Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 39, NWS Twin Cities, MN

July 19, 2011Polk County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 19, 2011, 7:06 PM CDT for Polk County, Wisconsin. It was in force for 39 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
Jul 19, 2011, 7:06 PM CDT (00:06 UTC)
Expired
Jul 19, 2011, 7:45 PM CDT
In force
39 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

County Polk County, WI

The radar

The Minneapolis radar (KMPX), 126 km from the middle of the area, began a volume at 00:06 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

TimeReportWhereRemark
Jul 19, 7:22 PM CDTTSTM WND DMGFrederic, WIPOWER LOST ACROSS TOWN.
Jul 19, 7:40 PM CDTTSTM WND DMG4 Ssw Mckinley, WITREES DOWN. BOATS LIFTED. DOCKS DESTROYED. NUMEROUS BUILDINGS DAMAGED NEAR PIPE LAKE. DAMAGE ALSO REPORTED AROUND JOHNSTOWN TOWNSHIP. TIME ESTIMATED BASED ON RADAR. DAMAGE SURVEY MAY BE NEEDED.
Jul 19, 7:45 PM CDTTSTM WND DMG7 N Range, WITREE DOWN OVER ROAD.

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.

IssuedProductOfficeLasted
Jul 19, 5:43 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 128 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2011-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5426 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2011-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 253 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
5426 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1247 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
330 m²/s²
Significant tornado parameter
4.8
Supercell composite
44.6

Open this sounding in Storm Lab

The text

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

019 
WFUS53 KMPX 200006
TORMPX
WIC095-200045-
/O.NEW.KMPX.TO.W.0039.110720T0006Z-110720T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
706 PM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN POLK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 745 PM CDT

* AT 700 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 3 MILES SOUTH OF
  FREDERIC...AND MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  BALSAM LAKE...
  LUCK...
  FREDERIC...
  MILLTOWN...
  LEWIS...
  CLAM FALLS...
  MCKINLEY...
  RANGE...
  JOEL...
  CLAYTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

&&

LAT...LON 4572 9216 4565 9215 4528 9216 4528 9217
      4551 9260 4565 9256 4565 9254 4573 9254
TIME...MOT...LOC 0007Z 302DEG 20KT 4560 9241

$$

DWE
2 follow-up statements
264 
WWUS53 KMPX 200013
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
713 PM CDT TUE JUL 19 2011

WIC095-200045-
/O.CON.KMPX.TO.W.0039.000000T0000Z-110720T0045Z/
POLK WI-
713 PM CDT TUE JUL 19 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN POLK COUNTY
UNTIL 745 PM CDT...

AT 710 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS STORM
WAS LOCATED NEAR LUCK...OR 10 MILES NORTH OF BALSAM LAKE...MOVING
SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  BALSAM LAKE...MCKINLEY...RANGE...JOEL AND CLAYTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4559 9255 4564 9249 4572 9243 4572 9216
      4565 9215 4528 9216 4528 9217 4551 9260
TIME...MOT...LOC 0013Z 302DEG 20KT 4558 9237

$$
394 
WWUS53 KMPX 200032
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
732 PM CDT TUE JUL 19 2011

WIC095-200045-
/O.CON.KMPX.TO.W.0039.000000T0000Z-110720T0045Z/
POLK WI-
732 PM CDT TUE JUL 19 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN POLK COUNTY
UNTIL 745 PM CDT...

AT 729 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS STORM
WAS LOCATED 6 MILES SOUTHWEST OF MCKINLEY...OR 10 MILES NORTHEAST OF
BALSAM LAKE...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  RANGE...JOEL AND CLAYTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4552 9244 4563 9238 4572 9227 4572 9216
      4565 9215 4528 9216 4528 9217 4544 9247
TIME...MOT...LOC 0033Z 301DEG 20KT 4550 9224

$$

DWE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 7:29 PM CDTTornado WarningMPXBarron61 min
Jul 19, 7:46 PM CDTSevere Thunderstorm WarningMPXPolk44 min
Jul 19, 8:16 PM CDTAreal Flood AdvisoryMPXBarron, Chippewa, Dunn, Rusk3 hr
Jul 19, 8:37 PM CDTSevere Thunderstorm WarningMPXBarron, Chippewa, Dunn, Eau Claire53 min
Jul 19, 8:40 PM CDTFlash Flood WarningMPXBarron, Chippewa, Dunn, Rusk3 hr
Jul 19, 9:42 PM CDTSevere Thunderstorm WarningMPXEau Claire37 min

Nearby

Tornado Warnings in Wisconsin, 2011Every tornado warning in 2011Tornadoes 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.