Alert archive / Wisconsin / Tornado Warnings in 2023

Tornado Warning 5, NWS Twin Cities, MN

May 8, 2023Pierce County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at May 8, 2023, 6:41 PM CDT for Pierce County, Wisconsin. It was in force for 34 min. 1 report 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: May 8, 2023, 6:41 PM CDT (23:41 UTC)
Expired: May 8, 2023, 7:15 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Pierce County, WI

The radar

The Minneapolis radar (KMPX), 102 km from the middle of the area, began a volume at 23:43 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.

What was reported inside it

Time	Report	Where	Remark
May 8, 6:54 PM CDT	HAIL 1	4 N Maiden Rock, WI	LOTS OF HAIL UP TO THE SIZE OF QUARTERS, LASTED FOR ABOUT 5 MINUTES.

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, 11.7 hours before the alert went out and 104 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

967 
WFUS53 KMPX 082341
TORMPX
WIC093-090015-
/O.NEW.KMPX.TO.W.0005.230508T2341Z-230509T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
641 PM CDT Mon May 8 2023

The National Weather Service in the Twin Cities has issued a

* Tornado Warning for...
  Southeastern Pierce County in west central Wisconsin...

* Until 715 PM CDT.
    
* At 641 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles west of Plum City, or 12 miles northeast of Red
  Wing, moving south at 15 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.

* This tornadic thunderstorm will remain over mainly rural areas of
  southeastern Pierce County.

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 4456 9234 4456 9241 4471 9239 4471 9229
      4454 9222 4454 9232
TIME...MOT...LOC 2341Z 354DEG 12KT 4465 9233 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

PEM

1 follow-up statement

743 
WWUS53 KMPX 082358
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
658 PM CDT Mon May 8 2023

WIC093-090015-
/O.CON.KMPX.TO.W.0005.000000T0000Z-230509T0015Z/
Pierce WI-
658 PM CDT Mon May 8 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
SOUTHEASTERN PIERCE COUNTY...
    
At 658 PM CDT, a severe thunderstorm capable of producing a tornado
was located 6 miles north of Frontenac, or 11 miles east of Red Wing,
moving south at 15 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.

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Pierce County.

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 4456 9239 4465 9237 4466 9227 4454 9222
      4454 9232 4456 9234
TIME...MOT...LOC 2358Z 354DEG 12KT 4459 9232 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN

$$

PEM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 4:39 PM CDT	Special Weather Statement	MPX	Saint Croix	36 min
May 8, 5:31 PM CDT	Special Weather Statement	MPX	Dunn	29 min
May 8, 6:21 PM CDT	Severe Thunderstorm Warning	MPX	Pierce	24 min

Nearby

Tornado Warnings in Wisconsin, 2023 Every tornado warning in 2023 Tornadoes in 2023

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.