Alert archive / Iowa / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 194, NWS Des Moines, IA

October 13, 2023Audubon County, Carroll County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Oct 13, 2023, 2:59 AM CDT for Audubon County, Carroll County, Iowa. It was in force for 22 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: Oct 13, 2023, 2:59 AM CDT (07:59 UTC)
Expired: Oct 13, 2023, 3:21 AM CDT
In force: 22 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Audubon County, IA, Carroll County, IA

The radar

The Des Moines radar (KDMX), 97 km from the middle of the area, began a volume at 08:00 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 8.0 hours before the alert went out and 137 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 403 m²/s²
0-3 km storm-relative helicity: 316 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 Oct 13, 12:06 AM CDT, 2 hours 53 minutes earlier.

Area forecast discussion, Oct 13, 12:06 AM CDT, 2 hours 53 minutes before

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Hazardous weather outlook, Oct 12, 3:50 PM CDT, 11 hours 9 minutes before

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In the hours before

Special weather statement, Oct 12, 9:07 PM CDT, 5 hours 52 minutes before

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Special weather statement, Oct 13, 2:14 AM CDT, 45 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
Oct 13, 2:14 AM CDT	Special Weather Statement	DMX	Cass	31 min
Oct 13, 2:08 PM CDT	Special Weather Statement	DMX	Humboldt	37 min
Oct 13, 2:47 PM CDT	Special Weather Statement	DMX	Story	28 min
Oct 13, 3:00 PM CDT	Special Weather Statement	DMX	Story	30 min
Oct 13, 3:25 PM CDT	Tornado Warning	DMX	Boone, Story	15 min
Oct 13, 3:44 PM CDT	Tornado Warning	DMX	Jasper, Polk	19 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2023 Every severe thunderstorm warning in 2023

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.