Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Cobb Island, MD

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:44AMSunset 8:37PM Wednesday June 28, 2017 1:13 AM EDT (05:13 UTC) Moonrise 9:50AMMoonset 11:09PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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- 1031 Pm Edt Tue Jun 27 2017
.small craft advisory in effect until 8 am edt Wednesday...
.small craft advisory in effect from Wednesday evening through late Wednesday night...
Rest of tonight..NW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Wed..N winds 5 to 10 kt with gusts to 20 kt... Becoming se late. Waves 1 to 2 ft.
Wed night..S winds 10 to 15 kt. Gusts up to 25 kt in the late evening and overnight. Waves 1 to 2 ft.
Thu..S winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Thu night..SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft.
Fri..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Fri night..S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sat..SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and tstms.
Sun..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms in the morning. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Tue Jun 27 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak cold front will cross the chesapeake bay region tonight. High pressure will move over the area Wednesday before shifting to bermuda through Thursday. Small craft advisory conditions are possible over portions of the waters Thursday.

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 280252
afdakq
area forecast discussion
national weather service wakefield va
1052 pm edt Tue jun 27 2017

Synopsis
High pressure builds over the area Wednesday, then slides off
the coast for Wednesday night through Friday.

Near term until 6 am Wednesday morning
Shower and thunderstorm coverage over the lower maryland eastern
shore has diminished late this evening as the associated upper
level shortwave slides offshore. Expect only isolated to widely
scattered showers and thunderstorms through 05-06z before the
best moisture and energy pushes offshore. Sky has cleared
inland, with only a few high passing clouds through the
overnight period as high pressure builds in from the west
overnight. Cool and dry overnight, with lows dropping into the
50's inland to low 60's near the coast.

Short term 6 am Wednesday morning through Friday
Sfc high pressure will build over the region on wed, providing
dry weather and comfortable conditions under a sunny or mostly
sunny sky. Highs in the lower to mid 80s, except mid to upper
70s at the beaches.

The high will slide out to sea later Wed night thru fri. Dry
weather will prevail thru Thu night, but ssw flow will start to
increase on Thu resulting in a warmer and more humid airmass.

Clear or mostly clear Wed night with lows 60 to 65. Partly to
mostly sunny on Thu with highs in the mid 80s to near 90.

That ssw flow will bring increasing dewpts low level moisture
into the region for Thu night and fri. Enough of that moisture
combined with weak lift could trigger widely sctd showers or
tstms over SRN SW counties Fri aftn into Fri evening. Lows thu
night in the mid 60s to near 70. Highs on Fri in the upper 80s
to lower 90s.

Long term Friday night through Tuesday
Long term period will feature a fairly typical summertime pattern
with a weakening cold front approaching from the W NW on Sat with a
lee sfc trough out ahead of the front. Still capping pops at 20-40%
in the aftn evening under partly-mostly sunny skies as any more
significant forcing stays NW closer to the front. Lows mainly 70-75
f with highs Sat primarily in the upper 80s to lower 90s. Sunday
will see the front wash out across the local area, will maintain 20-
30% pops (except 30 to 40% over northeast nc). Highs in the upper
80 around 90 f. May even be able to lower pops a little more across
the N with later model runs but wanted to keep some continuity given
the weak front and a lot of uncertainty as to how much it actually
weakens. Mon Tue will see the local area generally in light flow and
minimal forcing. It will be very warm and humid with enough
aftn early evening instability along a lee trough for ~20% pops most
areas. Highs 90-95 f inland and mid-upper 80s lower 90s near the
coast. Lows generally 70-75 f.

Aviation 02z Wednesday through Sunday
A line of showers and isolated thunderstorms will affect the
eastern shore of maryland and sby early this evening, otherwise
vfr conditions with mostly scattered middle and high clouds
across the CWA tonight. The showers expected to move or
dissipate from the region by midnight. A weak trough of low
pressure will pass through the eastern portions of the region
early tonight before dissipating. Then mostly clearing should
occur as high pressure builds into the mid atlantic region.

Winds will be light through the TAF period as the high centers
over the area.

Outlook:VFR conditions expected for much of the week. Surface
high will slide off the coast on Thursday. The next chance for
showers thunderstorms will be late Friday Saturday.

Marine
Winds are now less than 10 kt across the marine area and outside of
convection winds this evening will be rather light. A weak frontal
boundary pushes through the waters later tonight, with pressure
rises Wed morning as sfc high pressure builds into the area from the
nw. This will allow for a brief surge of higher N winds to around 15
kt with gusts near 20 kt, mainly from 09-12z Wed morning. Still
looks too marginal short-lived to have any headlines but waves will
increase a bit as well to 2-3 ft in the ocean and lower bay wed
morning. As the sfc high builds overhead by aftn, expect much
lighter onshore flow to develop at 5-10 kt. High pressure slides
well off the coast Thursday Friday with return flow resulting in
increasing s-sw winds to 15-20 kt. Waves 2-3 ft on the bay and seas
possibly building to 4-5 ft north of parramore island (genly more
like 2-4 ft for southern coastal waters). A few SCA headlines may be
needed late Thu thu night, but they will be marginal events. A slow
moving cold a front approaches from the NW Sat but weakens by the
time it reaches the local area on Sunday. Thus, outside of any tstms
conditions will be sub-sca with winds only 10-15 kt or less.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... None.

Synopsis... Tmg
near term... Sam tmg
short term... Tmg
long term... Lkb
aviation... Jef wrs
marine... Lkb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPTM2 - 8578240 - Piney Point, MD 13 mi43 min N 9.9 G 11
SLIM2 - 8577330 - Solomons Island, MD 17 mi43 min NNW 7 G 9.9 71°F 79°F
NCDV2 17 mi43 min NNW 2.9 G 5.1 67°F 79°F1018.1 hPa
LWTV2 - 8635750 - Lewisetta, VA 22 mi43 min N 9.9 G 14 72°F 79°F1018.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi43 min N 16 G 22 73°F 1019.2 hPa
44042 - Potomac, MD 26 mi33 min N 14 G 16 71°F 1017.8 hPa
44062 - Gooses Reef, MD 29 mi33 min N 16 G 19 73°F 1019.2 hPa
BISM2 - 8571421 - Bishops Head, MD 38 mi43 min NNW 8 G 8.9 69°F 80°F1018.5 hPa
BSLM2 - Chesapeake Bay, MD 39 mi103 min Calm 65°F 1018 hPa56°F
44061 - Upper Potomac, MD 42 mi55 min NNW 5.8 G 7.8 68°F 80°F1019 hPa
CA2 - 8571892 - Cambridge, MD 44 mi43 min 72°F 81°F1019.4 hPa
WASD2 - 8594900 - Washington, DC 47 mi43 min WNW 4.1 G 6 70°F 81°F1018.6 hPa

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD12 mi20 minN 010.00 miOvercast68°F50°F53%1019.6 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD18 mi20 minN 010.00 miFair63°F57°F81%1018.5 hPa
Patuxent River, Naval Air Station, MD19 mi81 minN 1010.00 miA Few Clouds72°F48°F44%1018.4 hPa

Wind History from 2W6 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmW3CalmCalmCalmN4N3NW4W7W4W4CalmW5NW3CalmCalmCalmCalmCalmCalm
1 day agoW3W3W3CalmCalmCalmCalmW3N4CalmSW4W3W7S7SW10SW8SW4S4SE5SE3CalmSE3CalmCalm
2 days ago--CalmW3CalmCalmCalmCalmCalmNW4NW5NW4CalmCalmW6W6SW6SW4SW6SW3CalmW5W3W3Calm

Tide / Current Tables for Colton's Point, Potomac River, Maryland
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Colton's Point
Click for Map
Wed -- 12:18 AM EDT     0.11 feet Low Tide
Wed -- 05:46 AM EDT     Sunrise
Wed -- 06:40 AM EDT     2.19 feet High Tide
Wed -- 10:49 AM EDT     Moonrise
Wed -- 12:53 PM EDT     0.00 feet Low Tide
Wed -- 07:20 PM EDT     2.07 feet High Tide
Wed -- 08:34 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.20.511.51.92.12.21.91.410.50.200.20.61.11.61.92.121.61.20.8

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

Wed -- 12:32 AM EDT     0.00 knots Slack
Wed -- 02:51 AM EDT     0.60 knots Max Flood
Wed -- 05:28 AM EDT     -0.00 knots Slack
Wed -- 05:44 AM EDT     Sunrise
Wed -- 09:36 AM EDT     -1.10 knots Max Ebb
Wed -- 10:48 AM EDT     Moonrise
Wed -- 01:58 PM EDT     0.00 knots Slack
Wed -- 03:51 PM EDT     0.50 knots Max Flood
Wed -- 06:28 PM EDT     -0.00 knots Slack
Wed -- 08:33 PM EDT     Sunset
Wed -- 09:58 PM EDT     -0.65 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.20.50.60.50.2-0.2-0.6-0.9-1.1-1.1-1-0.7-0.400.40.50.40.1-0.2-0.4-0.6-0.6-0.6

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Wakefield, VA (1,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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 numerious 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.