Thursday, April27, 2017 L-36.com


Marine Weather and Tides
West Homestead, PA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:20AMSunset 8:13PM Thursday April 27, 2017 12:47 PM EDT (16:47 UTC) Moonrise 6:31AMMoonset 8:43PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near West Homestead , PA
   Hourly   EDIT   Help
location: 40.4, -79.91     debug


Area Discussion for - Pittsburgh, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kpbz 271502
afdpbz
area forecast discussion
national weather service pittsburgh pa
1102 am edt Thu apr 27 2017

Synopsis
A very warm day will be interrupted by showers and storms with a
weak front.

Near term /through tonight/
The late morning update featured adjustments to pops based on
the latest radar and high res model trends.

A weak cold/occluding front will is triggering showers and
storms over areas west and south of zanesville. These will
progress eastward and are expected to intensify as the boundary
layer destabilizes this afternoon, especially over areas east of
a dubois to parkersburgh line where peak heating will drive
temperature toward the mid 80s.

Despite impressive deep layer shear, the area has been limited
to a "marginal" severe risk. This seems appropriate given
instability limitations imposed by sub 60 dewpoints and a plume
of warmer mid level air advecting along the advancing front.

Should storms develop and organize, the primary severe threat
still looks to be from damaging wind via short bowing segments.

Passage of the front will herald diminished convection as the
evening progresses.

Short term /Friday through Saturday/
Dry weather returns Friday with high pressure. Any cooler air
behind today's front will be quickly ejected to the north as
strong warm air advection takes over.

Eastern ridge will try to build late Friday, but will be shunted
by a series of upper level waves which will ride over the top of
the rising heights. These wave will bring showers and storms
back to the area late Friday night and Saturday. Seeing
discrepancies in models solutions on Saturday with the position
and timing of the shortwaves. Have leaned toward a more
northern track, which complies with slowly rising 500mb heights
on Saturday.

Long term /Saturday night through Wednesday/
An active pattern is figured for the remainder of the weekend
into early next week. A few shortwaves will cross in continued
moist southwest flow along the front of a broad trough, leading
to rain chances again on Sunday. Timing remains tricky, but
Saturday night currently looks to be the period with the lowest
coverage in the warm sector. Temperatures remain above normal.

The trough lifts out as a closed upper low into the great lakes
by Monday, pushing a fairly strong boundary across us. Given
system strength, the amount of moisture, and a possibly negative
tilt to the upper trough, strong storms appear possible. Behind
this system, quieter weather and seasonable temperatures are
expected into the middle of next week.

Aviation /15z Thursday through Monday/
Vfr conditions expected much of the day. Winds will pick up out
of the south and gust to 20 to 25 knots once mixing gets going.

Timing for the frontal passage will be between roughly 18z and
02z, with showers and thunderstorms along and ahead. Expecting a
brief period of MVFR showers with vcts, with exact timing still
a bit uncertain, temporary ifr possible in any downpours.

Stronger wind gusts are also possible in the strongest storms.

Behind the front, winds will diminish and MVFR ceilings will
linger.

Outlook
Occasional restrictions are possible this weekend along a
stalled frontal boundary. Better restriction chances arrive with
a strong cold front Sunday night into Monday.

Pbz watches/warnings/advisories
Md... None.

Oh... None.

Pa... None.

Wv... None.

15


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA4 mi55 minS 12 G 1710.00 miFair76°F54°F47%1005.1 hPa
Pittsburgh, Pittsburgh International Airport, PA18 mi57 minS 10 G 1710.00 miOvercast77°F55°F48%1005.2 hPa

Wind History from AGC (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrCalmCalmS3S8S4S8S7SE5SE6SE5SE6SE5S7SE7SE6S7S5SE5SE4S5SE5S7S11S12
G17
1 day agoE10E6E7NE5E6NE5E6NE6E6E3E3E5CalmCalmCalmNE5NE3CalmCalmSE3E4CalmS3Calm
2 days agoE8
G20
SE13E11
G17
E9SE10SE9E8E6E8E9E9
G17
E5E9E9SE9SE7E9
G17
E8E8E5NE4NE663

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Pittsburgh, PA (12,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Pittsburgh, PA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.