ROMEOVILLE, Ill. (AP) — Up until recently, six short-lived EF1 tornadoes spawned by two storms that tore through northern Illinois on June 30 might have been all but invisible to the National Weather Service.

The closest, which touched down briefly between Plainfield and Romeoville, was “embedded” in the storm front, said Matt Friedlein, a meteorologist with the National Weather Service’s Romeoville office. Another happened near Morris.