Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 13, NWS Twin Cities, MN

July 28, 2021Chippewa County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 28, 2021, 9:08 PM CDT for Chippewa County, Wisconsin. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2021, 9:08 PM CDT (02:08 UTC)
Expired: Jul 28, 2021, 9:45 PM CDT
In force: 37 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Chippewa County, WI

The radar

The La Crosse radar (KARX), 133 km from the middle of the area, began a volume at 02:12 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
Jul 28, 7:17 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.1 hours before the alert went out and 194 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: 4815 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 374 m²/s²
0-3 km storm-relative helicity: 461 m²/s²
Significant tornado parameter: 8.9
Supercell composite: 48.1

Open this sounding in Storm Lab

The text

As transmitted.

243 
WFUS53 KMPX 290208
TORMPX
WIC017-290245-
/O.NEW.KMPX.TO.W.0013.210729T0208Z-210729T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
908 PM CDT Wed Jul 28 2021

The National Weather Service in the Twin Cities has issued a

* Tornado Warning for...
  Eastern Chippewa County in west central Wisconsin...

* Until 945 PM CDT.
    
* At 907 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Cornell, or 23 miles northeast of Eau Claire,
  moving southeast at 35 mph.

  HAZARD...Tornado and quarter size hail.

  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.

* Locations impacted include...
  Boyd and Stanley.

# 

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4486 9103 4509 9149 4526 9147 4517 9092
      4486 9092
TIME...MOT...LOC 0207Z 314DEG 29KT 4511 9114 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

JRB

1 follow-up statement

160 
WWUS53 KMPX 290230
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
930 PM CDT Wed Jul 28 2021

WIC017-290245-
/O.CON.KMPX.TO.W.0013.000000T0000Z-210729T0245Z/
Chippewa WI-
930 PM CDT Wed Jul 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
SOUTHEASTERN CHIPPEWA COUNTY...
    
At 930 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Stanley, or 25 miles east of Eau Claire, moving
southeast at 35 mph.

HAZARD...Tornado and quarter size hail.

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.

Locations impacted include...
Stanley, Cadott, Boyd, Otter Lake, Jim Falls and County Roads F And
H.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4503 9137 4511 9092 4486 9092 4486 9103
TIME...MOT...LOC 0230Z 314DEG 29KT 4498 9095 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

CTG

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 7:19 PM CDT	Special Weather Statement	MPX	Rusk	26 min
Jul 28, 7:37 PM CDT	Severe Thunderstorm Warning	MPX	Rusk	23 min
Jul 28, 7:43 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Polk, Rusk	32 min
Jul 28, 8:01 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Rusk	44 min
Jul 28, 8:09 PM CDT	Tornado Warning	MPX	Polk	35 min
Jul 28, 8:46 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Rusk	59 min
Jul 28, 8:55 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Polk	50 min
Jul 28, 9:25 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Saint Croix	65 min
Jul 28, 9:30 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Eau Claire	60 min
Jul 28, 9:36 PM CDT	Tornado Warning	MPX	Saint Croix	24 min
Jul 28, 9:37 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	38 min
Jul 28, 9:55 PM CDT	Tornado Warning	MPX	Saint Croix	35 min
Jul 28, 10:09 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce, Saint Croix	51 min
Jul 28, 10:18 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Eau Claire, Pepin	42 min
Jul 28, 10:21 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	24 min
Jul 28, 10:36 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	39 min
Jul 28, 10:57 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce	48 min

Nearby

Tornado Warnings in Wisconsin, 2021 Every tornado warning in 2021 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.