Extreme Winter Storm to Impact Much of the Country

     Strong disturbances associated with two jet streams will develop into a major winter storm for much of the country on Monday through the week. The jet stream is bringing very cold arctic air down from Canada and kicking off the storm by bringing moderate snowfall amounts to much of the Northern Plains and Great Lakes regions. To the south, a wintery mix will begin Monday night in the Oklahoma Panhandle and Southern Kansas before spreading eastward into Missouri. Snow will then begin falling over parts of Central Oklahoma Monday night into Tuesday. 

     A PDS (Particularly Dangerous Situation) Winter Storm Warning is in effect for Central and Northeastern Oklahoma.

     A Blizzard Watch is in effect for much of Northern and Central Illinois and Northwest Indiana, where strong winds and extremely heavy snowfall rates will combine to produce blizzard conditions. As much as 20 inches of snow at a rate of 3 inches per hour are possible in these areas.

GFS showing snow depth by Tuesday afternoon

NAM showing more extreme snowfall totals up to 20+ inches from Central Oklahoma through Missouri, Illinois and Michigan