Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 31, NWS Twin Cities, MN

May 11, 2011Dunn County, Pepin County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 11, 2011, 11:05 AM CDT for Dunn County, Pepin County, Wisconsin. It was in force for 40 min. 3 reports 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 11, 2011, 11:05 AM CDT (16:05 UTC)
Expired: May 11, 2011, 11:45 AM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Dunn County, WI, Pepin County, WI

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 16:08 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
May 11, 11:30 AM CDT	HAIL 1	2 Ssw Menomonie, WI
May 11, 11:33 AM CDT	HAIL 0.75	1 Sw Menomonie, WI
May 11, 11:39 AM CDT	HAIL 0.75	3 N Menomonie, WI

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, 4.1 hours before the alert went out and 134 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: 20 J/kg
Mixed-layer CIN: -538 J/kg
Mixed-layer LCL: 1725 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -98 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

289 
WUUS53 KMPX 111605
SVRMPX
WIC033-091-111645-
/O.NEW.KMPX.SV.W.0031.110511T1605Z-110511T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1105 AM CDT WED MAY 11 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN PEPIN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1145 AM CDT

* AT 1100 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR DURAND...
  AND MOVING NORTH AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MENOMONIE...
  ROCK FALLS...
  CARYVILLE...
  ELK MOUND...
  KNAPP...
  TAINTER LAKE...
  COLFAX...
  WHEELER...
  CONNORSVILLE...
  SAND CREEK...
  RIDGELAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4459 9165 4464 9213 4490 9214 4504 9214
      4522 9216 4520 9167 4518 9165
TIME...MOT...LOC 1605Z 190DEG 40KT 4470 9187
WIND...HAIL <50MPH 1.00IN

$$

TRH

2 follow-up statements

603 
WWUS53 KMPX 111630
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1130 AM CDT WED MAY 11 2011

WIC091-111640-
/O.CAN.KMPX.SV.W.0031.000000T0000Z-110511T1645Z/
PEPIN WI-
1130 AM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PEPIN COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4473 9213 4490 9214 4521 9210 4522 9194
      4520 9167 4518 9166 4512 9165 4471 9165
TIME...MOT...LOC 1630Z 190DEG 38KT 4495 9181

$$

WIC033-111645-
/O.CON.KMPX.SV.W.0031.000000T0000Z-110511T1645Z/
DUNN WI-
1130 AM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DUNN COUNTY
UNTIL 1145 AM CDT...

AT 1125 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR MENOMONIE...MOVING NORTH AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  TAINTER LAKE...COLFAX...WHEELER...CONNORSVILLE...SAND CREEK...
  RIDGELAND AND BOYCEVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4473 9213 4490 9214 4521 9210 4522 9194
      4520 9167 4518 9166 4512 9165 4471 9165
TIME...MOT...LOC 1630Z 190DEG 38KT 4495 9181
WIND...HAIL <50MPH 1.00IN

$$

TRH

357 
WWUS53 KMPX 111642
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1142 AM CDT WED MAY 11 2011

WIC033-111651-
/O.EXP.KMPX.SV.W.0031.000000T0000Z-110511T1645Z/
DUNN WI-
1142 AM CDT WED MAY 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR DUNN COUNTY WILL EXPIRE AT
1145 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS 
THUNDERSTORM. THERE HAVE BEEN NUMEROUS REPORTS OF QUARTER TO HALF 
INCH HAIL WITH THIS STORM... AND HAIL TO PENNY SIZE REMAINS POSSIBLE 
AS IT CONTINUES TO MOVE NORTH. IF THE STORM RE-INTENSIFIES A NEW 
SEVERE THUNDERSTORM WARNING MAY BE NEEDED.

LAT...LON 4473 9213 4490 9214 4521 9210 4522 9194
      4520 9167 4518 9166 4512 9165 4471 9165
TIME...MOT...LOC 1641Z 190DEG 38KT 4506 9178

$$

TRH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:09 PM CDT	Special Weather Statement	MPX	Polk	66 min
May 10, 10:43 PM CDT	Severe Thunderstorm Warning	MPX	Polk	47 min
May 10, 11:28 PM CDT	Severe Thunderstorm Warning	MPX	Polk	47 min
May 11, 9:51 AM CDT	Special Weather Statement	MPX	Chippewa, Dunn, Eau Claire	54 min
May 11, 11:01 AM CDT	Special Weather Statement	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk	74 min
May 11, 12:43 PM CDT	Special Weather Statement	MPX	Rusk	47 min
May 11, 12:50 PM CDT	Severe Thunderstorm Warning	MPX	Rusk	25 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning in 2011

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.