Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 128, NWS La Crosse, WI

September 21, 2024Richland County, Vernon County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Sep 21, 2024, 2:01 PM CDT for Richland County, Vernon County, Wisconsin. It was in force for 29 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: Sep 21, 2024, 2:01 PM CDT (19:01 UTC)
Expired: Sep 21, 2024, 2:30 PM CDT
In force: 29 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Richland County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 59 km from the middle of the area, began a volume at 19:05 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, 7.0 hours before the alert went out and 281 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: 5 J/kg
Mixed-layer CIN: -598 J/kg
Mixed-layer LCL: 2079 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 295 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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 Sep 21, 1:07 PM CDT, 54 minutes earlier.

Area forecast discussion, Sep 21, 1:07 PM CDT, 54 minutes before

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Hazardous weather outlook, Sep 21, 4:48 AM CDT, 9 hours 13 minutes before

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In the hours before

Local storm report, Sep 21, 12:05 PM CDT, 1 hour 56 minutes before

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Special weather statement, Sep 21, 12:05 PM CDT, 1 hour 56 minutes before

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Special weather statement, Sep 21, 12:38 PM CDT, 1 hour 23 minutes before

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Special weather statement, Sep 21, 1:15 PM CDT, 46 minutes before

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Local storm report, Sep 21, 1:44 PM CDT, 17 minutes before

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Local storm report, Sep 21, 1:49 PM CDT, 12 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
Sep 21, 11:02 AM CDT	Special Weather Statement	ARX	Buffalo, Clark, Trempealeau	43 min
Sep 21, 11:15 AM CDT	Special Weather Statement	ARX	Crawford	45 min
Sep 21, 11:55 AM CDT	Special Weather Statement	ARX	Richland	50 min
Sep 21, 12:05 PM CDT	Special Weather Statement	ARX	Clark, Jackson, Trempealeau	40 min
Sep 21, 12:38 PM CDT	Special Weather Statement	ARX	La Crosse, Monroe	37 min
Sep 21, 12:45 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	31 min
Sep 21, 1:15 PM CDT	Special Weather Statement	ARX	Adams, Juneau, Monroe, Vernon	45 min
Sep 21, 3:32 PM CDT	Special Weather Statement	ARX	Taylor	28 min
Sep 21, 3:50 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	55 min
Sep 21, 4:16 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse	29 min
Sep 21, 4:40 PM CDT	Special Weather Statement	ARX	Taylor	35 min
Sep 21, 4:47 PM CDT	Severe Thunderstorm Warning	ARX	Crawford, Vernon	58 min
Sep 21, 4:51 PM CDT	Special Weather Statement	ARX	Jackson	24 min
Sep 21, 5:09 PM CDT	Severe Thunderstorm Warning	ARX	Jackson	24 min
Sep 21, 5:32 PM CDT	Severe Thunderstorm Warning	ARX	Crawford	28 min
Sep 21, 5:48 PM CDT	Severe Thunderstorm Warning	ARX	Grant	57 min
Sep 21, 10:34 AM CDT	Special Weather Statement	ARX	Allamakee	41 min
Sep 21, 5:18 PM CDT	Special Weather Statement	ARX	Chickasaw, Fayette, Floyd, Howard, Winneshiek	42 min
Sep 21, 6:31 PM CDT	Special Weather Statement	ARX	Winneshiek	59 min
Sep 21, 3:33 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Houston, Winona	57 min
Sep 21, 3:57 PM CDT	Severe Thunderstorm Warning	ARX	Houston	61 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.