Monday, October22, 2018 L-36.com


Marine Weather and Tides
Upper Marlboro, MD

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:23AMSunset 6:20PM Monday October 22, 2018 4:06 AM EDT (08:06 UTC) Moonrise 4:42PMMoonset 4:02AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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- 135 Am Edt Mon Oct 22 2018
.small craft advisory in effect until 6 am edt early this morning...
.small craft advisory in effect from this evening through late tonight...
Overnight..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon..SW winds 5 to 10 kt. Waves 1 to 2 ft.
Mon night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Tue..W winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft.
Tue night..NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Wed..NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Wed night..NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Thu..N winds 10 to 15 kt. Waves 1 to 2 ft.
Fri..E winds 5 to 10 kt. Waves 1 ft.
ANZ500 135 Am Edt Mon Oct 22 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the water through Monday. A cold front approaching from the great lakes will cross the waters Tuesday, followed by another area of high pressure Wednesday into Thursday. Small craft advisories will likely be needed Tuesday night through 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 220754
afdlwx
area forecast discussion
national weather service baltimore md washington dc
354 am edt Mon oct 22 2018

Synopsis
High pressure will move across the area today then push offshore
tonight. A cold front, approaching from the great lakes, will
cross the region Tuesday. A second area of high pressure will
develop and persist through the second half of the week. Low
pressure may approach the area from the southeastern u.S. Or
tennessee valley by next weekend.

Near term until 6 pm this evening
Clear skies and great radiational cooling will lead to some
areas of frost and other areas of freezing temperatures early
this morning. Temperatures will bottom out in the 30s areawide,
except where the growing season has already ended... Where we
have some patches of frost. Temperatures in these areas will
drop into the 20s.

High pressure will slide offshore this afternoon. A moderating
trend in temperatures are expected to begin this afternoon.

High temperatures will reach the 50s, with perhaps some increase
in mid- upper level cloud cover.

Short term 6 pm this evening through Wednesday night
High pressure to the east will have a big influence this
evening and overnight with low temperatures dropping into the
40s.

A cold front will drop southeastward through Tuesday. The
atmosphere will be too dry to produce any precipitation. Mostly
clear and cool Tuesday night.

Breezy northwest winds will continue ushering in a reinforcing
shot of cool air Wednesday into Wednesday night as high
pressure builds toward the mid-atlantic from the great lakes.

Long term Thursday through Sunday
On Thursday, high pressure will continue to be in place over the
region as a weak upper level ridge move to the north. Skies will
remain mostly clear with winds continuing out of the north. Dry
conditions expected with only light winds. Daytime temperatures will
continue to be below average in the upper 30s to upper 40s.

Overnight temperatures Thursday into Friday, will be chilly in the
upper 20 and into the 30s.

Friday into Saturday, the upper level ridge to the north will
start to break down as a upper level trough builds into the
tennessee river valley and the smokey mountains. A broad upper
level trough will be positioned over eastern canada and northern
maine. The upper level trough over tennessee and kentucky is
forecast to broaden and expand further southward into
mississippi and alabama. This will lead to a tapping of the warm
and moist air from the gulf mexico. The models are pointing to
a low pressure system forming over the gulf of mexico on
Thursday and moving east to northeastward toward florida and
georgia early on Friday. This low pressure system is expected to
get caught up on the east side of the upper level trough and
move northward along the eastern sea board. Both the 00z GFS and
euro agree that a coastal storm will form and move northward
along the east coast. The GFS takes the upper level trough and
kicks it eastward forcing the coastal storm further off the
coast while the euro keep the trough further inland over
arkansas and tennessee. The euro is wetter and faster than the
gfs. The euro brings the coastal storm northward and moves
precipitation into our region by 18z (2pm) on Friday. The gfs
brings the outer bands of precipitation into the region around
6z (2am) Saturday morning and remains further off the coast
leading to lesser rain event. Both models agree that some
semblances of precipitation will likely occur on Saturday with
there being a chance for precipitation starting sometime late
Friday afternoon into evening. The 1000 to 500mb thicknesses
seem to indicate that this weather event should be mainly a rain
event with some snow potential late Saturday into Sunday for
the higher elevation areas. A slight warm up will occur Friday
into Saturday as winds become more southerly.

Sunday, the coastal storm will shift further northeastward out of
our area. Some lingerings rain and snow showers over the higher
elevations will be possible on Sunday. The GFS tries to bring a
secondary cold front Sunday afternoon while the euro tries to keep
this boundary mainly dry. Winds will depend on the position of the
coastal low but they should be mainly out of the east to southeast.

Aviation 08z Monday through Friday
Vfr conditions expected for the next few days as high pressure
passes overhead and a dry cold front crosses the terminals
Tuesday.

A southerly flow will develop today into tonight with high
pressure pushing to the east.

Winds will turn west again on Tuesday as a cold front crosses
the terminals. However, moisture is shallow. While there should
be a period of ceilings late Tuesday, those CIGS should still be
vfr.

MainlyVFR Wed and Wed night in a northwest flow.

On Thursday, high pressure will continue to be in place over the
region. Winds will be out of the north. Skies will be mostly clear
withVFR conditions expected.

Friday, winds will slowly become southerly but remain light. Skies
will be mostly clear to start the day but cloud cover will increase
into the afternoon periods. Rain will potential late Friday
afternoon into evening for central virginia.VFR conditions expected.

Marine
Winds will gradually diminish early today and become light this
afternoon.

In the wake of the departing high, guidance attempting to mix
some 20 kt gusts due to southerly channeling in the main channel
of the bay. A small craft advisory has been issued for tonight.

Better mixing opportunity for small craft advisory conditions
comes late Tuesday in the wake of a passing cold front. Gusty
nw winds of 20 to 30 knots are likely through Wednesday behind
this front.

Light winds out of the north with mostly clear skies on Thursday.

On Friday, winds will be southerly with increasing clouds. Rain will
be possible late Friday afternoon into evening for the southern
chesapeake bay areas.

Tides coastal flooding
Water levels should begin to gradually recover to near
astronomical norms by Tuesday. Water will slosh back up the bay
when winds go light today. While this is not expected to cause
any flooding issues, anomalies could oscillate to near or a
little above astro norms quicker than currently forecast.

Lwx watches warnings advisories
Dc... Frost advisory until 10 am edt this morning for dcz001.

Md... Freeze warning until 10 am edt this morning for mdz003-004-503.

Frost advisory until 10 am edt this morning for mdz005-006-011-
013-014-016>018-504>508.

Va... Freeze warning until 10 am edt this morning for vaz025-036>040-
050>052-055-056-501-502-505>508.

Frost advisory until 10 am edt this morning for vaz053-054-057.

Wv... None.

Marine... Small craft advisory until 6 am edt early this morning for
anz532>534-537-540-541-543.

Small craft advisory from 6 pm this evening to 6 am edt
Tuesday for anz531>534-537-539>543.

Synopsis... Klw
near term... Klw
short term... Klw
long term... Jmg
aviation... Klw jmg
marine... Klw jmg
tides coastal flooding... Klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BSLM2 - Chesapeake Bay, MD 1 mi97 min Calm 38°F 1026 hPa33°F
TPLM2 - Thomas Point, MD 17 mi67 min WNW 13 G 17 44°F 63°F1026.2 hPa (+0.9)33°F
WASD2 - 8594900 - Washington, DC 17 mi37 min WNW 1.9 G 2.9 42°F 59°F1026.1 hPa
APAM2 - 8575512 - Annapolis, MD 18 mi37 min 41°F 1025.1 hPa
44063 - Annapolis 19 mi31 min NW 7.8 G 12 44°F 1025.9 hPa
CPVM2 22 mi37 min 44°F 34°F
44062 - Gooses Reef, MD 23 mi37 min Calm 48°F 1025.8 hPa
FSNM2 31 mi37 min WNW 9.9 G 13 42°F 1024.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 31 mi37 min WNW 9.9 G 11 43°F 1025.3 hPa
BLTM2 - 8574680 - Baltimore, MD 33 mi37 min WNW 2.9 G 7 42°F 67°F1025.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 33 mi37 min NNW 12 G 18 45°F 1026 hPa
SLIM2 - 8577330 - Solomons Island, MD 36 mi37 min NNW 8 G 12 44°F 63°F1025.4 hPa
NCDV2 37 mi37 min NNW 2.9 G 4.1 38°F 58°F1025.3 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 38 mi37 min WNW 14 G 16 45°F 58°F1025.3 hPa
CA2 - 8571892 - Cambridge, MD 38 mi37 min 45°F 60°F1026.2 hPa
PPTM2 - 8578240 - Piney Point, MD 47 mi43 min N 8.9 G 9.9

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Camp Springs / Andrews Air Force Base, MD8 mi71 minN 010.00 miFair35°F30°F84%1026.2 hPa
College Park Airport, MD16 mi85 minN 010.00 miFair35°F32°F91%1025.4 hPa
Washington/Reagan National Airport, DC, VA17 mi75 minN 010.00 miFair42°F28°F60%1026.1 hPa
Annapolis, United States Naval Academy, MD18 mi73 minWNW 610.00 miFair44°F33°F65%1025.5 hPa
Fort Meade / Tipton, MD20 mi85 minN 010.00 miFair34°F32°F93%1026.4 hPa
Bay Bridge Field, MD24 mi87 minWNW 1010.00 miFair45°F32°F61%1025.4 hPa

Wind History from ADW (wind in knots)
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1 day agoSW9S9SW6SW8W5W7SW5SW3W4W5CalmSW5SW5SW4CalmW3W7W9NW13
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2 days agoCalmCalmCalmCalmCalmCalmSW8SW9S12SW10S11S12S14S8S7S9S10S16
G20
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G18
SW10

Tide / Current Tables for Hills Bridge (Route 4), Maryland
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Hills Bridge (Route 4)
Click for Map
Mon -- 04:24 AM EDT     3.23 feet High Tide
Mon -- 05:02 AM EDT     Moonset
Mon -- 07:23 AM EDT     Sunrise
Mon -- 11:30 AM EDT     0.75 feet Low Tide
Mon -- 05:01 PM EDT     3.21 feet High Tide
Mon -- 05:41 PM EDT     Moonrise
Mon -- 06:18 PM EDT     Sunset
Mon -- 11:53 PM EDT     1.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.72.32.93.23.22.92.521.510.80.81.21.82.533.23.12.82.41.91.51.2

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Mon -- 01:24 AM EDT     0.00 knots Slack
Mon -- 04:23 AM EDT     0.71 knots Max Flood
Mon -- 05:01 AM EDT     Moonset
Mon -- 07:20 AM EDT     -0.00 knots Slack
Mon -- 07:22 AM EDT     Sunrise
Mon -- 10:28 AM EDT     -0.80 knots Max Ebb
Mon -- 01:30 PM EDT     0.00 knots Slack
Mon -- 04:45 PM EDT     0.90 knots Max Flood
Mon -- 05:40 PM EDT     Moonrise
Mon -- 06:17 PM EDT     Sunset
Mon -- 07:59 PM EDT     -0.00 knots Slack
Mon -- 11:04 PM EDT     -0.84 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.20.20.50.70.70.50.1-0.3-0.6-0.8-0.8-0.6-0.20.20.60.80.90.70.4-0-0.4-0.7-0.8

Weather Map and Satellite Images
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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Baltimore, MD/Washington (4,6,7,8)
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Ground Weather Radar Station Sterling, VA
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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.