Flood Watch

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of southwest and west central Iowa, including the following counties, in southwest Iowa, Harrison and Shelby. In west central Iowa, Monona.

* 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... - Slow moving thunderstorms may lead to rapid rainfall accumulations. Hourly rainfall rates of 2 to 4 inches are possible. This rainfall may lead to flash flooding along with rapid rises on streams and creeks. - http://www.weather.gov/safety/flood