severe weather

Crews work to clear the snow from Highway 4 west of Bruning, Nebraska. (Photo courtesy of Nebraska Department of Agriculture.)
A sharp contrast in the air masses causes severe weather—thunderstorms and tornadoes. The contrast can be in temperature or in the amount of moisture, particularly if there is a dry line of air behind the storm system, said K-State climatologist Mary Knapp. (Courtesy photo taken near Manhattan, Kansas, by Dan Donnert.)

Severe weather looms; make plans now to stay safe

(Texas A&M AgriLife photo.)