Friday, September20, 2019 L-36.com


Marine Weather and Tides
Colonial Beach, VA

Version 3.4
NOTICE
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.
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 6:52AMSunset 7:10PM Friday September 20, 2019 4:10 PM EDT (20:10 UTC) Moonrise 10:02PMMoonset 11:51AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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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ANZ536 Tidal Potomac From Indian Head To Cobb Island- 138 Pm Edt Fri Sep 20 2019
This afternoon..S winds 5 kt. Waves less than 1 ft.
Tonight..SW winds 5 kt. Waves less than 1 ft.
Sat..S winds around 5 kt. Waves 1 ft.
Sat night..S winds 5 kt. Waves less than 1 ft.
Sun..S winds around 5 kt. Waves 1 ft.
Sun night..S winds 5 to 10 kt. Waves 1 ft.
Mon..NW winds 5 to 10 kt. Waves 1 ft.
Tue..N winds around 5 kt. Waves 1 ft.
ANZ500 138 Pm Edt Fri Sep 20 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will dominate over the waters through Saturday before settling to the south on Sunday. Small craft advisories may be required Sunday night and into Monday for a portion of the waters.


7 Day Forecast for Marine Location Near Colonial Beach, VA
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location: 38.25, -76.96     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 201859
afdlwx
area forecast discussion
national weather service baltimore md washington dc
259 pm edt Fri sep 20 2019

Synopsis
High pressure will remain over the region through the weekend
with mostly dry conditions and above normal temperatures
expected. The high will shift off the southeast coast by Monday
as a cold front approaches from the ohio valley. In the wake of
the frontal passage, high pressure will situate itself over the
region once again through the middle of next week.

Near term through tonight
Tranquil conditions through tonight as high pressure centers
itself over the mid-atlantic. This will lead to clear skies,
light winds, and dry conditions across the cwa. Southerly winds
will allow for a warming trend heading into the weekend, with highs
this afternoon topping out in the upper 70s to low 80s, falling
back into the 50s tonight under prime radiational cooling
conditions.

Short term Saturday through Sunday night
The aforementioned high will drift a little further to our
south and east through the weekend, allowing for further
warming under a southerly breeze. High temperatures will extend
into low to middle 80s on Saturday, topping out in the middle
to upper 80s Sunday with plentiful sunshine.

Precipitation wise, a slight chance of showers and a
thunderstorm will be possible Saturday afternoon west of the
blue ridge as a weak upper level disturbance tracks across
pennsylvania. GFS is a bit more bullish on QPF coverage, while
the nam ECMWF favoring the drier end of the spectrum. As such,
feel a slight chance covers this well for now. Given warming
temperatures and slightly lower heights, there will be some weak
instability available across the mountains, with MUCAPE values
ranging between 500-1000 j kg. Thus have inserted the mention of
thunder to the gridded database. Any showers or thunderstorm
will quickly dissipate early Saturday evening as the Sun sets.

Thereafter, dry conditions return areawide for the balance of
the weekend.

Long term Monday through Friday
A positively tilted trof over the WRN great lks Monday is
forecast to deepen and become a closed low as it crosses the ern
great lks, southern ontario, and the st. Lawrence river valley
Tuesday. This help push a cold front through the area late
Monday. Showers appear likely along the front Monday afternoon
mainly over the appalachians and areas west of route 15 with
model guidance showing little or no accumulation east of route
15. Cooler temperatures are expected for the middle of next week
under the influence of the upper level trof. Heights begin to
rise sharply on Wed with strong ridge axis settling over the
area by next weekend with 500 mb heights progged higher than
with the ridge currently over the area. This will lead to a
significant warming trend with temperatures AOA 90f for the
second half of next week with record high temperatures possible
for late sep and continued dry weather.

Aviation 17z Friday through Tuesday
Vfr conditions through the weekend as high pressure centers
itself south of the terminals and light southerly breezes
prevail. Can't rule out a passing shower or thunderstorm at mrb
Saturday afternoon, but chances are too low to include in the
taf at this time.

Cdfnt will cross the area late Monday with shifting winds and
gusty winds.

Marine
With high pressure centered south of the waters through Sunday,
sub SCA conditions are expected to prevail. The high will drift
further off the southeast coast Sunday night as a cold front
nears the ohio valley. This will allow for the gradient to
tighten and southerly winds to increase. This may result in sca
gusts returning to the waters Sunday night into Monday morning.

Possible SCA conditions Monday into Tuesday morning in ssw flow
ahead of a front and in NW flow behind frontal passage.

Tides coastal flooding
Anomalies continue to fall across the waters, keeping coastal
flooding concerns below minor flood thresholds. The current
forecast is optimistic that this trend will continue into this
evenings high tide cycle. As such, several of our more
susceptible sites are forecast to remain in action stage this
evening, but will require monitoring to ensure current trends
continue as expected.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Bkf
near term... Bkf
short term... Bkf
long term... Lfr
aviation... Bkf lfr
marine... Bkf lfr
tides coastal flooding... Bkf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 6 mi65 min SE 1.9 G 4.1 75°F 88°F1022.9 hPa
PPTM2 - 8578240 - Piney Point, MD 24 mi53 min SE 2.9 G 4.1
SLIM2 - 8577330 - Solomons Island, MD 27 mi53 min SW 8 G 9.9 75°F 76°F1023.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 32 mi53 min S 9.9 G 12 69°F 1024.5 hPa
LWTV2 - 8635750 - Lewisetta, VA 32 mi65 min E 8 G 9.9 68°F 72°F1024.1 hPa
44042 - Potomac, MD 36 mi29 min ESE 7.8 G 9.7 69°F 76°F1026.6 hPa
44062 - Gooses Reef, MD 36 mi35 min S 9.7 G 12 70°F 1024.5 hPa
BSLM2 - Chesapeake Bay, MD 39 mi101 min S 5.1 76°F 1024 hPa51°F
WASD2 - 8594900 - Washington, DC 43 mi65 min S 9.9 G 11 74°F 77°F1023.4 hPa
BISM2 - 8571421 - Bishops Head, MD 49 mi65 min SSE 5.1 G 7 69°F 75°F1024.8 hPa

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD22 mi28 minW 7 miFair75°F50°F41%1024.4 hPa

Link to 5 minute data for K2W6

Wind History from 2W6 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalmCalmCalmW3CalmW4SW5SW7CalmS5W6W8
1 day ago------------------NE3CalmCalmCalmCalmCalmE3NE4E5NE4E3E5--E3NE3
2 days agoNE4NE5CalmCalmCalmE3E3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE6NE4NE4NE5N3N4N4

Tide / Current Tables for Colonial Beach, Potomac River, Virginia
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Colonial Beach
Click for Map
Fri -- 01:19 AM EDT     0.44 feet Low Tide
Fri -- 06:53 AM EDT     Sunrise
Fri -- 07:08 AM EDT     1.76 feet High Tide
Fri -- 12:51 PM EDT     Moonset
Fri -- 01:22 PM EDT     0.36 feet Low Tide
Fri -- 07:08 PM EDT     Sunset
Fri -- 07:42 PM EDT     1.98 feet High Tide
Fri -- 11:01 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.50.711.41.61.81.71.51.10.80.50.40.40.60.91.31.71.921.81.51.2

Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
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Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Fri -- 03:13 AM EDT     0.00 knots Slack
Fri -- 05:20 AM EDT     0.18 knots Max Flood
Fri -- 06:51 AM EDT     Sunrise
Fri -- 08:03 AM EDT     -0.00 knots Slack
Fri -- 11:08 AM EDT     -0.31 knots Max Ebb
Fri -- 12:49 PM EDT     Moonset
Fri -- 01:54 PM EDT     0.00 knots Slack
Fri -- 05:25 PM EDT     0.44 knots Max Flood
Fri -- 07:06 PM EDT     Sunset
Fri -- 09:14 PM EDT     -0.00 knots Slack
Fri -- 10:59 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.3-0.2-00.10.20.20.10-0.1-0.3-0.3-0.3-0.200.20.30.40.40.30.20-0.2-0.3

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.
Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (16,3,4,5)
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Ground Weather Radar Station Sterling, VA
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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.