Monday, June26, 2017 L-36.com


Marine Weather and Tides
Chambersburg, 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 5:42AMSunset 8:45PM Monday June 26, 2017 11:42 PM EDT (03:42 UTC) Moonrise 7:37AMMoonset 9:58PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 1045 Pm Edt Mon Jun 26 2017
.small craft advisory in effect until 2 am edt Tuesday...
Rest of tonight..SW winds 10 kt with gusts to 20 kt... Becoming nw. Waves 1 ft. Isolated showers.
Tue..W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft or less.
Wed..W winds 5 kt. Waves flat.
Wed night..S winds 5 to 10 kt. Waves 1 ft or less.
Thu..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Thu night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1045 Pm Edt Mon Jun 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build west of the area through Tuesday. A weak cold front will cross the waters Tuesday. High pressure will move over the area Wednesday before shifting offshore Thursday. Small craft advisory conditions are possible over portions of the waters Tuesday and again Thursday.

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 270237
afdctp
area forecast discussion
national weather service state college pa
1037 pm edt Mon jun 26 2017

Synopsis
A long wave trough over the great lakes and eastern canada will
deepen across the region. This feature will keep it cooler than
normal into Wednesday. Scattered showers and thunderstorms will
be across the region this afternoon and evening and again on
Tuesday, especially across the northern part of the keystone
state during the afternoon hours. A warm up and return of higher
humidity levels will occur on Thursday and Friday, as high
pressure moves off the east coast. While temperatures will
average near to above normal for the second half of the week,
there will be occasional showers and thunderstorms.

Near term until 6 am Tuesday morning
Showers were more widespread than expected this evening,
particularly in southern extent. Shortwave trof lifting through
east central pa late this evening is taking the bulk of activity
with it, but will need to keep slgt chc to chc pops going until
shortly past midnight in the east.

Farther west, additional upstream shortwave approaching from
central oh will keep isold to sct coverage of showers going
overnight into my western zones. Another round of nocturnal-mid-
lake-convergence-driven- convection could pop up overnight.

These may reach into the laurels alleghenies by morning and have
kept low chc pops there. It will be cooler tonight than Mon am,
but the varying cloud cover could help keep temps up. Some fog
is possible in the valleys where they do get some rain this
evening.

Short term 6 am Tuesday morning through 6 pm Tuesday
Tuesday will be a similar day to Monday... But may hold a few
less showers in the aftn with the negative suppressing influence
of the rising heights behind the strong short wave passing
overhead (and the related cloud cover and any showers) in the
morning. The afternoon heating and cool air aloft will still
generate sct showers in the NRN tier. MAX temps will be similar
to Monday or even a few degs f cooler factoring in chaotic cloud
cover in the morning. On the other hand... With the length of
the daylight in late june, the Sun can can overcome a late start
to cook up temps.

Long term Tuesday night through Monday
Trough axis moves through on tue, with secondary trough sliding
through Tue night as high pressure builds at the surface. This
will keep just very low pops mentioned in the NW mtns during the
evening. With clearing skies, NW flow and light winds, and
dewpoints in the mid 40s to lower 50s, Wed morning will be the
chilliest one of the week as lows should drop to near dewpoints.

With plenty of sun, temps will rebound during the day back into
the 70s.

As the high moves off the east coast by Thursday, a warm front
will lift across pa ushering in a southwest flow of warmer and
noticeably more humid air. Lows Thu morning will be about 10f
warmer than the day before, and daytime highs will bump up about
4-8f as well.

Upper flow becomes zonal late week as a surface low tracks
across the northern great lakes and southern canada, which will
focus a stationary front across that region. We'll remain on the
warm humid side of that boundary (as highs rise to near 80 nw
and 90 SE along with muggy overnight), and see convective
activity increase Thu heading in the weekend - with highest
likelihood over the nw. Convection will be more scattered over
the se.

Active pattern continues Sun into Mon as another low rides along
the persistent frontal boundary to our west and north, finally
nudging that front into through pa and keeping mention of
showers in the forecast while taking some of the edge off of
the above normal temps.

Aviation 03z Tuesday through Saturday
Scattered showers and a few tsra should die out over central
pa shortly after sunset with little chance of any restrictions.

Main threat will come overnight at bfd, where wet ground
combined with clearing skies and light wind could potentially
result in fog. For now, am banking on just enough of a breeze to
preclude significant fog issues at bfd, but will be monitoring
for possible low visibilities after midnight. Elsewhere,
confidence is high for widespreadVFR conditions for most of the
night.

A weak frontal boundary will push through the region early
Tuesday morning, accompanied by a few showers. Lack of moisture
with this system should translate to a continuation ofVFR
conditions for much of central pa. However, brief MVFR cig vis
reductions appear possible at bfd between 10z-13z. High
pressure and associated dry air mass will build into the region
later Tuesday, accompanied by widespreadVFR conditions.

Outlook
Wed... No sig wx expected.

Thu-fri... Isolated pm tsra impacts poss, mainly northern pa.

Sat... Scattered pm tsra impacts possible.

Equipment
Kccx radar is back on line and in normal operation.

Ctp watches warnings advisories
None.

Synopsis... Dangelo
near term... Dangelo devoir
short term... Dangelo
long term... Rxr
aviation... Fitzgerald
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 73 mi42 min SW 4.1 G 7 74°F 79°F1014.8 hPa (+0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 78 mi42 min S 11 G 12 75°F 1014.9 hPa (+0.0)
WASD2 - 8594900 - Washington, DC 81 mi42 min S 6 G 8 75°F 82°F1014.9 hPa (+0.0)

Wind History for Baltimore, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hagerstown, Washington County Regional Airport, MD16 mi49 minW 410.00 miPartly Cloudy71°F48°F46%1016.6 hPa

Wind History from HGR (wind in knots)
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Last 24hrSW5NW5CalmW5SW5SW5SW5SW3SW5W6W9NW116SW6W7SW10SW9SW7SW8SW6S9W7NW3W4
1 day agoCalmS3SW4W4SW3SW5W3Calm3W64S6W10W9
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2 days agoNE3NW53N6NW7W7W4W8SW6NW13W13W16W14W11W10W13W9W8SW7SW6SW5SW7SW5W5

Tide / Current Tables for Middle Branch, Baltimore Harbor, Maryland
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Middle Branch
Click for Map
Mon -- 02:59 AM EDT     0.24 feet Low Tide
Mon -- 05:41 AM EDT     Sunrise
Mon -- 08:34 AM EDT     Moonrise
Mon -- 09:31 AM EDT     1.88 feet High Tide
Mon -- 04:51 PM EDT     0.29 feet Low Tide
Mon -- 08:37 PM EDT     Sunset
Mon -- 10:00 PM EDT     1.25 feet High Tide
Mon -- 10:52 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.50.30.20.30.50.91.31.71.91.91.71.41.10.80.50.30.30.40.60.91.21.31.2

Tide / Current Tables for Middle Branch, Baltimore Harbor, Patapsco River, Maryland
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Middle Branch
Click for Map
Mon -- 02:59 AM EDT     0.24 feet Low Tide
Mon -- 05:41 AM EDT     Sunrise
Mon -- 08:34 AM EDT     Moonrise
Mon -- 09:31 AM EDT     1.88 feet High Tide
Mon -- 04:50 PM EDT     0.29 feet Low Tide
Mon -- 08:37 PM EDT     Sunset
Mon -- 10:00 PM EDT     1.25 feet High Tide
Mon -- 10:52 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.50.30.20.30.50.91.31.71.91.91.71.41.10.80.50.40.30.40.60.91.21.31.2

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 (23,6,7,8)
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Ground Weather Radar Station Sterling, VA
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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.