Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Twin Cities, MN

May 15, 2021Pierce County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 15, 2021, 5:44 PM CDT for Pierce County, Wisconsin. It was in force for 46 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 15, 2021, 5:44 PM CDT (22:44 UTC)
Expired: May 15, 2021, 6:30 PM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Pierce County, WI

The radar

The Minneapolis radar (KMPX), 103 km from the middle of the area, began a volume at 22:46 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 15, 5:52 PM CDT	HAIL 1	4 Nnw El Paso, WI	RELAYED VIA COCORAHS.

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, 10.7 hours before the alert went out and 106 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: 894 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS53 KMPX 152244
SVRMPX
WIC093-152330-
/O.NEW.KMPX.SV.W.0017.210515T2244Z-210515T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
544 PM CDT Sat May 15 2021

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northeastern Pierce County in west central Wisconsin...

* Until 630 PM CDT.

* At 544 PM CDT, a severe thunderstorm was located 7 miles south of
  Woodville, or 14 miles east of River Falls, moving southeast at 25
  mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Plum City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

If on or near a lake or river, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4463 9231 4486 9242 4486 9231 4485 9225
      4469 9213 4463 9214
TIME...MOT...LOC 2244Z 329DEG 22KT 4485 9231 

HAIL...1.25IN
WIND...60MPH
 
$$

ETA

2 follow-up statements

801 
WWUS53 KMPX 152311
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
611 PM CDT Sat May 15 2021

WIC093-152330-
/O.CON.KMPX.SV.W.0017.000000T0000Z-210515T2330Z/
Pierce WI-
611 PM CDT Sat May 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR EAST CENTRAL PIERCE COUNTY...

At 611 PM CDT, a severe thunderstorm was located near Plum City, or
19 miles southwest of Menomonie, moving southeast at 25 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Plum City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

If boating on a lake or river, get away from the water and move 
indoors or inside a vehicle. remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4463 9231 4476 9235 4479 9229 4480 9221
      4469 9213 4463 9214
TIME...MOT...LOC 2311Z 329DEG 22KT 4471 9219 

HAIL...1.25IN
WIND...60MPH
 
$$

ETA

277 
WWUS53 KMPX 152328
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
628 PM CDT Sat May 15 2021

WIC093-152338-
/O.EXP.KMPX.SV.W.0017.000000T0000Z-210515T2330Z/
Pierce WI-
628 PM CDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIERCE COUNTY
WILL EXPIRE AT 630 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4463 9231 4476 9235 4479 9229 4480 9221
      4469 9213 4463 9214
TIME...MOT...LOC 2328Z 329DEG 22KT 4463 9212 

$$

ETA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 3:48 PM CDT	Special Weather Statement	MPX	Polk	27 min
May 15, 4:07 PM CDT	Severe Thunderstorm Warning	MPX	Polk	23 min
May 15, 4:29 PM CDT	Severe Thunderstorm Warning	MPX	Polk	22 min
May 15, 4:50 PM CDT	Special Weather Statement	MPX	Saint Croix	40 min
May 15, 5:07 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	23 min
May 15, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	33 min
May 15, 6:28 PM CDT	Severe Thunderstorm Warning	MPX	Pepin, Pierce	62 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.