Alert archive / Iowa / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 165, NWS Des Moines, IA

July 19, 2025Poweshiek County, Tama County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 19, 2025, 6:55 AM CDT for Poweshiek County, Tama County, Iowa. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 19, 2025, 6:55 AM CDT (11:55 UTC)
Expired: Jul 19, 2025, 7:30 AM CDT
In force: 35 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Poweshiek County, IA, Tama County, IA

The radar

The Des Moines radar (KDMX), 100 km from the middle of the area, began a volume at 11:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 19, 5:05 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 11.9 hours before the alert went out and 325 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1696 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 878 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 13.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 6:53 AM CDT, 2 minutes earlier.

Area forecast discussion, Jul 19, 6:53 AM CDT, 2 minutes before

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Hazardous weather outlook, Jul 19, 2:20 AM CDT, 4 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
220 AM CDT Sat Jul 19 2025

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-200730-
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-
220 AM CDT Sat Jul 19 2025

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE... Today and Tonight

There is a Slight Risk (level 2 of 5) severe weather central and
east this afternoon and tonight, followed by a Marginal Risk
elsewhere. Damaging winds are the primary threat. Large hail as
well as a tornado or two will be possible as well. Heavy rainfall
will also be possible through the overnight with a Slight Risk of
excessive rainfall for much of the area.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

There is a Marginal Risk (level 1 of 5) for severe weather and
excessive rainfall on Sunday and Monday with damaging winds being
the primary severe threat. Chances for thunderstorms will persist
into early next week. The threat for severe weather will continue
to be evaluated. Heavy rain will continue to remain possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this weekend.

In the hours before

Special weather statement, Jul 19, 2:04 AM CDT, 4 hours 51 minutes before

Special Weather Statement
National Weather Service Des Moines IA
204 AM CDT Sat Jul 19 2025

IAZ005-006-190730-
Kossuth IA-Winnebago IA-
204 AM CDT Sat Jul 19 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN KOSSUTH AND
NORTHWESTERN WINNEBAGO COUNTIES THROUGH 230 AM CDT...

At 204 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms over Frost, or 26 miles northwest of Forest City,
moving southeast at 30 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Thompson, Rake, and Scarville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4350 9357 4331 9373 4350 9410
TIME...MOT...LOC 0704Z 297DEG 27KT 4358 9393

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Dodson

Special weather statement, Jul 19, 2:28 AM CDT, 4 hours 27 minutes before

Special Weather Statement
National Weather Service Des Moines IA
228 AM CDT Sat Jul 19 2025

IAZ006-190800-
Winnebago IA-
228 AM CDT Sat Jul 19 2025

...STRONG THUNDERSTORMS WILL IMPACT WINNEBAGO COUNTY THROUGH 300 AM
CDT...

At 228 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from 4 miles northwest of
Mansfield to 8 miles southeast of Bricelyn to 12 miles east of Union
Slogh. Movement was southeast at 25 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible. Ponding of water on roadways, low visibilities,
         and rises in small streams and creeks.

Locations impacted include...
Forest City, Lake Mills, Rice Lake, Buffalo Center, Thompson, Leland,
Rake, Scarville, Lake Mills Municipal Airport, Hogsback Wildlife
Area, and Rice Lake State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4336 9350 4326 9358 4326 9375 4336 9397
      4350 9397 4350 9350
TIME...MOT...LOC 0728Z 301DEG 22KT 4361 9368 4346 9372 4331 9389

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Dodson

Special weather statement, Jul 19, 3:12 AM CDT, 3 hours 43 minutes before

Special Weather Statement
National Weather Service Des Moines IA
312 AM CDT Sat Jul 19 2025

IAZ006-007-016-017-190845-
Cerro Gordo IA-Winnebago IA-Worth IA-Hancock IA-
312 AM CDT Sat Jul 19 2025

...STRONG THUNDERSTORMS WILL IMPACT WORTH...NORTHEASTERN HANCOCK...
NORTHERN CERRO GORDO AND SOUTHEASTERN WINNEBAGO COUNTIES THROUGH 345
AM CDT...

At 312 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 5 miles northwest of Northwood to 4 miles west
of Manly to 6 miles northwest of Clear Lake. Movement was east at 35
mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Mason City, Forest City, Northwood, Manly, Clear Lake, Mason City
Municipal Airport, Rice Lake, Ventura, Plymouth, Fertile, Kensett,
Grafton, Hanlontown, Joice, Rock Falls, Miller, Burchinal, Portland,
Bolan, and McIntosh Woods State Park.

This includes Interstate 35 between mile markers 189 and 218.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4319 9303 4301 9323 4320 9365 4336 9351
      4350 9348 4350 9302
TIME...MOT...LOC 0812Z 289DEG 29KT 4349 9330 4331 9329 4317 9353

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Dodson

Special weather statement, Jul 19, 3:57 AM CDT, 2 hours 58 minutes before

Special Weather Statement
National Weather Service Des Moines IA
357 AM CDT Sat Jul 19 2025

IAZ016-024-025-190930-
Humboldt IA-Wright IA-Hancock IA-
357 AM CDT Sat Jul 19 2025

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN WRIGHT...NORTHEASTERN
HUMBOLDT AND SOUTHERN HANCOCK COUNTIES THROUGH 430 AM CDT...

At 356 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 5 miles south of Britt to 12 miles northwest of
Elm Lake to 9 miles northeast of Dakota City. Movement was southeast
at 30 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Belmond, Elm Lake, Kanawha, Goldfield, Renwick, Goodell, Hardy, Eagle
Grove Municipal Airport, and Belmond Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4298 9351 4279 9361 4270 9392 4286 9416
      4291 9403 4291 9397 4293 9397 4305 9385
TIME...MOT...LOC 0856Z 299DEG 24KT 4301 9379 4290 9385 4283 9409

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Dodson

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 2:04 AM CDT	Special Weather Statement	DMX	Winnebago	26 min
Jul 19, 2:28 AM CDT	Special Weather Statement	DMX	Winnebago	32 min
Jul 19, 2:51 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	24 min
Jul 19, 3:12 AM CDT	Special Weather Statement	DMX	Cerro Gordo, Worth	33 min
Jul 19, 3:27 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Worth	18 min
Jul 19, 3:57 AM CDT	Special Weather Statement	DMX	Wright	33 min
Jul 19, 4:09 AM CDT	Flash Flood Warning	DMX	Cerro Gordo	3 hr
Jul 19, 5:52 AM CDT	Tornado Warning	DMX	Boone, Story	23 min
Jul 19, 6:05 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Marshall, Polk, Poweshiek, Story and 2 more	40 min
Jul 19, 6:22 AM CDT	Tornado Warning	DMX	Polk	23 min
Jul 19, 6:44 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Lucas, Mahaska, Marion, Marshall, Monroe and 3 more	46 min
Jul 19, 2:48 PM CDT	Flood Watch	DMX	Adair, Appanoose, Audubon, Black Hawk, Boone, Calhoun and 27 more	18 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.