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8h ago

Freeze Warnings Sweep Midwest Overnight as Omaha Metro Joins Alerts

Clear skies with light winds will trigger radiational cooling that ends after sunrise.

Emporia, Kansas 11-13-2014 A frozen value allowed the brand new underground sprinkler system to spray water over the ornamental flower display planted around the fountain at the entance to Emporia State Univeristy campus. Credit: Mark Reinstein (Photo by Mark Reinstein/Corbis via Getty Images)
DES MOINES, IA - JANUARY 9: Extremely frigid temperatures cause steam to rise above the Des Moines River near a railroad bridge January 9, 2010 in downtown Des Moines, Iowa. The Midwest is bracing for another round of heavy snow and wind chills as low as 50 degrees below zero according to the National Weather Service. Frigid weather also grips the South, where a rare cold snap is expected to bring snow and ice to states from South Carolina to Louisiana. Temperatures are expected to rise in the coming week. (Photo by Steve Pope/Getty Images)
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Overview

  • NWS freeze warnings run late Wednesday into early Thursday in parts of Iowa, Illinois and Nebraska, with frost advisories extending into Missouri, Kansas and the Ohio Valley.
  • Temperatures are expected to fall into the upper 20s to low 30s in the warned areas, with some Iowa and northeast Nebraska counties forecast near 26 degrees.
  • The Omaha metro is under a pre-dawn freeze warning through about 9 a.m., with a quick warmup into the low to mid-60s expected by afternoon.
  • Forecasters expect most frost and freeze alerts to expire by mid-morning as sunshine returns, and they urge covering plants and safeguarding outdoor plumbing overnight.
  • WGN maps show roughly 14 states under frost or freeze alerts, reflecting a brief early-season cold snap that gives way to seasonable afternoons and a chance of more clouds and rain early next week.