Thursday, July29, 2021
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Marine Weather and Tides
Thornburg, PA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:13AMSunset 8:39PM Thursday July 29, 2021 5:20 PM EDT (21:20 UTC) Moonrise 10:58PMMoonset 11:02AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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 Thornburg , PA
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location: 40.44, -80.08     debug


Area Discussion for - Pittsburgh, PA
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FXUS61 KPBZ 291737 AFDPBZ

Area Forecast Discussion National Weather Service Pittsburgh PA 137 PM EDT Thu Jul 29 2021

SYNOPSIS. Showers and thunderstorms will be crossing the area today with the passage of a cold front. High pressure returns dry and seasonably cool conditions for the first half of the weekend.

NEAR TERM /THROUGH TONIGHT/. A shortwave will finish its exit through the region shortly, pushing most convection east while leaving a residual trail of cloud cover. Though storms may continue north of I-80 due weak sfc convergence, the main focus will be on scattered shower and thunderstorm development ahead of an approaching pre-frontal trough this afternoon and early evening.

Storms could become severe with damaging wind and large hail the primary threats in part due to abundant shear and increasingly dry mid-level air. However, there are two factors that may limit the threat, keeping confidence low that one even develops. The first factor is waning upper support as the sfc feature lags behind the exiting shortwave; more limited storm coverage is the likely outcome of this. The other factor is instability, or the lack thereof, at the moment given excessive cloud cover from this morning's convection. Very simply: more heating/destabilization is needed to foster robust storm development and tap into the shear/dry air to create the severe threat.

Overnight, additional weak shortwaves and the passage of the sfc cold front may aid iso/sct showers with localized thunder. Otherwise, drier conditions are expected due to building high pressure and dry, cold advection.

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. High pressure will slowly build in from the northwest on Friday with dry conditions expected through Saturday. Temperatures will run below seasonal averages under cold advection.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Another shortwave within the broad eastern U.S. upper trough will push a weak sfc cold front through the region Sunday, increasing precipitation chances.

High pressure should resume influence over the upper Ohio River Valley heading into next week under weak upper troughing, with temperature near to slightly below seasonal averages.

AVIATION /18Z THURSDAY THROUGH TUESDAY/. Initial activity associated with a shortwave trough/MCV is currently exiting the region, with MGW/DUJ possibly keeping a brief restriction right at TAF time.

Another round of at least scattered showers and thunderstorms are expected to develop in association with a pre-frontal trough during the afternoon. Uncertainty regarding storm coverage and intensity remains, and depends on the degree of destabilization that we can achieve. Still, elected to keep a period of VCTS for several hours, and tried to time the most likely period of impact in TEMPO groups at the terminals. A direct hit will likely result in a brief period of IFR/LIFR visibility and perhaps strong wind gusts.

Activity should dissipate/move off this evening with the departure of the trough and the loss of instability. As the cold front drops across the region overnight, a period of MVFR ceilings and mist is possible at most terminals. Once daytime mixing commences on Friday, ceilings will likely break, and VFR conditions and light northwest wind will develop by midday.

Outlook. Restrictions are possible with a Sunday cold front.

PBZ WATCHES/WARNINGS/ADVISORIES. PA . None. OH . None. WV . None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh, Pittsburgh International Airport, PA9 mi30 minWSW 8 G 1610.00 miOvercast79°F70°F74%1010.2 hPa
Pittsburgh - Allegheny County Airport, PA10 mi28 minSW 13 G 207.00 miMostly Cloudy80°F70°F71%1010.2 hPa

Link to 5 minute data for KPIT

Wind History from PIT (wind in knots)
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Last 24hrN10W8NW8W5W3SW3W4CalmW3CalmCalmCalmCalmCalmCalmSW7SW8SW10SW9SW8SW9SW12
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1 day agoNW10
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NW9NW8W5W4W3CalmW4NW4CalmCalmCalmCalmCalmCalmCalmSE33W5CalmNW8CalmNW8W9
2 days agoNW11NW8NW10N7NW4N5CalmCalmCalmW4W3SE3CalmCalmCalmCalmSW3W7W5W8W7W8W8W9

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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