Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 114, NWS Twin Cities, MN

July 1, 20116 counties in Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 1, 2011, 9:30 PM CDT for 6 counties in Wisconsin. It was in force for 75 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
Jul 1, 2011, 9:30 PM CDT (02:30 UTC)
Expired
Jul 1, 2011, 10:45 PM CDT
In force
75 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

Counties Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Rusk County, WI

The radar

The La Crosse radar (KARX), 132 km from the middle of the area, began a volume at 02:32 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 1, 9:30 PM CDTTSTM WND DMGEau Galle, WITREE DOWN ACROSS 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 1, 2:08 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.5 hours before the alert went out and 150 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 2011-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4059 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 2011-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.1939587897Sfc1 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
4059 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1509 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
2.5
Supercell composite
20.8

Open this sounding in Storm Lab

The text

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

251 
WUUS53 KMPX 020230
SVRMPX
WIC005-017-033-035-091-107-020345-
/O.NEW.KMPX.SV.W.0114.110702T0230Z-110702T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
930 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BARRON COUNTY IN NORTHWEST WISCONSIN...
  CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN...
  EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN...
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN...
  RUSK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 1045 PM CDT

* AT 925 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES SOUTHEAST
  OF CLAM FALLS TO 5 MILES SOUTHWEST OF RIDGELAND TO PEPIN...AND
  MOVING EAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MENOMONIE...
  DURAND...
  RICE LAKE...
  EAU CLAIRE...
  CHIPPEWA FALLS...
  LADYSMITH...
  RIDGELAND...
  PORCUPINE...
  PEPIN...
  COMSTOCK...
  PRAIRIE FARM...
  BOYCEVILLE...
  KNAPP...
  TURTLE LAKE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO WINDOWS. EVACUATE
MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4537 9091 4460 9091 4459 9201 4441 9207
      4443 9223 4446 9225 4454 9223 4454 9214
      4482 9214 4512 9204 4540 9217 4565 9215
      4564 9068 4538 9067
TIME...MOT...LOC 0230Z 257DEG 45KT 4567 9211 4515 9187
          4440 9212
WIND...HAIL 70MPH <.75IN

$$

JC
2 follow-up statements
305 
WWUS53 KMPX 020318
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1018 PM CDT FRI JUL 1 2011

WIC005-017-033-035-091-107-020345-
/O.CON.KMPX.SV.W.0114.000000T0000Z-110702T0345Z/
BARRON WI-CHIPPEWA WI-DUNN WI-EAU CLAIRE WI-PEPIN WI-RUSK WI-
1018 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RUSK AND
BARRON COUNTIES IN NORTHWEST WISCONSIN...AND PEPIN...EAU CLAIRE...
DUNN AND CHIPPEWA COUNTIES IN WEST CENTRAL WISCONSIN UNTIL 1045 PM
CDT...

AT 1015 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
RESERVE TO HOLCOMBE TO STRUM...MOVING EAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  LADYSMITH...CONRATH...LUDINGTON...SHELDON...TONY...BOYD...GLEN
  FLORA...STANLEY...FAIRCHILD...HAWKINS...AUGUSTA AND INGRAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO WINDOWS. EVACUATE
MOBILE HOMES AS THEY MAY BE OVERTURNED. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4537 9091 4460 9091 4459 9201 4441 9207
      4443 9223 4446 9225 4454 9223 4454 9214
      4482 9214 4512 9204 4540 9217 4565 9215
      4564 9068 4538 9067
TIME...MOT...LOC 0317Z 256DEG 42KT 4580 9128 4528 9105
          4453 9132
WIND...HAIL 70MPH <.75IN

$$

JC
797 
WWUS53 KMPX 020341
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1041 PM CDT FRI JUL 1 2011

WIC005-017-033-035-091-107-020357-
/O.EXP.KMPX.SV.W.0114.000000T0000Z-110702T0345Z/
BARRON WI-CHIPPEWA WI-DUNN WI-EAU CLAIRE WI-PEPIN WI-RUSK WI-
1041 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR RUSK AND BARRON COUNTIES IN
NORTHWEST WISCONSIN...AND PEPIN...EAU CLAIRE...DUNN AND CHIPPEWA
COUNTIES IN WEST CENTRAL WISCONSIN WILL EXPIRE AT 1045 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND MOVED
OUT OF THE WARNED AREA.

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 4537 9091 4460 9091 4459 9201 4441 9207
      4443 9223 4446 9225 4454 9223 4454 9214
      4482 9214 4512 9204 4540 9217 4565 9215
      4564 9068 4538 9067
TIME...MOT...LOC 0342Z 256DEG 42KT 4586 9086 4534 9064
          4459 9093

$$

JC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 7:24 PM CDTSevere Thunderstorm WarningMPXBarron, Polk, Saint Croix66 min
Jul 1, 8:27 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce, Saint Croix63 min
Jul 1, 8:31 PM CDTSevere Thunderstorm WarningMPXBarron, Dunn, Polk, Saint Croix59 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.