Alert archive / Wisconsin / Tornado Warnings in 2020

Tornado Warning 20, NWS Twin Cities, MN

July 21, 2020Barron County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 21, 2020, 5:39 PM CDT for Barron County, Wisconsin. It was in force for 36 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, 5:39 PM CDT (22:39 UTC)
Expired: Jul 21, 2020, 6:15 PM CDT
In force: 36 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), 129 km from the middle of the area, began a volume at 22:43 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, 10.7 hours before the alert went out and 132 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.

518 
WFUS53 KMPX 212239
TORMPX
WIC005-212315-
/O.NEW.KMPX.TO.W.0020.200721T2239Z-200721T2315Z/

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

The National Weather Service in The Twin Cities has issued a

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

* Until 615 PM CDT.
    
* At 539 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Clayton, or 22 miles southwest of Rice Lake,
  moving east at 5 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
  west central Barron County, including the following locations...
  Arland.

# 

# 

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 4531 9201 4533 9216 4538 9216 4538 9215
      4539 9200
TIME...MOT...LOC 2239Z 268DEG 6KT 4534 9214 

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

$$

JRB

2 follow-up statements

213 
WWUS53 KMPX 212250
SVSMPX

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

WIC005-212315-
/O.CON.KMPX.TO.W.0020.000000T0000Z-200721T2315Z/
Barron WI-
550 PM CDT Tue Jul 21 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR WEST
CENTRAL BARRON COUNTY...
    
At 549 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Clayton, or 21 miles southwest of Rice Lake, moving
east at 5 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.

Locations impacted include...
Arland.

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 4531 9201 4534 9212 4537 9212 4539 9200
TIME...MOT...LOC 2249Z 268DEG 6KT 4534 9212 

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

$$

CEO

897 
WWUS53 KMPX 212300 RRA
SVSMPX

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

WIC005-212315-
/O.CON.KMPX.TO.W.0020.000000T0000Z-200721T2315Z/
Barron WI-
600 PM CDT Tue Jul 21 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR WEST
CENTRAL BARRON COUNTY...
        
At 600 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Almena, or 17 miles southwest of Rice Lake, moving
east at 10 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...
Arland.

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 4532 9201 4533 9205 4538 9206 4539 9200
TIME...MOT...LOC 2300Z 267DEG 10KT 4534 9201 

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

$$

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, 5:42 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
Jul 21, 6:23 PM CDT	Tornado Warning	MPX	Barron	52 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.