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 8:07 AM EDT (12:07 UTC) Moonrise 9:50AMMoonset 11:09PM Illumination 20% 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
    EDIT      (on/off)   Help
ANZ537 Tidal Potomac From Cobb Island To Smith Point- 731 Am Edt Wed Jun 28 2017
.small craft advisory in effect from this evening through late tonight...
Today..N winds 10 to 15 kt...diminishing to 5 kt early this afternoon, then becoming se late. Waves 1 to 2 ft.
Tonight..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Thu..S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Thu night..S winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Fri..S 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..S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of tstms through the night. Scattered showers.
Sun..W winds around 5 kt. Waves 1 ft. A chance of showers through the day. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 731 Am Edt Wed Jun 28 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move over the area today 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
   Hourly   EDIT   Help
location: 38.22, -76.75     debug


Area Discussion for - Wakefield, VA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kakq 281044
afdakq
area forecast discussion
national weather service wakefield va
644 am edt Wed jun 28 2017

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

Near term through tonight
Sfc hi pres will build over the region on today... Providing dry
wx and very comfortable conditions under a sunny or mostly
sunny sky. Highs in the l-m80s... Except m-u70s at the beaches.

Short term Thursday through Friday
The high will slide out to sea later tonight thru fri. Dry
wx will prevail. Ssw flow will start to increase on thu
resulting in a warmer and more humid airmass. Clear or mostly
clear tonight with lows 55 to 60f inland... 60 to 65f at the
coast. Partly to mostly sunny on Thu with highs in the m80s to
around 90f... L80s at the beaches.

That ssw flow will bring increasing dewpts low level moisture
into the region for Thu night and fri. Enough of that moisture
combined with heating and very weak lift could trigger isold
shras tstms over far SRN SW counties Fri evening. Lows thu
night in the m60s to around 70f. Highs on Fri in the 80s-
l90s... L80s at the beaches.

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 12z Wednesday through Sunday
Sfc hi pres builds over the region today... Then shifts slowly
off the coast thu-fri.VFR conditions W mainly light winds (aob
10 kt) into thu... Some increase in speeds but remaining mainly
aob 15 kt Thu afternoon into Fri as winds become ssw. The next
chance for shras tstms will be late fri-sat.

Marine
The brief northerly surge on the bay from earlier this morning
continues to diminish as of 630 am. Winds become nne around 10
kt all areas by late morning. Waves subside to 1-2 ft on the bay by
aftn; seas around 2 ft. As sfc high pressure builds overhead
this 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). SCA headlines may be needed late Thu thu night.

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... Alb tmg
near term... Alb
short term... Alb tmg
long term... Lkb
aviation... Jef wrs
marine... Jdm


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
PPTM2 - 8578240 - Piney Point, MD 13 mi50 min NE 4.1 G 4.1
SLIM2 - 8577330 - Solomons Island, MD 17 mi50 min WNW 2.9 G 4.1 69°F 78°F
NCDV2 17 mi50 min W 1 G 1.9 64°F 77°F1021 hPa
LWTV2 - 8635750 - Lewisetta, VA 22 mi50 min NE 2.9 G 4.1 71°F 77°F1021.3 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi50 min E 5.1 G 8 69°F 1022.1 hPa
44042 - Potomac, MD 26 mi38 min N 5.8 G 9.7 72°F 1020.6 hPa
44062 - Gooses Reef, MD 29 mi38 min NNE 7.8 G 12 71°F 1022.3 hPa
BISM2 - 8571421 - Bishops Head, MD 38 mi50 min N 5.1 G 8 69°F 76°F1021.5 hPa
BSLM2 - Chesapeake Bay, MD 39 mi158 min Calm 51°F 1021 hPa50°F
44061 - Upper Potomac, MD 42 mi50 min SW 1.9 G 3.9 70°F 79°F1021.7 hPa
CA2 - 8571892 - Cambridge, MD 44 mi50 min 71°F 79°F1022.1 hPa
WASD2 - 8594900 - Washington, DC 47 mi50 min W 1 G 1.9 67°F 80°F1021.3 hPa

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
NE5
NE6
NE4
NW4
NW4
W5
NW9
NW5
N6
N4
SW2
G5
N12
G17
N3
S5
S5
N10
G13
N11
N8
NE6
N8
NE7
NE6
N6
NE5
1 day
ago
N10
N6
NW5
NW6
W4
W2
N6
N6
SW1
S7
S11
SE10
S11
S9
S12
S12
G15
SW13
SW12
W6
W6
NW7
N6
NE3
N14
2 days
ago
N9
N9
N10
N11
N8
NW6
NW7
NW8
NW5
N3
NW1
S2
S4
W7
N12
N7
N7
N8
N9
N10
NW9
N13
N13
N11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD12 mi75 minN 010.00 miFair55°F51°F88%1022 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD18 mi75 minN 010.00 miFair60°F57°F93%1021.1 hPa
Patuxent River, Naval Air Station, MD19 mi76 minWSW 510.00 miA Few Clouds64°F55°F75%1021.2 hPa

Wind History from NUI (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hr4N344--W4SW85W6W5NW3E3E3CalmCalmCalm3CalmCalmCalmCalmCalmCalmCalm
1 day ago4CalmN4NW5NW3SW8SW6CalmS3S5SE5SE6E3SE3S7S8S6S6S7SW5CalmCalmCalmN5
2 days agoCalm34444SW5SW9SW7SW6W5S3S3SE4W93NW3CalmCalmNW4NW4335

Tide / Current Tables for Colton's Point, Potomac River, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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
   EDIT      (on/off)   Help   One Week of Data
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
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Wakefield, VA (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.