* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of northwest and west central Iowa, including the following counties, in northwest Iowa, Emmet, Palo Alto and Pocahontas. In west central Iowa, Calhoun, Crawford and Sac.
* WHEN...Through late tonight.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS... - Very heavy rain is possible today into tonight with some areas with 5 inches or more possible.