Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 120, NWS Twin Cities, MN

July 10, 20114 counties in Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 10, 2011, 6:16 AM CDT for 4 counties in Wisconsin. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 10, 2011, 6:16 AM CDT (11:16 UTC)
Expired
Jul 10, 2011, 7:15 AM CDT
In force
59 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Dunn County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI

The radar

The La Crosse radar (KARX), 117 km from the middle of the area, began a volume at 11:20 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.3 hours before the alert went out and 126 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 2011-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1607 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 2011-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.19395878Sfc1 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
1607 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1076 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.9
Supercell composite
7.3

Open this sounding in Storm Lab

The text

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

167 
WUUS53 KMPX 101116
SVRMPX
WIC033-091-093-109-101215-
/O.NEW.KMPX.SV.W.0120.110710T1116Z-110710T1215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
616 AM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN...
  EASTERN PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
  SOUTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 715 AM CDT

* AT 612 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HAMMOND TO 6 MILES
  SOUTHWEST OF ELMWOOD TO FRONTENAC...AND MOVING EAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  DURAND...
  MENOMONIE...
  BALDWIN...
  SPRING VALLEY...
  WOODVILLE...
  PLUM CITY...
  ELMWOOD...
  STOCKHOLM...
  BOYCEVILLE...
  EMERALD...
  WILSON...
  EAU GALLE...
  GLENWOOD CITY...
  PORCUPINE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4459 9174 4459 9201 4450 9204 4444 9223
      4448 9229 4454 9232 4466 9222 4506 9245
      4521 9184 4491 9164 4476 9165
TIME...MOT...LOC 1115Z 254DEG 27KT 4499 9238 4472 9219
          4447 9235
WIND...HAIL 60MPH <.75IN

$$
1 follow-up statement
421 
WWUS53 KMPX 101145
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
645 AM CDT SUN JUL 10 2011

WIC033-091-093-109-101215-
/O.CON.KMPX.SV.W.0120.000000T0000Z-110710T1215Z/
DUNN WI-PEPIN WI-ST. CROIX WI-PIERCE WI-
645 AM CDT SUN JUL 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
PIERCE...SOUTHEASTERN ST. CROIX...NORTHEASTERN PEPIN AND DUNN
COUNTIES UNTIL 715 AM CDT...

AT 640 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
GLENWOOD CITY TO EAU GALLE TO ELLA...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  DURAND...MENOMONIE...WHEELER...TAINTER LAKE...COLFAX...ELK MOUND...
  ROCK FALLS AND CARYVILLE.

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 4459 9174 4459 9201 4463 9209 4475 9214
      4508 9236 4521 9184 4491 9164 4476 9165
TIME...MOT...LOC 1145Z 254DEG 27KT 4508 9206 4474 9197
          4453 9205
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 5:27 AM CDTSpecial Weather StatementMPXPierce, Saint Croix63 min
Jul 10, 5:32 AM CDTSevere Thunderstorm WarningMPXPierce, Saint Croix58 min
Jul 10, 7:28 AM CDTSpecial Weather StatementMPXChippewa, Eau Claire47 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.