Monday, March27, 2017 L-36.com


Marine Weather and Tides
Alexandria, 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 6:57AMSunset 7:28PM Monday March 27, 2017 12:48 AM EDT (04:48 UTC) Moonrise 5:54AMMoonset 6:08PM Illumination 0% Phase: New Moon; 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 Pm Edt Sun Mar 26 2017
Rest of tonight..SE winds 5 to 10 kt. Waves 1 ft. A chance of rain with patchy drizzle. Patchy fog with vsby 1 to 3 nm.
Mon..SW winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms.
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.
Wed night..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.
Fri..NE winds 5 to 10 kt. Waves 1 ft. Showers likely. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm 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 overnight before returning north as a warm front Monday morning. 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 Alexandria, VA
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location: 38.83, -77.04     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 270112
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
912 pm edt Sun mar 26 2017

Synopsis
A front will remain stationary across the area through this
evening then return as a warm front early Monday. Another cold
front will cross the area late Tuesday. High pressure will build
over the region Thursday.

Near term /through Monday/
A warm front is stretched from lake erie to central va this
evening. Easterly flow persists across the mid-atlantic and low
stratus and patchy drizzle will continue. Light rain has broken
out across the central foothills from southerly flow aloft
overrunning the frontal boundary in place. Another area of rain
will move e-ne across the highlands tonight. Hi-res guidance
keeps steady rain west of the blue ridge and across northern md
into Monday morning however on-off rain and drizzle are likely
further east into Monday morning.

The warm front will likely stay stationary overnight since low-
level flow is light. Temps will stay steady overnight. Patchy
fog is also possible across the dc and baltimore metros into
Monday morning.

The warm front will clear from south to north Monday morning.

Low clouds and patchy fog will last the longest across northeast
maryland Monday morning. Temps will soar back into the 70s
across much of the area by afternoon.

A weak convergence zone will exist/remain and combined with
some instability could be enough for scattered showers and an
isolated thunderstorm.

Short term /Monday night through Tuesday night/
Better forcing and moisture spreads across the area late mon
night and Tue with approach of low pressure and associated cdfnt
for better coverage of showers and thunderstorms.

Long term /Wednesday through Sunday/
Long term period starts dry as high pressure builds over our
region Wednesday into Thursday with high temperatures in the 50s
and 60s. Conditions will deteriorate Thursday night into Friday
as a low pressure system tracks east-northeast from missouri to
near lake erie. Its associated warm front will stay south of
the mid-atlantic into Friday before lifting Friday night. Low
pressure develops near or off of the DELMARVA peninsula Friday
night into Saturday as unsettled conditions continue over our
region. Conditions improve during the day on Saturday as low
pressure moves away from the coast. Dry conditions continue into
Sunday.

Aviation /01z Monday through Friday/
Ifr/lifr conditions tonight with cigs/vsbys improving to
MVFR/vfr mon. Ra/dz is possible at terminals overnight into
Monday. Shra/vcts possible Monday afternoon. Showers and
possible t-storms expected again on tue.

Dry/vfr conditions expected for Wednesday and Thursday before
rain approaches the area Thursday night, possibly bringing sub-
vfr conditions over the terminals into Friday.

Marine
Winds are expected to increase tonight across the southern
waters and SCA is in effect through Monday. Southerly winds will
weaken Monday night. Low pressure and a cold front will impact
the waters Tuesday and Tuesday night. SCA is likely during this
time.

Dry conditions expected for Wednesday and Thursday before rain
approaches the area Thursday night, bringing showers over the
waters into Friday. Wind gusts will be near the small craft
advisory threshold during parts of this period... Therefore sca
possible at times.

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

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 6 pm edt Monday for anz533-534-537-
541>543.

Synopsis... Lfr
near term... Hsk/lfr
short term... Lfr
long term... Imr
aviation... Hsk/imr/lfr
marine... Hsk/imr/lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 3 mi49 min E 4.1 G 6 46°F 48°F1022.7 hPa (-1.1)
APAM2 - 8575512 - Annapolis, MD 32 mi49 min 45°F 1023.3 hPa (-0.8)
TPLM2 - Thomas Point, MD 32 mi49 min E 6 G 7 44°F 45°F44°F
NCDV2 35 mi49 min E 6 G 7 48°F 51°F1022.2 hPa (-0.7)
CPVM2 36 mi49 min 45°F 45°F
FSNM2 38 mi49 min E 9.9 G 12 44°F 1023.2 hPa (-1.2)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 38 mi49 min E 8 G 9.9 44°F 1023.8 hPa (-1.2)
44062 - Gooses Reef, MD 38 mi39 min E 5.8 G 5.8 45°F 1024 hPa
BLTM2 - 8574680 - Baltimore, MD 39 mi49 min ESE 6 G 8.9 44°F 47°F1023.4 hPa (-1.2)
COVM2 - 8577018 - Cove Point LNG Pier, MD 46 mi49 min ESE 5.1 G 6 45°F 1023.8 hPa (-0.8)
SLIM2 - 8577330 - Solomons Island, MD 47 mi49 min ENE 4.1 G 5.1 46°F 47°F

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Washington/Reagan National Airport, DC, VA2 mi57 minE 95.00 miLight Drizzle Fog/Mist47°F46°F97%1023.3 hPa
Camp Springs / Andrews Air Force Base, MD9 mi51 minE 50.75 miFog/Mist45°F44°F100%1023.8 hPa
Fort Belvoir, VA10 mi1.8 hrsN 06.00 miFog/Mist47°F45°F94%1024 hPa
College Park Airport, MD12 mi68 minE 33.00 miOvercast45°F42°F93%1023.4 hPa
Fort Meade / Tipton, MD23 mi70 minE 42.50 miOvercast43°F42°F100%1024.7 hPa
Washington/Dulles International Airport, DC, VA24 mi57 minESE 61.00 miLight Drizzle Fog/Mist46°F45°F96%1022.7 hPa

Wind History from DCA (wind in knots)
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Last 24hrE9E13E14
G20
E11E14E13E9E13E11E11E10E10E8E10E9E11E8E10E10E9E8E8E6E9
1 day agoS11S10S10S9S7S8S7S6S8S8S10S11S9S7S5CalmCalmCalmNE3E8SE10S7S7NE19
2 days agoS8S13S8S11S11S12S16S10S12S12S10S5SW12
G18
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S18S17S9S8S9S10S9S9

Tide / Current Tables for Bellevue, Potomac River, Washington, D.C.
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Bellevue
Click for Map
Mon -- 02:51 AM EDT     0.14 feet Low Tide
Mon -- 06:54 AM EDT     Moonrise
Mon -- 07:00 AM EDT     Sunrise
Mon -- 08:27 AM EDT     3.25 feet High Tide
Mon -- 03:20 PM EDT     0.05 feet Low Tide
Mon -- 07:07 PM EDT     Moonset
Mon -- 07:27 PM EDT     Sunset
Mon -- 08:52 PM EDT     3.19 feet High Tide
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.60.30.10.41.22.22.93.23.22.82.11.40.80.40.10.10.71.72.533.22.92.3

Tide / Current Tables for Benning Bridge, D.C.
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Benning Bridge
Click for Map
Mon -- 03:03 AM EDT     0.13 feet Low Tide
Mon -- 06:53 AM EDT     Moonrise
Mon -- 06:59 AM EDT     Sunrise
Mon -- 08:41 AM EDT     3.43 feet High Tide
Mon -- 03:32 PM EDT     0.04 feet Low Tide
Mon -- 07:07 PM EDT     Moonset
Mon -- 07:27 PM EDT     Sunset
Mon -- 09:06 PM EDT     3.37 feet High Tide
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.70.30.10.312.12.93.33.432.41.610.40.10.10.61.52.53.13.43.22.6

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 (0,6,7,8)
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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.