Monday, August19, 2019 L-36.com


Marine Weather and Tides
Cobb Island, MD

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:24AMSunset 7:58PM Monday August 19, 2019 4:56 PM EDT (20:56 UTC) Moonrise 9:19PMMoonset 9:01AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 436 Pm Edt Mon Aug 19 2019
Rest of this afternoon..S winds 10 kt. Waves 1 ft. Scattered showers and tstms.
Tonight..SW winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms.
Tue..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..SW winds 5 to 10 kt. Waves 1 ft.
Wed night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Thu..W winds 5 to 10 kt. Waves 1 ft. A chance of showers through the day. A chance of tstms through the night. Showers likely through the night.
Fri..N winds 5 to 10 kt. Waves 1 ft. Showers likely in the morning. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 436 Pm Edt Mon Aug 19 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the atlantic will deliver a light southerly flow over the region through Tuesday. A cold front will approach the waters Wednesday into Thursday. Small craft advisories may be needed for portions of the waters Wednesday.


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 191946
afdakq
area forecast discussion
national weather service wakefield va
346 pm edt Mon aug 19 2019

Synopsis
Isolated to widely scattered afternoon and evening showers and
thunderstorms will continue through Wednesday as a weak trough
of low pressure will persist across the region. A stronger cold
front moves though the area late Thursday into Thursday night.

High pressure then builds into the area for the weekend.

Near term until 6 am Tuesday morning
As of 305 pm edt Monday...

scattered thunderstorms have developed over the piedmont through
the DELMARVA along the weak lee trough. Some of the storms are a
little stronger across the far north due to the proximity of the
weak upper disturbance noted on water vapor. Could not rule out
a severe storm or two late this afternoon into this evening due
to the strong dcape in excess of 1000 j kg and fairly steep low
level lapse rates. Expect these storms to continue through
early this evening then dissipate soon after sunset due to loss
of daytime heating. Otherwise, tonight will be mild but
generally clear with lows only in the low to mid 70s.

Short term 6 am Tuesday morning through Thursday
As of 305 pm edt Monday...

much of the same for the next few days. May see better activity
east of i-95 tomorrow as the models suggest a weak trough
extending SE across the area. This will serve as a focus for
shower storm development during the afternoon, with locally
heavy rainfall not out of the question due to the slow movement
of any thunderstorm activity and precipitable water values
around 2 inches. Shower storm activity will diminish Tue evening
then develop again mainly across the piedmont Wed aftn along the
lee trough. A stronger frontal boundary moves toward the area
Thursday which will serve as the focus for thunderstorms thu
aftn evening. Will go with 40 50 pops across the entire area
thu. Highs Tuesday will once again be in the low mid 90s, while
Wednesday Thu may be just a tad cooler due to a little more in
the way of cloud cover. However temps will still be in the lower
90s. Heat index values will once again top out in the 100-104
range on Tuesday.

Long term Thursday night through Monday
As of 305 pm Sunday...

a potent area of low pressure (sfc-aloft) continues to slowly track
tracks across quebec Thu night-fri while the trailing cold front
approaches the region from the nw. Convection will likely be ongoing
through a good portion of Thu night as the front (slowly) crosses
the area. Model consensus has the front stalling across SRN va by
12z fri, while the 12z 19 GFS continues to forecast the front to
clear the area by late Fri am. On the other hand, the latest
ecmwf gem both have the front moving very slowly southward across
the area on Fri before clearing the area sometime this weekend. The
cold front potentially stalls (or very slowly moves southward) from
fri-next weekend. If the ECMWF gem solution verifies and the front
slowly moves across SRN portions of the CWA from Fri through the
weekend, this would lead to continued chances of scattered aftn-
evening convection across SRN va NE nc. Far northern portions of the
cwa likely remain dry next weekend (or see only isolated, diurnally-
driven showers tstms) as sfc high pressure over the great
lakes northeast tries to build toward the region. For now, went with
a model blend and have 20-50% pops on Fri Sat (highest S lowest n).

Dry comfortable wx prevails late sun-early next week as sfc ridging
continues to build over the area.

Highs mainly in the low-mid 80s through the extended period with
lows in the 60s (except around 70f in coastal SE va NE nc).

Aviation 20z Monday through Saturday
As of 300 am edt Monday...

expect mostlyVFR though the forecast period. Isolated
showers storms could impact sby and ric this aftn into this
evening which may cause brief flight restrictions but the
chances are not high enough to put into the terminal at this
time. Sby may see some 2sm br vsbys late tonight into early tue
morning as well.

Outlook: a trough will track across the area late Tue aftn into
wed morning, bringing a 20-40% chc of showers tstms. The chc
for showers tstms lessens wed, and then increases Thu as a cold
front approaches from the nw. The potential for showers tstms
could linger into fri, if the cold front slows down or stalls
over the region.

Marine
As of 300 pm edt Monday...

no headlines through mid week. S-sw winds will remain below 15 kt.

Waves 1-2 ft, seas 2-3 ft. A cold front approaches by later in the
week. Pressure gradient is expected to tighten ahead of the front
beginning later on Wednesday into Thursday. At this point winds
appear to stay below SCA but will be examined closely over the
coming days. Waves will still be about 1-2 ft but should see a
slight increase in seas to 2-4 ft. Models suggest the front should
clear the area on Friday which will result in a wind shift to a
northerly component.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... None.

Synopsis... Tmg mrd
near term... Mrd
short term... Ajz mrd
long term... Eri
aviation... Tmg mrd
marine... Cmf


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 mi57 min SSE 8.9 G 9.9
NCDV2 17 mi63 min WSW 1.9 G 2.9 93°F 88°F1013.8 hPa
SLIM2 - 8577330 - Solomons Island, MD 17 mi57 min S 7 G 9.9 93°F 85°F1014.1 hPa (-1.5)
LWTV2 - 8635750 - Lewisetta, VA 22 mi63 min E 7 G 8 88°F 82°F1014.8 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi57 min S 14 G 16 85°F 1015.3 hPa (-1.5)
44062 - Gooses Reef, MD 29 mi27 min SSE 12 G 12 86°F 1015.4 hPa
BISM2 - 8571421 - Bishops Head, MD 38 mi63 min S 12 G 13 88°F 89°F1015.7 hPa
BSLM2 - Chesapeake Bay, MD 39 mi147 min S 2.9 96°F 1014 hPa72°F
CA2 - 8571892 - Cambridge, MD 44 mi63 min SW 5.1 G 8.9 94°F 85°F1014.6 hPa
WASD2 - 8594900 - Washington, DC 47 mi63 min NW 8 G 12 95°F 84°F1014.5 hPa

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last
24hr
SE10
SE9
SE12
SE11
S7
G10
S7
S7
S9
S11
S7
S7
S4
S5
S4
S4
SW5
S4
SE3
SE7
E3
N7
N6
N5
SE9
1 day
ago
SE11
SE10
S13
S10
SW9
SW9
SW10
SW7
G10
SW4
SW5
SW4
G7
S7
SW9
G12
SW5
G8
W4
NW6
NW3
S5
SE5
SE4
SE9
SE13
SE11
SE11
2 days
ago
SE7
SE9
SE9
SE10
G13
S9
S8
S6
S4
W3
SW2
SW2
SW3
SW5
SW5
W4
W3
NW4
W1
SW3
S5
SE7
SE7
SE9
SE10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD12 mi75 minWSW 9 miFair95°F69°F44%1015.6 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD18 mi64 minSSE 710.00 miFair96°F77°F54%1014.4 hPa
Patuxent River, Naval Air Station, MD19 mi65 minSSE 710.00 miPartly Cloudy94°F77°F58%1014.5 hPa

Link to 5 minute data for K2W6

Wind History from 2W6 (wind in knots)
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
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
Last 24hrSE4NE3SE4SE3CalmCalm----Calm----S3CalmCalmCalmS3SW7SW5SW6SW4CalmSW7
G14
W8W7
1 day agoS5SW7S5S4CalmCalmS3CalmCalmCalm--CalmCalmCalmCalmW3CalmE4S5S6SE4S7E4SE4
2 days agoSE5SE5--SE3SE3--CalmCalmCalmCalmCalmCalmCalmCalm--CalmCalmCalmCalmCalmCalmCalmSW3W4

Tide / Current Tables for Colton's Point, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Colton's Point
Click for Map
Mon -- 05:42 AM EDT     2.00 feet High Tide
Mon -- 06:25 AM EDT     Sunrise
Mon -- 10:01 AM EDT     Moonset
Mon -- 11:25 AM EDT     0.25 feet Low Tide
Mon -- 06:02 PM EDT     2.02 feet High Tide
Mon -- 07:55 PM EDT     Sunset
Mon -- 10:18 PM EDT     Moonrise
Mon -- 11:53 PM EDT     0.40 feet Low 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
0.40.611.41.8221.81.30.90.50.30.30.40.81.31.71.921.91.51.10.70.5

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

Mon -- 12:19 AM EDT     0.00 knots Slack
Mon -- 02:22 AM EDT     0.43 knots Max Flood
Mon -- 04:49 AM EDT     -0.00 knots Slack
Mon -- 06:23 AM EDT     Sunrise
Mon -- 08:50 AM EDT     -0.83 knots Max Ebb
Mon -- 10:00 AM EDT     Moonset
Mon -- 12:59 PM EDT     0.00 knots Slack
Mon -- 03:01 PM EDT     0.46 knots Max Flood
Mon -- 05:42 PM EDT     -0.00 knots Slack
Mon -- 07:54 PM EDT     Sunset
Mon -- 09:20 PM EDT     -0.62 knots Max Ebb
Mon -- 10:17 PM EDT     Moonrise
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
-0.10.20.40.40.2-0.1-0.4-0.6-0.8-0.8-0.7-0.6-0.300.30.50.40.2-0.1-0.3-0.5-0.6-0.6-0.5

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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
Wind Forecast for Wakefield, VA (16,3,4,5)
      (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.