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WWUS73 KDMX 200907

NPWDMX



URGENT - WEATHER MESSAGE

National Weather Service Des Moines IA

407 AM CDT Mon Apr 20 2026



IAZ035>039-047>050-061-062-075-086-201400-

/O.CON.KDMX.FZ.W.0001.000000T0000Z-260420T1400Z/

Webster-Hamilton-Hardin-Grundy-Black Hawk-Boone-Story-Marshall-

Tama-Jasper-Poweshiek-Mahaska-Wapello-

Including the cities of Grinnell, Reinbeck, Marshalltown, Toledo,

Wellsburg, Ottumwa, Boone, Fort Dodge, Dike, Newton, Gladbrook,

Grundy Center, Cedar Falls, Ames, Webster City, Conrad, Eldora,

Ackley, Traer, Waterloo, Iowa Falls, Dysart, Oskaloosa, and Tama

407 AM CDT Mon Apr 20 2026



...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...



* WHAT...Sub-freezing temperatures as low as 26.



* WHERE...Portions of central and eastern Iowa.



* WHEN...Until 9 AM CDT this morning.



* IMPACTS...Frost and freeze conditions could kill crops, other 

  sensitive vegetation and possibly damage unprotected outdoor 

  plumbing.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Take steps now to protect tender plants from the cold.



&&



$$



IAZ060-073-074-084-085-095>097-201400-

/O.CON.KDMX.FR.Y.0001.000000T0000Z-260420T1400Z/

Polk-Warren-Marion-Lucas-Monroe-Wayne-Appanoose-Davis-

Including the cities of Knoxville, Albia, Carlisle, Pella,

Seymour, Indianola, Corydon, Humeston, Centerville, Allerton,

Chariton, Bloomfield, Norwalk, and Des Moines

407 AM CDT Mon Apr 20 2026



...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...



* WHAT...Temperatures as low as 30 will result in frost formation.



* WHERE...Polk, Appanoose, Lucas, Marion, Monroe, Warren, Wayne, and 

  Davis Counties.



* WHEN...Until 9 AM CDT this morning.



* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 

  outdoor plants may be killed if left uncovered.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Take steps now to protect tender plants from the cold.



&&



$$



Jimenez