940 FXUS61 KPBZ 100855 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 455 AM EDT Tue Jun 10 2025 .SYNOPSIS... High pressure will provide quiet weather with lower humidity through Thursday, though a few isolated showers are possible across the ridges today. Rain chances return Friday and on into the weekend. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Lingering showers will exit through dawn. - Patchy morning fog possible. --------------------------------------------------------------- As clearing from the west commences, patchy fog will be possible with lingering surface moisture. Morning lows will fall into the mid-50s to low-60s. High pressure will begin to build today as broad upper troughing crosses from the Great Lakes into the Northeast. Cold advection and northwest flow aloft will keep afternoon temperatures a few degrees cooler, but still in the 70s for most. Plentiful sunshine is expected through fair weather Cu. Lingering moisture across the ridges and some orographic lift may allow a few showers and thunderstorms to develop there with afternoon heating. Maintained Chance/Slight Chance PoPs for this. Overnight temperatures will fall back into the 50s (near normal) under mostly clear skies. && .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... KEY MESSAGES: - Dry and less humid weather with a warming trend ---------------------------------------------------------------- Dry weather continues Wednesday and Thursday as high pressure builds under northwest flow aloft. Low-level winds will become more southwesterly as the sfc high becomes centered over the Ohio Valley. This will aid warm advection, and with sunny skies, will drive afternoon highs back into the lower 80s on Wednesday and . However, lower humidity (dews in the 50s to near 60F) will make for warm, but pleasant weather. By Thursday, highs will push into the mid-80s for many as dew points push into the 60s. && .LONG TERM /FRIDAY THROUGH MONDAY/... KEY MESSAGES: - Rain chance returns Friday through Monday ------------------------------------------------------------------- Westerly flow with heights in the middle 580s is expected through the long term. Confluent flow pattern aloft northeast of the central US trough should keep high pressure over the Great Lakes area and set up a slow moving west-east frontal zone in the Ohio Valley which will gradually allow for moisture pooling and destabilization during the period. Flow does weaken and vertical wind shear would support weakly organized convection during the period, so overall organized severe threat appears limited. With weaker wind fields the focus would shift to slow moving and locally heavy pulse to multi-cell storms that are mainly diurnally driven. && .AVIATION /09Z TUESDAY THROUGH SATURDAY/... Expect showers and thunderstorms to continue through the overnight across northern WV and some of the southwestern PA counties. This will mainly impact the MGW, LBE, and DUJ terminals and will keep VCTS in the TAFs for these locations. Some of the other terminals will see some MVFR and IFR cigs and vis through dawn due to fog and stratus. This is expected to improve by 14Z to 16Z tomorrow. Expect mid and upper level clouds in place tomorrow. Winds will be light and variable to begin with but will begin to gust from the west up to 20 knots in some of the terminals. Outlook... High pressure and weak flow aloft is favored to maintain VFR and dry weather through the bulk of the day Thursday. Weak disturbances within the upper flow may bring increased precipitation chances Friday into the weekend. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && $$ SYNOPSIS...Rackley NEAR TERM...Rackley SHORT TERM...Rackley LONG TERM...Craven/Rackley AVIATION...Shallenberger