Wednesday, July8, 2020
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Marine Weather and Tides
Bethel Park, PA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:56AMSunset 8:53PM Wednesday July 8, 2020 2:46 AM EDT (06:46 UTC) Moonrise 10:34PMMoonset 8:18AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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 080453 CCA AFDPBZ

Area Forecast Discussion . CORRECTED National Weather Service Pittsburgh PA 1253 AM EDT Wed Jul 8 2020

SYNOPSIS. The pattern of warm temperature with scattered afternoon and evening thunderstorms will persist through Friday. A weak cold front will increase rain chance for the weekend.

NEAR TERM /THROUGH TODAY/. The midnight update featured POP reduction as residual showers are dying quicker than anticipated. Dry weather and patchy fog can be expected through the morning hours. Lows are expected to range from 5 to 10 degrees above average.

Increased ridging will support another warm day with highs again about 10 degrees above the early-July calculated-normals. Convection potential is expected to be limited though given that broad ridging and increased mid level warmth; however, weak easterly surface flow converging into the ridges with upper support via undercutting short- wave troughing sliding subtly toward the Mid Atlantic Region should be sufficient to generate deep, moist, orographic convection. Those storms are expected to generate outflow which should pop additional activity in the late afternoon warmth and humidity for areas immediately east of the higher terrain. Precip probs. were focused and cumulated in likely numbers for this scenario, with chance numbers included also for areas north of I 80 for limited "lake breeze" penetration. Elsewhere, an isolated mention was maintained for possible storm formation on old outflow or micro-boundaries.

Given a very weak wind field, severe potential will be limited to isolated wind gust potential given dry air aloft, but that will be limited itself by mid level warmth and evaporative cooling of updrafts. With storms that sustain, locally heavy rain will again be possible with precipital water on the order of 1.5 inches combining with little or no element movement, but rain into updrafts should also retard storm life with convection sustenance thus becoming outflow dependant.

SHORT TERM /TONIGHT THROUGH SATURDAY/.

Higher pressure returns on Thursday as the upper ridge axis crosses the region. This will lower, but not eliminate, afternoon convection chances. Have maintained slight chance thunder for much of the area, with higher chance PoPs across the WV/MD ridges.

LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/. The long term period marks an eventual transition to cooler temperatures and more unsettled weather as upper troughing digs across the Great Lakes and Upper Ohio Valley into the weekend. Friday/Saturday will feature better organized and more widespread rain chances with crossing shortwaves in advance of a frontal passage on Saturday.

Temperatures will moderate back towards average through the weekend into early next week, with highs in the lower 80s by Sun/Mon.

AVIATION /04Z WEDNESDAY THROUGH SUNDAY/. MVFR to IFR fog and stratus is expected late tonight, especially for ports that saw rain today, with the low lvl moisture in place. This should dissipate after sunrise Wed with VFR expected, though another, weaker shortwave trough and daytime destabilization should result in sct aftn tstms.

Outlook. VFR is expected to prevail, with exceptions for daily sct aftn and eve convection.

CLIMATE. Based on the 30-year climatological average, here is the "normal" number of 90-degree days per year at each of the local climatic sites:

Pittsburgh: 6.9 days Morgantown: 8.0 days Wheeling: 5.0 days Zanesville: 10.0 days Dubois: 1.0 day

90F+ temperatures are still forecast through Friday, barring interference from well-timing thunderstorms. Based on historical stretches of 90F days, here is a summary of the most-recent such stretches at each site:

Pittsburgh (7/3-7/10/2020): prior 8-day stretch ended 8/20/1995 Morgantown (7/2-7/10/2020): prior 9-day stretch ended 8/4/1995 Wheeling (7/4-7/10/2020): prior 7-day stretch ended 7/27/2016 Zanesville (7/4-7/10/2020): prior 7-day stretch ended 7/8/2012 Dubois (7/5-7/10/2020): would be longest 90F stretch at DUJ.

Dubois most recently had a 5-day stretch of 90F days ending 7/23/2011. Dubois also is the site with the greatest potential variability in the forecast maximum during this forecast period, and therefore the most likely not to reach 90F on any given day.

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, PA5 mi1.9 hrsN 010.00 miFair70°F66°F90%1015.4 hPa
Pittsburgh, Pittsburgh International Airport, PA16 mi1.9 hrsN 410.00 miMostly Cloudy69°F66°F93%1015.7 hPa

Link to 5 minute data for KAGC

Wind History from AGC (wind in knots)
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Last 24hrCalmSE6CalmSE3SE3S6S7SW36SE5SW8S9SW8
G15
3--N12
G24
NW6SE8CalmSE5S7S7CalmCalm
1 day agoSW7CalmCalmS4S7CalmSE3SE5S6S8W8SW5W3SW7W75--NW5N4N4N3NE3E3Calm
2 days agoN3N3CalmN3CalmCalmCalmCalmCalmCalmCalmCalmW6Calm35S3S4W6W4E3SE5S6S7

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Pittsburgh, PA (2,6,7,8)
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Ground Weather Radar Station Pittsburgh, PA
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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 numerous 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.