Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Des Moines IA
746 AM CDT Thu Aug 13 2026

IAZ023>028-033>039-044>050-057>062-070>075-081>086-097-141300-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Davis-
746 AM CDT Thu Aug 13 2026

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

A Flood Watch is in effect for the area through Friday afternoon.
Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Thunderstorms are likely this morning with additional scattered
showers and storms expected to linger or redevelop in portions of
at least central and northern Iowa into this afternoon. There is
then a chance for additional storms tonight into early Friday
morning. Severe storms and excessive rainfall are possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A Flood Watch is in effect for the area through Friday afternoon.
Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Additional chances for thunderstorms continue into Saturday.
Severe weather and excessive rainfall are possible at times
through at least Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times over the next few days.
Severe weather and rainfall reports are also appreciated.

$$

Flood Watch
National Weather Service Des Moines IA
253 AM CDT Thu Aug 13 2026

IAZ023>028-033>039-044>050-057>062-070>075-081>086-097-140400-
/O.NEW.KDMX.FA.A.0011.260813T1000Z-260814T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Davis-
Including the cities of Sac City, Rolfe, Laurens, Dike, Adel,
Greenfield, Eldora, Schaller, Carroll, Grinnell, Fonda,
Oskaloosa, Waterloo, Pocahontas, Ottumwa, Boone, Fort Dodge,
Waverly, Casey, Rockwell City, Conrad, Adair, Des Moines, Iowa
Falls, Lake City, Pella, Gladbrook, Belmond, Aplington,
Knoxville, Chariton, Greene, Carlisle, Webster City, Gilmore
City, Toledo, Marshalltown, Indianola, Clarion, Creston,
Parkersburg, Wall Lake, Norwalk, Bayard, Lake View, Atlantic,
Allison, Waukee, Grundy Center, Clarksville, Panora, Cedar Falls,
Eagle Grove, Dumont, Perry, Dysart, Denison, Newton, Ames,
Jefferson, Pomeroy, Audubon, Humboldt, Earlham, Shell Rock,
Odebolt, Reinbeck, Winterset, Stuart, Traer, Early, Fontanelle,
Tama, Hampton, Albia, Guthrie Center, Exira, Osceola, Manson,
Wellsburg, Bloomfield, Ackley, and Corning
253 AM CDT Thu Aug 13 2026

...FLOOD WATCH IN EFFECT THROUGH FRIDAY AFTERNOON...

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

* WHERE...Much of central Iowa.

* WHEN...Through Friday afternoon.

* 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...
  - Several rounds of rain have occurred this week with more rain
    to come from this morning through Friday morning. Storms this
    morning and again tonight into Friday morning have the
    potential to repeat over the same area leading to rain
    quickly accumulating as well as high rain rates of 1 to 2
    inches per hour.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

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

&&

$$

05

Hazard Report Provided By forecast.weather.gov