Marginal risk of severe storms in Utah, Ohio Valley
• The National Weather Service Storm Prediction Center has issued a marginal risk of severe thunderstorms for northern Utah and eastern parts of the Ohio Valley on Wednesday, September 16,
• A mid-level impulse is expected to bring strong winds aloft and steep lapse rates to northern Utah, creating conditions for isolated severe wind and hail. Meanwhile, the Ohio Valley may experience rounds of showers and thunderstorms, with peak heating potentially intensifying storms. Forecast soundings suggest surface temperatures near 70°F (21°C) in Utah and 80°F (27°C) in Ohio Valley, contributing to moderate instability. Overnight, convective initiation is possible in Iowa, though severe probabilities remain uncertain. (Source: NWS Storm Prediction Center, 09/16/2026)
Impact & Risks
Residents in northern Utah and eastern Ohio Valley should prepare for isolated severe thunderstorms capable of producing marginally severe hail and damaging winds. In Utah, multicells and embedded supercells may develop due to strong winds aloft and steep lapse rates. In the Ohio Valley, pulse cellular and multicellular storms could lead to wet downbursts and isolated damaging gusts. Overnight convection in Iowa may also pose a marginal hail risk. (Source: NWS Storm Prediction Center, 09/16/2026)
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