4 products issued by NWS for: Grinnell Regional Airport IA
TORNADO WATCH OUTLINE UPDATE FOR WT 277
NWS STORM PREDICTION CENTER NORMAN OK
110 PM CDT TUE MAY 21 2024

TORNADO WATCH 277 IS IN EFFECT UNTIL 900 PM CDT FOR THE
FOLLOWING LOCATIONS

IAC001-003-005-007-009-011-013-015-017-019-023-025-027-029-031-
033-037-039-043-045-047-049-051-053-055-057-061-063-065-067-069-
073-075-077-079-081-083-087-089-091-095-097-099-101-103-105-107-
109-111-113-115-117-121-123-125-127-131-135-139-147-151-153-157-
159-161-163-169-171-173-175-177-179-181-183-185-187-189-191-195-
197-220200-
/O.NEW.KWNS.TO.A.0277.240521T1810Z-240522T0200Z/

IA
. IOWA COUNTIES INCLUDED ARE

ADAIR ADAMS ALLAMAKEE
APPANOOSE AUDUBON BENTON
BLACK HAWK BOONE BREMER
BUCHANAN BUTLER CALHOUN
CARROLL CASS CEDAR
CERRO GORDO CHICKASAW CLARKE
CLAYTON CLINTON CRAWFORD
DALLAS DAVIS DECATUR
DELAWARE DES MOINES DUBUQUE
EMMET FAYETTE FLOYD
FRANKLIN GREENE GRUNDY
GUTHRIE HAMILTON HANCOCK
HARDIN HENRY HOWARD
HUMBOLDT IOWA JACKSON
JASPER JEFFERSON JOHNSON
JONES KEOKUK KOSSUTH
LEE LINN LOUISA
LUCAS MADISON MAHASKA
MARION MARSHALL MITCHELL
MONROE MUSCATINE PALO ALTO
POCAHONTAS POLK POWESHIEK
RINGGOLD SAC SCOTT
STORY TAMA TAYLOR
UNION VAN BUREN WAPELLO
WARREN WASHINGTON WAYNE
WEBSTER WINNEBAGO WINNESHIEK
WORTH WRIGHT

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Flood Statement
National Weather Service Des Moines IA
217 PM CDT Tue May 21 2024

IAC013-017-023-069-075-083-099-127-153-157-169-171-220415-
/O.CON.KDMX.FA.W.0003.000000T0000Z-240522T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Black Hawk IA-Bremer IA-Butler IA-Franklin IA-Grundy IA-Hardin IA-
Jasper IA-Marshall IA-Polk IA-Poweshiek IA-Story IA-Tama IA-
217 PM CDT Tue May 21 2024



* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Portions of central, north central, and northeast Iowa,
including the following counties, in central Iowa, Grundy, Hardin,
Jasper, Marshall, Polk, Poweshiek, Story and Tama. In north
central Iowa, Butler and Franklin. In northeast Iowa, Black Hawk
and Bremer.

* WHEN...Until 1115 PM CDT Tuesday.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring. Numerous roads
remain closed due to flooding. It will take several hours for all
the water from these storms to work through local drainage systems
in urban areas.

* ADDITIONAL DETAILS...
- At 215 PM CDT, Emergency management reported ongoing flooding
across the warned area. Between 5 and 6 inches of rain have
fallen.
- Additional rainfall from showers and thunderstorms this
afternoon may lead to renewed or additional flooding.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.



LAT...LON 4280 9208 4230 9207 4230 9230 4151 9230
4151 9326 4202 9349 4221 9350 4221 9346
4247 9346 4247 9350 4282 9350

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Hazardous Weather Outlook
National Weather Service Des Moines IA
215 PM CDT Tue May 21 2024

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-221915-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
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-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
215 PM CDT Tue May 21 2024

This Hazardous Weather Outlook is for portions of central Iowa,
north central Iowa, northeast Iowa, northwest Iowa, south central
Iowa, southeast Iowa, southwest Iowa, and west central Iowa.



A cold front that will be moving eastward across the state of Iowa
to generate a line of strong-severe storms during the afternoon
and evening hours with tornadoes, damaging winds, flash flooding,
and large hail all possible with the strongest storms. The worst
of the storms will be primarily during the 3 pm to 9 pm timeframe.
Winds could gust over 40 mph at times this evening as the storms
move off to the east.



Additional thunderstorm chances return at times Friday and
through the weekend. The severe weather potential for these days
will be better determined in the coming days.

.SPOTTER INFORMATION STATEMENT...

---

Flood Watch
National Weather Service Des Moines IA
1132 AM CDT Tue May 21 2024

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-220000-
/O.CON.KDMX.FA.A.0003.000000T0000Z-240522T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
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-
Including the cities of Grundy Center, Boone, Stuart, Conrad,
Denison, Aplington, Adair, Waverly, Pomeroy, Belmond,
Clarksville, Sac City, Odebolt, Wall Lake, Mason City, Forest
City, Northwood, Laurens, Perry, Winterset, Fort Dodge, Waukee,
Norwalk, Clarion, Gladbrook, Exira, Estherville, Lake Mills,
Wellsburg, Fontanelle, Bayard, Fonda, Eldora, Ames, Des Moines,
Rolfe, Iowa Falls, Toledo, Greenfield, Lake View, Indianola,
Schaller, Britt, Manly, Kanawha, Hampton, Reinbeck, Traer,
Gilmore City, Lake City, Panora, Allison, Clear Lake, Emmetsburg,
Dysart, Dike, Knoxville, Greene, Pocahontas, Shell Rock, Eagle
Grove, Guthrie Center, Newton, Cedar Falls, Humboldt, Pella,
Grinnell, Marshalltown, Earlham, Algona, Manson, Dumont, Casey,
Ackley, Oskaloosa, Carroll, Jefferson, Garner, Rockwell City,
Early, Tama, Atlantic, Parkersburg, Waterloo, Adel, Audubon,
Webster City, and Carlisle
1132 AM CDT Tue May 21 2024



* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Much of central Iowa.

* WHEN...Until 7 PM CDT this evening.

* 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...
- Rainfall of 3 to 5 inches with isolated higher amounts fell
over parts of central Iowa last night into this morning and
led to flash flooding in some areas. Additional round of
storms is expected this afternoon that may cause new flash
flooding or prolong or renew flash flooding in areas that
experienced flash flooding earlier.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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