Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 248, NWS Des Moines, IA

July 28, 2024Boone County, Story County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jul 28, 2024, 8:14 PM CDT for Boone County, Story County, Iowa. It was in force for 46 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 28, 2024, 8:14 PM CDT (01:14 UTC)
Expired: Jul 28, 2024, 9:00 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Boone County, IA, Story County, IA

The radar

The Des Moines radar (KDMX), 34 km from the middle of the area, began a volume at 01:16 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.

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 28, 2:06 PM CDT, 6 hours 8 minutes earlier.

Area forecast discussion, Jul 28, 2:06 PM CDT, 6 hours 8 minutes before

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Hazardous weather outlook, Jul 28, 2:13 PM CDT, 6 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Des Moines IA
213 PM CDT Sun Jul 28 2024

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
083>086-095>097-291200-
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-Clarke-Lucas-
Monroe-Wapello-Wayne-Appanoose-Davis-
213 PM CDT Sun Jul 28 2024

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Thunderstorm chances are forecast through tonight. A few storms
may be strong to severe, mainly over the western half of Iowa
through this evening. Strong wind gusts will be the primary
threat, but large hail and a couple of tornadoes remain possible
as well.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Heat and humidity will build through the middle of the week,
leading to peak heat index values near or in excess of 100 degrees
at times. The heat wave peaks Wednesday.

Periodic chances for storms continue through the week, although
the threat of severe weather is uncertain at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible later today or tonight, mainly in
western Iowa.

IAZ081-082-092>094-291200-
Adams-Union-Taylor-Ringgold-Decatur-
213 PM CDT Sun Jul 28 2024

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

Thunderstorm chances are forecast through tonight. A few storms
may be strong to severe, with strong wind gusts being the primary
threat.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A Heat Advisory is in effect for the area Monday afternoon and
evening. Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Heat and humidity will build further on Tuesday and Wednesday,
leading to peak heat index values in excess of 100 degrees each
day.

Periodic chances for storms continue through the week, although
the threat of severe weather is uncertain at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible later today or tonight.

In the hours before

Local storm report, Jul 28, 6:02 PM CDT, 2 hours 12 minutes before

Preliminary Local Storm Report
National Weather Service Des Moines IA
602 PM CDT Sun Jul 28 2024

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

0555 PM     Hail             Polk City               41.77N 93.73W
07/28/2024  M0.25 Inch       Polk               IA   Trained Spotter

&&

MP

Special weather statement, Jul 28, 6:51 PM CDT, 1 hour 23 minutes before

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Local storm report, Jul 28, 7:36 PM CDT, 38 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
Jul 28, 7:35 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Webster	40 min
Jul 28, 8:40 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	50 min
Jul 28, 8:43 PM CDT	Tornado Warning	DMX	Jasper, Polk	19 min
Jul 28, 9:48 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Tama	42 min
Jul 28, 11:08 PM CDT	Flood Watch	DMX	Adair, Adams, Appanoose, Audubon, Cass, Clarke and 18 more	5 hr
Jul 29, 2:35 PM CDT	Heat Advisory	DMX	Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 26 more	25 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; radar from the NEXRAD Level II archive.