* WHAT...Flash flooding caused by excessive rainfall from thunderstorms is possible.
* WHERE...Portions of central and south central Montana, including the following areas, in central Montana, Judith Gap and Southern Wheatland. In south central Montana, Crazy Mountains.
* WHEN...Through late tonight.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS... - Slow moving showers and thunderstorms capable of producing very heavy rainfall rates. - http://www.weather.gov/safety/flood