Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Upper Marlboro, MD

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 7:17AMSunset 5:22PM Wednesday January 24, 2018 12:20 AM EST (05:20 UTC) Moonrise 11:34AMMoonset 12:00AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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- 931 Pm Est Tue Jan 23 2018
.small craft advisory in effect until 1 am est Wednesday...
.small craft advisory in effect from 6 am est Wednesday through Wednesday evening...
Rest of tonight..W winds 10 kt with gusts to 20 kt. Waves 2 ft.
Wed..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 to 2 ft.
Thu night..S winds around 5 kt. Waves flat.
Fri..S winds around 5 kt. Waves 1 ft or less.
Fri night..S winds 5 to 10 kt. Waves 1 ft.
Sat..S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain through the night.
Sun..SW winds 10 kt. Waves 1 ft. Rain likely through the day, then a chance of rain and snow showers through the night.
ANZ500 931 Pm Est Tue Jan 23 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build overhead through Thursday before moving offshore Friday and Saturday. Small craft advisories may need to be extended Wednesday night into Thursday.

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 240200
afdlwx
area forecast discussion
national weather service baltimore md washington dc
900 pm est Tue jan 23 2018

Synopsis
High pressure will build over the region through
Thursday night, then move offshore Friday. A cold front will
move through the area Sunday afternoon.

Near term through Wednesday
High pressure will continue to build into the great lakes and
midwest through Wednesday. A northwest flow ahead of the high
will usher in noticeably chillier conditions compared to recent
days... But it will be near slightly above climo for this time
of year. A sct to bkn stratocu deck is expected at times... But
there should still be a decent amount of sunshine Wednesday.

For locations along west of the allegheny front... An upslope
component to the low-level flow will cause snow showers through
Wednesday. The steadiest snow showers are expected through late
tonight while the subsidence inversion is higher and cold
advection is stronger. Accumulating snow is expected above 2000
feet... But snowfall accumulations are most likely to be below
advisory criteria. 1-3" of snow is most likely through late
tonight across these areas.

Short term Wednesday night through Thursday night
High pressure will remain in control through Thu night with more
seasonable temps. Light snow showers are expected to continue
over the appalachians Wed night before diminishing by thu
morning.

Long term Friday through Tuesday
Dry conditions expected for Friday as high pressure moves
offshore and winds become southerly. High temperatures will be
between the mid 40s and low 50s... And low temperatures Friday
night in the 30s.

Dry conditions expected again on Saturday as high pressure continues
to push east into the atlantic and warm advection increases. A
slight chance of showers is possible in the afternoon evening ahead
of a cold front, but looking more likely to the western part of our
cwa.

Pops increases Saturday into Sunday as cold front approaches from
the west and then moves through on Sunday. Guidance suggests
precipitation could last into Sunday night, therefore have to watch
temperatures for ptypes concerns, especially for higher elevations.

Dry conditions return sometime on Monday and into Tuesday with high
pressure in control of our area.

Aviation 02z Wednesday through Sunday
Winds will diminish a bit tonight due to the loss of
mixing... But more gusts from the northwest are expected
Wednesday around 20 knots.VFR conditions will prevail during
this time with a sct-bkn stratocu deck around 5kft.VFR
conditions are expected Wednesday night and Thursday with
lighterwinds as high pressure settles overhead.

Vfr conditions expected between Friday and Saturday with high
pressure moving south or near our area. Sub-vfr conditions
possible Saturday night into Sunday with cold front moving
through.

Marine
Winds are expected to diminish a bit tonight due to the loss of
mixing and weakening cold advection. However... A small craft
advisory remains in effect into the overnight hours for the
maryland chesapeake bay south of pooles island and the lower
tidal potomac river. Winds will pick back up again Wednesday due
to increased mixing and a weak pressure surge. A small craft
advisory is in effect for all of the waters during this time.

The SCA may need to be extended Wednesday night into Thursday.

Wind gusts will be below SCA criteria most times Friday into
Sunday. There might be short periods where SCA criteria might be
reached Saturday or Saturday night.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 1 am est Wednesday for anz531>534-
537-539>541-543.

Small craft advisory from 6 am to 7 pm est Wednesday for
anz530>543.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BSLM2 - Chesapeake Bay, MD 1 mi111 min W 4.1 47°F 1011 hPa29°F
TPLM2 - Thomas Point, MD 17 mi81 min W 9.9 G 11 47°F 34°F
WASD2 - 8594900 - Washington, DC 17 mi51 min WNW 7 G 12 47°F 36°F1011.8 hPa
APAM2 - 8575512 - Annapolis, MD 18 mi51 min 46°F 1010.5 hPa
CPVM2 22 mi51 min 47°F 26°F
44062 - Gooses Reef, MD 23 mi41 min NW 7.8 G 9.7 43°F 1011.9 hPa
FSNM2 31 mi51 min W 8.9 G 12 47°F 1010.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 31 mi51 min SW 7 G 8.9 46°F 1010.6 hPa
BLTM2 - 8574680 - Baltimore, MD 33 mi51 min NW 4.1 G 6 46°F 35°F1010.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 33 mi51 min NW 9.9 G 18 48°F 1012 hPa
SLIM2 - 8577330 - Solomons Island, MD 36 mi51 min NW 5.1 G 11 46°F 35°F1011.2 hPa
NCDV2 37 mi51 min W 1 G 1.9 44°F 38°F1011.1 hPa
CA2 - 8571892 - Cambridge, MD 38 mi51 min 45°F 36°F1011.9 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 38 mi51 min W 8 G 9.9 42°F 35°F1010.7 hPa
PPTM2 - 8578240 - Piney Point, MD 47 mi57 min WNW 8 G 8.9

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
Camp Springs / Andrews Air Force Base, MD8 mi25 minWNW 1310.00 miFair46°F26°F47%1011.8 hPa
College Park Airport, MD16 mi44 minW 6 G 1810.00 miFair46°F26°F47%1011.2 hPa
Washington/Reagan National Airport, DC, VA17 mi29 minWNW 710.00 miFair48°F27°F44%1011.9 hPa
Annapolis, United States Naval Academy, MD18 mi27 minW 510.00 miFair48°F28°F48%1011 hPa
Fort Meade / Tipton, MD20 mi45 minSW 710.00 miFair43°F28°F57%1011.8 hPa
Bay Bridge Field, MD24 mi46 minW 910.00 miFair45°F28°F53%1011.2 hPa

Wind History from ADW (wind in knots)
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Last 24hrS10S9SE10S12S16S14S18
G27
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S13SW11
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W10NW7NW6NW17
G26
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NW14NW10NW13W11W12NW13
1 day agoSW11S8S10SW8S6S6S3S4S5S9S7SW14SW10S13S15S10S12SE10SE8SE8SE8SE7S9S10
2 days agoNW3CalmCalmCalmCalmCalmCalmCalmCalmS4S4S6S8S8S5S9SE6SE7S5S7S9S12S11S11

Tide / Current Tables for Hills Bridge (Route 4), Patuxent River, Maryland
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Hills Bridge (Route 4)
Click for Map
Wed -- 05:05 AM EST     -0.59 feet Low Tide
Wed -- 07:18 AM EST     Sunrise
Wed -- 10:43 AM EST     1.96 feet High Tide
Wed -- 11:33 AM EST     Moonrise
Wed -- 05:19 PM EST     Sunset
Wed -- 05:20 PM EST     First Quarter
Wed -- 05:47 PM EST     0.00 feet Low Tide
Wed -- 10:50 PM EST     1.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40.90.4-0.1-0.5-0.6-0.500.71.41.91.91.71.410.60.20.100.20.61.21.61.8

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 12:43 AM EST     -0.00 knots Slack
Wed -- 04:08 AM EST     -0.73 knots Max Ebb
Wed -- 07:17 AM EST     0.00 knots Slack
Wed -- 07:17 AM EST     Sunrise
Wed -- 10:45 AM EST     0.86 knots Max Flood
Wed -- 11:31 AM EST     Moonrise
Wed -- 02:20 PM EST     -0.00 knots Slack
Wed -- 05:16 PM EST     -0.61 knots Max Ebb
Wed -- 05:17 PM EST     Sunset
Wed -- 05:20 PM EST     First Quarter
Wed -- 08:33 PM EST     0.00 knots Slack
Wed -- 11:02 PM EST     0.38 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.1-0.4-0.6-0.7-0.7-0.4-0.10.30.60.80.90.70.50.1-0.2-0.5-0.6-0.6-0.4-0.10.10.30.4

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 (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.