Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 40, NWS Twin Cities, MN

July 19, 2011Barron County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Jul 19, 2011, 7:29 PM CDT for Barron County, Wisconsin. It was in force for 61 min. 5 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, 7:29 PM CDT (00:29 UTC)
Expired
Jul 19, 2011, 8:30 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

County Barron County, WI

The radar

The Minneapolis radar (KMPX), 143 km from the middle of the area, began a volume at 00:29 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, 7:47 PM CDTFUNNEL CLOUDTurtle Lake, WI
Jul 19, 7:51 PM CDTFUNNEL CLOUD4 S Turtle Lake, WIFUNNEL APPEARS TO HAVE GONE BACK UP.
Jul 19, 7:52 PM CDTTSTM WND DMGTurtle Lake, WITREE DAMAGE
Jul 19, 7:56 PM CDTTSTM WND DMG1 E Clayton, WILARGE BRANCHES DOWN. STRONG WIND LASTED FOR 10-15 MINUTES.
Jul 19, 8:15 PM CDTHAIL 1Comstock, WI

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, 0.5 hours before the alert went out and 145 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°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.

679 
WFUS53 KMPX 200029
TORMPX
WIC005-200130-
/O.NEW.KMPX.TO.W.0040.110720T0029Z-110720T0130Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BARRON COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 830 PM CDT

* AT 729 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 9 MILES NORTHWEST
  OF COMSTOCK...OR ABOUT 4 MILES SOUTHWEST OF MCKINLEY...AND MOVING
  SOUTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  CUMBERLAND...
  COMSTOCK...
  TURTLE LAKE...
  PRAIRIE FARM...
  ALMENA...

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 4563 9180 4521 9196 4524 9215 4564 9215
TIME...MOT...LOC 0030Z 306DEG 18KT 4553 9223

$$

DWE
2 follow-up statements
848 
WWUS53 KMPX 200049
SVSMPX

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

WIC005-200130-
/O.CON.KMPX.TO.W.0040.000000T0000Z-110720T0130Z/
BARRON WI-
749 PM CDT TUE JUL 19 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN BARRON COUNTY
UNTIL 830 PM CDT...

AT 747 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A FUNNEL.  THIS
FUNNEL WAS LOCATED NEAR TURTLE LAKE...OR 12 MILES NORTHEAST OF
AMERY...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  PRAIRIE FARM AND ALMENA.

LAT...LON 4563 9180 4521 9196 4524 9215 4564 9215
TIME...MOT...LOC 0049Z 306DEG 18KT 4539 9213

$$

DWE
317 
WWUS53 KMPX 200100
SVSMPX

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

WIC005-200130-
/O.CON.KMPX.TO.W.0040.000000T0000Z-110720T0130Z/
BARRON WI-
800 PM CDT TUE JUL 19 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN BARRON COUNTY
UNTIL 830 PM CDT...

AT 756 PM CDT...TRAINED WEATHER SPOTTERS REPORTED STRONG ROTATION.
THE SEVERE STORM WAS LOCATED NEAR TURTLE LAKE...OR 14 MILES EAST OF 
AMERY...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  PRAIRIE FARM.

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 4563 9180 4521 9196 4524 9215 4564 9215
TIME...MOT...LOC 0100Z 306DEG 18KT 4536 9207

$$

DWE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 7:06 PM CDTTornado WarningMPXPolk39 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.