Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 147, NWS Des Moines, IA

May 26, 20244 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at May 26, 2024, 7:36 PM CDT for 4 counties in Iowa. It was in force for 24 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 26, 2024, 7:36 PM CDT (00:36 UTC)
Expired: May 26, 2024, 8:00 PM CDT
In force: 24 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Clarke County, IA, Decatur County, IA, Ringgold County, IA, Union County, IA

The radar

The Des Moines radar (KDMX), 97 km from the middle of the area, began a volume at 00:37 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

Topeka, KS (KTOP), launched 00:00Z, 0.6 hours before the alert went out and 251 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: 955 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1581 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.9

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 26, 6:37 PM CDT, 59 minutes earlier.

Area forecast discussion, May 26, 6:37 PM CDT, 59 minutes before

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Hazardous weather outlook, May 26, 2:47 PM CDT, 4 hours 49 minutes before

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In the hours before

Special weather statement, May 26, 4:53 PM CDT, 2 hours 43 minutes before

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Special weather statement, May 26, 6:19 PM CDT, 1 hour 17 minutes before

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Special weather statement, May 26, 6:29 PM CDT, 1 hour 7 minutes before

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Special weather statement, May 26, 6:49 PM CDT, 47 minutes before

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Special weather statement, May 26, 6:58 PM CDT, 38 minutes before

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Special weather statement, May 26, 7:30 PM CDT, 6 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 26, 7:03 PM CDT	Severe Thunderstorm Warning	DMX	Adams	27 min
May 26, 7:30 PM CDT	Special Weather Statement	DMX	Union	15 min
May 26, 7:40 PM CDT	Special Weather Statement	DMX	Ringgold	20 min
May 26, 7:56 PM CDT	Special Weather Statement	DMX	Decatur, Ringgold	19 min
May 26, 8:14 PM CDT	Special Weather Statement	DMX	Decatur, Ringgold	31 min
May 26, 8:40 PM CDT	Severe Thunderstorm Warning	DMX	Decatur	20 min
May 27, 3:02 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Tama	28 min

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.