Alert archive / Iowa / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 108, NWS La Crosse, WI

July 29, 2025Fayette County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 29, 2025, 1:16 AM CDT for Fayette County, Iowa. It was in force for 44 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 29, 2025, 1:16 AM CDT (06:16 UTC)
Expired: Jul 29, 2025, 2:00 AM CDT
In force: 44 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Fayette County, IA

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 06:20 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
Jul 28, 10:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.3 hours before the alert went out and 177 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: 615 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 1409 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 51 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 La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 12:58 AM CDT, 18 minutes earlier.

Area forecast discussion, Jul 29, 12:58 AM CDT, 18 minutes before

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Hazardous weather outlook, Jul 28, 7:56 PM CDT, 5 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
756 PM CDT Mon Jul 28 2025

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-291000-
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-
756 PM CDT Mon Jul 28 2025

This Hazardous Weather Outlook is for portions of northeast
Iowa...southeast Minnesota...and southwest into central Wisconsin.

.DAY ONE...Tonight

Strong to severe storms are late this evening into the overnight
hours with the higher risk west of the Mississippi River. Damaging
winds will be the main hazard.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Due to timing of the event tonight, widespread spotter activation
is not anticipated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

nofwd

In the hours before

Local storm report, Jul 29, 12:28 AM CDT, 48 minutes before

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Local storm report, Jul 29, 12:42 AM CDT, 34 minutes before

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Local storm report, Jul 29, 1:01 AM CDT, 15 minutes before

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Local storm report, Jul 29, 1:02 AM CDT, 14 minutes before

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Local storm report, Jul 29, 1:03 AM CDT, 13 minutes before

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Local storm report, Jul 29, 1:10 AM CDT, 6 minutes before

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The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 10:48 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Buffalo, Trempealeau	61 min
Jul 28, 11:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Buffalo, Jackson, La Crosse, Trempealeau	44 min
Jul 28, 11:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Crawford, La Crosse, Vernon	73 min
Jul 28, 11:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Buffalo, Jackson, La Crosse, Trempealeau	31 min
Jul 29, 12:32 AM CDT	Severe Thunderstorm Warning	ARX	Monroe, Vernon	58 min
Jul 29, 2:53 AM CDT	Special Weather Statement	ARX	Grant	52 min
Jul 28, 11:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Howard, Mitchell, Winneshiek	45 min
Jul 29, 12:20 AM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Floyd, Howard, Mitchell	70 min
Jul 28, 10:39 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted, Wabasha	81 min
Jul 28, 11:08 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Mower, Olmsted, Wabasha, Winona	67 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2025 Every severe thunderstorm warning in 2025

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.