Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Whitaker, 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 6:05AMSunset 8:46PM Thursday July 20, 2017 6:40 PM EDT (22:40 UTC) Moonrise 2:20AMMoonset 5:04PM Illumination 8% Phase: Waning Crescent; Moon at 27 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 202203
afdpbz
area forecast discussion
national weather service pittsburgh pa
603 pm edt Thu jul 20 2017

Synopsis
Strong to severe thunderstorms remain possible this afternoon
and evening ahead of a front. After a relatively quiet Friday, a
wet weekend appears likely, perhaps with more strong storms
Saturday.

Near term through Friday
A weak frontal boundary is moving southeastward into the area
and should gradually stall overnight. Showers and thunderstorms
are forming along this boundary as well as along outflow induced
by the ongoing thunderstorm activity. While bulk shear will
increase later in the evening, RUC rap hrrr soundings reveal
fairly pedestrian shear at the moment, and with a fairly
noticeable warm wedge at 20 kft, instability is not really
impressive. CAPE values have jumped into the 1000-2000 j kg
range, but with little positive area aloft and a high freezing
level, this should continue to preclude a hail threat. Further,
with shear generally lagging the boundary and most ongoing
activity, and wind gust potential will likely be fairly pulsey
rather than organized. Thus, while many areas will see
thunderstorms this evening, the risk of severe weather seems
largely diminished at this time.

Convective debris and a soupy boundary layer should keep
temperatures up well above climo at all sites overnight. Fries

Short term Friday night through Sunday
Will hang on to some slight chance pops on Friday across the
southern counties as there is still a touch of uncertainty just
how far south the boundary will be pushed by tonight's
activity. The models also look a touch slower with the next wave
in the northwest flow pattern, and have backed off precip
chances a bit here.

The weekend looks wet, as great lakes low pressure passes to the
north, and several shortwaves run down the northwest flow. Flow
over our area turns more zonal by Sunday, which will slow
progression of the associated frontal boundary. Kept likely pops
going through this period with several rounds of rain expected.

Rainfall totals will have to be watched for problematic areas.

Additionally, there appears to be a risk for severe storm
Saturday, especially if some cloud breaks can form, given decent
mid-level flow.

Temperatures will start a slow fall this period, held in check
by the clouds and rain. Minimal changes were made.

Long term Sunday night through Thursday
A general great lakes northeast u.S. Trough will be carved out
by Monday, with this pattern holding into mid-week. Temperatures
will fall back to near or just below normal during this period.

After lingering precipitation Monday, Tuesday and Wednesday
appear dry at this distance. A return to northwest flow may
herald increasing rain chances Thursday.

Aviation 22z Thursday through Tuesday
High confidence forecast save for the onset and duration of
thunderstorms this afternoon and early evening. These times
could vary by 2-3 hours and flight category between 6-12z
Friday.

An upper level disturbance crossing this afternoon will bring a
line of strong to severe storms moving from north to south
affecting likely all terminals if it develops like many of the
high resolution models indicate. Inserted vcts for all terminals
starting around 20z north and 0z south of the mason dixon line.

Brief restrictions to ifr vis can be expected if an airport is
impacted by a storm. In wake of the storms, last 6-9 hours of
forecast its hard to tell if MVFR fog will develop or will there
be a canopy of stratocu or justVFR? For now, rolled with an
optimistic forecast no CIGS below 030.

Outlook
Additional rounds of storms are expected through the weekend,
and morning fog is possible as well.

Pbz watches warnings advisories
Md... None.

Oh... None.

Pa... None.

Wv... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA4 mi50 minVar 3 G 250.50 miHeavy Rain73°F66°F81%1015.3 hPa
Pittsburgh, Pittsburgh International Airport, PA19 mi50 minSW 128.00 miLight Rain76°F72°F88%1015.5 hPa

Wind History from AGC (wind in knots)
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Last 24hr5NW4W5SW5W5W6W6W3SW4S4SW5CalmS4S4SW6W12W11W10SW14W9SW9W7
G18
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1 day agoN3CalmCalmCalmCalmCalmCalmSE3S3S3S6S4S5S5S3S4SW9W6SW9
G14
W8W766W8
2 days agoNW5NW43N43NE3CalmCalmN4N3N4--N33CalmCalm44SE33W35NW5Calm

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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Weather Map
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Pittsburgh, PA (18,4,5,8)
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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.