Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Shenandoah Farms, 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 7:03AMSunset 7:32PM Sunday March 26, 2017 12:48 PM EDT (16:48 UTC) Moonrise 5:22AMMoonset 5:04PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 1031 Am Edt Sun Mar 26 2017
.small craft advisory in effect until 9 pm edt this evening...
Rest of today..E winds 15 kt with gusts to 20 kt. Waves 1 ft.
Tonight..SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Patchy drizzle with a chance of rain.
Mon..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Tue..SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.
Tue night..NW winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds around 5 kt. Waves 1 ft. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Am Edt Sun Mar 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A front will remain stationary just south of the waters through this evening before returning north as a warm front late tonight and Monday. A cold front is expected to cross the chesapeake bay region Tuesday night. Small craft advisories are possible Tuesday night and Wednesday behind the cold front.

7 Day Forecast for Marine Location Near Shenandoah Farms, VA
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location: 39.01, -78.02     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 261422 aaa
afdlwx
area forecast discussion... Updated
national weather service baltimore md/washington dc
1022 am edt Sun mar 26 2017

Synopsis
A front will remain stationary across the area through this
evening before returning as a warm front late tonight and
Monday. Another cold front will cross the area late Tuesday.

High pressure will build over the region Thursday.

Near term /through tonight/
Backdoor front has cleared the entire fcst area with cad
wedge and associated low clouds well in place. Mid-level
subsidence/dry air aloft will remain in place through most of
the day with just some very light rain or drizzle the main
p-type across the area. The exception will be over the far
west/southwest part of the area where deeper moisture will
result in some light rain/qpf amounts.

Clouds thicken everywhere tonight with ra/showers expected as
front begins to retreat to the north. Pops categorical west of
the blue ridge and likely east.

Short term /Monday through Tuesday night/
A second low currently along the co/nm border will reach the midwest
late Monday before tracking across the northern mid-atlantic Tuesday
per 00z ecmwf/gfs. Continued moist southwesterly flow warrants high
chance pops with slight chance for thunder for the lwx CWA Monday.

Better chance for thunderstorms looks to be Tuesday on the south
side of the low crossing the region.

The cold front trailing this low enters the area Tuesday night
bringing in a brief stretch of quiet weather under high
pressure.

Long term /Wednesday through Saturday/
The first part of the forecast will be dominated by an induced
upper ridge over the mid atlantic in-between low pressure east
of nova scotia and a developing low across the central us. The
middle part of the week will be dry. Highs Wednesday in the 60s.

Lows Wednesday night 35-40. Thursday should see quite a bit of
sunshine with highs in the lower 60s.

Conditions will deteriorate Thursday night as the aforementioned
low tracks into missouri to near lake erie Friday. The
attendant warm front will hang south of the mid atlantic through
Friday. This will bring cooler temperatures to the region,
cloudy skies, and likely pops.

Low pressure may develop along the virginia coast Friday night
keeping the forecast area on the cloudy and wet side through
Saturday.

Aviation /14z Sunday through Thursday/
Onshore flow across the area generally 10 to 15 knots through
tonight. Drizzle and ifr conds expected to develop through the
daylight hours today with ceilings slow to lift tonight.

Southwesterly flow from low pressure to the west/north Monday and
Tuesday brings rain showers and thunderstorms to the dc metros
with the better thunder threat Tuesday afternoon.

Vfr conditions wedensday and Thursday. Clouds will thicken
Thursday nght.

Marine
Onshore flow 15 to 20 knots continues through tonight before
shifting south Monday.

Generally sub-sca swly flow prevails Monday and Tuesday with thunder
chances Tuesday. Cold front crosses the area Tuesday night with sca
likely across the area in nwly flow.

High pressure will build into the waters for midweek. No
problems expected on the waters Wednesday/Thursday.

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

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 9 pm edt this evening for
anz530>533-535-536-538>542.

Update... Lfr
products... Baj/woody!


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 54 mi55 min ENE 4.1 G 8.9 47°F 48°F1027.4 hPa
BSLM2 - Chesapeake Bay, MD 71 mi139 min E 5.1 46°F 1027 hPa43°F
BLTM2 - 8574680 - Baltimore, MD 78 mi49 min ESE 6 G 9.9 46°F 47°F1028.2 hPa (+0.6)

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Winchester Regional, VA12 mi54 minE 67.00 miOvercast45°F41°F87%1026.1 hPa
Leesburg / Godfrey, VA24 mi54 minSE 77.00 miOvercast50°F46°F88%1027.4 hPa

Wind History from OKV (wind in knots)
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Last 24hrW5CalmNW5NW5NW3CalmCalmCalmE3CalmCalmCalmN4NE4E7NE7NE4E9E5E10E8E8E4E4
1 day agoSW8SW8S8S10S8S8S6S5SW3SW8SW7SW11
G16
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SW9SW7SW9SW7SW8SW7SW6SW6SW6S7
2 days agoS5CalmS5SE5E3SE7SE6SE4SE4CalmS4S6S6S5S5S6S4S6S4CalmS5SW6SW8
G14
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G15

Tide / Current Tables for Chain Bridge, D.C.
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Chain Bridge
Click for Map
Sun -- 02:22 AM EDT     0.21 feet Low Tide
Sun -- 06:18 AM EDT     Moonrise
Sun -- 07:02 AM EDT     Sunrise
Sun -- 08:02 AM EDT     3.15 feet High Tide
Sun -- 02:46 PM EDT     0.14 feet Low Tide
Sun -- 06:00 PM EDT     Moonset
Sun -- 07:26 PM EDT     Sunset
Sun -- 08:23 PM EDT     3.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.50.20.30.81.72.533.132.41.71.10.60.20.10.51.32.22.83.13.12.72

Tide / Current Tables for Chain Bridge, Washington, D.C.
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Chain Bridge
Click for Map
Sun -- 02:25 AM EDT     0.23 feet Low Tide
Sun -- 06:18 AM EDT     Moonrise
Sun -- 07:02 AM EDT     Sunrise
Sun -- 08:03 AM EDT     3.09 feet High Tide
Sun -- 02:48 PM EDT     0.16 feet Low Tide
Sun -- 06:00 PM EDT     Moonset
Sun -- 07:26 PM EDT     Sunset
Sun -- 08:25 PM EDT     3.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.50.30.30.81.62.42.93.12.92.41.71.10.60.30.20.51.22.12.83.132.62

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 (12,3,4,5)
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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.