JEFFERSON COUNTY, Mo. - A tornado warning has been issued in parts of Jefferson, St. Francois, Washington counties through 7:30 p.m. CT Saturday.
TORNADO WARNING
When the National Weather Service issues a tornado warning, a radar has detected rotation or that there has been a tornado sighting and you should take shelter immediately.
TORNADO WATCH
In the case of a tornado watch, atmospheric conditions are favorable for a tornado to develop, but a tornado has not yet been sighted or indicated by weather radar.
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