Full Notification

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

* WHERE...Portions of central, northeast, south central, and southeast Iowa, including the following counties, in central Iowa, Dallas, Grundy, Hardin, Jasper, Marshall, Polk, Poweshiek, Story and Tama. In northeast Iowa, Black Hawk. In south central Iowa, Appanoose, Clarke, Decatur, Lucas, Madison, Mahaska, Marion, Monroe, Ringgold, Union, Warren and Wayne. In southeast Iowa, Davis and Wapello.

* WHEN...From Saturday afternoon through Monday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded.

* ADDITIONAL DETAILS... - Several rounds of thunderstorms are expected this weekend. A band of heavy to very heavy rainfall may occur, especially Saturday night and again Sunday night. Some locations may have event totals exceeding 5 inches of rainfall.

* AFFECTED AREAS: HARDIN ... GRUNDY ... BLACK HAWK ... STORY ... MARSHALL ... TAMA ... DALLAS ... POLK ... JASPER ... POWESHIEK ... MADISON ... WARREN ... MARION ... MAHASKA ... UNION ... CLARKE ... LUCAS ... MONROE ... WAPELLO ... RINGGOLD ... DECATUR ... WAYNE ... APPANOOSE ... DAVIS

Instructions:

For the latest waterway observations and forecasts refer to weather.gov/desmoines/water.