Tuesday, May22, 2018 L-36.com


Marine Weather and Tides
Chambersburg, PA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:47AMSunset 8:27PM Tuesday May 22, 2018 3:32 PM EDT (19:32 UTC) Moonrise 12:19PMMoonset 1:14AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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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ANZ538 Patapsco River Including Baltimore Harbor- 133 Pm Edt Tue May 22 2018
This afternoon..S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms.
Tonight..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 kt. Waves less than 1 ft.
Thu..N winds 5 kt. Waves less than 1 ft.
Thu night..SW winds around 5 kt. Waves flat.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 133 Pm Edt Tue May 22 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A warm front will pass through the waters today and a cold front will approach from the northwest tonight before passing through Wednesday. High pressure will build overhead Thursday through Friday before moving offshore during the weekend. Small craft advisory conditions are possible Wednesday.

7 Day Forecast for Marine Location Near Chambersburg , PA
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location: 39.93, -77.66     debug


Area Discussion for - State College, PA
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Fxus61 kctp 221808
afdctp
area forecast discussion
national weather service state college pa
208 pm edt Tue may 22 2018

Synopsis
Low pressure will track down the st lawrence river valley,
dragging a cold front through the region overnight. High
pressure will build southeast into the region for the second
half of the week.

Near term through tonight
Radar shows a second band of showers working across south-
central pa as of early afternoon. New convection is starting to
fire in the increasingly unstable airmass from ohio back into
indiana. SPC has issued a watch that pokes into far western pa,
and with the airmass further east being so slow to recover, it
remains to be seen how far into central pa the severe threat
will manage to get.

As of 1pm, some modest CAPE is shown by the rap to extend from
somerset up into warren county. Clouds are still pretty thick to
the east and temps are still generally only in the mid 60s,
though dewpoints have risen smartly. As it stands, the slight
risk affects my far western zones at least partly, but with the
slow pace of the clearing confidence is low for severe storms.

The latest hrrr does show an another area of of showers sliding
se across the area this evening just around and after sunset,
which is not a great time for local severe weather. The SPC href
has a couple of members that hint at some fairly robust storms,
but given the cool stable airmass locally, confidence isn't
high.

Latest timing suggests the cold front passing some time between
about 2-5am tonight (06-09z). The drier air will bring
diminishing showers, especially from midnight through early
Wednesday.

With skies remaining cloudy, lows will only drop back into the
50s to lower 60s, which will be much warmer than normal.

Short term Wednesday
A few showers may still linger over my far sern zones early
Wednesday, but drier air on a freshening northerly breeze will
usher in much improved conditions as the day progresses.

Highs will range through the 70s with comfortable humidity.

Long term Wednesday night through Tuesday
Look for high pressure and dry weather Wednesday night through
Friday with seasonable morning lows and warm afternoons.

Saturday is trending drier and will probably be the warmest day
of the holiday weekend with most locations in the 80s. A more
unsettled, humid and a little cooler weather is likely by the
end of the weekend and on memorial day. While there will be pops
in the forecast, still uncertain exactly how wet things will
turn out.

Aviation 18z Tuesday through Sunday
Widespread MVFR with areas of showers and ifr will continue
with only very slow improvement to MVFR low endVFR by late
afternoon.

As partial sunshine develops over western areas, the chances for
thunderstorms will increase ahead of the weak cold front that
will pass overnight. A few of these storms may be strong to
severe with localized bouts of hail wind before weakening during
the evening. The greatest risk area at this time appears to be
over the southwest 1 3 of the airspace.

Outlook...

wed... Am MVFR ifr becoming widespreadVFR by mid day.

Thu-fri...VFR no sig wx expected.

Sat-sun... Warm and humid mainlyVFR with scattered
showers thunderstorms.

Ctp watches warnings advisories
None.

Synopsis... La corte
near term... La corte
short term... La corte
long term... Ross
aviation... La corte


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 73 mi45 min E 1.9 G 4.1 67°F 72°F1016.6 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 78 mi45 min E 5.1 G 6 67°F 1017 hPa
WASD2 - 8594900 - Washington, DC 81 mi45 min SSE 5.1 G 6 75°F 66°F1016.1 hPa

Wind History for Baltimore, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hagerstown, Washington County Regional Airport, MD16 mi40 minN 03.00 miLight Rain Fog/Mist72°F68°F87%1016.9 hPa

Wind History from HGR (wind in knots)
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Last 24hr4E4S4SE7E4SE5SE6S8S7S9S10S6S8S11S7S5S8S7S7S8S6S6S6Calm
1 day agoW14W9NW10NW11N7N7NE6N6N6N5N4N44CalmCalmN3N4N5N43E43W4NW3
2 days agoS3S4S7NE3CalmN4NW5NW3CalmNW3W4W4W3SE3S4CalmCalmS7SW6SW6SW8W8W9NW9

Tide / Current Tables for Middle Branch, Baltimore Harbor, Maryland
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Middle Branch
Click for Map
Tue -- 01:36 AM EDT     1.27 feet High Tide
Tue -- 02:08 AM EDT     Moonset
Tue -- 05:47 AM EDT     Sunrise
Tue -- 07:58 AM EDT     0.42 feet Low Tide
Tue -- 01:16 PM EDT     Moonrise
Tue -- 01:53 PM EDT     1.47 feet High Tide
Tue -- 08:19 PM EDT     Sunset
Tue -- 09:02 PM EDT     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.21.31.210.80.60.50.40.50.70.91.21.41.51.41.210.80.60.40.30.40.6

Tide / Current Tables for Middle Branch, Baltimore Harbor, Patapsco River, Maryland
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Middle Branch
Click for Map
Tue -- 01:36 AM EDT     1.28 feet High Tide
Tue -- 02:08 AM EDT     Moonset
Tue -- 05:47 AM EDT     Sunrise
Tue -- 07:58 AM EDT     0.42 feet Low Tide
Tue -- 01:16 PM EDT     Moonrise
Tue -- 01:53 PM EDT     1.47 feet High Tide
Tue -- 08:19 PM EDT     Sunset
Tue -- 09:02 PM EDT     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.21.31.210.80.60.50.40.50.70.91.21.41.51.41.210.80.60.40.30.40.6

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Mid-Atlantic    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.
target = "new">Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for State College, PA (15,3,4,5)
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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.