcing is not very strong. As previous forecaster alluded to, fairly dry in the sub-cloud layer especially in the early going. Model QPF has generally trended up just a bit, but continue to expect amounts mainly in the range of a tenth of an inch, locally up to a quarter of an inch. The steadiest rain looks to be mainly along and west of the I-95 corridor, with lesser chances to the east. Areas right along the coast may stay dry entirely or just see a few sprinkles. A nuisance event overall but wet roads are a good possibility for Friday morning's commute.

Lows tonight will generally fall into the low to mid 50s, with some 40s across the far north.

SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/. Trends have been a little slower regarding the departure of the system from overnight. Lingering light rain or showers are possible into the mid-morning hours especially over the northern half of the area. With time, however, improving conditions are expected as the weak wave of low pressure pulls away and high pressure starts to build in from the west. Expecting any lingering showers to be gone by around noon. Clearing should follow shortly behind, with sunshine developing from southwest to northeast through the late morning and afternoon hours, especially to the west. Northwest flow is expected through the day with a cold advection regime in place. The core of cooler air still lags within the broader trough to the west, but we'll see temperatures come down several degrees from the prior day with highs mainly in the mid 60s.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/. The progressive autumn-like weather pattern continues in earnest through the beginning of next week. Little items of interest to mention in the weekend forecast as high pressure remains in control. Should be a nice weekend to enjoy some outdoor fall time while we can. Highs in the mid to upper 60s.

Things take a turn as we head into the new week as a coastal low begins to form to our south and east just offshore. Latest model guidance doesn't seem to phase the tropical coastal low with the incoming shortwave trough that has been mentioned in previous discussions-the shortwave trough appears to be moving too fast for phasing to occur directly over our region, much to the chagrin of some of us. A decent shot at rain for much of us, however, which may knock some of the fall foliage down. Thankfully, winds don't look all that impressive with this system, with gusts only around 10 to 15 mph. Rainfall amounts will depend on how close to the coast this low begins to deepen, with cyclogenesis to our south and east leading to lower rainfall confined to Delmarva and southern New Jersey.

Dry weather returns for Tuesday and Wednesday as high pressure works its way into the Northeast. Highs a touch cooler in the low to mid 60s.

Indications point to another potent shortwave trough works its way eastward across the Norther Tier of the country. This will lead to the development of a strong surface low across New England with a cold front crossing our region. Details remain rather unclear this far out in terms of exact timing, but there is decent agreement in the presence of a strong system.

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

Through this evening . VFR. Winds mainly from the west or west- northwest at 5 to 10 kt, but may become light and variable. High confidence.

Tonight into Friday morning . Mainly VFR. An area of light rain will affect most of the area starting around 03z to 06z. BKN to OVC cigs of 4000-6000 feet will develop. Brief restrictions to MVFR are possible. Winds light and variable early, becoming west or northwest at 5 to 10 kt. High confidence.

Friday late morning through evening . VFR. Northwest wind 5 to 10 kt. High confidence.

Outlook .

Saturday and Sunday . VFR with northwesterly winds turning southeasterly into Sunday from 5 to 10 knots. Increasing clouds through the day Sunday as well. High confidence.

Monday . Sub-VFR conditions likely as rain moves through the region. Northerly wind from 5 to 10 knots. Moderate confidence.

Tuesday . VFR conditions return as winds turn southerly from 5 to 10 knots. Moderate confidence.

MARINE. Through this evening . Sub-SCA conditions will continue, with 3 to 4 ft seas and winds mainly west or southwest at 5 to 10 kt.

Tonight-Friday . A period of SCA conditions is likely on Lower Delaware Bay and the Atlantic coastal waters of Delaware and southern New Jersey. Winds will shift from southwest to northwest, and as this happens a period of gusts to around 25 kt is expected. Have issued an SCA accordingly. Winds will diminish later Friday morning with sub-SCA conditions returning for the afternoon and evening. Seas around 3 ft.

Outlook .

Saturday and Sunday . Sub-advisory conditions anticipated as northwesterly winds turn easterly into Sunday from 10 to 15 knots. Waves from 1 to 3 feet.

Monday . Sub-advisory level conditions initially will begin to deteriorate into the afternoon as an area of low pressure deepens offshore of the Mid-Atlantic. Northerly winds increasing to 15 to 20 knots with gusts to 25 knots possible by Monday night. Seas building to near 5 feet by Monday evening as well.

Tuesday . Sub-advisory level conditions expected with northerly winds veering to the south-southwest by the afternoon from 10 to 15 knots. Seas remaining from 2 to 4 feet.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Small Craft Advisory from 2 AM to 10 AM EDT Friday for ANZ452>455. Small Craft Advisory from midnight tonight to 7 AM EDT Friday for ANZ431.

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


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 28 mi50 min N 5.1 G 8 69°F 70°F1013.3 hPa
CPVM2 30 mi44 min 70°F 53°F
CA2 - 8571892 - Cambridge, MD 30 mi44 min Calm G 1 75°F 71°F1012.6 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 33 mi50 min 70°F 1013.7 hPa
TPLM2 - Thomas Point, MD 33 mi32 min NE 8.9 G 9.9 69°F 71°F1014 hPa (-0.0)53°F
APAM2 - 8575512 - Annapolis, MD 35 mi44 min 69°F 1012.7 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 37 mi50 min S 2.9 G 4.1 1013.7 hPa
CHCM2 - 8573927 - Chesapeake City, MD 38 mi44 min 70°F
LWSD1 - 8557380 - Lewes, DE 39 mi44 min ESE 4.1 G 5.1 69°F 70°F1013.3 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 41 mi44 min NNW 6 G 7 69°F 1013.2 hPa
FSNM2 41 mi44 min NNW 7 G 8 69°F 1013 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi44 min 71°F
44062 - Gooses Reef, MD 43 mi32 min NNE 12 G 14 70°F 71°F1 ft
DELD1 - 8551762 - Delaware City, DE 44 mi44 min N 4.1 G 6 69°F 62°F1013.4 hPa
BLTM2 - 8574680 - Baltimore, MD 45 mi44 min N 7 G 9.9 70°F 73°F1012.8 hPa
CMAN4 - 8536110 - Cape May, NJ 46 mi44 min SW 5.1 G 5.1 69°F 69°F1013.1 hPa
BSLM2 - Chesapeake Bay, MD 49 mi122 min E 4.1 1012 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 49 mi44 min SSE 5.1 G 6 1013.2 hPa

Wind History for Tolchester Beach, MD
(wind in knots)    EDIT      (on/off)   Help
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
-12
PM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last
24hr
S9
G15
S11
G19
S12
G15
S10
G15
S12
G18
SW12
G19
SW11
G14
SW10
G14
S7
G12
SW11
SW12
SW10
W8
SW6
W5
NW3
NW6
N5
N4
N7
NW6
N5
N9
1 day
ago
S3
G8
SE7
G10
NW11
G17
NW16
NW19
NW15
G20
N18
G23
N14
SE1
W22
W20
G25
W16
G21
W17
G22
W17
W17
G22
W17
G22
W17
G22
W15
W14
G17
W11
G15
W11
SW11
SW13
S8
G13
2 days
ago
SE5
G9
SE5
G9
S5
G9
SE6
G10
S6
G12
S6
G11
S6
G11
SE7
S5
G10
S5
G9
S6
G10
S4
G8
S3
G7
S3
G7
S4
G7
S4
G12
S8
G11
S7
G11
S4
G8
S4
G8
SE6
SE5
SE4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Easton / Newman Field, MD17 mi42 minNW 410.00 miPartly Cloudy70°F57°F64%1014.2 hPa
Dover Air Force Base, DE22 mi36 minNNW 610.00 miFair68°F51°F56%1013.5 hPa

Link to 5 minute data for KESN

Wind History from ESN (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last 24hrS6SW5S6S7S7S6S3S4S5S3S5S3CalmCalmW5SW3W6NW5W7NW5W4N5N5NW4
1 day agoE6SE6SE8S8NW11NW13
G19
W13
G20
NW12
G18
N5CalmW9W9
G15
SW6W6SW6W9W11
G16
W10--SW10
G15
SW10SW7
G14
SW7SW6
2 days agoSE10SE8S9SE6S6SE5S5S6S7S6S4S6SE4S8S6S8S8S8S10SE6SE6SE8SE7SE6

Tide / Current Tables for Greensboro, Choptank River, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Greensboro
Click for Map
Thu -- 02:27 AM EDT     1.15 feet Low Tide
Thu -- 06:32 AM EDT     Moonset
Thu -- 06:59 AM EDT     Sunrise
Thu -- 08:30 AM EDT     3.73 feet High Tide
Thu -- 02:58 PM EDT     1.11 feet Low Tide
Thu -- 05:06 PM EDT     Full Moon
Thu -- 06:45 PM EDT     Sunset
Thu -- 07:05 PM EDT     Moonrise
Thu -- 08:52 PM EDT     3.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.91.51.21.21.52.12.83.43.73.73.42.92.31.71.31.11.31.82.43.13.53.63.43

Tide / Current Tables for Denton, Choptank River, Maryland (2)
   EDIT      (on/off)   Help   One Week of Data
Denton
Click for Map
Thu -- 01:41 AM EDT     1.01 feet Low Tide
Thu -- 06:32 AM EDT     Moonset
Thu -- 06:59 AM EDT     Sunrise
Thu -- 07:25 AM EDT     3.26 feet High Tide
Thu -- 02:12 PM EDT     0.97 feet Low Tide
Thu -- 05:06 PM EDT     Full Moon
Thu -- 06:45 PM EDT     Sunset
Thu -- 07:05 PM EDT     Moonrise
Thu -- 07:47 PM EDT     3.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.31.111.31.82.42.93.23.22.92.521.51.211.11.52.12.73.13.232.62.1

Weather Map
       (on/off)   Help Weather Map
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
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE.
. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. 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.