Severe thunderstorms will again threaten the northern Plains tonight into Monday as a front stays stalled over the region. Through tonight, areas from Nebraska and southeastern South Dakota into southern Minnesota and Iowa will be at the greatest risk.
Meanwhile, areas of west-central Minnesota, far southeastern North Dakota and northern Wisconsin that were just hit by tornadoes Saturday will catch a break from severe weather tonight. These places could, however, be at risk again by Monday night.
Nasty thunderstorms capable of producing large hail, damaging winds and tornadoes were already starting to fire up over north-central Nebraska and southeastern South Dakota by mid-afternoon Sunday.
People potentially in the path of these thunderstorms should be ready to seek shelter immediately if a severe thunderstorm or tornado warning is issued.
Overnight, the thunderstorms are expected to evolve into a large cluster, most likely over Iowa, with heavy rain becoming the main risk factor. Minor street flooding could slow traffic for the Monday morning commute in a few areas.
While the cluster of thunderstorms will weaken throughout Monday morning as it heads farther east, a new round of severe thunderstorms will break out farther west Monday afternoon.
Areas from eastern Montana to western Iowa and northeastern Colorado could all be affected. Again, damaging winds and hail will be the main threats. These thunderstorms will spread farther east through southern Minnesota, Iowa and eventually into southern Wisconsin and northern Illinois Monday night.
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U.S./Quebec border (1835)
Heavy snow; Hatley, P.Q. received 10 inches. Kelkenny, NH had 6 inches.
San Diego, CA (1970)
Strong Santa Ana winds create fire disaster in interior parts of county (September 25 to 30); 500,000 acres burned.
Lander, NY (1982)
15.4 inches of of snow (29th-30th). Total of 32.9 inches for month (Sept. record).