Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 73, NWS Des Moines, IA

May 19, 20249 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 19, 2024, 7:58 PM CDT for 9 counties in Iowa. It was in force for 47 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: May 19, 2024, 7:58 PM CDT (00:58 UTC)
Expired: May 19, 2024, 8:45 PM CDT
In force: 47 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Guthrie County, IA, Madison County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA

The radar

The Des Moines radar (KDMX), 88 km from the middle of the area, began a volume at 01:00 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
May 19, 6:25 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.0 hours before the alert went out and 263 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: 793 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 1995 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 339 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 May 19, 6:52 PM CDT, 1 hour 6 minutes earlier.

Area forecast discussion, May 19, 6:52 PM CDT, 1 hour 6 minutes before

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Hazardous weather outlook, May 19, 4:58 AM CDT, 15 hours before

Hazardous Weather Outlook
National Weather Service Des Moines IA
458 AM CDT Sun May 19 2024

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-201000-
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-
458 AM CDT Sun May 19 2024

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Thunderstorms will track from west to east through the area today
and into tonight. A few storms this afternoon and evening may be
strong to severe, especially over southern Iowa. Strong winds,
hail and locally heavy rainfall will be the primary concerns, but
a tornado can't be ruled out.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional storms are expected on Monday, with the potential for
more strong to severe storms in the afternoon and evening hours.
Main threats will again be strong winds, hail and locally heavy
rainfall, with the potential for a tornado or two as well.

The greatest severe risk through the period will fall on Tuesday
as a larger scale system passes through the area. All hazards
may be possible, including damaging winds, large hail, heavy
rainfall and tornadoes. More details on this system will be
provided in the coming days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed for any storms this afternoon
through Tuesday.

Dodson

In the hours before

Local storm report, May 19, 4:14 PM CDT, 3 hours 44 minutes before

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Local storm report, May 19, 4:23 PM CDT, 3 hours 35 minutes before

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Local storm report, May 19, 4:44 PM CDT, 3 hours 14 minutes before

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Local storm report, May 19, 7:14 PM CDT, 44 minutes before

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Special weather statement, May 19, 7:30 PM CDT, 28 minutes before

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Local storm report, May 19, 7:32 PM CDT, 26 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
May 19, 7:14 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	42 min
May 19, 7:30 PM CDT	Special Weather Statement	DMX	Cass	30 min
May 19, 8:42 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	48 min
May 19, 8:53 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	52 min
May 19, 10:40 PM CDT	Special Weather Statement	DMX	Adair, Adams, Cass, Guthrie	50 min
May 20, 12:14 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Union	27 min
May 20, 1:26 AM CDT	Special Weather Statement	DMX	Appanoose, Lucas, Mahaska, Marion, Monroe	64 min
May 20, 1:36 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Clarke, Lucas, Marion, Monroe, Warren and 1 more	54 min
May 20, 1:50 PM CDT	Flood Watch	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 37 more	29 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.