FloodZoneMap.org

Flash Flood — Clarke, IA

Aug 13, 2006

A moderately unstable airmass was in place across Iowa ahead of an approaching cold front. The airmass was tropical in nature with a clear tropical connection evident on satellite pictures. Precipitable water values were in the 2 to 2.5 inch range by mid afternoon. Considerable debris cloudiness was over much of the state during the day from convection the previous night to the west. The clouds kept temperatures from warming much above the 85 to 90 F. degree range ahead of the cold front, th

Source: NOAA National Weather Service Storm Events Database (event 5528445). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Clarke, IA

This event is one of many recorded floods in Clarke County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Clarke County flood data →

More Flood Stories

Flood$200K damage

Clarke, IA · Mar 12, 2019

Early reports starting on the 9th are in this entry, with several later reports starting on the 13th in Part II. ||Additionally the combination of heavy snowpack and heavy rainfall absorbed into the snow partially collapsed a horse barn roof in rural Adair County near…

Read the full account →
Flood$250K damage

Clarke, IA · Jun 25, 2015

A slowly northward moving boundary/warm front was draped across the area throughout the day. By the evening vigorous storms fired up just north of the boundary and continued as the low level jet began to pick up. Numerous reports of large hail and damaging winds were reported.

Read the full account →
Flash Flood$250K damage

Clarke, IA · Aug 23, 2014

A very moist airmass was in place with warm cloud depths near 4.5 km. Precipitable water values were in the 2.2 to 2.4 inch range over a large part of Iowa. A thunderstorm complex formed over eastern Nebraska during the evening of the 22nd.

Read the full account →
Flash Flood$250K damage

Clarke, IA · Aug 23, 2014

A very moist airmass was in place with warm cloud depths near 4.5 km. Precipitable water values were in the 2.2 to 2.4 inch range over a large part of Iowa. A thunderstorm complex formed over eastern Nebraska during the evening of the 22nd.

Read the full account →