Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Upper Marlboro, MD

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 5:44AMSunset 8:25PM Saturday May 27, 2017 7:48 AM EDT (11:48 UTC) Moonrise 6:42AMMoonset 9:28PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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ANZ532 Chesapeake Bay From Sandy Point To North Beach- 731 Am Edt Sat May 27 2017
Today..NE winds 5 kt. Waves less than 1 ft. Scattered showers this morning, then numerous showers and tstms this afternoon.
Tonight..NE winds 5 to 10 kt. Waves 1 ft. Scattered showers.
Sun..SE winds 5 to 10 kt. Waves 1 ft.
Sun night..SE winds 10 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.
Mon..S winds 5 kt. Waves less than 1 ft. A chance of showers.
Mon night..W winds 5 kt. Waves flat.
Tue..W winds 5 kt. Waves less than 1 ft.
Wed..W winds 5 to 10 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 731 Am Edt Sat May 27 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move off the mid-atlantic coast today while a warm front lifts into the area. The front will stall out near the waters through Sunday before a cold front moves into the area Monday. The boundary will stall south of the waters for Tuesday and Wednesday.

7 Day Forecast for Marine Location Near Upper Marlboro, MD
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location: 38.8, -76.72     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 271142
afdlwx
area forecast discussion
national weather service baltimore md washington dc
742 am edt Sat may 27 2017

Synopsis
High pressure overhead this morning will move
offshore later today. A wave of low pressure will move across
the area this afternoon or evening pushing a weak front south
of the area late tonight. A stronger cold front will move
through the area Monday. High pressure will return to the area
mid next week.

Near term through tonight
Weakening t-storm complex over SW pa this morning is associated
with a low pressure system over ohio. Weakening showers will
move across northern portions of the CWA through the rest of the
morning. The low pres center will move east across the area
this afternoon or this evening and will set up a warm front
across the southern half of the fcst area. Nssl wrf- arw and
instability fcst fields from different models indicate the area
from augusta county south and east through charlottesville will
be the prime area for strong potentially severe convective
development later this afternoon and early this evening.

Damaging winds and large hail appear to be the main threat.

0-6km flow around 30kt should keep storms moving with flash
flooding risk low despite saturated soils and potential training
convection. The low pres system and associated front will push
south of the area later tonight with showers ending.

Short term Sunday through Monday night
Sunday will likely start out quiet, but with plenty of low
clouds. Low pressure will be tracking from the mid-ms valley to
southwest ontario by late Sunday night. A sfc trof will
establish across the area during the afternoon with pwats
increasing over 1.5 inches. Widespread convection appears likely
sun afternoon and evening with potential for flash flooding
especially west of the blue ridge given saturated soils.

Convection begins to weaken and shift east late Sun night due to
loss heating and sfc trof shifting east. Convection could
redevelop east of the blue ridge Mon afternoon with actual
frontal passage.

Long term Tuesday through Friday
Upper level low pressure will be slowly moving across ontario and
quebec during the Tuesday through Thursday time frame. While overall
flow will be from the SW to W aloft, there will still be
opportunities for shortwave troughs to dive through the area. It
does appear there will be two additional boundaries following
Monday's front that will drop southeast through the middle of the
week. The second (likely late Wednesday or Thursday looks to be the
stronger of the two in terms of airmass change. While this pattern
is a little unsettled, rain chances should be scattered and
instability for thunderstorms limited.

Ensemble spread increases toward the end of the weak regarding the
upper air pattern and evolution of the closed low. However, there
should be a dry period at some point as surface high pressure builds
into the area behind the cold front.

Above normal temperatures on Tuesday will decrease through the
remainder of the week behind the frontal passages. Highs will settle
into the 70s with lows in the 50s, which is near normal.

Aviation 12z Saturday through Wednesday
Vfr conditions become MVFR in morning showers for dc metros and
north. Kcho is most vulnerable to t-storms today with brief
MVFR ifr conditions possible. Widespread convection Sun evening
with flying restrictions likely.

Overall Tuesday and Wednesday should beVFR, but there could be some
scattered showers and perhaps a thunderstorm as weak fronts move
through the area.

Marine
Light and variable flow this morning becoming south as weak low
pressure approaches through the day. The weak low crosses the
va part of the chesapeake bay this evening with more variable
flow becoming nely overnight.

Flow becomes southerly Sunday with a weak cold front moving
through the waters Monday memorial day.

Winds are forecast to remain below SCA criteria Tuesday and
Wednesday, although a cold front on Wednesday could lead to slightly
higher winds.

Tides coastal flooding
Elevated water levels continue from recent onshore flow. The
immediate dc area will see minor flooding with the preferred
high tide mid-morning and an advisory is out through midday.

Weak low pressure crosses the chesapeake bay this evening with
light southerly flow this afternoon and again Sunday.

Elevated water levels persist through the rest of the holiday
weekend with straits point in st. Marys county being the most
susceptible to minor flooding, particularly on the preferred
high tide.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Baj lfr
near term... Baj lfr
short term... Lfr
long term... Ads
aviation... Baj ads lfr
marine... Baj ads lfr
tides coastal flooding... Baj


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TPLM2 - Thomas Point, MD 17 mi49 min S 1.9 G 1.9 64°F 64°F
WASD2 - 8594900 - Washington, DC 17 mi49 min Calm G 0 64°F 68°F1012.4 hPa (-0.4)
APAM2 - 8575512 - Annapolis, MD 18 mi49 min 67°F 1012.3 hPa (-0.3)
44063 - Annapolis 18 mi39 min WNW 1.9 G 3.9 65°F 1012.7 hPa
CPVM2 22 mi49 min 64°F 58°F
44062 - Gooses Reef, MD 23 mi39 min SSW 3.9 G 5.8 66°F 1013.1 hPa
44043 - Patapsco, MD 30 mi39 min WSW 3.9 G 3.9 63°F 1013.2 hPa
FSNM2 31 mi49 min NNW 1.9 G 2.9 64°F 1012.4 hPa (+0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 31 mi49 min WSW 1.9 G 1.9 63°F 1012.6 hPa (+0.0)
BLTM2 - 8574680 - Baltimore, MD 33 mi49 min W 1.9 G 2.9 63°F 67°F1012.4 hPa (-0.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 33 mi49 min SW 1.9 G 2.9 65°F 1013.6 hPa (+0.0)
SLIM2 - 8577330 - Solomons Island, MD 36 mi49 min SE 1.9 G 2.9 65°F 67°F
NCDV2 37 mi49 min S 1 G 5.1 63°F 68°F1011.8 hPa (-0.8)
TCBM2 - 8573364 - Tolchester Beach, MD 38 mi49 min Calm G 1 64°F 65°F1012.9 hPa (+0.0)
CA2 - 8571892 - Cambridge, MD 38 mi49 min 66°F 68°F
PPTM2 - 8578240 - Piney Point, MD 47 mi49 min SE 4.1 G 4.1

Wind History for Washington, DC
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SW4
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Camp Springs / Andrews Air Force Base, MD8 mi1.8 hrsSSE 410.00 miA Few Clouds56°F54°F93%1013.1 hPa
College Park Airport, MD16 mi56 minN 010.00 miFair58°F56°F93%1012.9 hPa
Washington/Reagan National Airport, DC, VA17 mi57 minWSW 310.00 miMostly Cloudy63°F60°F90%1013 hPa
Annapolis, United States Naval Academy, MD18 mi55 minN 010.00 miFair64°F57°F81%1012.7 hPa
Fort Meade / Tipton, MD20 mi58 minW 37.00 miFair54°F53°F100%1013.9 hPa
Bay Bridge Field, MD24 mi59 minN 010.00 miFair63°F57°F83%1012.5 hPa

Wind History from ADW (wind in knots)
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Last 24hrSW9W9W10W11W10
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NW6NW4CalmCalmCalmCalmCalmCalmW3CalmS4Calm
1 day agoNE5E3W6SW9SW9S10SW8SW7SE7S5SW29
G39
S7W10SW5W5W6W8SW4W6W8W7W7SW7SW6
2 days agoN4NE5N6N3E6E8E7SE9E8E7SE7E6E8E12
G19
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G21
E10SE8

Tide / Current Tables for Hills Bridge (Route 4), Patuxent River, Maryland
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Hills Bridge (Route 4)
Click for Map
Sat -- 01:11 AM EDT     0.40 feet Low Tide
Sat -- 05:45 AM EDT     Sunrise
Sat -- 07:21 AM EDT     4.69 feet High Tide
Sat -- 07:42 AM EDT     Moonrise
Sat -- 03:14 PM EDT     0.58 feet Low Tide
Sat -- 07:48 PM EDT     2.79 feet High Tide
Sat -- 08:22 PM EDT     Sunset
Sat -- 10:28 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.51.12.13.24.24.74.64.23.52.821.40.80.60.71.322.62.82.62.11.5

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sat -- 12:22 AM EDT     -0.75 knots Max Ebb
Sat -- 03:02 AM EDT     0.00 knots Slack
Sat -- 05:43 AM EDT     Sunrise
Sat -- 06:45 AM EDT     1.33 knots Max Flood
Sat -- 07:40 AM EDT     Moonrise
Sat -- 10:13 AM EDT     -0.00 knots Slack
Sat -- 01:32 PM EDT     -1.23 knots Max Ebb
Sat -- 05:12 PM EDT     0.00 knots Slack
Sat -- 07:42 PM EDT     0.62 knots Max Flood
Sat -- 08:21 PM EDT     Sunset
Sat -- 10:21 PM EDT     -0.00 knots Slack
Sat -- 10:27 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.7-0.4-00.511.31.31.10.70.1-0.4-0.9-1.2-1.2-1-0.6-0.10.30.60.60.40.1-0.2

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 (7,2,3,4)
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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.