Alert archive / Wisconsin / Tornado Warnings in 2020
Tornado Warning 7, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Jul 21, 2020, 5:46 PM CDT for Vernon County, Wisconsin; Houston County, Minnesota. It was in force for 30 min. 5 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 21, 2020, 5:46 PM CDT (22:46 UTC)
- Expired
- Jul 21, 2020, 6:16 PM CDT
- In force
- 30 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Houston County, MN, Vernon County, WI
The radar
The La Crosse radar (KARX), 16 km from the middle of the area, began a volume at 22:45 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 |
|---|---|---|---|
| Jul 21, 5:51 PM CDT | TSTM WND DMG | 2 W Brownsville, MN | REPORT OF A BARN WITH A TIN ROOF TAKEN OFF. PASSED ALONG THAT OTHER BARNS IN THE AREA WERE POSSIBLY DAMAGED. |
| Jul 21, 5:56 PM CDT | FUNNEL CLOUD | 1 W Brownsville, MN | |
| Jul 21, 5:59 PM CDT | TSTM WND GST 50 | Stoddard, WI | 40 TO 50 MPH WIND - SOME HAIL. |
| Jul 21, 6:00 PM CDT | FUNNEL CLOUD | Stoddard, WI | DELAYED REPORT. VIA VIDEO SHARED ON WXOWS SOCIAL MEDIA SHOWED A FUNNEL CLOUD FROM THE STODDARD AREA. |
| Jul 21, 6:02 PM CDT | FUNNEL CLOUD | 2 Nw Stoddard, WI | FUNNEL CLOUD OVER THE MISSISSIPPI RIVER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 226 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
- 148 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1094 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted.
893
WFUS53 KARX 212246
TORARX
MNC055-WIC123-212330-
/O.NEW.KARX.TO.W.0007.200721T2246Z-200721T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
546 PM CDT Tue Jul 21 2020
The National Weather Service in La Crosse has issued a
* Tornado Warning for...
East central Houston County in southeastern Minnesota...
Northwestern Vernon County in southwestern Wisconsin...
* Until 630 PM CDT.
* At 546 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Brownsville, or 7 miles southwest of La Crosse,
moving southeast at 15 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Brownsville around 555 PM CDT.
Stoddard around 615 PM CDT.
Other locations impacted by this tornadic thunderstorm include County
Roads K And O.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4370 9133 4374 9133 4371 9116 4360 9116
TIME...MOT...LOC 2246Z 298DEG 12KT 4372 9132
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Rieck3 follow-up statements
569
WWUS53 KARX 212300
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
600 PM CDT Tue Jul 21 2020
MNC055-WIC123-212330-
/O.CON.KARX.TO.W.0007.000000T0000Z-200721T2330Z/
Houston MN-Vernon WI-
600 PM CDT Tue Jul 21 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EAST
CENTRAL HOUSTON AND NORTHWESTERN VERNON COUNTIES...
At 559 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Stoddard, or 9 miles south of La Crosse, moving
southeast at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Stoddard around 605 PM CDT.
Other locations impacted by this tornadic thunderstorm include County
Roads K And O.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4370 9133 4374 9133 4371 9116 4360 9116
TIME...MOT...LOC 2259Z 303DEG 18KT 4368 9125
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Rieck038
WWUS53 KARX 212308
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
608 PM CDT Tue Jul 21 2020
MNC055-212317-
/O.CAN.KARX.TO.W.0007.000000T0000Z-200721T2330Z/
Houston MN-
608 PM CDT Tue Jul 21 2020
...THE TORNADO WARNING FOR EAST CENTRAL HOUSTON COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4367 9127 4371 9127 4373 9126 4371 9116
4360 9116
TIME...MOT...LOC 2307Z 303DEG 18KT 4366 9121
$$
WIC123-212330-
/O.CON.KARX.TO.W.0007.000000T0000Z-200721T2330Z/
Vernon WI-
608 PM CDT Tue Jul 21 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR
NORTHWESTERN VERNON COUNTY...
At 607 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Stoddard, or 10 miles south of La Crosse, moving
southeast at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northwestern Vernon County, including the following locations...
County Roads K And O.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4367 9127 4371 9127 4373 9126 4371 9116
4360 9116
TIME...MOT...LOC 2307Z 303DEG 18KT 4366 9121
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Rieck882
WWUS53 KARX 212316
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
616 PM CDT Tue Jul 21 2020
WIC123-212326-
/O.CAN.KARX.TO.W.0007.000000T0000Z-200721T2330Z/
Vernon WI-
616 PM CDT Tue Jul 21 2020
...THE TORNADO WARNING FOR NORTHWESTERN VERNON COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However small hail and
gusty winds are still possible with this thunderstorm.
LAT...LON 4367 9127 4371 9127 4373 9126 4371 9116
4360 9116
TIME...MOT...LOC 2313Z 298DEG 12KT 4363 9116
$$
RieckNearby
Tornado Warnings in Wisconsin, 2020Tornado Warnings in Minnesota, 2020Every tornado warning in 2020Tornadoes in 2020
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.