Alert archive / Minnesota / Tornado Watches in 1997

Tornado Watch 507

June 22, 199718 counties in Minnesota

The Storm Prediction Center issued this tornado watch at Jun 22, 1997, 5:00 PM CDT for 18 counties in Minnesota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 1997, 5:00 PM CDT (22:00 UTC)
Expired
Jun 22, 1997, 10:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, Meeker County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Watonwan County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 134 km from the middle of the area, began a volume at 22:04 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 22, 5:02 PM CDTSevere Thunderstorm WarningFSDLincoln48 min
Jun 22, 5:26 PM CDTTornado WarningFSDLincoln29 min
Jun 22, 5:45 PM CDTSevere Thunderstorm WarningFSDLyon45 min
Jun 22, 5:56 PM CDTTornado WarningFSDLincoln29 min
Jun 22, 6:19 PM CDTSevere Thunderstorm WarningFSDMurray, Pipestone46 min
Jun 22, 6:30 PM CDTSevere Thunderstorm WarningFSDLyon30 min
Jun 22, 6:41 PM CDTSevere Thunderstorm WarningMPXRedwood64 min
Jun 22, 6:58 PM CDTSevere Thunderstorm WarningFSDCottonwood, Murray47 min
Jun 22, 7:15 PM CDTSevere Thunderstorm WarningMPXBrown60 min
Jun 22, 7:16 PM CDTSevere Thunderstorm WarningFSDPipestone34 min
Jun 22, 7:35 PM CDTTornado WarningFSDJackson35 min
Jun 22, 7:43 PM CDTSevere Thunderstorm WarningFSDLincoln32 min
Jun 22, 7:53 PM CDTSevere Thunderstorm WarningFSDCottonwood, Murray32 min
Jun 22, 8:06 PM CDTSevere Thunderstorm WarningMPXWatonwan49 min
Jun 22, 8:11 PM CDTSevere Thunderstorm WarningFSDJackson34 min
Jun 22, 8:17 PM CDTTornado WarningMPXWatonwan48 min
Jun 22, 8:56 PM CDTSevere Thunderstorm WarningMPXMartin34 min

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.0 hours before the alert went out and 165 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 1997-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1997-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1642 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

605 
WWUS9 KMKC 222128
SEL7  
MKC WW 222128
MNZ000-230300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 507
STORM PREDICTION CENTER NORMAN OK
428 PM CDT SUN JUN 22 1997

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

   SOUTHERN MINNESOTA                          

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 500 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 85 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 65 MILES NORTHWEST OF WORTHINGTON MINNESOTA TO
40 MILES EAST SOUTHEAST OF REDWOOD FALLS MINNESOTA.

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 501...WW 503...WW
504...WW 505...WW 506...

DISCUSSION...LARGE SUPERCELL EASTERN SD WILL MOVE INTO SOUTHWESTERN
MN BY 22Z.  POTENTIAL WILL CONTINUE FOR TORNADOS WITH SUPERCELL
INTO MN WHERE STRONG INSTABILITY IS AVAILABLE.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 75 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 580. 
MEAN STORM MOTION VECTOR 29030.


...HALES

451,0963 451,0941 432,0941 432,0963

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 6:00 PM CDTTornado WatchSPCBig Stone5 hr

Nearby

Tornado Watches in Minnesota, 1997Every tornado watch in 1997

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; radar from the NEXRAD Level II archive.