Alert archive / Wisconsin / Tornado Watches in 2000
Tornado Watch 730
The Storm Prediction Center issued this tornado watch at Sep 11, 2000, 3:30 PM CDT for 4 counties in Iowa; 6 counties in Minnesota; 12 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 2000, 3:30 PM CDT (20:30 UTC)
- Expired
- Sep 11, 2000, 8:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Allamakee County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Pepin County, WI, Rusk County, WI, Taylor County, WI, Trempealeau County, WI
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 3:41 PM CDT | Tornado Warning | MPX | Chippewa, Eau Claire | 49 min |
| Sep 11, 3:56 PM CDT | Tornado Warning | MPX | Dunn | 19 min |
| Sep 11, 4:03 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 42 min |
| Sep 11, 4:16 PM CDT | Tornado Warning | MPX | Dunn | 14 min |
| Sep 11, 4:26 PM CDT | Tornado Warning | MPX | Chippewa, Eau Claire | 49 min |
| Sep 11, 4:27 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 63 min |
| Sep 11, 4:57 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 63 min |
| Sep 11, 4:57 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 63 min |
| Sep 11, 5:01 PM CDT | Severe Thunderstorm Warning | ARX | Winona | 59 min |
| Sep 11, 5:46 PM CDT | Severe Thunderstorm Warning | ARX | Jackson | 74 min |
| Sep 11, 5:56 PM CDT | Severe Thunderstorm Warning | ARX | Clark | 64 min |
| Sep 11, 6:17 PM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 28 min |
| Sep 11, 6:32 PM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe | 58 min |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 161 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
080 WWUS9 KMKC 112013 SEL0 SEL0 MKC WW 112006 IAZ000-MNZ000-WIZ000-120100- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 730 STORM PREDICTION CENTER NORMAN OK 306 PM CDT MON SEP 11 2000 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EXTREME NORTHEAST IOWA SOUTHEAST MINNESOTA WESTERN WISCONSIN EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 330 PM UNTIL 800 PM CDT. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH SOUTHEAST OF ROCHESTER MINNESOTA TO 55 MILES NORTH NORTHEAST OF EAU CLAIRE WISCONSIN. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 728...WW 729... DISCUSSION...STORMS CONTINUE TO INTENSIFY RAPIDLY JUST AHEAD OF SURFACE LOW IN VERY UNSTABLE AIR OVER WRN WI. SFC BASED CAPES ARE 3000 TO 4500 J/KG IN THE WARM SECTOR JUSTAHEAD APPROACHING COLD FRONT. FAVORABLE 0-6 KM SHEAR OF 50-70 KT IS ALSO PRESENT TO PROMOTE SUPERCELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25035. ...MCCARTHY 453,0900 430,0910 430,0930 453,0920
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 9 more | 6 hr |
| Sep 11, 1:15 PM CDT | Tornado Watch | SPC | Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 21 more | 6 hr |
| Sep 11, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Davis, Decatur, Henry, Jefferson and 8 more | 5 hr |
| Sep 11, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Green, Kenosha, Rock, Walworth | 6 hr |
| Sep 11, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calumet, Columbia, Crawford, Dodge and 26 more | 6 hr |
Nearby
Tornado Watches in Wisconsin, 2000Tornado Watches in Minnesota, 2000Tornado Watches in Iowa, 2000Every tornado watch 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; the sounding from the Mesonet's radiosonde archive.