Saturday, July4, 2020
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Marine Weather and Tides
Cobb Island, 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 5:47AMSunset 8:37PM Saturday July 4, 2020 11:58 PM EDT (03:58 UTC) Moonrise 7:26PMMoonset 4:05AM Illumination 100% Phase: Full Moon; Moon at 14 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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ANZ537 Tidal Potomac From Cobb Island To Smith Point- 1036 Pm Edt Sat Jul 4 2020
Rest of tonight..S winds 5 to 10 kt. Waves 1 ft.
Sun..SE winds 5 to 10 kt. Waves 1 ft or less.
Sun night..S winds 5 to 10 kt. Waves 1 ft.
Mon..S winds 5 to 10 kt. Waves 1 ft.
Mon night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue..S winds 10 to 15 kt. Waves 1 ft. A chance of showers.
Tue night..S winds 10 to 15 kt. Waves 1 to 2 ft.
Wed..S winds 5 to 10 kt. Waves 1 to 2 ft.
Thu..SE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1036 Pm Edt Sat Jul 4 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak front stalled near the area will weaken tonight into Sunday. High pressure over the atlantic will control the weather pattern for the early and middle portion of next week. Low pressure will pass by to the south during this time.


7 Day Forecast for Marine Location Near Cobb Island, MD
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location: 38.22, -76.75     debug


Area Discussion for - Wakefield, VA
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FXUS61 KAKQ 050210 AFDAKQ

AREA FORECAST DISCUSSION National Weather Service Wakefield VA 1010 PM EDT Sat Jul 4 2020

SYNOPSIS. A weak back door cold front will dissipate south of the area overnight. Weak high pressure will be with us early next week, before more unsettled conditions potentially return for the middle and end of next week.

NEAR TERM /THROUGH SUNDAY/. As of 945 PM EDT Saturday .

Convection has waned across the local area this evening. However, there are still a few showers/tstms along and E of the Blue Ridge, and some of this could clip the Ern VA Piedmont, so a 20% PoP will be maintained through 06z. Otherwise, a subtle backdoor cold front is located over the Piedmont, with light SE flow and more stable conditions to the E of the boundary. Temperatures this evening range from the mid 70s to low 80s under a partly cloudy to mostly clear sky. Seasonably mild and humid tonight with lows in the upper 60s to low 70s. Some patchy fog is possible later tonight into very early Sunday morning, but it is not expected to become dense. Some low stratus is also possible over the Piedmont in vicinity of the front.

On Sunday, the mid level heights will rise slightly, while weak sfc high pressure will be centered along the coast. Expect minimal chances for any convection along the coast of SE VA and NE NC, with PoPs up to about 30-35% into the Piedmont after 18Z. A lot of the high res guidance is showing some seabreeze enhancement on the eastern shore so will also have 20-25% PoPs there. Slightly cooler most places with highs in the upper 80s/low 90s.

SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/. As of 350 PM EDT Saturday .

Will maintain just slight chc PoPs in the Piedmont Sun evening, then mainly dry overnight. Lows Sun night in the upper 60s to lower 70s. More of the same is in store for Mon, with a chance for sctd aftn/evening showers and tstms primarily inland/Piedmont, and lesser chances near the coast. Very warm again on Mon with highs in the upper 80s to lower 90s. By Tue, deeper moisture in association with sfc low pressure moving up from the S will mostly stay in the Carolinas, so PoPs on Tue will again only be 20-30% for most of the region. Highs continue mainly in the upper 80s to lower 90s.

LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/. As of 350 PM EDT Friday .

An upper low gradually pushes ewd toward the Southeast coast Wednesday into Thursday, with the 04/12z ECMWF/CMC slightly faster than the 04/12z GFS. The general consensus is for this system to lift NNE Friday into Saturday, with the ECMWF/CMC tracking it NNE immediately off the coast, and the GFS tracking it NNE over land. Forecast PoPs Wednesday through Saturday average 20-30% NE to 30-50% SW and highest during the aftn/early evening close to the typical summer diurnal cycle. Temperatures Wednesday through Saturday are forecast to be near seasonal averages, with highs in the upper 80s to low 90s (mid 80s at the immediate coast) and lows in the upper 60s to low 70s.

AVIATION /02Z SUNDAY THROUGH THURSDAY/. As of 755 PM EDT Saturday .

The current surface analysis places weak high pressure along the coast. A weak boundary has pushed onshore and is now W of all the TAF sites, and any showers/tstms are located along and W of this boundary. Mostly clear through the early overnight hours with a light ESE wind (NE at ECG), with the potential for some patchy fog/low stratus later tonight as the wind becomes calm and weak surface high pressure settles over the region. Primarily MVFR conditions are expected (VFR at this time for ECG). However, PHF could experience brief IFR conditions with shallow ground from from about 08-11z. Becoming VFR Sunday morning, with a light S to SE wind of 5-8kt. There is a 20% chc of aftn showers/tstms, mainly at RIC and SBY.

Mainly VFR Monday through Wednesday with a 20-30% chc of aftn/early evening showers/tstms. At this time there is a somewhat increased chc of showers/tstms Thursday as low pressure is forecast to become located in vicinity of the Carolinas.

MARINE. As of 350 PM EDT Saturday .

Winds that turned northerly this morning behind a weak front have transitioned to onshore (generally NE/ENE) 10-15 kts this afternoon. Waves in the bay are 1-2 ft with seas 2-3 ft offshore.

Quiet marine conditions are expected to prevail through the weekend with flow becoming south/southeast Sunday night. Guidance shows a few hours of 10-15 knot SSE winds in the bay and northern coastal waters Sunday night and again Monday night, otherwise winds will stay aob 10 knots with waves 1 foot and seas 2-3 ft. Increasing winds/waves/seas are forecast for the mid to late week period as low pressure off the GA/Carolina coast lifts slowly to the north and east.

TIDES/COASTAL FLOODING. As of 1000 PM EDT Saturday .

Issued a Coastal Flood Statement for Dorchester County (mainly for Bishop's Head . as it is expected to crest around minor flood thresholds during high tide early Sun AM). Trended the forecast for Lewisetta up to just below minor flood thresholds, but will not issue a statement attm.

AKQ WATCHES/WARNINGS/ADVISORIES. MD . None. NC . None. VA . None. MARINE . None.

SYNOPSIS . LKB NEAR TERM . AJZ/LKB SHORT TERM . LKB/TMG LONG TERM . AJZ AVIATION . AJZ MARINE . MPR/RHR TIDES/COASTAL FLOODING . AKQ


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPTM2 - 8578240 - Piney Point, MD 13 mi58 min S 8.9 G 11
NCDV2 17 mi58 min S 5.1 G 6 86°F1013.1 hPa (+1.4)
SLIM2 - 8577330 - Solomons Island, MD 17 mi58 min S 7 G 8 82°F1014 hPa (+1.8)
LWTV2 - 8635750 - Lewisetta, VA 22 mi58 min SSW 8 G 8.9 84°F1014.3 hPa (+1.6)
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi154 min SSE 13 G 15 1013.6 hPa
44062 - Gooses Reef, MD 29 mi34 min S 14 G 16 80°F 84°F
BISM2 - 8571421 - Bishops Head, MD 38 mi58 min SSE 8 G 8.9 86°F1014.4 hPa (+1.8)
BSLM2 - Chesapeake Bay, MD 39 mi148 min Calm 1012 hPa
CA2 - 8571892 - Cambridge, MD 44 mi58 min SSE 7 G 8.9 85°F1014.4 hPa (+1.9)
WASD2 - 8594900 - Washington, DC 47 mi58 min SSW 1.9 G 2.9 85°F1013.7 hPa (+1.1)

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD18 mi65 minSSE 410.00 miA Few Clouds80°F73°F79%1013.9 hPa
Patuxent River, Naval Air Station, MD19 mi66 minS 58.00 miFair78°F75°F90%1014.1 hPa

Link to 5 minute data for KNUI

Wind History from NUI (wind in knots)
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Last 24hrCalmCalm3CalmN3NW3CalmCalm4NE9NE8NE6NE764NE5Calm3E4E4SE5SE4SE5S4
1 day agoCalmW3W3CalmW3W44NW4NW43NW5NW6NW4NW5W7SW8W5SW8W6W5W3CalmCalmCalm
2 days agoE3CalmCalmCalmCalmCalmCalmCalmCalm3NW4NE65NW35--NW654NW3CalmCalmCalmCalm

Tide / Current Tables for Colton's Point, Potomac River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
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Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Sat -- 01:40 AM EDT     -0.00 knots Slack
Sat -- 05:02 AM EDT     Moonset
Sat -- 05:44 AM EDT     -1.16 knots Max Ebb
Sat -- 05:47 AM EDT     Sunrise
Sat -- 10:26 AM EDT     0.00 knots Slack
Sat -- 11:38 AM EDT     0.29 knots Max Flood
Sat -- 01:31 PM EDT     -0.00 knots Slack
Sat -- 05:13 PM EDT     -0.66 knots Max Ebb
Sat -- 08:24 PM EDT     Moonrise
Sat -- 08:32 PM EDT     Sunset
Sat -- 08:44 PM EDT     0.00 knots Slack
Sat -- 11:28 PM EDT     0.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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wmap_A
GEOS Local Image of Mid-Atlantic    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Wakefield, VA (23,6,7,8)
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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.