A line of severe thunderstorms swept through Northeast Ohio before 10 a.m. ET Monday, triggering a Severe Thunderstorm Warning across seven counties and a Flood Advisory for Cuyahoga County — but forecasters warn that the more dangerous threat arrives this afternoon, when a second storm wave is expected to produce damaging winds up to 60 mph (97 km/h) and heavy rain across the region, with the pattern holding through Tuesday at minimum. The National Weather Service Cleveland has the full forecast.
The morning’s first wave is already moving out. What makes Monday particularly hazardous for Northeast Ohio’s roughly 4.5 million residents is the atmospheric setup behind both rounds: a stalled frontal boundary anchored over the region, with multiple pulses of energy riding eastward along it from Indiana and western Ohio. That pattern — known meteorologically as storm training — means the storms are not simply passing through. Each wave follows roughly the same corridor, and each one delivers its rain and wind to the same communities, according to the News 5 Power of 5 team.
Seven Counties Under Severe Thunderstorm Warning
The National Weather Service Cleveland office issued a Severe Thunderstorm Warning covering Cuyahoga, Geauga, Lake, Lorain, Medina, Portage, and Summit counties Monday morning, citing wind gusts up to 60 mph (97 km/h) and large hail as the primary hazards. A Flood Advisory for Cuyahoga County remains in effect through 11:30 a.m. ET, with ponding water and reduced visibility on roadways already reported.
FOX 8 meteorologist Scott Sabol noted Monday morning that the warning covers a line extending from western Vermilion to Wakeman, tracking east at approximately 45 mph (72 km/h). Hail the size of ping-pong balls — roughly 1.5 inches (3.8 cm) in diameter, well above the NWS’s 1-inch threshold for severe designation — was confirmed by reporters on the ground in Copley Township in Summit County, according to WKYC…