There is the potential for locally damaging thunderstorms into Tuesday night from portions of western Oklahoma to part of southern Wisconsin.
Cities that can be hit by one or more thunderstorms and the potential for severe weather include Dodge City and Russell, Kan., Kansas City and St. Joseph, Mo., Des Moines and Cedar Rapids, Iowa, La Crosse and Madison, Wis.
The greatest threats from the storms throughout the region are damaging wind gusts, large hail, and frequent lightning strikes.
Where the storms repeat, generally from northwestern Missouri to southwestern Wisconsin, there is an elevated risk of flooding.
A couple of the strongest storms can also produce a tornado. The greatest chance of this in on the southwestern flank of the severe weather potential area from western Oklahoma to parts of Kansas. These storms will also tend to be more widely separated.
The storms are firing along a developing push of colder air that will sweep southward to Texas this week but will only crawl eastward.
As a result, portions of central and northern Kansas to northwestern Missouri, southeastern Nebraska, Iowa and southern Wisconsin will be under the risk from severe storms through Tuesday.
The bulk of the rain through Tuesday will fall north of the Illinois River and south of the Red River of the North, two rivers which have been hit by flooding recently.
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The coldest air of the season so far has descended on Harrisburg and south central Pennsylvania. A new storm will move in Saturday and tap into some of that cold air.
The coldest air of the season so far has moved in around Baltimore. A new storm will move in Saturday with a wintry mix.
A snowstorm and travel delays late Friday night into Saturday will mark the end of the worst of the frigid air hitting the Pittsburgh area.
The coldest air of the season so far has moved in around Washington, D.C. A new storm will move in this weekend with a wintry mix.
A new storm with snow will move in over Philadelphia Saturday, capturing the Arctic air that moved in recently. Slippery travel is forecast for a time.
First of three large snowstorms that winter. Over a foot of snow from mid-Atlantic states into New England: Nantucket Island 15.7" Philadelphia, PA 14.6" Baltimore, MD 14.1" Avoca, PA 11.1" Newark, NJ 20.4" Central Park, NY 19.6" Boston, MA 18"
Kent, WA (near Seattle) (1969)
Waterspout moved inland over Kent, south of Seattle; 5 mile path, damage to residences; 0 killed.
Dover, DE (1899)
24.0" snow; December record.