National Weather Service Des Moines IA
403 AM CDT Mon Sep 30 2019

…HEAVY RAIN AND FLASH FLOOD POTENTIAL…

A wet pattern is setting up across portions of Iowa through midweek. Repeated rounds of rainfall are expected which may lead to widespread heavy rainfall and the potential for flash flooding. Some areas of the state have already had heavy rainfall over the past several days to a week with soils already saturated in spots. These conditions combined with increased runoff from post-mature croplands will increase the threat of flash flooding as well.

Sac-Crawford-Carroll-Audubon-Guthrie-Dallas-Cass-Adair-Adams-Taylor Counties – FLASH FLOOD WATCH 10-P.M. (9/30) THRU 7-A.M. WEDNESDAY (10/2)
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-Page-Counties – FLASH FLOOD WATCH 7-P.M. (9/30) THRU 7-A.M. WEDNESDAY. (10/2)

* Widespread rainfall of 1 to 2 inches with areas of 2 to 4 inches expected. Locally heavier amounts in excess of 4 inches possible through early Wednesday. Rain rates may exceed 1 to 2inches per hour at times late tonight through Tuesday night.

* Low water crossings may become impeded, especially on secondary roads. Smaller streams may have rapid rises. Water may pond on roads and in fields. Urban areas may see ponding of water.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.