Friday, June23, 2017 L-36.com


Marine Weather and Tides
Bethel Park, PA

Version 3.4
What's New / NOTES
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 5:49AMSunset 8:55PM Friday June 23, 2017 4:47 PM EDT (20:47 UTC) Moonrise 4:33AMMoonset 7:25PM Illumination 0% Phase: New Moon; Moon at 29 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 Bethel Park , PA
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location: 40.34, -80.02     debug


Area Discussion for - Pittsburgh, PA
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Fxus61 kpbz 231739
afdpbz
area forecast discussion
national weather service pittsburgh pa
139 pm edt Fri jun 23 2017

Synopsis
Downpours are possible through tonight with a tropical airmass
in place. A cold front sweeping through early Saturday will
return comfortable humidity levels by the weekend. Below normal
temperatures greet us early next week.

Near term through tonight
Widespread area of rain continues to impact the northern part
of the forecast area. The forecast has not changed much with
the 12z NCEP suite. Heaviest rain axis has shifted slightly
north into southwestern pa mostly along and south of us 40 where
potentially upwards of 3.5" of rain could fall. The remaining
part of the hydro discussion including rivers can be found in
the hydro section near the end of this product.

Severe threat remains a concern as a dry slot is working its
way up the ohio river into parts of southeastern ohio and
northern west virginia. This will allow the atmosphere to
destabilize and potentially foster development of bowing
segments that are capable of producing damaging winds. Forecast
soundings illustrate wind as the primary threat. Hodographs are
not too impressive given mostly speed shear, however if a storm
deviates to become a right mover then a weak tornado is
possible. Reviewing cips analogs for this scenario, they portray
a non zero tornado threat due to several of the top analogs
showing 1-2 tornadoes happened. This is further supported by
updraft helicity fields from experimental ncar 3km cam. At this
time, any severe weather should be along and south of the
clearing that will be working into northern WV and southern pa.

Pops will be categorical most of the night as a slug of rain
moves through. Very little change to the grids other than to
speed up timing of the back edge.

Short term Saturday through Monday night
Dry and less humid air will be welcome news for many this
weekend as dewpoints drop into the 50s! Northwest winds behind
the baroclinic zone will clear out the sky during the morning,
however moisture will be on the increase as a fast moving
shortwave trough crosses during the evening hours. The column is
fairly dry, so no measurable QPF is foreseen Saturday. Dry
weather continues for the second half of the weekend despite
less sunshine. Yet another passing short wave will bring clouds
and given its stronger than the one Saturday isolated showers
are possible north of the i-76 corridor in the late afternoon
early evening hours Sunday.

Mid level heights continue to fall as we kick off a new work
week. Most of the energy will reside along the lakes, so precip
chances are small over northern WV and western md when compared
to northwest pa. Any shower will be brief. The bigger story is
the spring like feel as daytime high temps do not leave the 60s
Monday! This will be almost 15 degrees below normal.

Long term Tuesday through Friday
Highlights:
- cool start - warm end temp wise
- unsettled weather returns Friday
- no heat waves or high water threat
mid level heights increase with a ridge building into the
eastern united states. This will bring temps back to normal
levels by Thursday and above normal by a week from now.

Aviation 18z Friday through Wednesday
Tropical moisture will continue to stream northward ahead of an
approaching cold front this afternoon. Interaction with the
aforementioned front and digging shortwave will support periods
of rain and an increasing chance for thunderstorms through the
afternoon. Confidence in widespread MVFR and brief ifr
visibility restrictions is high for the remainder of the day in
periods of heavy rain, with the expectation that ifr CIGS will
lift over most terminals this afternoon. Some thunderstorms may
be severe, with strengthening shear jet support, which could
result in strong severe gusts at terminals this afternoon.

Restrictions will likely continue tonight as the remnants of
cindy pass along the pa WV border. CIGS may fall back to ifr
after sunset with some fog possible with saturated conditions.

But, improvement is expected by Saturday morning as surface
ridging builds overhead.

Wsw wind will remain gusty through the afternoon and again
tomorrow.

Outlook
Upper trough may bring occasional restrictions Sun and Mon in
afternoon showers storms.

Hydrology
The flash flood watch remains on track. The axis of highest qpf
has shifted a little north to far southern pa where 24 hour
amounts in excess of three inches are possible. Hrrr shows a
several hour period of moderate to heavy rainfall thankfully it
is across a region that was not impacted by the nearly 4-6" of
rain that fell in parts of indiana county last evening.

Warm rain process and pre setup remain in place. Pwats are
pushing two inches while warm cloud depths are in excess of
13kft. The low level jet continues to pump moisture from cindy
into our region. All of these point to enhanced convergence
ahead of the front.

River forecasts have been tweaked upward across Mon and
headwaters of ohio river. We still do not have any forecast
points going to flood, but pittsburgh, elizabeth, and charleroi
are predicted to reach action stage.

Pbz watches warnings advisories
Md... Flash flood watch through late tonight for mdz001.

Oh... Flash flood watch through late tonight for ohz057>059-068-069.

Pa... Flash flood watch through late tonight for paz021>023-029-031-
073>076.

Wv... Flash flood watch through late tonight for wvz002>004-012-021-
509>514.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA5 mi54 minSW 8 G 211.25 miThunderstorm in Vicinity Heavy Rain Fog/Mist73°F69°F87%1004.6 hPa
Pittsburgh, Pittsburgh International Airport, PA16 mi56 minWSW 810.00 miLight Rain74°F72°F94%1004.8 hPa

Wind History from AGC (wind in knots)
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Last 24hrSW16
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S10S10S6S5S6S8SW8SW11SW12S8S7S6S5S6SW6SW8SW10S10
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1 day ago6NW5NW4NW4W4W3SW6NW4CalmCalmS4S4S4S4S5S5S9S4SW7SW9SW10SW9S10S14
2 days agoW11
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SW10SW9S5S6S5S7S6S7S83S4CalmS6CalmW3SW6W8W6
G15
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NW6NW7

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
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Pittsburgh, PA (16,3,4,5)
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Ground Weather Radar Station Pittsburgh, PA
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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.