Alert archive / Iowa / Tornado Watches in 2000

Tornado Watch 776

November 1, 200046 counties in Iowa; 7 counties in Minnesota; 6 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at Nov 1, 2000, 3:00 PM CST for 46 counties in Iowa; 7 counties in Minnesota; 6 counties in Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Nov 1, 2000, 3:00 PM CST (21:00 UTC)
Expired: Nov 1, 2000, 8:00 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 59 counties

Allamakee County, IA, Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Chickasaw County, IA, Clarke County, IA, Clayton County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hardin County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Crawford County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Trempealeau County, WI, Vernon County, WI

Warnings issued inside it

7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Nov 1, 3:03 PM CST	Tornado Warning	DMX	Poweshiek	32 min
Nov 1, 3:08 PM CST	Severe Thunderstorm Warning	DMX	Clarke, Decatur	37 min
Nov 1, 3:12 PM CST	Severe Thunderstorm Warning	DVN	Benton	63 min
Nov 1, 3:19 PM CST	Tornado Warning	DMX	Tama	16 min
Nov 1, 3:59 PM CST	Tornado Warning	DVN	Benton, Buchanan	71 min
Nov 1, 5:01 PM CST	Severe Thunderstorm Warning	DVN	Benton, Linn	44 min
Nov 1, 5:17 PM CST	Severe Thunderstorm Warning	DVN	Buchanan, Delaware	63 min

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 173 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 305 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 152 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.

347 
WWUS9 KMKC 012054
SEL6  

SEL6  
MKC WW 012049
IAZ000-MNZ000-WIZ000-020200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 776
STORM PREDICTION CENTER NORMAN OK
249 PM CST WED NOV 1 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EASTERN IOWA                               
   SOUTHEAST MINNESOTA                          
   SOUTHWEST WISCONSIN                          

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
800 PM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES SOUTH SOUTHWEST OF OTTUMWA IOWA TO 35 MILES
NORTH NORTHWEST OF LA CROSSE 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 775...

DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS ARE EXPECTED TO
CONTINUE TO DEVELOP OVER EASTERN IA AND SPREAD NORTHEASTWARD INTO
PARTS OF MN/IA.  LOCAL VWP/PROFILER DATA SUGGEST STRONG LOW LEVEL
AND DEEP LAYER SHEAR...FAVORABLE FOR SUPERCELLS AND ISOLATED
TORNADOES.  DEGREE OF INSTABILITY AND VERY STRONG LOW/MID LEVEL
WINDS ALSO SUPPORT THE THREAT OF DAMAGING WINDS AND LARGE HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 22040.


...HART

442,0901 403,0912 403,0935 442,0925

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 1, 2:30 PM CST	Tornado Watch	SPC	Becker, Clay, Clearwater, Douglas, Grant, Mahnomen and 4 more	6 hr

Nearby

Tornado Watches in Iowa, 2000 Tornado Watches in Minnesota, 2000 Tornado Watches in Wisconsin, 2000 Every 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.