Wednesday, September19, 2018 L-36.com


Marine Weather and Tides
Shady Side, MD

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:50AMSunset 7:08PM Wednesday September 19, 2018 12:57 PM EDT (16:57 UTC) Moonrise 3:21PMMoonset 12:32AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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- 1034 Am Edt Wed Sep 19 2018
Rest of today..N winds 10 kt. Waves 1 to 2 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 5 to 10 kt. Waves 1 ft.
Thu night..SE winds 5 to 10 kt. Waves 2 ft.
Fri..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Fri night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sat..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sun..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
ANZ500 1034 Am Edt Wed Sep 19 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the waters today into Thursday before moving offshore later in the week. A cold front will approach this weekend, then stall near or just south of the waters.


7 Day Forecast for Marine Location Near Shady Side, MD
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location: 38.86, -76.46     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 191433
afdlwx
area forecast discussion
national weather service baltimore md washington dc
1033 am edt Wed sep 19 2018

Synopsis
High pressure will build over the region today and into
Thursday before migrating over the western atlantic late in the
week. A cold front will approach from the northwest toward the
end of the week before stalling near or over the region through
the weekend.

Near term through tonight
High pressure is centered over the tennessee and lower ohio
river valley's this morning as a weak frontal boundary tracks
slowly southward from central ohio and western pennsylvania.

This frontal boundary will decay today as it nears our western
and northern zones, bringing mainly an increase in cloud cover,
however a passing light shower cannot be ruled out. Hi res
guidance continues to paint some shower activity over the
central foothills of va and portions of the southern shenandoah
valley this afternoon. This is despite ridging building in to
the region and an unfavorable right entrance region over the
area. Will maintain slight chance pops and increased cloud cover
for this region as a result.

Plentiful sunshine for the remainder of the CWA today will
allow high temperatures to top out in the lower to middle 80s.

High pressure will continue to nudge its way overhead tonight,
promoting clear skies and light winds. This will allow for fog
development in the favored valley locations towards Thursday
morning, but widespread fog is not expected. Lows tonight will
be in the 60s area wide as dewpoints continue to fall further in
to the upper 50s to middle 60s.

Short term Thursday through Thursday night
The dry airmass will allow for dry conditions to continue into
Thursday. High pressure remains in control Thursday while it
builds overhead at the surface and aloft. Winds will be light
through the day then become southerly as the high pressure
moves offshore.

A cold front approaches from the northwest Friday and into Friday
night. Warm and moist air advection due to southerly flow ahead of
the front will increase the chance of showers and thunderstorms over
our region, mainly at higher elevations.

Long term Friday through Tuesday
A cold front will continue southward across the area on Saturday,
eventually slowing it's southward progress and stalling out on
Sunday. It appears as though most of our area will be to the north
of the front in more stable air. The exact positioning of the
frontal boundary both at the surface and aloft will be a key player
in our forecast. Showers will be possible to the north of the
surface boundary with ascent occurring along the sloped frontal
boundary. However, if the front progresses far enough to our south,
conditions could stay mostly dry. For now it appears as though there
will be at least some chance for showers on both Saturday and Sunday
with the front nearby.

By Monday, a potent longwave trough will progress eastward from the
northern rockies to the northern plains. On Monday afternoon, the
remnant stalled out frontal boundary will start to be influenced by
the large scale circulation associated with the trough and move back
northward across the region as a warm front. Showers could once
again be possible as the warm front progresses through. On Tuesday,
the aforementioned longwave trough will still be located upstream of
the region. Large scale ascent downstream of the trough within the
warm sector should facilitate the development of showers and
possibly a few thunderstorms.

Aviation 14z Wednesday through Sunday
PredominateVFR conditions expected over the terminals today as
high pressure builds at the surface and aloft, with northwest
winds at or around 10 knots. A decaying boundary to our
northwest could spark a few showers this afternoon near mrb cho,
but coverage and intensity likely too low to cause much in the
way of restrictions.

Patchy fog possible again late tonight, then again late
Thursday night. Northerly winds today will veer southeasterly
on Thursday, then southerly Thursday night into Friday as high
pressure shifts offshore.

Intermittent showers could briefly drop conditions to sub-vfr each
afternoon from Saturday through Tuesday.

Marine
Northerly breezes along the lower tidal potomac and chesapeake
bay this morning are bringing SCA criteria gusts. Winds expected
to abate later this afternoon as high pressure builds overhead,
with sub SCA conditions prevailing through Thursday. Sca
conditions may return on Friday ahead of an approaching cold
front. The frontal boundary will stall nearby or just south of
the waters this weekend, delivering a weak gradient, thus sub
sca conditions are forecast.

Marginal SCA level winds could be possible Monday night into Tuesday
in southerly flow. Showers and thunderstorms will be possible on the
waters each afternoon Saturday through Tuesday with a frontal
boundary nearby.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until noon edt today for anz533.

Small craft advisory until 6 pm edt this evening for anz534-
537-543.

Synopsis... Imr bkf
near term... Bkf
short term... Imr
long term... Kjp
aviation... Imr bkf kjp
marine... Imr bkf kjp


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TPLM2 - Thomas Point, MD 3 mi57 min N 11 G 11 77°F 75°F1014.4 hPa (+0.7)68°F
44063 - Annapolis 8 mi37 min NNE 9.7 G 14 78°F 1013.9 hPa
APAM2 - 8575512 - Annapolis, MD 9 mi39 min 80°F 1013 hPa
CPVM2 10 mi39 min 77°F 71°F
BSLM2 - Chesapeake Bay, MD 14 mi147 min N 1.9 74°F 1014 hPa66°F
44062 - Gooses Reef, MD 21 mi37 min NNE 12 G 14 78°F 1014.9 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 25 mi39 min NNW 13 G 16 79°F 1013.3 hPa
FSNM2 25 mi45 min N 15 G 17 79°F 1013.3 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 27 mi39 min N 8.9 G 9.9 75°F 74°F1014 hPa
BLTM2 - 8574680 - Baltimore, MD 29 mi51 min NNE 9.9 G 13 79°F 78°F1013.2 hPa
CA2 - 8571892 - Cambridge, MD 29 mi45 min 81°F 79°F1014.1 hPa
WASD2 - 8594900 - Washington, DC 30 mi39 min NNE 1.9 G 9.9 83°F 72°F1013.9 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 32 mi39 min NNE 16 G 18 76°F 1014.1 hPa
SLIM2 - 8577330 - Solomons Island, MD 37 mi39 min N 8.9 G 12 78°F 80°F1013.3 hPa
NCDV2 48 mi39 min N 7 G 12 83°F 77°F1012.9 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD8 mi63 minN 910.00 miFair82°F66°F60%1013.8 hPa
Bay Bridge Field, MD11 mi72 minN 710.00 miFair79°F69°F74%1013.5 hPa
Easton / Newman Field, MD21 mi67 minNNE 9 G 1610.00 miA Few Clouds82°F66°F58%1014.2 hPa
Camp Springs / Andrews Air Force Base, MD22 mi61 minN 1010.00 miA Few Clouds80°F68°F66%1014.3 hPa
Fort Meade / Tipton, MD23 mi69 minNNW 510.00 miPartly Cloudy79°F68°F70%1014.9 hPa

Wind History from NAK (wind in knots)
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Last 24hrSW63N5N8NW9N8NW4CalmNW4NW4NW4NW7NW4NW5NW7NW5NW5NW5NW5NW6NW8NW6N10N11
1 day agoSE11S10
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S10SE10SE11SE11SE10S11
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S8S10S8S10S4S4S7S6S6S7S54
2 days ago--N5N7NE66E6E7E7E6SE10SE11E7E6E3NE3E5E5E5E5E5E7SE10SE12SE12

Tide / Current Tables for Shady Side, West River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (12,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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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.