Severe weather looks to return to the High Plains and Upper Midwest on Wednesday as an upper level low pressure system ejects out of the Rockies. Thunderstorms are expected to develop along a cold front that will stretch from eastern Nebraska/ western Iowa through northwestern Kansas. Some of these storms will produce strong gusty winds, large hail, dangerous lightning and tornadoes.

It appears that thunderstorm activity will be ongoing during the morning hours. These storms will be elevated in nature therefore large hail and strong winds will be the primary threats during the morning. But by afternoon the activity becomes more surfaced-based from the warm front southwestward along the cold front. These will be the storms that have the capability of becoming supercells producing very large hail, damaging winds and tornadoes.

A strengthening low level jet will run into this area by late afternoon and into the evening hours. This will dramatically increase lifting and low level shearing thus producing a few strong tornadoes (EF'3) within the region. It is highly advised that if you are living in the cities of Des Moines, Sioux City, Omaha, Lincoln or Sioux Falls that you continue to monitor things carefully throughout the day. Be prepared to seek shelter and have your storm plan ready to go.

SUMMARY..... morning thunderstorms will produce large hail and strong gusty winds.....evening activity will produce large hail, damaging winds and possible strong tornadoes.

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The Storm Prediction Center has already issued a MODERATE RISK for severe weather over parts of eastern Nebraska and western Iowa.

A SLIGHT RISK has been issued from the upper Mississippi Valley into the Central Plains.