Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 19, NWS La Crosse, WI

May 21, 2024Grant County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 21, 2024, 3:30 PM CDT for Grant County, Wisconsin. It was in force for 45 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: May 21, 2024, 3:30 PM CDT (20:30 UTC)
Expired: May 21, 2024, 4:15 PM CDT
In force: 45 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Grant County, WI

The radar

The La Crosse radar (KARX), 113 km from the middle of the area, began a volume at 20:35 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
May 21, 1:14 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.5 hours before the alert went out and 140 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: 1292 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1074 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

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 May 21, 2:35 PM CDT, 55 minutes earlier.

Area forecast discussion, May 21, 2:35 PM CDT, 55 minutes before

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Hazardous weather outlook, May 21, 2:59 PM CDT, 31 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
259 PM CDT Tue May 21 2024

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-230000-
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-
259 PM CDT Tue May 21 2024

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

.DAY ONE...This afternoon and Tonight

Additional storms are expected through this evening with peak
time for severe storms from 5 to 9 PM. Damaging wind gusts, some
75mph+, tornadoes, some strong, and locally heavy rain are the
primary severe weather threats this afternoon and evening. Large
hail will also be possible. Be alert to the potential for
significant severe weather through this evening. Be extra weather
aware and prepared to take action and move to a safe
location/sturdy building away from trees.

Due to the multiple rounds of thunderstorms, localized areas may
receive several inches of rain. As a result, the threat for river
rises and flooding will be on the increase. Those with interests
along area creeks, streams, and rivers should monitor conditions.
Be prepared to alter travel plans during heavy rains or severe
weather.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The next chance for thunderstorms will be Friday. It is too early
to discern the severe weather threat at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed through this evening.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar scheduled.

NOFWD

In the hours before

Local storm report, May 21, 9:42 AM CDT, 5 hours 48 minutes before

Preliminary Local Storm Report
National Weather Service La Crosse WI
942 AM CDT Tue May 21 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     Rain             3 SW Waltham            43.79N 92.91W
05/21/2024  M3.05 Inch       Mower              MN   Cocorahs

            Cocorahs station MN-MW-15 Waltham 2.9 SW.

&&

Special weather statement, May 21, 11:42 AM CDT, 3 hours 48 minutes before

Special Weather Statement
National Weather Service La Crosse WI
1142 AM CDT Tue May 21 2024

IAZ008>011-018-019-029-030-MNZ079-086>088-094-095-WIZ032-211730-
Floyd IA-Chickasaw IA-Fayette IA-Mitchell IA-Clayton IA-
Winneshiek IA-Howard IA-Allamakee IA-Wabasha MN-Fillmore MN-
Winona MN-Olmsted MN-Dodge MN-Mower MN-Buffalo WI-
1142 AM CDT Tue May 21 2024

...GUSTY WINDS BEHIND A LINE OF SHOWERS WILL IMPACT SOUTHEAST
MINNESOTA AND NORTHEAST IOWA THROUGH 1230 PM CDT...

At 1140 AM CDT, Doppler radar was tracking gusty showers along a line
extending from Rochester to Stacyville to near Independence. Movement
was northeast at 55 mph.

HAZARD...Wind gusts up to 40 to 45 mph.

SOURCE...Radar indicated and automated observations.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Rochester, Austin, Decorah, Charles City, Oelwein, Cresco, Osage, New
Hampton, Dodge Center, Wabasha, West Union, Preston, Elkader,
Mantorville, Alma, Kasson, Stewartville, Byron, St. Charles, and
Plainview.

This includes Interstate 90 in Minnesota between mile markers 176 and
237.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4419 9255 4437 9255 4437 9243 4441 9243
      4446 9228 4441 9208 4453 9205 4457 9194
      4385 9199 4285 9127 4264 9152 4264 9208
      4291 9208 4291 9254 4326 9301 4420 9304
TIME...MOT...LOC 1640Z 217DEG 46KT 4402 9248 4341 9280 4249 9185

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Skow

Special weather statement, May 21, 12:30 PM CDT, 3 hours before

Special Weather Statement
National Weather Service La Crosse WI
1230 PM CDT Tue May 21 2024

IAZ009>011-019-029-MNZ079-086>088-094>096-WIZ032-033-041-053-054-
211815-
Chickasaw IA-Fayette IA-Winneshiek IA-Howard IA-Allamakee IA-
Wabasha MN-Fillmore MN-Winona MN-Houston MN-Olmsted MN-Dodge MN-
Mower MN-Buffalo WI-Crawford WI-Vernon WI-Trempealeau WI-
La Crosse WI-
1230 PM CDT Tue May 21 2024

...STRONG WINDS BEHIND LINE OF SHOWERS WILL AFFECT AREAS ALONG AND
WEST OF THE MISSISSIPPI RIVER THROUGH 115 PM CDT...

At 1228 PM CDT, Doppler radar and surface observations indicated
gusty showers along a line extending from 8 miles northeast of
Buffalo City to near Eyota to 9 miles west of Harpers Ferry.
Movement was east at 40 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated and surface observations.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Rochester, Winona, Decorah, La Crescent, Waukon, Cresco, Arcadia,
Caledonia, Wabasha, Whitehall, Preston, Lansing, Alma, Buffalo,
Stewartville, Byron, Goodview, St. Charles, Plainview, and Chatfield.

This includes Interstate 90 in Minnesota between mile markers 193 and
276.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4434 9241 4442 9211 4441 9208 4442 9208
      4460 9138 4460 9126 4404 9142 4326 9093
      4297 9209 4383 9283
TIME...MOT...LOC 1728Z 259DEG 34KT 4430 9173 4394 9220 4319 9133

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 10:30 AM CDT	River Flood Watch	ARX	Jackson	24 hr
May 21, 10:30 AM CDT	River Flood Watch	ARX	Juneau	3 days
May 21, 12:30 PM CDT	Special Weather Statement	ARX	Buffalo, Trempealeau	45 min
May 21, 6:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Buffalo, Jackson, La Crosse, Monroe, Trempealeau	66 min
May 21, 6:16 PM CDT	Tornado Warning	ARX	Buffalo, Trempealeau	16 min
May 21, 6:35 PM CDT	Severe Thunderstorm Warning	ARX	Grant	25 min
May 21, 6:40 PM CDT	Tornado Warning	ARX	Jackson, Trempealeau	31 min
May 21, 6:41 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Crawford	52 min
May 21, 6:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	La Crosse, Monroe, Vernon	43 min
May 21, 6:55 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Clark, Jackson, Monroe, Vernon	65 min
May 21, 1:31 AM CDT	Flood Watch	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	19 hr
May 21, 3:17 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Chickasaw, Fayette, Winneshiek	43 min
May 21, 11:24 AM CDT	River Flood Watch	ARX	Clayton	18 hr
May 21, 11:24 AM CDT	River Flood Warning	ARX	Winneshiek	29 hr
May 21, 11:24 AM CDT	River Flood Warning	ARX	Clayton	53 hr
May 21, 11:42 AM CDT	Special Weather Statement	ARX	Chickasaw, Clayton, Fayette, Howard, Mitchell, Winneshiek	48 min
May 21, 5:03 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Floyd, Mitchell	57 min
May 21, 5:24 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Chickasaw, Howard	66 min
May 21, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Winneshiek	39 min
May 21, 6:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Fayette	46 min
May 21, 6:24 PM CDT	Flash Flood Warning	ARX	Fayette, Winneshiek	3 hr
May 21, 6:28 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Allamakee, Winneshiek	62 min
May 21, 6:49 PM CDT	Flash Flood Warning	ARX	Allamakee, Winneshiek	3 hr
May 21, 6:49 PM CDT	Tornado Warning	ARX	Allamakee, Clayton, Fayette, Winneshiek	15 min
May 20, 7:13 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Olmsted	62 min
May 20, 7:31 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower	44 min
May 20, 7:53 PM CDT	Areal Flood Advisory	ARX	Dodge, Olmsted	2 hr
May 20, 9:51 PM CDT	Areal Flood Advisory	ARX	Mower	2 hr
May 20, 10:10 PM CDT	Special Weather Statement	ARX	Mower	35 min
May 20, 10:17 PM CDT	Severe Thunderstorm Warning	ARX	Mower	41 min
May 21, 5:08 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ARX	Dodge	52 min
May 21, 6:05 PM CDT	Tornado Warning	ARX	Winona	25 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.