Alert archive / Iowa / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 164, NWS Des Moines, IA

August 27, 20226 counties in Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Aug 27, 2022, 8:34 PM CDT for 6 counties in Iowa. It was in force for 41 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: Aug 27, 2022, 8:34 PM CDT (01:34 UTC)
Expired: Aug 27, 2022, 9:15 PM CDT
In force: 41 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Adair County, IA, Adams County, IA, Clarke County, IA, Madison County, IA, Ringgold County, IA, Union County, IA

The radar

The Des Moines radar (KDMX), 84 km from the middle of the area, began a volume at 01:33 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, 1.6 hours before the alert went out and 180 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: 1201 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.7

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 Aug 27, 6:25 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Aug 27, 6:25 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Aug 27, 2:58 PM CDT, 5 hours 36 minutes before

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In the hours before

Special weather statement, Aug 27, 4:43 PM CDT, 3 hours 51 minutes before

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Local storm report, Aug 27, 5:13 PM CDT, 3 hours 21 minutes before

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Special weather statement, Aug 27, 6:21 PM CDT, 2 hours 13 minutes before

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Local storm report, Aug 27, 6:32 PM CDT, 2 hours 2 minutes before

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Special weather statement, Aug 27, 6:45 PM CDT, 1 hour 49 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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Special weather statement, Aug 27, 7:10 PM CDT, 1 hour 24 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
Aug 27, 7:10 PM CDT	Special Weather Statement	DMX	Bremer	35 min
Aug 27, 8:09 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Ringgold, Taylor, Union	51 min
Aug 27, 9:06 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto, Pocahontas	39 min
Aug 27, 9:15 PM CDT	Special Weather Statement	DMX	Adair, Madison, Union	45 min
Aug 27, 11:46 PM CDT	Special Weather Statement	DMX	Polk, Warren	44 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2022 Every severe thunderstorm warning in 2022

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.