Alert archive / Wisconsin / Tornado Warnings in 2000

Tornado Warning 41, NWS Twin Cities, MN

September 11, 2000Chippewa County, Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Sep 11, 2000, 4:26 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Sep 11, 2000, 4:26 PM CDT (21:26 UTC)
Expired
Sep 11, 2000, 5:15 PM CDT
In force
49 min
Issued by
NWS Twin Cities, MN
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Chippewa County, WI, Eau Claire County, WI

What was reported inside it

TimeReportWhereRemark
Sep 11, 4:39 PM CDTHail 0.75Lake Hallie, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 11, 3:30 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.4 hours before the alert went out and 186 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 12:00Z on 2000-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 277 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 12:00Z on 2000-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
277 J/kg
Mixed-layer CIN
-297 J/kg
Mixed-layer LCL
1331 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KMPX 112128
TORMSP

WIC017-035-112215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
426 PM CDT MON SEP 11 2000

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN
  EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 515 PM CDT

* AT 426 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  STORM CAPABLE OF PRODUCING A TORNADO 5 MILES NORTHWEST OF EAU
  CLAIRE...MOVING EAST AT 35 MPH. SPOTTERS REPORTED ROTATION IN 
  THE THUNDERSTORM BETWEEN EAU CLAIRE AND CHIPPEWA FALLS.

* SOME LOCATIONS IN THE PATH OF THIS TORNADO INCLUDE..
  LAKE WISSOTA.
  EAU CLAIRE.
  CHIPPEWA FALLS.
  CADOTT.
  BOYD.
  ALTOONA.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! THIS WARNING
ALSO REPLACES THE TORNADO WARNING WHICH WAS IN EFFECT FOR SOUTHEAST DUNN COUNTY
UNTIL 430 PM. 

LAT...LON 4496 9161 4478 9160 4476 9070 4500 9071

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 8:59 PM CDTSevere Thunderstorm WarningMPXDunn, Saint Croix46 min
Sep 10, 9:03 PM CDTSevere Thunderstorm WarningMPXChippewa42 min
Sep 10, 9:19 PM CDTSevere Thunderstorm WarningMPXEau Claire41 min
Sep 10, 9:37 PM CDTSevere Thunderstorm WarningMPXPierce, Saint Croix53 min
Sep 10, 9:43 PM CDTSevere Thunderstorm WarningMPXChippewa, Dunn, Eau Claire62 min
Sep 10, 11:28 PM CDTSevere Thunderstorm WarningMPXEau Claire32 min
Sep 10, 11:57 PM CDTSevere Thunderstorm WarningMPXEau Claire48 min
Sep 11, 12:40 AM CDTFlash Flood WarningMPXChippewa, Eau Claire2 hr
Sep 11, 1:39 AM CDTFlash Flood WarningMPXDunn, Pierce81 min
Sep 11, 2:55 AM CDTFlash Flood WarningMPXChippewa, Dunn, Eau Claire, Pierce2 hr
Sep 11, 3:13 PM CDTSevere Thunderstorm WarningMPXDunn, Pierce, Saint Croix47 min
Sep 11, 3:24 PM CDTTornado WarningMPXDunn36 min
Sep 11, 3:41 PM CDTTornado WarningMPXChippewa, Eau Claire49 min
Sep 11, 3:56 PM CDTTornado WarningMPXDunn19 min
Sep 11, 4:03 PM CDTSevere Thunderstorm WarningMPXRusk42 min
Sep 11, 4:16 PM CDTTornado WarningMPXDunn14 min

Nearby

Tornado Warnings in Wisconsin, 2000Every tornado warning in 2000Tornadoes in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.