Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 51, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jul 27, 2021, 7:33 AM CDT for Jackson County, Monroe County, Wisconsin. It was in force for 57 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
- Jul 27, 2021, 7:33 AM CDT (12:33 UTC)
- Expired
- Jul 27, 2021, 8:30 AM CDT
- In force
- 57 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Jackson County, WI, Monroe County, WI
The radar
The La Crosse radar (KARX), 49 km from the middle of the area, began a volume at 12:33 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 |
|---|---|---|---|
| Jul 27, 7:50 AM CDT | TSTM WND GST 50 | 4 W Melrose, WI | PEA SIZE HAIL. |
| Jul 27, 7:55 AM CDT | TSTM WND DMG | Cataract, WI | 2 TREES DOWN ALONG STATE HIGHWAY 27. TIME ESTIMATED FROM RADAR. |
| Jul 27, 8:05 AM CDT | TSTM WND DMG | 5 S Cataract, WI | 1 TREE DOWN ON FEATHER AVENUE. TIME ESTIMATED FROM RADAR. |
| Jul 27, 8:06 AM CDT | TSTM WND GST 60 | Cataract, WI |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 0.6 hours before the alert went out and 219 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1421 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 378 m²/s²
- 0-3 km storm-relative helicity
- 563 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
456
WUUS53 KARX 271233
SVRARX
WIC053-081-271330-
/O.NEW.KARX.SV.W.0051.210727T1233Z-210727T1330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
733 AM CDT Tue Jul 27 2021
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Jackson County in west central Wisconsin...
Monroe County in west central Wisconsin...
* Until 830 AM CDT.
* At 732 AM CDT, severe thunderstorms were located along a line
extending from Shortville to 7 miles northeast of Blair, moving
southeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Cataract around 810 AM CDT.
Sparta and Fort Mc Coy around 820 AM CDT.
Other locations impacted by these severe thunderstorms include
Franklin, Shamrock, The Black River Correctional Center, Potters
Flowage, Perry Creek Recreation Area, Jellystone Park Near Warrens
and The Rezin Landing Strip.
This includes the following highways...
Interstate 94 between mile markers 101 and 147.
Interstate 90/94 between mile markers 46 and 52.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9112
4415 9116 4425 9115 4425 9117 4441 9117
4449 9080 4442 9080 4442 9045 4422 9031
TIME...MOT...LOC 1232Z 327DEG 35KT 4449 9056 4437 9113
HAIL...<.75IN
WIND...60MPH
$$
JSB7 follow-up statements
737
WWUS53 KARX 271240
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
740 AM CDT Tue Jul 27 2021
WIC053-081-271330-
/O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Jackson WI-Monroe WI-
740 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR JACKSON AND MONROE COUNTIES...
At 739 AM CDT, severe thunderstorms were located along a line
extending from 9 miles south of Shortville to 9 miles southeast of
Blair, moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Cataract around 800 AM CDT.
Sparta around 810 AM CDT.
Other locations impacted by these severe thunderstorms include
Franklin, Shamrock, The Black River Correctional Center, Potters
Flowage, Perry Creek Recreation Area, Jellystone Park Near Warrens
and The Rezin Landing Strip.
This includes the following highways...
Interstate 94 between mile markers 101 and 147.
Interstate 90/94 between mile markers 46 and 52.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9112
4415 9116 4425 9115 4425 9117 4441 9117
4449 9080 4442 9080 4442 9045 4422 9031
TIME...MOT...LOC 1239Z 329DEG 41KT 4436 9049 4424 9106
HAIL...<.75IN
WIND...60MPH
$$
JSB663
WWUS53 KARX 271247
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
747 AM CDT Tue Jul 27 2021
WIC053-081-271330-
/O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Jackson WI-Monroe WI-
747 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR JACKSON AND MONROE COUNTIES...
At 747 AM CDT, severe thunderstorms were located along a line
extending from 8 miles north of Millston to near Black River Falls to
8 miles northeast of North Bend, moving southeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
North Bend and Millston around 755 AM CDT.
Cataract around 805 AM CDT.
Fort Mc Coy around 810 AM CDT.
Sparta and Tomah around 815 AM CDT.
Other locations impacted by these severe thunderstorms include
Franklin, Warrens, Melrose, Shamrock, The Black River Correctional
Center, Portland and Pigeon Creek Campground.
This includes the following highways...
Interstate 94 between mile markers 110 and 147.
Interstate 90/94 between mile markers 46 and 52.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9112
4415 9116 4422 9115 4425 9115 4425 9116
4430 9117 4440 9076 4442 9045 4422 9031
TIME...MOT...LOC 1247Z 328DEG 37KT 4431 9061 4423 9082 4421 9103
HAIL...<.75IN
WIND...60MPH
$$
JSB662
WWUS53 KARX 271252
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
752 AM CDT Tue Jul 27 2021
WIC053-081-271330-
/O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Jackson WI-Monroe WI-
752 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR SOUTHERN JACKSON AND MONROE COUNTIES...
At 752 AM CDT, severe thunderstorms were located along a line
extending from 6 miles northeast of Millston to 7 miles north of
Cataract to 7 miles northeast of North Bend, moving southeast at 40
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Millston around 755 AM CDT.
Cataract around 805 AM CDT.
Fort Mc Coy around 810 AM CDT.
Sparta and Tomah around 815 AM CDT.
Other locations impacted by these severe thunderstorms include
Franklin, Warrens, Melrose, Shamrock, The Black River Correctional
Center, Portland and Pigeon Creek Campground.
This includes the following highways...
Interstate 94 between mile markers 116 and 147.
Interstate 90/94 between mile markers 46 and 52.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9112
4415 9116 4422 9115 4442 9045 4422 9031
TIME...MOT...LOC 1252Z 328DEG 37KT 4427 9058 4419 9078 4417 9100
HAIL...<.75IN
WIND...60MPH
$$
JSB252
WWUS53 KARX 271300
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
800 AM CDT Tue Jul 27 2021
WIC053-081-271330-
/O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Jackson WI-Monroe WI-
800 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR SOUTHERN JACKSON AND MONROE COUNTIES...
At 800 AM CDT, severe thunderstorms were located along a line
extending from 7 miles east of Millston to 6 miles north of Fort Mc
Coy to near Cataract, moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Sparta, Tomah and Fort Mc Coy around 810 AM CDT.
Other locations impacted by these severe thunderstorms include
Warrens, Melrose, Shamrock, Portland, Pigeon Creek Campground,
Potters Flowage and The North Flowage.
This includes the following highways...
Interstate 94 between mile markers 120 and 147.
Interstate 90/94 between mile markers 46 and 52.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9112
4415 9116 4438 9042 4422 9031
TIME...MOT...LOC 1300Z 328DEG 38KT 4417 9050 4410 9072 4405 9090
HAIL...<.75IN
WIND...60MPH
$$
JSB139
WWUS53 KARX 271310
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
810 AM CDT Tue Jul 27 2021
WIC053-081-271330-
/O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Jackson WI-Monroe WI-
810 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR SOUTHEASTERN JACKSON AND MONROE COUNTIES...
At 808 AM CDT, severe thunderstorms were located along a line
extending from 7 miles northeast of Tomah to Fort Mc Coy to Sparta,
moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trained weather spotters report 60 mph winds in Cataract at
804 am.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Tomah around 815 AM CDT.
Other locations impacted by these severe thunderstorms include
Warrens, Portland, The North Flowage, Oakdale, Valley Junction,
Highway 33 And County Y and Jellystone Park Near Warrens.
This includes the following highways...
Interstate 94 between mile markers 132 and 147.
Interstate 90/94 between mile markers 46 and 51.
Interstate 90 in Wisconsin between mile markers 21 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4388 9032 4375 9091 4407 9091 4407 9093
4408 9093 4424 9034
TIME...MOT...LOC 1308Z 328DEG 38KT 4409 9042 4401 9065 4396 9082
HAIL...<.75IN
WIND...60MPH
$$
JSB657 WWUS53 KARX 271320 SVSARX Severe Weather Statement National Weather Service La Crosse WI 820 AM CDT Tue Jul 27 2021 WIC053-271330- /O.CAN.KARX.SV.W.0051.000000T0000Z-210727T1330Z/ Jackson WI- 820 AM CDT Tue Jul 27 2021 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JACKSON COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. LAT...LON 4388 9032 4375 9091 4407 9091 4416 9034 TIME...MOT...LOC 1320Z 333DEG 36KT 4403 9041 4391 9066 4391 9087 $$ WIC081-271330- /O.CON.KARX.SV.W.0051.000000T0000Z-210727T1330Z/ Monroe WI- 820 AM CDT Tue Jul 27 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT FOR MONROE COUNTY... At 820 AM CDT, severe thunderstorms were located along a line extending from near Tomah to 7 miles south of Fort Mc Coy to near Sparta, moving southeast at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Trained weather spotters. IMPACT...Expect damage to roofs, siding, and trees. These severe thunderstorms will remain over mainly rural areas of Monroe County, including the following locations... Warrens, St Marys, Portland, County Roads I And I I, Jackson Pass, Clifton and Oakdale. This includes the following highways... Interstate 94 between mile markers 136 and 147. Interstate 90/94 between mile markers 46 and 51. Interstate 90 in Wisconsin between mile markers 21 and 45. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4388 9032 4375 9091 4407 9091 4416 9034 TIME...MOT...LOC 1320Z 333DEG 36KT 4403 9041 4391 9066 4391 9087 HAIL...<.75IN WIND...60MPH $$ JSB
867
WWUS53 KARX 271329
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
829 AM CDT Tue Jul 27 2021
WIC081-271338-
/O.EXP.KARX.SV.W.0051.000000T0000Z-210727T1330Z/
Monroe WI-
829 AM CDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR MONROE COUNTY WILL EXPIRE AT
830 AM CDT...
The storms which prompted the warning have weakened below severe
limits. Therefore, the warning will be allowed to expire. However
wind gusts to 40 mph are still possible with these thunderstorms.
LAT...LON 4388 9032 4375 9091 4407 9091 4416 9034
TIME...MOT...LOC 1328Z 327DEG 35KT 4403 9041 4391 9066 4391 9087
$$
JSBThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 10:24 PM CDT | Special Weather Statement | ARX | Taylor | 66 min |
| Jul 27, 1:49 AM CDT | Special Weather Statement | ARX | Taylor | 56 min |
| Jul 27, 2:45 AM CDT | Special Weather Statement | ARX | Taylor | 60 min |
| Jul 27, 6:34 AM CDT | Special Weather Statement | ARX | Clark | 56 min |
| Jul 27, 7:01 AM CDT | Special Weather Statement | ARX | Trempealeau | 59 min |
| Jul 27, 7:08 AM CDT | Special Weather Statement | ARX | Clark | 67 min |
| Jul 27, 8:17 AM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Vernon | 58 min |
| Jul 27, 8:36 AM CDT | Special Weather Statement | ARX | Juneau | 54 min |
| Jul 27, 9:16 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 28 min |
| Jul 27, 11:54 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Trempealeau | 51 min |
| Jul 27, 12:00 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, La Crosse, Trempealeau | 45 min |
| Jul 27, 3:10 PM CDT | Heat Advisory | ARX | Buffalo, Crawford, Grant, Jackson, La Crosse, Monroe and 3 more | 30 hr |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2021Every severe thunderstorm warning in 2021
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.