Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 80, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at May 27, 2026, 7:46 PM CDT for Jackson County, Wisconsin. It was in force for 33 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 27, 2026, 7:46 PM CDT (00:46 UTC)
- Expired
- May 27, 2026, 8:19 PM CDT
- In force
- 33 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Jackson County, WI
The radar
The La Crosse radar (KARX), 45 km from the middle of the area, began a volume at 00:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 7:57 PM CDT | HAIL 0.75 | 1 Nnw Black River Falls, WI | 1/2 + hail for 5 minutes on the north side of I 94 in Black River Falls. |
| May 27, 8:00 PM CDT | HAIL 0.7 | 1 Wnw Black River Falls, WI | |
| May 27, 8:02 PM CDT | HAIL 0.7 | 1 Wsw Black River Falls, WI | |
| May 27, 8:02 PM CDT | HAIL 1 | Black River Falls, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 16 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.8 hours before the alert went out and 223 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
- 577 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 2222 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
181
WUUS53 KARX 280046
SVRARX
WIC053-280130-
/O.NEW.KARX.SV.W.0080.260528T0046Z-260528T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
746 PM CDT Wed May 27 2026
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Southwestern Jackson County in west central Wisconsin...
* Until 830 PM CDT.
* At 746 PM CDT, a severe thunderstorm was located near Alma Center,
or 7 miles northwest of Black River Falls, moving southeast at 25
mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* This severe thunderstorm will be near...
Black River Falls around 750 PM CDT.
Other locations impacted by this severe thunderstorm include Hixton,
Shamrock, Melrose, The Black River Falls Airport, Castle Mound,
Vaudreuil, and Perry Creek Recreation Area.
This includes Interstate 94 between mile markers 102 and 119.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 9091 4415 9092 4415 9095 4413 9098
4412 9097 4407 9097 4407 9107 4442 9110
4446 9086 4416 9073
TIME...MOT...LOC 0046Z 336DEG 20KT 4437 9096
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JSB4 follow-up statements
529
WWUS53 KARX 280057
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
757 PM CDT Wed May 27 2026
WIC053-280130-
/O.CON.KARX.SV.W.0080.000000T0000Z-260528T0130Z/
Jackson WI-
757 PM CDT Wed May 27 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN JACKSON COUNTY...
At 757 PM CDT, a severe thunderstorm was located over Black River
Falls, moving southeast at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of
southwestern Jackson County, including the following locations...
Shamrock, Melrose, The Majestic Pines Casino, The Black River Falls
Airport, Disco, Castle Mound, and Vaudreuil.
This includes Interstate 94 between mile markers 111 and 120.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 9091 4415 9092 4415 9095 4413 9098
4412 9097 4407 9097 4407 9107 4431 9109
4437 9082 4416 9073
TIME...MOT...LOC 0057Z 329DEG 22KT 4430 9087
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JSB650
WWUS53 KARX 280106
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
806 PM CDT Wed May 27 2026
WIC053-280130-
/O.CON.KARX.SV.W.0080.000000T0000Z-260528T0130Z/
Jackson WI-
806 PM CDT Wed May 27 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN JACKSON COUNTY...
At 806 PM CDT, a severe thunderstorm was located near Black River
Falls, moving southeast at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Black River Falls, Irving, Shamrock, The Black River Falls Airport,
Castle Mound, Vaudreuil, Lost Falls Campground, Fall Hall Glen, Perry
Creek Recreation Area, and Disco.
This includes Interstate 94 between mile markers 115 and 119.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 9091 4415 9092 4419 9095 4427 9100
4433 9081 4416 9073
TIME...MOT...LOC 0106Z 336DEG 20KT 4425 9084
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JSB289
WWUS53 KARX 280112
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
812 PM CDT Wed May 27 2026
WIC053-280130-
/O.CON.KARX.SV.W.0080.000000T0000Z-260528T0130Z/
Jackson WI-
812 PM CDT Wed May 27 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN JACKSON COUNTY...
At 810 PM CDT, a severe thunderstorm was located near Black River
Falls, moving southeast at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Law enforcement. At 802 pm, quarter size hail was reported
at the Jackson County Sheriff office.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Black River Falls, Irving, Shamrock, The Black River Falls Airport,
Castle Mound, Vaudreuil, Lost Falls Campground, Fall Hall Glen, Perry
Creek Recreation Area, and Disco.
This includes Interstate 94 between mile markers 115 and 119.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4416 9091 4415 9092 4419 9095 4427 9100
4433 9081 4416 9073
TIME...MOT...LOC 0110Z 336DEG 20KT 4423 9083
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JSB377
WWUS53 KARX 280119
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
819 PM CDT Wed May 27 2026
WIC053-280129-
/O.CAN.KARX.SV.W.0080.000000T0000Z-260528T0130Z/
Jackson WI-
819 PM CDT Wed May 27 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN JACKSON COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
&&
LAT...LON 4416 9091 4415 9092 4419 9095 4427 9100
4433 9081 4416 9073
TIME...MOT...LOC 0116Z 336DEG 20KT 4418 9080
$$
JSBWhat 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 27, 6:32 PM CDT, 1 hour 14 minutes earlier. Its key messages:
- Another shot (20-50%) for showers and thunderstorms this afternoon and evening. A strong thunderstorm or two may develop.
- Above normal temperatures continue through the weekend.
Area forecast discussion, May 27, 6:32 PM CDT, 1 hour 14 minutes before
Area Forecast Discussion National Weather Service La Crosse WI 632 PM CDT Wed May 27 2026 .KEY MESSAGES... - Another shot (20-50%) for showers and thunderstorms this afternoon and evening. A strong thunderstorm or two may develop. - Above normal temperatures continue through the weekend. && .DISCUSSION... Issued at 123 PM CDT Wed May 27 2026 Shower and thunderstorm potential this afternoon/evening 17z WV satellite shows northwesterly flow aloft over our forecast area with a weak disturbance in this flow over western Lake Superior. At the surface, a cold front is located over northern WI. This afternoon and evening, as the weak disturbance moves southeast and the backdoor cold front begins to push through the area, showers and thunderstorms may develop. With warm surface temperatures and dewpoints once again in the 60s, would seemingly expect a similar outcome to yesterday but with convection favoring our east, away from the upper ridge building over the eastern Dakotas. Compared to yesterday, mid levels are drier and am thus concerned that updraft attempts may struggle. Have therefore kept PoPs in the 20-50 range for now. In any case, deep boundary layer continues to indicate a risk for a stray severe gust and, with deep shear just a touch stronger than Tuesday at around 25 knots, could see a stray severe hail report once again. Above normal temperatures ahead Guidance continues to point toward persistent upper ridge over the central CONUS with cyclonic flow centered in eastern Canada. After a post-frontal day with temperatures near normal Thursday and Thursday night, temperatures return to the 80s for Friday through next Tuesday. As time goes on and the upper ridge slowly weakens, could get some afternoon/evening convection Sunday through Tuesday but confidence in details is very low at this time. && .AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Issued at 631 PM CDT Wed May 27 2026 A backdoor cold front will move south and southwest through the area this evening and overnight. There may be a few storms near KLSE between 28.02z and 28.04z, but confidence was not high enough to include them in KLSE TAF at this time. Both ceilings and visibilities should remain primarily VFR. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && DISCUSSION...Ferguson AVIATION...Boyne
Hazardous weather outlook, May 27, 1:27 PM CDT, 6 hours 19 minutes before
Hazardous Weather Outlook National Weather Service La Crosse WI 127 PM CDT Wed May 27 2026 MNZ088-096-WIZ017-029-032>034-041>044-053>055-282230- Winona-Houston-Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse- Monroe-Juneau-Adams-Vernon-Crawford-Richland- 127 PM CDT Wed May 27 2026 This Hazardous Weather Outlook is for portions of southeast Minnesota...central Wisconsin...north central Wisconsin... southwest Wisconsin and west central Wisconsin. .DAY ONE...This Afternoon and Tonight Storms are possible (20 to 50 percent) this afternoon and evening. If a stronger storm forms, then strong wind gusts or hail would be possible. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ008>011-018-019-029-030-MNZ079-086-087-094-095-WIZ061-282230- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Wabasha-Dodge-Olmsted-Mower-Fillmore-Grant- 127 PM CDT Wed May 27 2026 This Hazardous Weather Outlook is for portions of north central Iowa...northeast Iowa...southeast Minnesota and southwest Wisconsin. .DAY ONE...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. APF
In the hours before
Local storm report, May 27, 6:19 PM CDT, 1 hour 27 minutes before
Preliminary Local Storm Report
National Weather Service La Crosse WI
619 PM CDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0553 PM Hail 4 SE Loyal 44.70N 90.44W
05/27/2026 M1.00 Inch Clark WI Public
&&
JSBLocal storm report, May 27, 7:36 PM CDT, 10 minutes before
Preliminary Local Storm Report
National Weather Service La Crosse WI
736 PM CDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0651 PM Tstm Wnd Dmg 6 NE Grand Marsh 43.95N 89.63W
05/27/2026 Adams WI Law Enforcement
1 tree blown down.
&&
JSBLocal storm report, May 27, 7:37 PM CDT, 9 minutes before
Preliminary Local Storm Report
National Weather Service La Crosse WI
737 PM CDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0646 PM Tstm Wnd Dmg 9 E Big Flats 44.11N 89.62W
05/27/2026 Adams WI Law Enforcement
1 tree blown down.
&&
JSBLocal storm report, May 27, 7:43 PM CDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service La Crosse WI
743 PM CDT Wed May 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0656 PM Tstm Wnd Dmg 5 E Adams 43.97N 89.72W
05/27/2026 Adams WI Law Enforcement
1 tree blown down.
&&
JSBNearby
Severe Thunderstorm Warnings in Wisconsin, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.