Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Forest Heights, MD

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 7:00AMSunset 7:26PM Saturday March 25, 2017 7:36 PM EDT (23:36 UTC) Moonrise 4:40AMMoonset 3:54PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 432 Pm Edt Sat Mar 25 2017
.small craft advisory in effect from 11 pm edt this evening through Sunday evening...
Rest of this afternoon..S winds 5 kt. Waves less than 1 ft.
Tonight..SE winds 5 to 10 kt. Gusts up to 20 kt in the late evening and overnight. Waves 1 ft. Patchy fog. Vsby 1 to 3 nm.
Sun..SE winds 5 to 10 kt with gusts to 25 kt. Waves 1 ft. A chance of rain. Areas of fog. Vsby 1 to 3 nm.
Sun night..SE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance of rain. Areas of fog.
Mon..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon night..SW winds around 5 kt. Waves 1 ft.
Tue..NW winds around 5 kt. Waves 1 ft. A chance of tstms. A chance of showers.
Wed..N winds 5 kt. Waves less than 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 432 Pm Edt Sat Mar 25 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain over bermuda through today. A backdoor cold front will pass through the area tonight before returning north as a warm front Monday. A cold front is expected to cross the chesapeake bay region Tuesday night. Small craft advisories are likely Sunday night through Monday. Another small craft advisory is possible Wednesday behind the cold front.

7 Day Forecast for Marine Location Near Forest Heights, MD
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location: 38.83, -77.03     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 251859
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
259 pm edt Sat mar 25 2017

Synopsis A backdoor cold front will move into the local area
this evening and stall just south of the area overnight and
Sunday before returning north as a warm front on Monday. Another
cold front will cross the area late Tuesday.

Near term /through Sunday night/ Backdoor cold front is
across south central pennsylvania and will push south rest of
today crossing the local area this evening. Some low topped
showers are possible in the vcnty of the frontal zone and across
the higher elevs due to some weak instability and sfc
convergence. Clouds thicken rapidly this evening with FROPA with
low clouds/cigs and some light rain especially northern areas
and along the western shore of the chesapeake due to onshore
flow. Cloudy and much cooler Sun due to cold air damming effects
and onshore flow. Light rain or drizzle in the morning then
tapering off as low level moisture erodes and CIGS lift. Much
better chance for showers Sun night in area of strong surface
and moisture convergence and warm air overrunning cool surface
air.

Short term /Monday through Monday night/ Front lifts north as
a warm front Mon afternoon with temperatures rising back into
the 70s. Area will be in a light westerly downslope flow leading
to some clearing. Risk of showers increases again late Mon night
and Tue as low pressure and associated cdfnt crosses the area.

Enough instability is also present on Tue for a risk of
t-storms. Drying expected late Tue night behind fropa.

Long term /Tuesday through Saturday/ Front approaches from
the west on Tuesday with showers and thunderstorms possible.

Conditions should start drying out early on Wednesday as high
pressure builds over our region. Dry conditions continue into
Thursday before a wave of low pressure moves through the mid-
atlantic increasing pops Thursday night and into Friday. Another
low pressure moves east towards the mid- atlantic Friday night
into Saturday keeping rainy conditions over our region.

Aviation /19z Saturday through Thursday/ Cigs will drop this
evening to ifr everywhere except at kcho and remain low through
18z Sun then lift to MVFR. Showers expected Sun night
everywhere.

Cold front approaches on Tuesday, then dry conditions return
Wednesday into Thursday. Sub-vfr periods possible Tuesday into
Tuesday night, thenVFR Wednesday into Thursday.

Marine Winds will strengthen across the upper chesapeake bay
late this evening behind backdoor front. Winds remain gusty
across the NRN waters and upper potomac river through sun. Winds
then increase again Sun night across the southern waters with
sca Mon and Mon night.

Cold front approaches on Tuesday, then dry conditions return
Wednesday into Thursday. Winds are expected to remain below the
small craft advisory threshold.

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

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 11 pm this evening to 9 pm edt
Sunday for anz530>532-535-538>540.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 3 mi49 min Calm G 1 72°F 47°F1020.2 hPa
BSLM2 - Chesapeake Bay, MD 17 mi127 min E 5.1 77°F 1020 hPa50°F
APAM2 - 8575512 - Annapolis, MD 31 mi49 min 64°F 1020.7 hPa
TPLM2 - Thomas Point, MD 32 mi37 min SSE 8.9 G 8.9 71°F 47°F52°F
NCDV2 35 mi49 min E 4.1 G 4.1 1020.1 hPa
CPVM2 36 mi49 min 69°F 52°F
FSNM2 38 mi49 min S 5.1 G 7 72°F 1020.8 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 38 mi49 min SE 2.9 G 4.1 66°F 1021 hPa
44062 - Gooses Reef, MD 38 mi37 min SSW 7.8 G 7.8 52°F 47°F1 ft1021.9 hPa (+0.6)
BLTM2 - 8574680 - Baltimore, MD 39 mi49 min SE 1 G 1.9 69°F 46°F1020.6 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 45 mi49 min S 9.9 G 11 58°F 1021.9 hPa
SLIM2 - 8577330 - Solomons Island, MD 47 mi49 min E 7 G 8 55°F 48°F
TCBM2 - 8573364 - Tolchester Beach, MD 49 mi49 min SE 2.9 G 4.1 71°F 47°F1021.2 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Washington/Reagan National Airport, DC, VA2 mi45 minENE 310.00 miOvercast72°F52°F50%1020.8 hPa
Camp Springs / Andrews Air Force Base, MD8 mi39 minESE 610.00 miOvercast73°F50°F46%1021.5 hPa
Fort Belvoir, VA11 mi39 minN 010.00 miOvercast76°F50°F41%1020.9 hPa
College Park Airport, MD12 mi56 minN 0 miOvercast72°F50°F47%1020.7 hPa
Fort Meade / Tipton, MD23 mi58 minE 510.00 miOvercast72°F50°F47%1021.7 hPa
Washington/Dulles International Airport, DC, VA24 mi45 minE 310.00 miOvercast71°F53°F53%1020.7 hPa

Wind History from DCA (wind in knots)
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Last 24hrS8S9S10S9S9S11S10S10S9S7S8S7S6S8S8S10S11S9S7S5CalmCalmCalmNE3
1 day agoS6SE6S8S11S11S8S13S8S11S11S12S16S10S12S12S10S5SW12
G18
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2 days agoN14N12N10N11N8N12NE9NE9NE7NE5E6NE6E6NE7NE5Calm33SE5S7S11E5S7S7

Tide / Current Tables for Bellevue, Potomac River, Washington, D.C.
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Bellevue
Click for Map
Sat -- 01:15 AM EDT     0.33 feet Low Tide
Sat -- 05:40 AM EDT     Moonrise
Sat -- 06:59 AM EDT     2.94 feet High Tide
Sat -- 07:03 AM EDT     Sunrise
Sat -- 01:33 PM EDT     0.27 feet Low Tide
Sat -- 04:54 PM EDT     Moonset
Sat -- 07:17 PM EDT     3.02 feet High Tide
Sat -- 07:25 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.30.40.91.72.42.82.92.72.21.610.60.30.30.71.42.32.832.92.51.91.3

Tide / Current Tables for Benning Bridge, D.C.
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Benning Bridge
Click for Map
Sat -- 01:28 AM EDT     0.32 feet Low Tide
Sat -- 05:40 AM EDT     Moonrise
Sat -- 07:03 AM EDT     Sunrise
Sat -- 07:14 AM EDT     3.11 feet High Tide
Sat -- 01:45 PM EDT     0.26 feet Low Tide
Sat -- 04:53 PM EDT     Moonset
Sat -- 07:25 PM EDT     Sunset
Sat -- 07:31 PM EDT     3.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.40.81.62.42.93.132.51.81.20.70.40.30.61.32.22.83.23.22.82.11.5

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 (19,4,5,8)
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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.