Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 181, NWS Twin Cities, MN

July 23, 2011Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 2011, 11:22 PM CDT for Dunn County, Wisconsin. It was in force for 53 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 23, 2011, 11:22 PM CDT (04:22 UTC)
Expired
Jul 24, 2011, 12:15 AM CDT
In force
53 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 128 km from the middle of the area, began a volume at 04:22 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 23, 11:45 PM CDTTSTM WND DMG6 S Menomonie, WITREES DOWNED IN DUNN TOWNSHIP. LOCATION AND TIME ESTIMATED.

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 00:00Z, 4.4 hours before the alert went out and 131 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 2011-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2128 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 2011-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
2128 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
814 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
212 m²/s²
Significant tornado parameter
2.0
Supercell composite
11.7

Open this sounding in Storm Lab

The text

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

208 
WUUS53 KMPX 240422
SVRMPX
WIC033-240515-
/O.NEW.KMPX.SV.W.0181.110724T0422Z-110724T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1122 PM CDT SAT JUL 23 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 1215 AM CDT

* AT 1123 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN EXCESS OF 70
  MPH. THIS STORM WAS LOCATED NEAR SPRING VALLEY...OR ABOUT 15 MILES
  NORTHEAST OF ELLSWORTH...AND MOVING EAST AT 40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MENOMONIE...
  KNAPP...
  TAINTER LAKE...
  ELK MOUND...
  COLFAX...
  INTERSTATE 94...

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 ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4474 9213 4499 9214 4510 9165 4478 9165
TIME...MOT...LOC 0423Z 251DEG 35KT 4488 9217
WIND...HAIL 70MPH 1.00IN

$$
2 follow-up statements
682 
WWUS53 KMPX 240456
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1156 PM CDT SAT JUL 23 2011

WIC033-240515-
/O.CON.KMPX.SV.W.0181.000000T0000Z-110724T0515Z/
DUNN WI-
1156 PM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
DUNN COUNTY UNTIL 1215 AM CDT...

AT 1155 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR ELK MOUND...
OR 9 MILES EAST OF MENOMONIE...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  ELK MOUND...COLFAX...AND INTERSTATE 94.

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 4478 9165 4476 9192 4495 9191 4502 9166
      4493 9164
TIME...MOT...LOC 0456Z 256DEG 47KT 4487 9172
WIND...HAIL 60MPH 1.00IN

$$
562 
WWUS53 KMPX 240510
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1210 AM CDT SUN JUL 24 2011

WIC033-240525-
/O.EXP.KMPX.SV.W.0181.000000T0000Z-110724T0515Z/
DUNN WI-
1210 AM CDT SUN JUL 24 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DUNN COUNTY WILL
EXPIRE AT 1215 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS 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 4478 9165 4476 9192 4495 9191 4502 9166
      4493 9164
TIME...MOT...LOC 0510Z 256DEG 47KT 4491 9147

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 10:29 PM CDTSevere Thunderstorm WarningMPXBarron, Chippewa, Dunn, Rusk46 min
Jul 23, 10:40 PM CDTAreal Flood AdvisoryMPXBarron, Chippewa, Dunn, Rusk2 hr
Jul 23, 10:40 PM CDTSpecial Weather StatementMPXPierce50 min
Jul 23, 10:42 PM CDTSevere Thunderstorm WarningMPXPierce48 min
Jul 23, 10:59 PM CDTSevere Thunderstorm WarningMPXChippewa61 min
Jul 23, 11:14 PM CDTSevere Thunderstorm WarningMPXSaint Croix24 min
Jul 23, 11:50 PM CDTSevere Thunderstorm WarningMPXEau Claire40 min
Jul 24, 12:10 AM CDTSpecial Weather StatementMPXEau Claire50 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.