Tornado Watch 714

Issued

Aug 23, 1997, 5:30 PM CDT (22:30 UTC)

Expired

Aug 23, 1997, 11:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The La Crosse radar (KARX), 49 km from the middle of the area, began a volume at 22:33 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.

967 
WWUS9 KMKC 232216
SEL4  
MKC WW 232216
MNZ000-WIZ000-IAZ000-240400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 714
STORM PREDICTION CENTER NORMAN OK
516 PM CDT SAT AUG 23 1997

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

   SOUTHEAST MINNESOTA                          
   WESTERN WISCONSIN                          
   NORTHEAST IOWA                               

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
1100 PM CDT.

TORNADOES...HAIL TO 2 1/4 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 55 MILES NORTHWEST OF EAU CLAIRE WISCONSIN TO 55
MILES SOUTH SOUTHWEST OF LONEROCK 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.

DISCUSSION...POTENTIAL FOR SUPERCELLS AND POSSIBLE TORNADOES THIS
EVENING IN WARM ADVECTION ZONE OVER THE UPPER MISSISSIPPI VALLEY. 
STRONG LOW-LEVEL VEERING PROFILE...COUPLED WITH AMPLE BOUNDARY
LAYER MOISTURE AND ELEVATED PLUME OF STEEP LAPSE RATES SPREADING E
FROM THE DAKOTAS FAVORABLE FOR STORMS WITH SUSTAINED UPDRAFTS AND
ROTATION.     

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 1/4 INCHES.  EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
520.  MEAN STORM MOTION VECTOR 32530.


...CORFIDI

452,0904 422,0890 422,0920 452,0934

Tornado Watches in Wisconsin, 1997Tornado Watches in Minnesota, 1997Tornado Watches in Iowa, 1997Every tornado watch in 1997

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; radar from the NEXRAD Level II archive.