Alert archive / Iowa / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 163, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jul 20, 2026, 2:53 PM CDT for Floyd County, Iowa. It was in force for 52 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 20, 2026, 2:53 PM CDT (19:53 UTC)
- Expired
- Jul 20, 2026, 3:45 PM CDT
- In force
- 52 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Floyd County, IA
The radar
The La Crosse radar (KARX), 154 km from the middle of the area, began a volume at 19:56 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
Minneapolis, MN (KMPX), launched 12:00Z, 7.9 hours before the alert went out and 209 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.
- Mixed-layer CAPE
- 982 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 299 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 12:42 PM CDT, 2 hours 11 minutes earlier.
Area forecast discussion, Jul 20, 12:42 PM CDT, 2 hours 11 minutes before
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</html>Hazardous weather outlook, Jul 20, 4:30 AM CDT, 10 hours 23 minutes before
Hazardous Weather Outlook National Weather Service La Crosse WI 430 AM CDT Mon Jul 20 2026 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-211000- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston- Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau- Adams-Vernon-Crawford-Richland-Grant- 430 AM CDT Mon Jul 20 2026 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight Air Quality Alerts remain in effect through the morning hours for unhealthy air quality due to wildfire smoke. Strong to severe storms are possible through the afternoon into tonight with damaging winds, large hail, and a few tornadoes possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Severe reports are appreciated. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 4:49 AM CDT | Special Weather Statement | ARX | Buffalo, Trempealeau | 56 min |
| Jul 20, 3:01 PM CDT | Special Weather Statement | ARX | Vernon | 29 min |
| Jul 20, 3:37 PM CDT | Special Weather Statement | ARX | Crawford | 23 min |
| Jul 20, 4:18 PM CDT | Special Weather Statement | ARX | Grant | 27 min |
| Jul 20, 5:54 AM CDT | Special Weather Statement | ARX | Chickasaw, Floyd, Howard, Mitchell, Winneshiek | 66 min |
| Jul 20, 7:06 AM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 34 min |
| Jul 20, 7:42 AM CDT | Special Weather Statement | ARX | Chickasaw, Floyd, Howard, Mitchell | 63 min |
| Jul 20, 8:34 AM CDT | Special Weather Statement | ARX | Chickasaw, Winneshiek | 26 min |
| Jul 20, 10:34 AM CDT | Heat Advisory | ARX | Chickasaw, Floyd, Howard, Mitchell | 8 hr |
| Jul 20, 6:18 AM CDT | Special Weather Statement | ARX | Dodge, Mower | 57 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2026Every severe thunderstorm warning in 2026
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.