The watch is in effect until 11 p.m. Monday, Aug. 7 in the counties shown in yellow.
In New York, those counties are:
- Sullivan
- Broome
- Chenango
- Delaware
- Otsego
- Tioga
Severe thunderstorms are expected to continue through the afternoon and in Monday evening.
"These thunderstorms will have the potential to produce damaging winds, large hail, and localized tornadoes," the National Weather Service said. "Heavy rain could cause localized flash flooding."
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