Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Whitaker, 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 7:03AMSunset 5:04PM Wednesday November 14, 2018 2:57 PM EST (19:57 UTC) Moonrise 12:52PMMoonset 11:05PM Illumination 42% Phase: First Quarter Moon; Moon at 7 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 Whitaker , PA
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location: 40.4, -79.89     debug


Area Discussion for - Pittsburgh, PA
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Fxus61 kpbz 141741
afdpbz
area forecast discussion
national weather service pittsburgh pa
1241 pm est Wed nov 14 2018

Synopsis
Dry but cold conditions will occur Wednesday with high
pressure. Low pressure will bring a wintry mix of precipitation
by Thursday.

Near term until 6 pm this evening
8am update... Made minor tweaks to hourly temperatures and sky
grids. The rest of the forecast package is on track.

Previous discussion...

light snow showers north of i-80 will dissipate later this
morning as increasing high pressure and subsequent subsidence
dry out the boundary layer. A plume of high cirrus plus residual
stratocu from cool NW flow will limit cooling overnight from
previous forecasts... Though morning lows will be below freezing
areawide. The lack of significant cloud clearing plus the cold
start will result in high temperatures struggling to reach the
upper 30s.

Short term 6 pm this evening through Friday
All eyes will be on the storm system moving through the
tennessee valley into the ohio river valley and mid-atlantic
Wednesday night into Thursday. Two areas of sfc low pressure
will develop in response to the upper level low, the weaker one
over central kentucky and the stronger one off the atlantic
coast. They will slowly track northeast well ahead of the
upper level low pressure, which will finally reach the area
late Thursday night before swiftly exiting into the northeast
Friday.

Models are in general agreement on the timing and evolution of
precipitation areas. Precip will reach our southern zones mid-
Thursday morning and spread northward through the day. It will
be reinvigorated late Thursday night into Friday morning with
the passage of the upper level low to our south. As the low
exits, dry air and subsidence will begin, though NW flow will
allow for lake enhanced snow showers throughout the day.

The biggest uncertainty is the temperature profile both at the
sfc and aloft, which will greatly dictate precip type. Latest
model guidance and soundings show a slug of above freezing
850mb temps moving northward ahead of the upper level low at the
onset of the event, putting the onus on sfc temps to remain
at below freezing to create any wintry mix. Sleet freezing rain
is anticipated at the onset of this event, but these temps plus
daytime heating will change precip to rain for most areas and
limit wintry accumulations during the daytime. Though looking
much less likely... There remains a very small risk for a
prolonged freezing rain and or sleet event if sfc temps are
slow to warm above freezing due to reinforcing cold air from the
east. Will keep watch in effect and hold off advisory issuance
for daytime crew who will get final look at model changes ahead
of event start time.

Long term Friday night through Tuesday
Generally dry and cool weather is expected the rest of the
period as we enter a prolonged period of dry NW flow. A cold
frontal passage Sun could create some precipitation chances,
though the gfs ECMWF disagree on the amount of lift and
available moisture. Used a blend of these two models for pops
during this period.

Aviation 18z Wednesday through Monday
Some occasional MVFR CIGS are possible this afternoon under high
overcast skies. Afterwards, all sites will remainVFR until
after sunrise Wednesday when precipitation will move in from
the southwest. By afternoon, all sites should have ifr or low
MVFR cigs. Although a mix of snow, sleet, freezing rain, and
rain is expected, the primary precipitation type at this time
appears to be snow.

Outlook...

widespread precipitation will come to an end on Friday.

Occasional disturbances will keep a chance of showers in the
forecast through the weekend, primarily north of pittsburgh.

Pbz watches warnings advisories
Md... Winter storm watch from late tonight through Friday morning
for mdz001.

Oh... None.

Pa... None.

Wv... Winter storm watch from late tonight through Friday morning
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 minVar 310.00 miFair32°F19°F61%1034 hPa
Pittsburgh, Pittsburgh International Airport, PA19 mi67 minNW 410.00 miOvercast30°F18°F61%1034.8 hPa

Wind History from AGC (wind in knots)
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Last 24hr5NW9
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NW8W5W64W7W8W6CalmCalmNW43
1 day agoCalm33CalmCalmSE3SE4E4E3CalmCalmN3N3NW6N6N5
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G17
W6
2 days agoSW3S6S4S4CalmSE5S3CalmS3S3SE3S4CalmSE3E3SE3CalmCalmNE3CalmE4CalmN3Calm

Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of    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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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.