


Area Forecast Discussion
Issued by NWS Pittsburgh, PA
Issued by NWS Pittsburgh, PA
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866 FXUS61 KPBZ 030822 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 422 AM EDT Thu Jul 3 2025 .SYNOPSIS... The region will be under the influence of high pressure through the next few days. Fog development is possible during the morning each day. A trough will drop south into the area bringing a chance of unsettled weather today. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Morning patchy valley fog. - Isolated showers and thunderstorms --------------------------------------------------------------- The area will still be under the influence of high pressure through the day. The morning will begin with some fog potential but will likely dissipate by the 12Z to 14Z timeframe. A trough will sag south through the area by the afternoon and into the evening. This will bring around of showers and thunderstorms to the area. The NBM gives a 30% chance of thunderstorms over the area, mainly over the ridges to the east. The timing for the potential will be between 20Z and 03Z. Initiation seems a bit late in the evening but the SB CAPE isin`t the greatest either with some 50% to 70% NBM probs of 1000 J/Kg. Will highlight this as a sliver of the forecast area is in a Marginal Risk for wind. Heading into the overnight, a lingering shower or storm can`t be ruled out. High pressure will take over again with clearing skies Thursday night. The potential will fog will be present again with the impacts mainly in river valleys. Temperatures are expected to be near normal. && .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... KEY MESSAGES: - Dry and sunny weather for the Fourth. - Temperatures a few degrees above average. ---------------------------------------------------------------- Sfc high pressure and ridging aloft should promote mainly dry and warm weather again Friday and continue into 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. This will highlight the potential on Saturday as the highs for Friday will only make it into the mid 80s. Temperatures are expected to be above normal for the highs and the lows. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... KEY MESSAGES: - Increasingly hot and humid with shower and thunderstorm chances returning Sunday and Monday. - Post frontal rain chances remain on Tuesday and Wednesday. ------------------------------------------------------------------- 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. Temperatures are expected to relax for the Tuesday and Wednesday period. This will be due to the passage of a cold front Monday night. This will allow cooler air into the region with the potential of some lingering chances for precip behind the front. There is a lack of confidence with this patterns so the 30% to 40% pops were left in the forecast. && .AVIATION /07Z THURSDAY THROUGH MONDAY/... As expected many clouds have dissipated and left us with largely clear skies and VFR prevailing at all ports. VFR is expected to be the rule today, with few exceptions in fog this morning. Fog is expected to be less widespread than Wednesday with the most likely impacts being east of Pittsburgh. Have maintained the mention for LBE and lowered MGW from prevailing to a TEMPO for any MVFR/IFR impacts in fog this morning. Valley fog impacts are expected to wind down by 13z, with scattered to broken VFR cu replacing it. Isolated storms may pop along a cold front dropping south through the region this afternoon but POPs remain rather low. DUJ maintains the greatest chance to see storms and have continued their PROB30. FKL and LBE would be the next most likely impacted ports but chances are low enough to preclude TAF mention. Light and variable wind overnight will take on more of a northwesterly direction under 10 knots by late morning. Outlook... VFR is expected through Sunday as high pressure moves across the region, with precipitation chances and isolated restrictions potentially returning Monday.&& .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && $$ SYNOPSIS...Shallenberger NEAR TERM...Shallenberger SHORT TERM...Shallenberger LONG TERM...LL/Shallenberger AVIATION...AK