3:51 p.m. - Thunderstorm warning issued for Atchison County, Mo.

NEBRASKA CITY - A thunderstorm watch has been issued for River Country today.

The watch includes Fremont, Montgomery, Mills and Page counties in Iowa. Atchison County, Mo., is in a watch until 9 p.m. today.

Flood warnings were issued Thursday for 20 Nebraska counties due to excessive rainfall on Wednesday night. Seven inches of rain is reported in Grand Island. Flooding of the South Loup river in Buffalo County was expected as the river crests more than a foot above flood stage.

The Missouri River is forecast to crest just below flood stage on Monday at 17.7 feet.