Alert archive / Wisconsin / Tornado Warnings in 2020

Tornado Warning 25, NWS Twin Cities, MN

July 21, 2020Barron County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 21, 2020, 6:23 PM CDT for Barron County, Wisconsin. It was in force for 52 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 21, 2020, 6:23 PM CDT (23:23 UTC)
Expired: Jul 21, 2020, 7:15 PM CDT
In force: 52 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Barron County, WI

The radar

The Minneapolis radar (KMPX), 159 km from the middle of the area, began a volume at 23:27 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 161 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

116 
WFUS53 KMPX 212323
TORMPX
WIC005-220015-
/O.NEW.KMPX.TO.W.0025.200721T2323Z-200722T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
623 PM CDT Tue Jul 21 2020

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  East central Barron County in northwestern Wisconsin...

* Until 715 PM CDT.

* At 622 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Cameron, or near Rice Lake, moving east at 15 mph.

  HAZARD...Tornado.

  SOURCE...Weather spotters reported funnel cloud.

  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...
  Rice Lake and Cameron around 630 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Canton, Sumner and Rice Lake Airport.

This includes U.S. Highway 53 between mile markers 136 and 143.
 
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 4541 9184 4550 9184 4552 9154 4537 9154
TIME...MOT...LOC 2322Z 279DEG 14KT 4544 9179 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CEO

3 follow-up statements

519 
WWUS53 KMPX 212339
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
639 PM CDT Tue Jul 21 2020

WIC005-220015-
/O.CON.KMPX.TO.W.0025.000000T0000Z-200722T0015Z/
Barron WI-
639 PM CDT Tue Jul 21 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR EAST
CENTRAL BARRON COUNTY...
        
At 638 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Cameron, or near Rice Lake, moving east at 20 mph.

HAZARD...Tornado.

SOURCE...Weather spotters reported a funnel cloud.

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
east central Barron County, including the following locations...
Canton and Sumner.

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 4540 9176 4549 9176 4552 9154 4537 9154
TIME...MOT...LOC 2338Z 270DEG 18KT 4543 9169 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CEO

534 
WWUS53 KMPX 212353
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
653 PM CDT Tue Jul 21 2020

WIC005-220015-
/O.CON.KMPX.TO.W.0025.000000T0000Z-200722T0015Z/
Barron WI-
653 PM CDT Tue Jul 21 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR EAST
CENTRAL BARRON COUNTY...
        
At 652 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Chetek, or 8 miles southeast of Rice Lake, moving
east at 15 mph.

HAZARD...Tornado.

SOURCE...Weather spotters reported a funnel cloud.

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...
Sumner and Canton. 

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 4539 9169 4543 9169 4545 9154 4537 9154
TIME...MOT...LOC 2352Z 277DEG 11KT 4540 9164 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CEO

147 
WWUS53 KMPX 220012
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
712 PM CDT Tue Jul 21 2020

WIC005-220022-
/O.EXP.KMPX.TO.W.0025.000000T0000Z-200722T0015Z/
Barron WI-
712 PM CDT Tue Jul 21 2020

...THE TORNADO WARNING FOR EAST CENTRAL BARRON COUNTY WILL EXPIRE AT
715 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4539 9169 4543 9169 4545 9154 4537 9154
TIME...MOT...LOC 0012Z 279DEG 14KT 4539 9153 

$$

CEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 3:59 PM CDT	Special Weather Statement	MPX	Polk	31 min
Jul 21, 4:31 PM CDT	Special Weather Statement	MPX	Polk	44 min
Jul 21, 5:15 PM CDT	Special Weather Statement	MPX	Polk	60 min
Jul 21, 5:39 PM CDT	Special Weather Statement	MPX	Barron	51 min
Jul 21, 5:39 PM CDT	Tornado Warning	MPX	Barron	36 min
Jul 21, 5:42 PM CDT	Tornado Warning	MPX	Barron, Dunn	33 min
Jul 21, 6:14 PM CDT	Tornado Warning	MPX	Barron	3 min
Jul 21, 6:15 PM CDT	Tornado Warning	MPX	Dunn	60 min
Jul 21, 6:15 PM CDT	Tornado Warning	MPX	Barron	45 min

Nearby

Tornado Warnings in Wisconsin, 2020 Every tornado warning in 2020 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.