A tornado with wind speeds estimated from 70 to 80 miles per hour touched down on the Hanford Nuclear Reservation near Rattlesnake Mountain on Wednesday evening, lasting just a few minutes before dissipating.
Mike Vescio, a meteorologist with the National Weather Service’s Pendleton office, said a damage assessment would not likely be performed because the area is relatively remote.
Vescio said the tornado registered as an EF-0 on the Enhanced Fujita scale, meaning it had sustained winds of 65 to 85 mph.
He said a strong upper-level, low-pressure system moved into the area and caused a strong wind sheer. That, combined with moderate instability and a rotating thunderstorm, caused the tornado.
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Vescio said they don’t anticipate more tornadoes in the region.