Wednesday, September23, 2020
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Marine Weather and Tides
Cordova, 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 6:52AMSunset 7:00PM Wednesday September 23, 2020 3:52 PM EDT (19:52 UTC) Moonrise 1:03PMMoonset 10:35PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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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ANZ540 Eastern Bay- 137 Pm Edt Wed Sep 23 2020
This afternoon..SW winds 10 kt. Waves 1 ft.
Tonight..W winds 5 to 10 kt. Waves 1 ft.
Thu..SW winds 5 kt. Waves less than 1 ft.
Thu night..SW winds 5 kt. Waves less than 1 ft.
Fri..SW winds 5 kt. Waves less than 1 ft. A chance of showers.
Fri night..S winds 5 kt. Waves less than 1 ft. A chance of showers.
Sat..S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers in the morning. Patchy fog in the morning.
Sun..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night.
ANZ500 137 Pm Edt Wed Sep 23 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will weaken and move south of the area through tonight, then move offshore Thursday into Friday. The remnants of beta will likely pass to the south while weakening Friday into Saturday. A couple cold fronts are expected to approach from the great lakes and ohio river valley late in the weekend into early next week. Small craft advisories may be needed for portions of the waters later Friday into Saturday.


7 Day Forecast for Marine Location Near Cordova, MD
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location: 38.9, -76.1     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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FXUS61 KPHI 231808 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 208 PM EDT Wed Sep 23 2020

SYNOPSIS. High pressure will slowly drift off the southeast coast through late this week into this coming weekend. A cold front looks to move through from west to east sometime late Sunday or Monday.

NEAR TERM /THROUGH TONIGHT/. An expansive area of high pressure remains over the midwestern states extending towards the SE CONUS while Post-Tropical Storm Teddy continues to churn through Atlantic Canada. This is resulting in a continuing pressure gradient over the area keeping things a bit breezy but dry and sunny with the W/NW flow.

No big changes tonight as Teddy continues to move away to the north as it moves east of Labrador while ridging persists to our south and west. That said, the other player that will eventually impact our weather is the remnants of Beta which is currently near the Gulf Coast. Late tonight, some high level moisture streaming north well in advance of it looks to bring some increasing high cloudiness in. The trend of warmer overnight lows will also continue with tonight being warmer than last night. Expect lows mainly in the 50s except low 60s in parts of the urban corridor around Philly.

SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/. For Thursday, surface ridging over the SE CONUS weakens as the center of high pressure moves off the SE coast into the western Atlantic. Meanwhile in the upper levels the energy aloft associated with Beta will start to get sheared apart as it enters a jet streak over the east coast ahead of an upper trough centered near the midwest. This will allow high cloudiness to lower and thicken through the day as moisture continues to advance north in these levels but there still should be at least some sun visible through the clouds at least through the first part of the day. Also, it will remain dry in the lowest 10 to 15 k ft due to the influence of residual surface ridging over the area so expect the day to remain rain free. Highs will once again be mainly in the middle to upper 70s with dew points in the 50s so still not too humid.

Nothing changes too much for Thursday night though we will have to watch as the northern edge of deeper layer moisture from Beta makes its way closer to the area. Expect it to still stay dry through the period for our CWA though so we keep POPs below 15 percent.

LONG TERM /FRIDAY THROUGH WEDNESDAY/. The medium-range forecast looks fairly active, as the pattern transitions to a western-ridge/eastern-trough configuration by early next week. As large-scale trough amplification occurs Sunday and Monday in vicinity of the Midwest/Great Lakes, a series of surface cyclones will develop with attendant cold fronts. The timing/strength of these fronts is the primary forecast challenge for our region.

Saturday's forecast remains muddled owing to the track of Beta's remnants, but currently expect chances for PoPs to be fairly low by Saturday afternoon and night. Highs and lows should be near to slightly above average.

In general, the synoptic evolution from Sunday through Tuesday looks fairly straightforward. The first potent vort max will dig into the Great Lakes on Sunday before lifting northeastward via downstream ridge amplification on Monday. A surface low will strengthen in advance of the trough in vicinity of the Saint Lawrence Valley Sunday and Sunday night, with a cold front progged to move through the Northeast by Monday. Generally have chance PoPs for the area Sunday afternoon through Monday, and have also included a slight chance of thunderstorms owing to a pronounced improvement in low-to-midlevel lapse rates via strong synoptic ascent in advance of the trough. However, coverage and timing of precipitation remain unclear, given some pronounced differences among the deterministic models. The ECMWF may be on the slow side, given its tendency to amplify these systems too much.

A brief dry period is likely before the second and stronger system digs into the Great Lakes on Tuesday. Rapid cyclogenesis will occur in this vicinity, with a strong cold front likely to approach the region by Tuesday night or Wednesday as the large- scale trough acquires a neutral to slightly negative tilt. This system will bring our first chance of rather widespread convection with potential for decent QPF in a long while to the area. After a period of lower PoPs Monday night and Tuesday morning, increased probabilities return Tuesday afternoon onward.

Temperatures Sunday through Tuesday will be near to slightly above seasonal averages.

AVIATION /18Z WEDNESDAY THROUGH MONDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Through tonight . VFR. West to northwest winds around 10 knots with gusts 15 to 20 knots at times this afternoon. Winds diminishearly this evening becoming light and variable by the overnight period. High confidence.

Thursday and Thursday night . VFR with mainly light west to southwest winds at speeds of 5 to 8 knots or less. High confidence.

Outlook .

Friday through Saturday . Low-confidence forecast, with the remnants of Beta moving through portions of the eastern U.S. It is possible some precipitation associated with the system moves into the area during this time frame, with the best chances south of PHL. Should this occur, periods of sub-VFR are probable in proximity to the precipitation. However, if the system moves farther south of the area, mainly VFR and dry conditions would occur. Winds are generally expected to be light and mainly from a southerly direction.

Saturday night and Sunday . Mainly VFR, but some restrictions possible with a chance of showers, especially on Sunday. South to southwest winds 5 to 15 kt (lighter at night). Low confidence on potential for restrictions.

MARINE. We've cancelled the SCA for our northern 2 Atlantic Waters zones as seas have diminished. Elsewhere for the Atlantic waters, seas still hovering around 5 to 7 feet so SCA remains in effect until 8 PM this evening.

For Delaware Bay, sub-advisory conditions are expected through tonight.

All marine zones expected to see sub Small Craft Advisory conditions for Thursday and Thursday night.

Outlook .

Friday through Sunday . Sub-advisory winds/seas expected. Periodic chances for showers Friday through Sunday.

Rip currents .

A high risk of rip currents remains on the Atlantic beaches of New Jersey and Delaware today, as a very long-period swell continues. With seas subsiding, we expect the rip- current risk will lower to the moderate category on Thursday.

TIDES/COASTAL FLOODING. Models have generally been forecasting tidal levels too low the past several hours. Surge has increased from Teddy churning well northeast of the area, and models suggest the surge will peak later this morning. High tide is during the early afternoon, and it is the higher of the two daily cycles. ETSS and Stevens Institute ensemble data support widespread minor flooding on the Atlantic coast during the high tide today.

A Coastal Flood Advisory remains in effect until 6 pm for the Atlantic coast, including associated back bays and the southern shore of Raritan Bay.

For Delaware Bay and the tidal Delaware River, confidence is lower in tidal levels reaching advisory thresholds. However, some guidance is quite aggressive in generating a surge up into the tidal Delaware River this afternoon. For now, think this is overdone, but we will be we are watching observations closely to determine if the more aggressive solutions are on to something.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . High Rip Current Risk until midnight EDT tonight for NJZ014- 024>026. Coastal Flood Advisory until 6 PM EDT this evening for NJZ012>014-020-022>027. DE . High Rip Current Risk until midnight EDT tonight for DEZ004. Coastal Flood Advisory until 6 PM EDT this evening for DEZ003- 004. MD . None. MARINE . Small Craft Advisory until 8 PM EDT this evening for ANZ452>455.

Synopsis . CMS/Fitzsimmons Near Term . Fitzsimmons Short Term . Fitzsimmons Long Term . CMS Aviation . CMS/Fitzsimmons Marine . CMS/Fitzsimmons Tides/Coastal Flooding . WFO PHI


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPVM2 17 mi53 min 74°F 59°F
TPLM2 - Thomas Point, MD 18 mi53 min WSW 6 G 8 74°F 70°F1014.8 hPa (-2.3)55°F
APAM2 - 8575512 - Annapolis, MD 21 mi53 min SW 4.1 G 8 78°F 71°F1013.2 hPa (-2.4)
CA2 - 8571892 - Cambridge, MD 23 mi53 min W 7 G 9.9 74°F 69°F1014.2 hPa (-2.0)
TCBM2 - 8573364 - Tolchester Beach, MD 23 mi53 min SSW 6 G 6 74°F 68°F1013.6 hPa (-2.3)
44062 - Gooses Reef, MD 29 mi35 min WSW 5.8 G 5.8 74°F 72°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 32 mi53 min W 9.9 G 12 76°F 1013.4 hPa (-2.4)
FSNM2 32 mi53 min W 11 G 13 76°F 1013.3 hPa (-2.3)
BSLM2 - Chesapeake Bay, MD 33 mi143 min WNW 5.1 1015 hPa
BLTM2 - 8574680 - Baltimore, MD 36 mi53 min WNW 4.1 G 9.9 79°F 75°F1012.9 hPa (-2.6)
COVM2 - 8577018 - Cove Point LNG Pier, MD 38 mi53 min WSW 8.9 G 11 1014.9 hPa (-2.1)
SLIM2 - 8577330 - Solomons Island, MD 44 mi53 min WSW 5.1 G 6 77°F 71°F1014.3 hPa (-2.1)
CHCM2 - 8573927 - Chesapeake City, MD 46 mi53 min WSW 5.1 G 8.9 77°F 69°F1013 hPa (-2.1)
BISM2 - 8571421 - Bishops Head, MD 47 mi53 min WSW 6 G 7 70°F 67°F1014.5 hPa (-1.7)
SJSN4 - 8537121 - Ship John Shoal, NJ 47 mi53 min 75°F 1013.4 hPa (-1.9)
WASD2 - 8594900 - Washington, DC 49 mi53 min NW 4.1 G 9.9 80°F 69°F1014.2 hPa (-2.7)

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Easton / Newman Field, MD7 mi63 minWSW 610.00 miClear79°F53°F42%1015.2 hPa
Bay Bridge Field, MD13 mi58 minW 610.00 miFair77°F53°F44%1013.9 hPa
Annapolis, United States Naval Academy, MD21 mi59 minWNW 610.00 miFair77°F54°F45%1013.8 hPa

Link to 5 minute data for KESN

Wind History from ESN (wind in knots)
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Last 24hrNW9W9W5W5W5SW4SW4W3CalmCalmCalmW3W3NW3CalmCalmCalmCalmNW8W6W8W7W7W6
1 day agoNE8NE6N7N4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4N5N6NW7NW12W12NW10
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N7N6CalmCalmNE4NE3NE4NE5N4N3N5N4N5N5N7N10N12
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Tide / Current Tables for Wye Landing, Wye East River, Maryland
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Wye Landing
Click for Map
Wed -- 05:43 AM EDT     0.75 feet Low Tide
Wed -- 06:53 AM EDT     Sunrise
Wed -- 09:55 AM EDT     1.50 feet High Tide
Wed -- 02:02 PM EDT     Moonrise
Wed -- 04:20 PM EDT     0.34 feet Low Tide
Wed -- 06:58 PM EDT     Sunset
Wed -- 09:56 PM EDT     First Quarter
Wed -- 11:01 PM EDT     2.37 feet High Tide
Wed -- 11:35 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.81.51.210.80.80.91.21.41.51.41.20.90.70.50.40.40.611.51.92.32.4

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 01:34 AM EDT     -0.00 knots Slack
Wed -- 04:47 AM EDT     -0.96 knots Max Ebb
Wed -- 06:54 AM EDT     Sunrise
Wed -- 08:26 AM EDT     0.00 knots Slack
Wed -- 10:52 AM EDT     0.48 knots Max Flood
Wed -- 01:26 PM EDT     -0.00 knots Slack
Wed -- 02:04 PM EDT     Moonrise
Wed -- 04:30 PM EDT     -0.64 knots Max Ebb
Wed -- 07:00 PM EDT     Sunset
Wed -- 07:17 PM EDT     0.00 knots Slack
Wed -- 09:56 PM EDT     First Quarter
Wed -- 11:00 PM EDT     1.07 knots Max Flood
Wed -- 11:36 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.3-0.2-0.6-0.9-1-0.8-0.5-0.20.20.40.50.40.1-0.2-0.4-0.6-0.6-0.4-0.10.30.711.1

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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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.