Thursday, November15, 2018 L-36.com


Marine Weather and Tides
West Homestead, PA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:05AMSunset 5:03PM Thursday November 15, 2018 2:57 PM EST (19:57 UTC) Moonrise 1:27PMMoonset 12:00AM Illumination 53% 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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7 Day Forecast for Marine Location Near West Homestead , PA
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location: 40.4, -79.91     debug


Area Discussion for - Pittsburgh, PA
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Fxus61 kpbz 151732
afdpbz
area forecast discussion
national weather service pittsburgh pa
1232 pm est Thu nov 15 2018

Synopsis
A low pressure system will continue to bring a mixed bag of
precipitation to the area through Thursday night. Afterwards,
an extended period of cool and mostly dry weather is expected.

Near term through tonight
A wintry mix continues across much of the area. As of noon
Thursday, the temperature has climbed above freezing from
approximately muskingum county oh towards monongalia county wv.

As a result, have dropped the winter weather advisory in this
area as freezing rain is no longer a threat. Elsewhere, a mixed
bag of precipitation continues. The 12z pbz sounding shows
considerable warm air (4+ degrees c) between 750 and 900mb.

This has resulted in hydrometeors melting in this layer and
refreezing on surfaces across areas below freezing.

The surface temperature along south of i-80 will likely rise
above 32 in the next few hours so that a transition from fzra to
ra will likely be observed. This may be short-lived as the
comparatively cold mid-level system enters the area. With
colder mid-level air in place, precipitation will transition
back towards a wintry mix, and eventually all snow. This
transition will likely take place along north of i80 by around
sunset and elsewhere by 10pm or shortly thereafter.

Snow accumulation will be highest in the north and along the
ridges, where 6+ inches is possible. The pittsburgh metropolitan
area will likely see varying accumulation from upwards of 3
inches along hilltops to possibly just a dusting in the
vicinity of downtown pgh. Of course, exact amounts may vary on
exact placement of mesoscale banding around the low tonight.

Snow totals will be updated as needed.

Snow accumulation will be minimal back towards eastern ohio and
the ohio river valley area of wv, where just a brief dusting is
possible.

Short term Friday through Saturday
Colder air will overspread the area tonight and fri, with a
return to snow as the upper low rushes eastward.

As cold advection strengthens on Fri and Fri night in the wake
of the upper system, so will low-level instability and moisture,
leading to an increase in lake-enhanced showers downwind of
lake erie.

Long term Saturday night through Wednesday
The wx pattern thru the remainder of the forecast will be
dominated by a wrn-conus longwave ridge and ern-conus longwave
trough, with precipitation chances dictated by particular
shortwave troughs embedded in the flow.

On the whole, temperature will average below seasonal levels,
with sporadic episodes of lake-enhanced showers as currently-
unresolved disturbances materialize.

Aviation 18z Thursday through Tuesday
An incoming storm system will bring a wintry mix of
precipitation throughout the area today, changing over to snow
late tonight into early Friday morning. Confidence remains high
that this precipitation will bring notable restrictions to cigs
and visibility, though the exact timing of the lowering
restrictions is a little less certain.

Confidence remains low as to the exact precipitation types and
the times of change overs at each terminal. The 00z kpit
sounding shows a significantly dry vertical profile, meaning
that wet bulb effects from incoming precipitation will greatly
impact the overall temperature profile. This wet bulb effect is
poorly handled by models, leaving little confidence on how much
cooling from precipitation will counteract the incoming 850mb
warm air advection. Tafs reflect best guess, with hedges to the
latest hrrr data.

Outlook...

cig restrictions should continue through Saturday under broad
upper troughing, with widespread restrictions possible with a
Sunday cold front.

Pbz watches warnings advisories
Md... Winter storm warning until 1 am est Friday for mdz001.

Oh... Winter weather advisory until 7 pm est this evening for
ohz039>041-048>050-058-059.

Pa... Winter weather advisory until 7 pm est this evening for paz013-
020-021-029-031-073-075.

Winter storm warning until 7 am est Friday for paz009-015-016.

Winter storm warning until 1 am est Friday for paz023-074-076.

Winter weather advisory until 1 am est Friday for paz007-008-
014-022.

Wv... Winter weather advisory until 7 pm est this evening for
wvz001>004-510-511.

Winter storm warning until 1 am est Friday for wvz512>514.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA4 mi65 minENE 72.50 miLight Freezing Rain Fog/Mist32°F30°F96%1018.7 hPa
Pittsburgh, Pittsburgh International Airport, PA18 mi67 minE 73.00 miLight Freezing Rain Fog/Mist32°F30°F96%1019 hPa

Wind History from AGC (wind in knots)
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Last 24hrCalm3CalmN33CalmNE3NE4E6NE8
G14
NE6E6E9E8E8E8E9E6E7E73E5E8E7
1 day ago5NW9
G19
NW9
G20
NW7
G14
NW5NW11
G18
NW7
G16
NW65
G15
W5NW7NW9
G17
NW9
G18
NW8W5W64W7W8W6CalmCalmNW43
2 days agoCalm33CalmCalmSE3SE4E4E3CalmCalmN3N3NW6N6N5
G15
N5NW3W4W6W4W6NW8
G17
W6

Tide / Current Tables for
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Tide / Current Tables for
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Pittsburgh, PA (14,3,4,5)
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Ground Weather Radar Station Pittsburgh, PA
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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.