Thursday, September21, 2017 L-36.com


Marine Weather and Tides
Trevorton, PA

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 6:51AMSunset 7:04PM Thursday September 21, 2017 3:41 PM EDT (19:41 UTC) Moonrise 7:11AMMoonset 7:11PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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ANZ530 Chesapeake Bay North Of Pooles Island- 131 Pm Edt Thu Sep 21 2017
This afternoon..N winds 5 kt. Waves flat.
Tonight..N winds 5 kt. Waves flat.
Fri..N winds 5 kt. Waves less than 1 ft.
Fri night..N winds 5 kt. Waves less than 1 ft.
Sat..N winds 5 kt. Waves less than 1 ft.
Sat night..N winds around 5 kt. Waves 1 ft or less.
Sun..N winds around 5 kt. Waves flat.
Mon..NE winds around 5 kt. Waves 1 ft or less.
ANZ500 131 Pm Edt Thu Sep 21 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A ridge of high pressure will remain over the eastern united states through early next week.

7 Day Forecast for Marine Location Near Trevorton, PA
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location: 40.75, -76.74     debug


Area Discussion for - State College, PA
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Fxus61 kctp 211854
afdctp
area forecast discussion
national weather service state college pa
254 pm edt Thu sep 21 2017

Synopsis
A ridge of high pressure at the surface and aloft will stay
anchored across the lower great lakes, ohio valley and
northeastern states through at least Tuesday. This will
continue of dry and unseasonably warm weather to pennsylvania.

Near term until 6 am Friday morning
Few CU as dewpoints are dropping, ESP in the elevations. But,
they should rise slightly again through the evening and
overnight. Fog is again expected over the region, but mainly in
the valleys. Going with just a deg or two cooler tonight than
last night, as the drying of the airmass today may allow things
to cool off just slightly more tonight. The subsidence
inversion height is lowering slightly hour by hour, so mixing
during the day on Fri should not be as deep as today. This might
make reching today's maxes a little challenging, but it is tough
to go away from a persistence forecast in this ever-so-stagnant
pattern.

Short term 6 am Friday morning through 6 pm Friday
Ridge, ridge and more ridge. The subsidence inversion height is
lowering slightly hour by hour, so mixing during the day on fri
should not be as deep as today. This might make reaching
today's (thurs) maxes again a little challenging, but it is
tough to go away from a persistence forecast in this ever-so-
stagnant pattern.

Long term Friday night through Thursday
For this weekend and early next week, the pattern remains
stable as a building ridge continues to stifle any convection.

Weak flow at night should allow for valley fog to form nightly
and to greet morning commuters. The overall consensus in the
models through the weekend is for the 590 dam closed 500 hpa
high will drift slowly out of the midwest states, and become
centered over western pa by late this weekend through early next
week.

Ensemble temperatures are in general consensus and high temps
through the weekend will be 10-15f above normal with little or
no chance of rain until Monday at the very earliest. There are
hints that what was left of jose could bring moisture and thus
some rainfall through Monday into Tuesday. However there
continues to be model variability so have only chance pops.

Lows early each morning will be consistently in the mid and
upper 50s across the northern and western mtns, to lower 60s in
the larger SE metro areas.

Min temps may cool off slightly for this weekend thanks to deep
dry air and a light N to NW llvl flow of drier dewpoint air at
the sfc.

Aviation 19z Thursday through Tuesday
Vfr has returned to all terminals. Valley fog will redevelop
each overnight for the next 5+ days lingering through 13-14z
each morning. Some morning fog may briefly impact the higher
elevation terminals (bfd jst) in the west. Otherwise,VFR should
rule most of the area as high pressure remains stuck overhead.

Outlook
Sat-mon... Am valley fog. OtherwiseVFR.

Climate
Astronomical fall autumnal equinox begins at 4:02 pm Friday
september 22, 2017.

Ctp watches warnings advisories
None.

Synopsis... Dangelo
near term... Dangelo
short term... Dangelo
long term... Lambert gartner
aviation... Dangelo
climate...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MRCP1 - 8540433 - Marcus Hook, PA 96 mi41 min 85°F 76°F1015.1 hPa (-1.4)
CHCM2 - 8573927 - Chesapeake City, MD 98 mi41 min N 5.1 G 7 84°F 76°F1015.8 hPa (-1.4)

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Selinsgrove Penn Valley Airport, PA8 mi48 minWNW 410.00 miFair85°F66°F53%1017.1 hPa
Muir Army Air Field / Indiantown, PA23 mi1.7 hrsN 510.00 miMostly Cloudy83°F63°F52%1017.2 hPa

Wind History from SEG (wind in knots)
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Last 24hrN64N3CalmCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm33NW4
1 day ago5N4NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalmN7NW66NE5NE7
2 days ago56SE6SE4SE4CalmCalmNW3CalmCalmW3N4CalmCalmCalmCalmCalmCalmCalmNW6N53NE43

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Thu -- 06:51 AM EDT     Sunrise
Thu -- 07:12 AM EDT     0.89 feet Low Tide
Thu -- 08:07 AM EDT     Moonrise
Thu -- 12:04 PM EDT     3.29 feet High Tide
Thu -- 07:02 PM EDT     Sunset
Thu -- 07:31 PM EDT     0.77 feet Low Tide
Thu -- 08:09 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.33.12.72.31.81.410.911.62.333.33.22.82.41.91.410.80.81.222.8

Tide / Current Tables for Charlestown, Northeast River, Maryland
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Charlestown
Click for Map
Thu -- 06:12 AM EDT     0.81 feet Low Tide
Thu -- 06:50 AM EDT     Sunrise
Thu -- 08:07 AM EDT     Moonrise
Thu -- 12:06 PM EDT     2.83 feet High Tide
Thu -- 06:30 PM EDT     0.71 feet Low Tide
Thu -- 07:02 PM EDT     Sunset
Thu -- 08:08 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.82.72.31.91.410.80.91.21.82.32.72.82.72.41.91.410.70.711.52.12.6

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 State College, PA (15,3,4,5)
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Ground Weather Radar Station State College, PA
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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.