Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 49, NWS Twin Cities, MN

May 9, 2022Dunn County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 9, 2022, 6:57 PM CDT for Dunn County, Saint Croix County, Wisconsin. It was in force for 33 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 9, 2022, 6:57 PM CDT (23:57 UTC)
Expired: May 9, 2022, 7:30 PM CDT
In force: 33 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Dunn County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 23:57 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 9, 7:25 PM CDT	TORNADO	1 E Knapp, WI	DOZENS OF TREES WERE BROKEN, INCLUDING AT A HOME EAST OF KNAPP. THE PATH LENGTH WAS 0.7 MILES. THE TORNADO WAS RATED EF0 WITH ESTIMATED MAXIMUM WINDS OF 80 MPH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 9, 2:50 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 12.0 hours before the alert went out and 107 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: 892 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 364 m²/s²
0-3 km storm-relative helicity: 413 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

790 
WUUS53 KMPX 092357
SVRMPX
WIC033-109-100030-
/O.NEW.KMPX.SV.W.0049.220509T2357Z-220510T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
657 PM CDT Mon May 9 2022

The National Weather Service in the Twin Cities has issued a

* Severe Thunderstorm Warning for...
  West central Dunn County in west central Wisconsin...
  Southeastern St. Croix County in west central Wisconsin...

* Until 730 PM CDT.

* At 656 PM CDT, a severe thunderstorm was located near Woodville, or
  12 miles east of River Falls, moving northeast at 40 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Woodville around 705 PM CDT.
  Knapp around 715 PM CDT.

Other locations in the path of this severe thunderstorm include
Boyceville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

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

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

&&

LAT...LON 4485 9232 4486 9233 4486 9239 4490 9245
      4506 9212 4503 9205 4495 9202
TIME...MOT...LOC 2356Z 238DEG 35KT 4489 9236 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

ETA

1 follow-up statement

206 
WWUS53 KMPX 100018
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
718 PM CDT Mon May 9 2022

WIC109-100028-
/O.CAN.KMPX.SV.W.0049.000000T0000Z-220510T0030Z/
St. Croix WI-
718 PM CDT Mon May 9 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ST. CROIX COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

LAT...LON 4491 9214 4505 9214 4505 9213 4506 9212
      4503 9205 4495 9202
TIME...MOT...LOC 0018Z 238DEG 35KT 4500 9210 

$$

WIC033-100030-
/O.CON.KMPX.SV.W.0049.000000T0000Z-220510T0030Z/
Dunn WI-
718 PM CDT Mon May 9 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR WEST CENTRAL DUNN COUNTY...

At 718 PM CDT, a severe thunderstorm was located near Knapp, or 12
miles northwest of Menomonie, moving northeast at 40 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of west
central Dunn County, including the following locations... Downing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for west central
Wisconsin.

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

&&

LAT...LON 4491 9214 4505 9214 4505 9213 4506 9212
      4503 9205 4495 9202
TIME...MOT...LOC 0018Z 238DEG 35KT 4500 9210 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

ETA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 10:13 AM CDT	Severe Thunderstorm Warning	MPX	Polk	47 min
May 9, 10:26 AM CDT	Severe Thunderstorm Warning	MPX	Polk	34 min
May 9, 10:43 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MPX	Barron, Polk	30 min
May 9, 5:03 PM CDT	Severe Thunderstorm Warning	MPX	Polk	42 min
May 9, 5:15 PM CDT	Severe Thunderstorm Warning	MPX	Pierce	45 min
May 9, 5:20 PM CDT	Tornado Warning	MPX	Polk	25 min
May 9, 5:27 PM CDT	Tornado Warning	MPX	Pierce	33 min
May 9, 5:40 PM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	35 min
May 9, 6:00 PM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	45 min
May 9, 6:04 PM CDT	Severe Thunderstorm Warning	MPX	Polk	41 min
May 9, 6:12 PM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	33 min
May 9, 6:38 PM CDT	Tornado Warning	MPX	Dunn	37 min
May 9, 6:48 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce	42 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2022 Every severe thunderstorm warning in 2022

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.