Thursday, March23, 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 7:05AMSunset 7:26PM Thursday March 23, 2017 6:30 AM EDT (10:30 UTC) Moonrise 3:20AMMoonset 1:52PM Illumination 18% Phase: Waning Crescent; Moon at 25 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- 432 Am Edt Thu Mar 23 2017
.small craft advisory in effect Friday afternoon...
Rest of the overnight..N winds 5 kt. Waves less than 1 ft.
Today..SE winds around 5 kt. Waves 1 ft.
Tonight..S winds 5 kt. Waves less than 1 ft.
Fri..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Fri night..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds 5 to 10 kt. Waves 1 ft.
Sun..S winds 5 to 10 kt. Waves 1 ft. A chance of showers through the day...then showers likely through the night.
Mon..NE winds around 5 kt. Waves 1 ft. Showers likely in the morning...then a chance of showers through the night.
ANZ500 431 Am Edt Thu Mar 23 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build overhead this morning. The high will move offshore tonight, allowing a warm front to lift through the area on Friday. A low pressure system may approach the area Sunday. Small craft advisories may be necessary Friday night and Saturday.

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 230805
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
405 am edt Thu mar 23 2017

Synopsis
High pressure will build across the area today, and move
offshore tonight. A warm front will cross the region Friday.

Low pressure may affect the area Sunday.

Near term /until 6 pm this evening/
As of early this morning, high pressure was centered near
detroit. With the high not directly overhead yet, we have
struggled to decouple, so temperatures have not fallen quite as
much as they could have, given dew points in the single digits.

However, there are still a few more hours during which
temperatures can fall.

Over the course of today, high pressure will slide
southeastward across the area, with the center reaching the
atlantic coast near ocean city md by this evening. This should
allow winds to remain fairly light through the day. As the next
system approaches from the west, mostly clear skies this morning
may start to fill with high clouds, but they should be thin, and
sunshine should remain fairly plentiful through most of the day.

With the high overhead, mixing will be reduced compared to
yesterday, so even though temperatures aloft will warm, highs
should not be much different from yesterday's daytime
highs... Mainly in the 40s.

Short term /6 pm this evening through Saturday night/
Tricky forecast tonight into early Friday. Skies may be clear
enough early this evening for radiational cooling to bring
temperatures back below freezing in many areas. Then, southerly
winds and increasing clouds look likely to start temps on the
upward trend after midnight, with many areas likely to return
back above freezing by morning. However, a warm front will also
be approaching from the west, and some rain is possible
especially closer to the mason-dixon line. Guidance is not in
great agreement, but the canadian and european models do support
a period of light rain, while the NAM and GFS both are dry. With
temps possibly near or just below freezing at onset, a period of
freezing rain is possible overnight, most likely close to the
mason-dixon line and inland from the bay. Future shifts will
need to closely monitor this potential. Right now probability is
well below the 80% advisory criteria, so will just mention in
the hwo.

Otherwise, Friday will feature a significant warming as the warm
front crosses the area. Skies will feature plenty of clouds, but
southerly winds will become rather gusty, and temperatures
should warm through the 50s into the lower 60s in spots. Some
areas could even crack 70, but most places won't just yet.

Southerly flow will continue Friday night, keeping it much
milder than the previous few nights. Saturday will remain
relatively cloudy, but enough breaks of Sun are expected to
allow most places to soar into the 70s. This will be the first
widespread 70-degree day since march 9th. Records are in the
80s at dca and bwi, but only 76 at iad, so the latter is within
reach.

A backdoor cold front may try to drop back south on Saturday
night. Some guidance has backed off on this thought, which
would result in another mild night. Otherwise, an approaching
system may bring a few showers west, but generally dry weather
expected.

Long term /Sunday through Wednesday/
Low pressure currently over the great basin will slowly make
its way east across the country. The system is expected to be
cutoff and weakening/filling by the time it reaches the midwest
Saturday night per 00z ecmwf/gfs. Gulf moisture will stream
ahead of this system with rain over the area Sunday and Sunday
night. This looks to be a much better chance (likelies across
the cwa) for a soaking rain than the quick hitter mainly north
this Friday. Persistent warm/above normal conditions at least to
the middle of next week in continued southerly flow.

Aviation /08z Thursday through Monday/
Generally should beVFR through Saturday night. Biggest concern
right now, concentrated mainly on mrb, is a chance of some
freezing rain late tonight into early Friday. It will be a race
of warmer air moving in at the surface versus precip (if there
is some) moving in from the west. Not all guidance agrees on
there being precipitation at all, but if it is, it has a fair
shot of being freezing rain overnight in mrb. Further south and
east, the chance of precipitation is less and the chance of
temps warming up before it arrives is greater.

Winds will become southerly and a bit gust (20-25 knots) on
Friday, and remain gusty as they swing more southwesterly
Saturday.

An occluded or warm front looks to cross the area Sunday into
Monday with likely rain/potential for MVFR conds across the area
in southerly flow.

Marine
Winds will gradually diminsh over the bay early this morning as
high pressure builds overhead. SCA ends for all waters at 9am.

Winds should stay light through this evening. After that,
southerly flow up the bay should start to increase as a warm
front approaches, with SCA threat spreading up the bay overnight
and then to the adjacent waters during the day Friday. Winds may
diminish a bit overnight Friday but look likely to return to sca
levels on Saturday with continued south to southwest flow. With
the water still rather chilly, mixing will reduce gusts a bit
over the water, but still expect 20 knots or so especially near
shore.

Sly flow prevails Sunday into next week. Sly/sely channeling
into SCA levels possible at times through this time.

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

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 6 am to 6 pm edt Friday for anz530-
531-537-539-542-543.

Small craft advisory from noon to 6 pm edt Friday for anz535-
536-538.

Small craft advisory until 9 am edt this morning for
anz532>534-537-543.

Small craft advisory from midnight tonight to 6 pm edt Friday
for anz532>534-540-541.

Synopsis... Rcm
near term... Rcm
short term... Rcm
long term... Baj
aviation... Baj/rcm
marine... Baj/rcm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 9 mi42 min N 1 G 4.1 30°F 47°F1035.1 hPa
PPTM2 - 8578240 - Piney Point, MD 35 mi42 min ENE 4.1 G 5.1
LWTV2 - 8635750 - Lewisetta, VA 42 mi42 min NE 8.9 G 13 33°F 47°F1035.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 44 mi42 min ENE 12 G 16 30°F 1035.9 hPa
WASD2 - 8594900 - Washington, DC 45 mi42 min ENE 4.1 G 6 31°F 45°F1035.8 hPa
44062 - Gooses Reef, MD 46 mi30 min E 12 G 16 32°F 43°F2 ft1036 hPa (+2.3)
44042 - Potomac, MD 47 mi30 min NE 12 G 16 33°F 45°F1 ft1034.5 hPa (+1.9)

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fredericksburg, Shannon Airport, VA14 mi56 minNW 310.00 miFair27°F19°F71%1035.2 hPa
Stafford, Stafford Regional Airport, VA18 mi36 minN 010.00 miFair21°F13°F72%1036.9 hPa
Quantico Marine Corps Airfield - Turner Field, VA20 mi35 minVar 510.00 miFair34°F12°F40%1036.3 hPa

Wind History from EZF (wind in knots)
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N7N5N4N6N3N4CalmCalmN4CalmCalm
1 day agoN3CalmCalmCalmN6N8N5N8NW6N8N7N5CalmCalmCalmCalmCalmCalmCalmSW4CalmW3NW7N10
G20
2 days agoNW4CalmN6NW9N5NW4NW5CalmW3SW5SW3CalmS4CalmCalmSE3SE4CalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Hopyard Landing, Rappahannock River, Virginia
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Hopyard Landing
Click for Map
Thu -- 03:40 AM EDT     2.00 feet High Tide
Thu -- 04:19 AM EDT     Moonrise
Thu -- 07:07 AM EDT     Sunrise
Thu -- 09:41 AM EDT     0.34 feet Low Tide
Thu -- 02:52 PM EDT     Moonset
Thu -- 03:49 PM EDT     2.10 feet High Tide
Thu -- 07:24 PM EDT     Sunset
Thu -- 10:35 PM EDT     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.51.8221.81.40.90.60.40.30.50.91.41.82.12.11.91.61.20.80.50.40.3

Tide / Current Tables for Corbins Neck, Rappahannock River, Virginia
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Corbins Neck
Click for Map
Thu -- 03:48 AM EDT     2.57 feet High Tide
Thu -- 04:19 AM EDT     Moonrise
Thu -- 07:07 AM EDT     Sunrise
Thu -- 10:13 AM EDT     0.39 feet Low Tide
Thu -- 02:52 PM EDT     Moonset
Thu -- 03:58 PM EDT     2.71 feet High Tide
Thu -- 07:24 PM EDT     Sunset
Thu -- 11:05 PM EDT     0.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.72.22.52.62.41.91.40.90.50.40.50.91.62.22.62.72.62.21.71.20.70.50.4

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 (6,6,7,8)
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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.