Area Forecast Discussion
Issued by NWS Pittsburgh, PA
Issued by NWS Pittsburgh, PA
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992 FXUS61 KPBZ 121025 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 525 AM EST Wed Nov 12 2025 .SYNOPSIS... A weak disturbance will bring a mix of snow and rain to the northern and eastern portions of the region today. High pressure will promote dry weather and more seasonable temperature to end the week. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Snow, then a rain/snow mix, with a passing disturbance, favoring I-80 and the ridges. - Gusty winds to continue --------------------------------------------------------------- Though a few occasional flurries continue, measurable snowfall has come to an end across the area early this morning. Satellite shows skies beginning to briefly clear for eastern Ohio just into SW PA, but this will be short-lived as a mid-level deck quickly fills in upstream. PoPs will increase again early this morning as a weak surface trough and eventual weak cold front cross the area. Chances remain highest north of Pittsburgh and especially along the I-80 corridor and in the PA ridges. Given thermal profiles, scattered showers will begin as snow this morning, mixing with rain as temperatures warm late morning and afternoon. Any additional snow accumulation should be negligible, limited to a few tenths at most along the I-80 corridor. Probabilities for even 0.5" are less than 10%. Increasing temperature and rain on fresh snowpack is likely to produce periods of fog this afternoon and overnight. Lingering showers may transition back to snow overnight as temperatures again cool, but any remaining moisture will be fleeting as the trough exits east. Gusty conditions will continue today as the pressure gradient tightens. Westerly wind gusts will max out around 35 mph for most of the area, near 40 at times in the higher terrain. Highest gusts are expected across eastern Tucker County, WV, which may near Wind Advisory criteria at times. Afternoon highs will run about 10 degrees warmer than Tuesday for most of the area, which is roughly 5 degrees below average. Overnight lows will dip into the lower 30s. && .SHORT TERM /THURSDAY THROUGH FRIDAY/... KEY MESSAGES: - Dry weather with moderating temperature Thursday and Friday ---------------------------------------------------------------- Broad surface high pressure will build across the Southeast Thursday and Friday with gradually rising heights aloft under northwesterly flow. This will keep mainly dry weather in the forecast, though a few isolated rain/snow showers will be possible across the I-80 corridor early Thursday. Temperatures will moderate, gaining a few degrees on Thursday, then pushing to near-normal on Friday as highs top out in the upper 40s and lower 50s. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... - Precipitation chances (mainly rain) return this weekend - Pattern uncertainty increases early next week; low rain chances and near to slightly below-normal temps best forecast for now ------------------------------------------------------------------- Long range ensembles generally agree on increasing rain chances this weekend as an upper level wave crosses with an accompanying broad surface low and cold front. Shower chances (rain) slowly increase as early as late Friday night into Saturday as a warm front lifts across the area. However, more widespread rain chances return Saturday night into Sunday with the crossing cold front. Details become murkier early next week. Some solutions hold on to ridging longer by developing a cutoff upper low to our west and slowing the pattern down, which would keep us a bit warmer. Meanwhile, others feature an Upper Midwest shortwave knocking down the ridge somewhat on Sunday, which would lead to another cooldown. For now, the forecast of least regret appears to be continued precipitation chances from Sunday into early next week given the uncertainty, along with a drop to slightly below normal temperature, but not as cold as early this week. At this time, another round of early-season winter weather does not appear to be in the cards through Tuesday. && .AVIATION /09Z WEDNESDAY THROUGH SUNDAY/... VFR BKN/OVC coverage are ongoing at all terminals to start the TAF period. Latest forecast guidance has trended farther in regards to where the deeper moisture is expected this morning and afternoon, so have removed precipitation from the forecast from PIT and ports to the south. Those locations will likely see VFR through the TAF period and minimal if any precipitation given the dry low levels evident in latest forecast soundings. Latest ensemble guidance shows a 0-5% chance of precipitation and a 10-30% chance of MVFR cigs today. North of KPIT, MVFR cig chances increase gradually to the north up to 80% for FKL/DUJ...likewise for precipitation, increasing to a 30% chance on average at FKL/DUJ late this morning and afternoon. IFR cig chances are 20-30% at these sites and nil KPIT and south. Lastly, have update TAFs early this morning from the 06Z issuance to remove mention of LLWS as most obs sites across the region have been showing higher sfc winds/gusts that would suggest winds in the boundary layer below the inversion should be strong to limit LLWS potential. Will keep monitoring and make adjustments if needed. Outlook...Any lingering showers along and north of the I-80 corridor may transition back to snow overnight as temperatures drop, but any accumulation would be minimal. Thursday and Friday will be largely VFR across the region, except for FKL/DUJ where flow off the lakes could result in some MVFR stratocu. Ensemble guidance shows a 30% chance up until Friday morning when a large central CONUS ridge begins to impact the region. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && $$ SYNOPSIS...Rackley NEAR TERM...Rackley SHORT TERM...Rackley LONG TERM...Rackley/CL AVIATION...88