


Area Forecast Discussion
Issued by NWS Pittsburgh, PA
Issued by NWS Pittsburgh, PA
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-- Discussion containing changed information from previous version are highlighted. --735 FXUS61 KPBZ 021806 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 206 PM EDT Wed Jul 2 2025 .SYNOPSIS...-- Changed Discussion --Mostly dry conditions are expected today outside of a isolated shower. Isolated thunderstorms are expected Thursday afternoon, with dry weather for the Fourth and Saturday. Temperatures will gradually climb into the lower 90s through the weekend into the start of next week.-- End Changed Discussion --&& .NEAR TERM /THROUGH TONIGHT/...-- Changed Discussion --KEY MESSAGES: - Mostly dry conditions today. - Temperatures in the low to mid 80s. --------------------------------------------------------------- Mostly dry and quiet conditions are expected today. There is a low probability (about 30%) for an isolated shower/thunderstorm or two late this afternoon following the peak heating period. The region looks to remain capped with elevated dry air, however, some light northwesterly wind this afternoon could bring in some moisture from Lake Erie. This combined with some buoyancy could produce some isolated showers. With the loss of daytime heating, the slight chance for showers will decrease and dry weather expected tonight. After cooler temperatures Tuesday, area highs will be back in the low to mid-80s for most. Lows will be near-average.-- End Changed Discussion --&& .SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...-- Changed Discussion --KEY MESSAGES: - Slight chance for showers and thunderstorms Thursday, mainly in the northern PA counties. - Dry and sunny weather for the Fourth. - Temperatures a few degrees above average. ---------------------------------------------------------------- A trough and its associated surface cold front, is expected to track southeastward across the Upper Ohio Valley region on Thursday. Very dry air aloft will likely inhibit updraft growth, limiting the chance for showers and thunderstorms. Still, isolated thunderstorms are possible (30%-45% chance) over the following PA counties: Forest, Venango, Butler, eastern Mercer, Clarion, Jefferson, Armstrong, Indiana, and northeastern Allegheny. Given the dry air aloft and substantial surface-based CAPE, there will be a conditional threat for downbursts IF more robust updrafts are able to develop. Machine learning guidance does marginally support a low-end severe weather threat as well. Will continue to monitor this threat. Any convection will quickly diminish after sunset with loss of daytime heating. Afternoon temperatures forecast to be few degrees above seasonal average, while temperatures Thursday night may drop a degree or two below average. Beautiful weather looks to be in store for the Fourth with sfc high pressure and ridging overhead. Models do develop a few isolated diurnal showers and thunderstorms in Ohio, but this is likely to remain west of Coshocton and Muskingum counties. Otherwise, the forecast looks great for outdoor plans and evening fireworks. Temperatures will run no more than 5 degrees above average under partly to mostly sunny skies, and heat indices in the mid to upper 80s outside of the ridges. Temperatures fall back to near-normal Friday night.-- End Changed Discussion --&& .LONG TERM /SATURDAY THROUGH WEDNESDAY/...-- Changed Discussion --KEY MESSAGES: - Dry on Saturday. - Increasingly hot and humid with shower and thunderstorm chances returning Sunday and Monday. ------------------------------------------------------------------- Sfc high pressure and ridging aloft should promote mainly dry and warm weather again Saturday. Rising heights and southerly flow should boost area highs into the upper 80s to near 90F. NBM probs for 90F are highest across eastern Ohio, northern West Virginia panhandle, and the Pittsburgh urban heat island (70%-85%). For other areas, probabilities are generally around 35%-45% or lower in the higher elevations. The ridge is then progged to flatten Sunday into early next week, with westerly flow aloft across the Upper Ohio Valley region. Disturbances embedded in this flow aloft are expected to periodically cross the region, with daily shower and thunderstorm chances returning. On Sunday and Monday, 500 mb heights are still expected to approach 590 dam, bringing hot and humid conditions across the region. High probability (70%-90%) of maximum temperatures at or above 90 degrees on Sunday and Monday. The chances of Heat Advisory criteria remain low as heat indices remain in the 90s.-- End Changed Discussion --&& .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... Scattered diurnal CU will dissipate this evening with loss of daytime heating. High clouds are expected to begin to increase overnight ahead of an approaching cold front. Winds will be light with an overall northwesterly component as sfc high pressure is centered west of the region. Outlook... Isolated thunderstorms are possible with a Thursday cold front. A lack of available moisture with the front will likely be a limiting factor in storm development. VFR is then expected through Sunday as high pressure moves across the region. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && $$ SYNOPSIS...Rackley/Lupo NEAR TERM...Lupo SHORT TERM...Rackley/Lupo LONG TERM...Rackley/Lupo AVIATION...88