Saturday, April29, 2017 L-36.com


Marine Weather and Tides
King George, VA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:12AMSunset 8:01PM Saturday April 29, 2017 1:22 AM EDT (05:22 UTC) Moonrise 8:04AMMoonset 10:43PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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- 1031 Pm Edt Fri Apr 28 2017
Rest of tonight..S winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Sat night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Sun..S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance of showers and tstms.
Sun night..S winds 5 to 10 kt. Waves 1 ft.
Mon..S winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of showers and tstms.
Mon night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers and tstms likely.
Tue..W winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft. A chance of showers in the morning.
Wed..N winds 5 to 10 kt. Waves 1 ft. A chance of rain through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Fri Apr 28 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain centered over bermuda into Tuesday. A cold front will cross the mid-atlantic Monday night with canadian high pressure then building over the area through Wednesday. A small craft advisory is likely Monday into Tuesday.

7 Day Forecast for Marine Location Near King George, VA
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location: 38.24, -77.18     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 290136
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
936 pm edt Fri apr 28 2017

Synopsis
High pressure will persist over bermuda into Tuesday. A
stationary front will linger over southern pennsylvania late
tonight through Saturday before lifting north Sunday. A
stronger cold front will move across the region from the west
Monday night. Canadian high pressure will then build over the
area through the midweek.

Near term /until 6 am Saturday morning/
As of 9pm, low pressure is over the big bend region of texas
with a warm/stationary front extending NE across the ohio valley
and reaching the eastern west virginia panhandle. Severe
convective storms have developed on the north side of this front
along the ohio river valley and will move northeast through the
night. Instability increases and bulk shear remains high through
the night. This should allow strong to possibly locally severe
thunderstorms to move along this front late tonight. This puts
the northern third of the CWA at risk. Height rises associated
with warm air advection should make the activity elevated with
hail as the primary threat.

Spc has expanded the marginal risk for this area and our
hazardous weather outlook mentions this threat for this area as
well. This will continue to be monitored through the night. 00z
hrrr continues recent trend of perhaps two rounds of convection,
one late tonight and the second toward daybreak. This is
climatologically the minimum in thunderstorm activity, but not
unheard of.

Lows primarily in the 60s, but the cities may not drop below 70.

This has never happened before in dc (in april) - record high
min is 69 set in 1896.

The year 1896 holds the record high min for baltimore for five
consecutive nights in april. They dropped only to 70 on april
19, 1896.

See climate section for more information.

Short term /6 am Saturday morning through Sunday night/
"hot" will be the operative word for Saturday as high pressure
moves off the southeast coast and pumps warm air into the mid
atlantic. Again, see the climate section below for high
temperature records - these will definitely be in jeopardy. Heat
indices will be in the low/mid 90s in the i-95 corridor, nowhere
near heat advisory levels but notable for april.

Continued warm temperatures Saturday night/Sunday. There is not
any real trigger for organized convection approaching, but this
is somewhat of a summertime pattern. Hence it is not out of line
to see orographically driven storms develop Sunday afternoon.

The best thunderstorm chances hold off until Monday.

Long term /Monday through Friday/
A cold front over the eastern ohio valley early Monday will move
across the region Monday into Monday night. Showers and
thunderstorms, some strong, will develop ahead of and along the cold
front Monday afternoon and evening. Temperatures will be about 15
degrees above normal.

Weak high pressure will build in behind the cold front Tuesday. A
gusty westerly breeze will usher in drier air. Temperatures will not
be as warm as Monday, but could still be 5 to 10 degrees above
normal.

As the high moves east, a secondary cold front will move across the
region from the northwest Tuesday night. This front should be a dry
front. The front could sag into the carolinas Tuesday night before
starting to move northward as a warm front on Wednesday.

A low pressure system is expected to develop along the western end
of the warm front over the lower mississippi valley Wednesday night
and early Thursday. We introduce a slight chance of showers or a
rumble of thunder Wednesday night with a higher chance to likelihood
of encountering showers and thunderstorm Thursday through
early Friday.

At the tail-end of an associated cold front with the storm system,
another storm system could develop and deepen over the interior
southeast u.S. Friday and Friday night. The chance of showers and
thunderstorms will linger during the period. Temperatures will also
be closer to normal Friday and Friday night.

Aviation /01z Saturday through Wednesday/
Vfr conditions prevail tonight through Sunday night. A few
thunderstorms possible overnight with mrb being the main
consideration though vcts for iad and bwi/mtn were also
warranted.

Ifr to lifr conditions possible Monday and Monday night from
thunderstorms associated with a strong cold front moving through.

Vfr conditions Tuesday and Tuesday night. Winds south-
southwest 10 to 15 knots Monday, becoming southwest around 10
knots Monday night, then west- southwest 10 to 15 knots Tuesday,
and west 5 to 10 knots Tuesday night.

Marine
Light southerly flow, below SCA values, tonight through
Saturday night. Isolated thunderstorms possible on the northern
part of the bay late tonight into Saturday and on all of the
waters Sunday.

Small craft advisories likely Monday as south winds increase
ahead of a cold front Monday night. Small craft advisories
possible Monday night and Tuesday with the frontal passage. No
marine hazards Tuesday night. Winds south 10 to 20 knots gusts
25 knots Monday, becoming southwest 10 knots Monday night, then
west- southwest 10 to 15 knots Tuesday, and west 10 knots
Tuesday night.

Tides/coastal flooding
Tidal anamolies are expected to decrease slightly over the next
several days as wind flow decreases. However, return of southerly
flow later today into the weekend will keep anamolies elevated.

Climate
Record highs/warm lows through the weekend:
washington dc...

Saturday 29 april... 91 (in 1974)/68 (in 1956)
Sunday 30 april... 92 (in 1942)/67 (in 1983)
bwi airport...

Saturday 29 april... 91 (in 1974)/67 (in 1956)
Sunday 30 april... 92 (in 1910)/63 (in 1983)
dulles airport..

Saturday 29 april... 87 (in 1996)/62 (in 1996)
Sunday 30 april... 86 (in 2007)/64 (in 1983)

Lwx watches/warnings/advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Update... Jackson
previous... Woody!/klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 9 mi53 min E 2.9 G 2.9 70°F 71°F1016.1 hPa
PPTM2 - 8578240 - Piney Point, MD 35 mi53 min SSE 6 G 7
SLIM2 - 8577330 - Solomons Island, MD 39 mi53 min E 7 G 8 67°F 64°F
LWTV2 - 8635750 - Lewisetta, VA 42 mi53 min S 7 G 9.9 73°F 69°F1017 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 44 mi53 min S 13 G 14 65°F 1017.7 hPa
WASD2 - 8594900 - Washington, DC 45 mi53 min Calm G 1.9 71°F 67°F1015.6 hPa
BSLM2 - Chesapeake Bay, MD 45 mi113 min SSE 2.9 68°F 1016 hPa65°F
44062 - Gooses Reef, MD 46 mi33 min SSE 12 G 14 65°F 1017.4 hPa
44042 - Potomac, MD 47 mi33 min S 7.8 G 9.7 68°F 1016.5 hPa

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fredericksburg, Shannon Airport, VA14 mi28 minS 810.00 miFair74°F68°F80%1015.9 hPa
Stafford, Stafford Regional Airport, VA18 mi28 minN 010.00 miFair63°F63°F100%1017.6 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi87 minN 010.00 miFair72°F68°F87%1016.9 hPa

Wind History from EZF (wind in knots)
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Last 24hrS7SW11
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SW5CalmCalmCalmCalmCalmE4NE4E3E8E5S7SW6S7S6S4SE3CalmCalmS3S9
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmSW4S7SW4SW13
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2 days agoN4NW6NW5NW3NW4NW4CalmNW5NW4NW4CalmCalmCalmW4CalmCalmCalmE6E4E4E3CalmCalmCalm

Tide / Current Tables for Hopyard Landing, Rappahannock River, Virginia
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Hopyard Landing
Click for Map
Sat -- 03:47 AM EDT     0.12 feet Low Tide
Sat -- 06:14 AM EDT     Sunrise
Sat -- 09:04 AM EDT     Moonrise
Sat -- 09:27 AM EDT     2.80 feet High Tide
Sat -- 04:41 PM EDT     -0.02 feet Low Tide
Sat -- 07:58 PM EDT     Sunset
Sat -- 10:12 PM EDT     2.40 feet High Tide
Sat -- 11:43 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40.90.50.20.10.411.82.52.82.72.41.81.30.80.40.100.311.72.22.42.3

Tide / Current Tables for Corbins Neck, Rappahannock River, Virginia
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Corbins Neck
Click for Map
Sat -- 04:15 AM EDT     0.13 feet Low Tide
Sat -- 06:14 AM EDT     Sunrise
Sat -- 09:05 AM EDT     Moonrise
Sat -- 09:32 AM EDT     3.58 feet High Tide
Sat -- 05:09 PM EDT     -0.02 feet Low Tide
Sat -- 07:58 PM EDT     Sunset
Sat -- 10:17 PM EDT     3.07 feet High Tide
Sat -- 11:43 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.30.80.40.10.30.9233.53.53.12.51.81.20.70.2-00.2122.73.13

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 Baltimore, MD/Washington (1,6,7,8)
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Ground Weather Radar Station Sterling, VA
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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.