Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Felton, 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 6:23AMSunset 7:56PM Sunday August 20, 2017 8:59 PM EDT (00:59 UTC) Moonrise 3:58AMMoonset 6:18PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 732 Pm Edt Sun Aug 20 2017
Tonight..SW winds 5 kt. Waves flat.
Mon..S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.
Mon night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue..S winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..N winds 5 kt. Waves less than 1 ft.
Fri..N winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 732 Pm Edt Sun Aug 20 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore through tonight. A cold front will cross the waters late Tuesday night into early Wednesday. High pressure will return for the second half of the week. Small craft advisories will likely be needed Monday night through Wednesday night.

7 Day Forecast for Marine Location Near Felton , PA
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location: 39.88, -76.53     debug


Area Discussion for - State College, PA
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Fxus61 kctp 202356
afdctp
area forecast discussion
national weather service state college pa
756 pm edt Sun aug 20 2017

Synopsis
High pressure will bring clear skies and seasonal temperatures
to the region tonight. Look for partly cloudy skies with a
chance of afternoon thunderstorms on Monday. A strong cold front
will approach the region later on Tuesday, bringing a chance of
stronger thunderstorms with it. Cooler and drier conditions
will return for the second half of the week.

Near term until 6 am Monday morning
Clear skies throughout this evening with strong high pressure
and subsidence providing a clear overnight as well.

Low temps will be within a degree or two of seasonal norms.

Patchy river valley fog expected a few hours either side of
sunrise.

Short term 6 am Monday morning through Monday night
High pressure moves east with southerly and more warm and humid
flow returning. Model show a weak shortwave drifting across the
area during the afternoon and this combined with heating will
trigger a few thunderstorms. Have increased pops to account for
this. Any convection will decrease quickly after sunset with a
warm and muggy night as area in the warm sector ahead of cold
front.

Long term Tuesday through Sunday
The big weather maker this week still looks to be a potent late
summer cold front that will pass through the region Tuesday
evening into early Wednesday.

After a surge of heat and humidity Monday and Tuesday, with
some southern locations possibly nudging 90 each day, the strong
front will bring a noticeably cooler and drier airmass to the
region starting midweek and lasting through the weekend and into
next week.

The biggest question will be how much severe potential will
accompany the front. Latest timing shows the front just moving
through central ohio by Tuesday evening. The SREF and gefs
develop very limited CAPE near the cold front and into central
pa, keeping a finger of unstable air confined mainly to the
coastal plain well out ahead of the front. But wind fields
increase heading into Tue eve, and this may be enough combined
with the difference in the two airmasses to kick storms off and
keep them propagating eastward. For now, slight risk from spc
encompasses much of the CWA with marginal risk in the se.

The remainder of the week into the weekend turns cooler and
mainly dry as a sprawling high moves slowly eastward out of
southern canada. Interesting to note that the deterministic
models show 850 temps as cold as 3c just north of the canadian
border behind the cold front, a reminder the change in seasons
is not all that far away. Chilliest readings look to be the
mornings of Fri Sat Sun with high centered overhead, dipping
lows into the 40s over the northern mountains (and deeper
valleys of the central mountains) and solidly into the 50s
elsewhere.

Aviation 00z Monday through Friday
High pressure over the region will ensureVFR conditions and
very light wind for the balance of the evening. Some patchy valley
fog is expected across northern pa early Monday morning, but
the odds of significant reductions at any central pa airfields
are low. Perhaps a 10 percent chance of a brief dip to ifr at
kipt around dawn.

Scattered afternoon thunderstorms will form Monday afternoon, as
an upper level disturbance passes through. Despite predominantly
vfr conditions, a brief reduction is possible from an afternoon
or evening thunderstorm. A blend of the latest
convection-allowing models suggest the best chance will be
across the eastern airfields, including kipt,kmdt and klns,
between 18z-22z.

Outlook
Tue... Patchy am fog poss. Late day evening tsra impacts poss.

Wed... Early am low CIGS poss bfd jst.

Thu-fri... No sig wx expected.

Ctp watches warnings advisories
None.

Synopsis... Ross
near term... Devoir
short term... Ross
long term... Rxr
aviation... Fitzgerald


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44057 - Susquehanna, MD 34 mi30 min NNW 1.9 G 1.9 78°F 1020.2 hPa
BLTM2 - 8574680 - Baltimore, MD 42 mi42 min SSW 4.1 G 7 80°F 82°F1019.8 hPa
CHCM2 - 8573927 - Chesapeake City, MD 45 mi42 min SE 1 G 1.9
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 46 mi42 min SSE 7 G 8 80°F 1020 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 49 mi42 min E 2.9 G 2.9 75°F 83°F1020.5 hPa

Wind History for Baltimore, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
York, York Airport, PA18 mi67 minN 010.00 miFair72°F66°F82%1020.4 hPa
Lancaster, Lancaster Airport, PA21 mi67 minWSW 410.00 miFair78°F62°F58%1020 hPa

Wind History from THV (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3W4CalmN6CalmW4W4NW4W3N3CalmCalm
1 day agoS5CalmS8CalmCalmW3W3W4W3W3W4W3W5NW44NW8CalmNW63SW5SW65SW3W8
2 days ago3Calm3SE654CalmS3CalmSW3CalmS4S4SW45SW66S7SW7W5NW11
G23
CalmCalmCalm

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Sun -- 04:22 AM EDT     0.58 feet Low Tide
Sun -- 04:56 AM EDT     Moonrise
Sun -- 06:21 AM EDT     Sunrise
Sun -- 10:05 AM EDT     3.95 feet High Tide
Sun -- 06:10 PM EDT     0.92 feet Low Tide
Sun -- 07:15 PM EDT     Moonset
Sun -- 07:53 PM EDT     Sunset
Sun -- 10:17 PM EDT     2.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.91.51.10.80.60.71.122.93.73.93.83.53.12.621.51.10.91.11.72.42.72.7

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
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Havre de Grace
Click for Map
Sun -- 02:59 AM EDT     0.24 feet Low Tide
Sun -- 04:56 AM EDT     Moonrise
Sun -- 06:21 AM EDT     Sunrise
Sun -- 08:53 AM EDT     2.76 feet High Tide
Sun -- 04:19 PM EDT     0.16 feet Low Tide
Sun -- 07:15 PM EDT     Moonset
Sun -- 07:52 PM EDT     Sunset
Sun -- 09:39 PM EDT     2.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.70.40.20.40.91.52.22.62.82.62.31.81.40.90.40.20.20.61.21.722.11.9

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 (20,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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.