All three were Enhanced Fujita (EF)-0 twisters (the weakest of the five levels on the Enhanced Fujita Scale),
At about 11:40 a.m. on Monday, Aug. 23, an EF-0 tornado with estimated peak winds of 65 mph caused minor damage in the area of Marlborough, in Middlesex County, NWS reported.
The damage included trees down on cars and lofted debris.
NWS also reported that another EF-0 tornado touched down in Worcester County, in the Town of Bolton at 12:30 p.m., and then another EF-0 tornado touched down at 1:10 p.m. in Stow, in Middlesex County.
The weather service said no one was injured.
Enhanced Fujita Scale classifies tornadoes into five categories:
- EF0 - Weak, winds of 65 to 85 mph
- EF1 - Weak, winds of 86 to 110 mph
- EF2 - Strong, winds of 111 to 135 mph
- EF3 - Strong, winds of 136 to 165 mph
- EF4 - Violent, winds. of 166 to 200 mph
- EF5 - Violent, winds of more than 200 mph
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