Thunderstorm Wind in Lewis County, New York

Microburst #2, was determined to be caused by straight line winds in the range of 95 to 105 mph. The damage occurred shortly after 2 pm local time across a small area off of Johnson Road just off NY 12 in Glenfield The most notable damage occurred in the front yard of a property where multiple hardwood trees were snapped and uprooted. Additionally, the tin roof of the home was partially peeled upwards, with some damage to the garage door as well.

On June 30, 2026, an oppressive tropical airmass fueled by extreme heat warnings collided with a sharp mid-level shortwave across the NWS Buffalo CWA, prompting the Storm Prediction Center to issue a Severe Thunderstorm Watch as strong boundary-layer destabilization produced widespread severe convection across Central New York and the North Country. NWS Buffalo Area Forecast Discussions highlighted surging moisture and extreme instability that unleashed powerful multi-cell clusters and isolated supercells, leading to severe straight-line microbursts with winds up to 100 mph and an EF-1 tornado touchdown in Lewis County. Concurrently, deep warm-cloud processes and precipitable water levels approaching 2.0 inches fueled torrential precipitation efficiency, driving Weather Prediction Center Excessive Rainfall concerns for localized flash flooding in poor-drainage areas. As the pre-frontal convective line swept east toward nightfall, loss of daytime heating and post-frontal drying rapidly stabilized the region, bringing an end to the severe weather threat into the overnight hours.