Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 155, NWS Des Moines, IA

June 4, 20244 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 4, 2024, 7:06 PM CDT for 4 counties in Iowa. It was in force for 39 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: Jun 4, 2024, 7:06 PM CDT (00:06 UTC)
Expired: Jun 4, 2024, 7:45 PM CDT
In force: 39 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Boone County, IA, Dallas County, IA, Polk County, IA, Story County, IA

The radar

The Des Moines radar (KDMX), 15 km from the middle of the area, began a volume at 00:09 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 271 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: 520 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: -42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 4, 6:31 PM CDT, 35 minutes earlier.

Area forecast discussion, Jun 4, 6:31 PM CDT, 35 minutes before

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Hazardous weather outlook, Jun 4, 3:02 PM CDT, 4 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service Des Moines IA
302 PM CDT Tue Jun 4 2024

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-052015-
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-
302 PM CDT Tue Jun 4 2024

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Scattered strong to severe storms are possible later this
afternoon into this evening as a front moves through the state.
The main threats are damaging wind gusts and large hail. Secondary
threats include locally heavy rainfall and a brief isolated
tornado.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at time.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed later this afternoon into this evening.

Castillo/Donavon

In the hours before

Local storm report, Jun 4, 2:23 PM CDT, 4 hours 43 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
223 PM CDT Tue Jun 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0210 PM     Funnel Cloud     7 S Tama                41.86N 92.59W
06/04/2024                   Tama               IA   Emergency Mngr

            Several calls to law enforcement reporting
            funnel cloud near highway 163 at the
            Poweshiek and Tama county line.

&&

Special weather statement, Jun 4, 4:00 PM CDT, 3 hours 6 minutes before

Special Weather Statement
National Weather Service Des Moines IA
400 PM CDT Tue Jun 4 2024

IAZ004-005-015-023-024-035-042130-
Humboldt IA-Palo Alto IA-Kossuth IA-Webster IA-Pocahontas IA-
Emmet IA-
400 PM CDT Tue Jun 4 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN WEBSTER...EASTERN
EMMET...EASTERN POCAHONTAS...KOSSUTH...HUMBOLDT AND EASTERN PALO ALTO
COUNTIES THROUGH 430 PM CDT...

At 359 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles east of Iowa Lake to 5 miles west of
Algona to 5 miles west of Humboldt to 6 miles west of Fort Dodge.
Movement was northeast at 25 mph.

HAZARD...Wind gusts up to 50 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.

Locations impacted include...
Fort Dodge, Algona, Dakota City, Humboldt, Fort Dodge Regional
Airport, Iowa Lake, Union Slogh, Armstrong, West Bend, Bancroft,
Badger, Swea City, Burt, Whittemore, Gilmore City, Titonka, Ringsted,
Livermore, Bode, and Fenton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4350 9402 4255 9399 4247 9442 4247 9444
      4256 9444 4256 9447 4350 9456
TIME...MOT...LOC 2059Z 235DEG 23KT 4351 9434 4307 9433 4272 9432 4250
9430

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Dodson

Local storm report, Jun 4, 4:26 PM CDT, 2 hours 40 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
426 PM CDT Tue Jun 4 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0425 PM     Tstm Wnd Gst     2 W Algona              43.08N 94.27W
06/04/2024  M63 MPH          Kossuth            IA   AWOS

&&

Special weather statement, Jun 4, 5:14 PM CDT, 1 hour 52 minutes before

Special Weather Statement
National Weather Service Des Moines IA
514 PM CDT Tue Jun 4 2024

IAZ005-006-016-024-025-035-042245-
Humboldt IA-Wright IA-Kossuth IA-Winnebago IA-Webster IA-Hancock IA-
514 PM CDT Tue Jun 4 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN WEBSTER...WESTERN
WRIGHT...KOSSUTH...HUMBOLDT...WESTERN HANCOCK AND WESTERN WINNEBAGO
COUNTIES THROUGH 545 PM CDT...

At 514 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 4 miles northeast of Union Slogh to 11 miles
southeast of Algona to near Fort Dodge. Movement was northeast 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.

Locations impacted include...
Fort Dodge, Algona, Dakota City, Humboldt, Eagle Grove, Britt, Fort
Dodge Regional Airport, Union Slogh, Buffalo Center, Bancroft,
Kanawha, Goldfield, Badger, Swea City, Burt, Thompson, Titonka,
Wesley, Livermore, and Corwith.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4350 9378 4320 9374 4258 9390 4246 9438
      4286 9435 4350 9442
TIME...MOT...LOC 2214Z 241DEG 22KT 4329 9406 4293 9412 4249 9422

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

Dodson

Special weather statement, Jun 4, 5:31 PM CDT, 1 hour 35 minutes before

Special Weather Statement
National Weather Service Des Moines IA
531 PM CDT Tue Jun 4 2024

IAZ035-036-046-047-042300-
Hamilton IA-Boone IA-Webster IA-Greene IA-
531 PM CDT Tue Jun 4 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN GREENE...
SOUTHEASTERN WEBSTER...SOUTHWESTERN HAMILTON AND NORTHERN BOONE
COUNTIES THROUGH 600 PM CDT...

At 531 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms 7 miles north of Ogden, or 10 miles northwest of Boone,
moving northeast at 20 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail and additional
         heavy rainfall of one to two inches.

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...
Boone, Gowrie, Dayton, Stratford, Lehigh, Harcourt, Paton, Boxholm,
Pilot Mound, Fraser, Dana, and Brushy Creek St Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4205 9427 4225 9437 4242 9394 4208 9379
TIME...MOT...LOC 2231Z 241DEG 15KT 4214 9404

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Dodson

Local storm report, Jun 4, 5:44 PM CDT, 1 hour 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 7:24 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	51 min
Jun 4, 8:09 PM CDT	Areal Flood Warning	DMX	Kossuth	12 hr
Jun 4, 8:14 PM CDT	Special Weather Statement	DMX	Jasper, Polk	31 min
Jun 4, 8:42 PM CDT	River Flood Warning	DMX	Humboldt	23 hr
Jun 4, 8:43 PM CDT	River Flood Warning	DMX	Humboldt, Kossuth	23 hr
Jun 5, 3:26 AM CDT	Wind Advisory	DMX	Cerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Winnebago and 1 more	16 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every severe thunderstorm warning in 2024

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.