Pittsburgh, Pennsylvania – Eastern Ohio into western Pennsylvania could see intensifying thunderstorms this afternoon capable of damaging winds, hail, and isolated tornadoes.
According to the NOAA Storm Prediction Center, a Mesoscale Discussion issued Saturday at 11:57 AM CST indicates storms developing across the upper Ohio Valley and lower Great Lakes region may organize and strengthen through the afternoon. The discussion covers eastern Ohio, northwestern West Virginia, western Pennsylvania, and southwestern New York, where conditions are becoming favorable for severe weather.
Meteorologists say warming temperatures and increasing moisture are allowing atmospheric instability to build, with CAPE values rising above 500 J/kg. At the same time, strong winds aloft approaching 50 knots are creating an environment that could help thunderstorms intensify.
A developing boundary moving across central and eastern Ohio is already triggering storms. As the system moves northeast toward the Allegheny Plateau, thunderstorms are expected to strengthen and possibly form supercells within a developing line of storms.
The primary hazard is damaging wind gusts between 55 and 70 mph, though forecasters say hail up to about 1.25 inches is also possible. The Storm Prediction Center notes that strengthening winds roughly 5,000 feet above ground (around 850 mb) could locally enhance storm rotation.
That could allow a couple of tornadoes to develop later this afternoon, particularly between 3 PM and 5 PM EST, if storms become more organized.
The probability of a Severe Thunderstorm Watch or Tornado Watch being issued is estimated at 80 percent, according to the discussion.
Commuters and residents across the region may want to monitor forecasts closely this afternoon as storms approach during peak travel hours.
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