FloodZoneMap.org

Flash Flood — Adams, IA

Jun 26, 2011

A dynamic pattern was once again in place over the central U.S. A strong surge of moisture took place during the day on the 26th, with precipitable water values rising to over 2 inches by evening. The airmass became very unstable with the lifted index falling to around -8 and CAPE in excess of 4000 J/kg. The atmosphere was quite warm with the freezing level between 15,000 and 16,000 feet. CAPE in the -10 to -30 C layer of the atmosphere was around 600 J/kg. Downdraft CAPE was quite high, in

Source: NOAA National Weather Service Storm Events Database (event 321933). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Adams, IA

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

View Adams County flood data →

More Flood Stories

Flood$250K damage

Adams, IA · Jul 29, 2015

A boundary was pushing through the state with ongoing convection through central Iowa through the day. As the boundary neared the area, the convection intensified and impacted central and southern Iowa in the evening to early morning hours.

Read the full account →
Flash Flood$10K damage

Adams, IA · Jun 25, 2019

During the evening of the 25th, a number of storms were able to initiate along a relatively stationary boundary situated across southern Iowa. On the warm side of the boundary surface conditions were in the mid 80s for temperature and upper 60s to low 70s dewpoints.

Read the full account →
Flash Flood$150K damage

Adams, IA · Jul 28, 2015

A boundary was pushing through the state with ongoing convection through central Iowa through the day. As the boundary neared the area, the convection intensified and impacted central and southern Iowa in the evening to early morning hours.

Read the full account →
Flash Flood$150K damage

Adams, IA · Jun 7, 2014

An upper level low pressure moved northeast into the central U.S. during the day on the the 7th. The atmosphere had deep moisture present with precipitable water values in the 1.5 to 1.75 inch range across southern Iowa.

Read the full account →