Alert archive / Wisconsin / Tornado Watches in 1998

Tornado Watch 680

June 26, 1998Houston County, Minnesota; 22 counties in Wisconsin

The Storm Prediction Center issued this tornado watch at Jun 26, 1998, 10:00 PM CDT for Houston County, Minnesota; 22 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 1998, 10:00 PM CDT (03:00 UTC)
Expired
Jun 27, 1998, 4:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 23 counties

Houston County, MN, Adams County, WI, Calumet County, WI, Clark County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, La Crosse County, WI, Marquette County, WI, Monroe County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Vernon County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 26, 10:08 PM CDTSevere Thunderstorm WarningARXJackson62 min
Jun 26, 10:53 PM CDTSevere Thunderstorm WarningARXClark67 min
Jun 26, 11:06 PM CDTSevere Thunderstorm WarningGRBWood59 min
Jun 26, 11:07 PM CDTSevere Thunderstorm WarningARXJackson63 min
Jun 26, 11:20 PM CDTFlash Flood WarningARXClark3 hr
Jun 26, 11:49 PM CDTSevere Thunderstorm WarningARXLa Crosse71 min
Jun 27, 12:07 AM CDTSevere Thunderstorm WarningARXJackson83 min
Jun 27, 12:21 AM CDTSevere Thunderstorm WarningARXMonroe69 min
Jun 27, 12:29 AM CDTSevere Thunderstorm WarningARXFillmore, Houston61 min
Jun 27, 12:43 AM CDTFlash Flood WarningARXJackson, La Crosse, Monroe, Trempealeau5 hr
Jun 27, 12:43 AM CDTFlash Flood WarningARXClark5 hr
Jun 27, 12:43 AM CDTSevere Thunderstorm WarningARXVernon62 min
Jun 27, 12:43 AM CDTFlash Flood WarningGRBWood4 hr
Jun 27, 1:05 AM CDTSevere Thunderstorm WarningARXAdams, Juneau70 min
Jun 27, 1:11 AM CDTSevere Thunderstorm WarningGRBWood64 min
Jun 27, 1:30 AM CDTFlash Flood WarningGRBPortage, Waupaca4 hr
Jun 27, 1:33 AM CDTSevere Thunderstorm WarningGRBPortage, Waushara62 min
Jun 27, 1:36 AM CDTSevere Thunderstorm WarningARXCrawford, Richland84 min
Jun 27, 1:40 AM CDTSevere Thunderstorm WarningARXVernon50 min
Jun 27, 1:44 AM CDTSevere Thunderstorm WarningMKXSauk91 min
Jun 27, 1:44 AM CDTSevere Thunderstorm WarningMKXMarquette91 min
Jun 27, 2:22 AM CDTSevere Thunderstorm WarningMKXColumbia, Green Lake88 min
Jun 27, 2:26 AM CDTFlash Flood WarningARXVernon3 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.0 hours before the alert went out and 182 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, Green Bay/Straub, WI at 00:00Z on 1998-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1537 joules per kilogram.LCLEL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 1998-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.193958Sfc1 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
1537 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

965 
WWUS9 KMKC 270230
SEL0  
MKC WW 270230
WIZ000-270900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 680
STORM PREDICTION CENTER NORMAN OK
930 PM CDT FRI JUN 26 1998

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

   CENTRAL AND SOUTHERN WISCONSIN                          

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 945 PM UNTIL
400 AM 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 80 STATUTE MILES EITHER SIDE OF
A LINE FROM 10 MILES SOUTHWEST OF LONEROCK WISCONSIN TO 20 MILES
EAST SOUTHEAST OF MOSINEE 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 669...WW 677...WW
678...WW 679...

DISCUSSION...SEVERE STORMS NOW IN SRN MN/WRN WI EXPECTED TO SPREAD
ESE INTO CENTRAL/SRN WI LATER THIS EVENING AS MID-LEVEL SPEED MAX
UNDERCUTTING SD VORT CONTINUES E ACROSS THE UPPER MS VALLEY. 
INCREASING MID-LEVEL FLOW...SELY SURFACE WINDS AND HIGH SURFACE  
DEWPOINTS SUGGEST POTENTIAL FOR SUPERCELLS AND POSSIBLY TORNADOES.

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 550. 
MEAN STORM MOTION VECTOR 27030.

...CORFIDI

433,0914 450,0904 441,0874 423,0885

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 8:30 PM CDTSevere Thunderstorm WatchSPCAitkin, Carlton, Cass, Crow Wing, Douglas, Hubbard and 6 more7 hr
Jun 26, 8:30 PM CDTTornado WatchSPCAnoka, Blue Earth, Brown, Carver, Chippewa, Chisago and 34 more7 hr
Jun 27, 4:00 PM CDTTornado WatchSPCAnoka, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 32 more6 hr
Jun 27, 2:45 AM CDTSevere Thunderstorm WatchSPCCalumet, Columbia, Dane, Dodge, Fond du Lac, Grant and 14 more4 hr

Nearby

Tornado Watches in Wisconsin, 1998Tornado Watches in Minnesota, 1998Every tornado watch in 1998

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.