Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 41, NWS Sioux Falls, SD

June 12, 1990Cottonwood County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 12, 1990, 7:07 PM CDT for Cottonwood County, Minnesota. It was in force for 53 min.

The area

The counties it named.

The facts

Issued: Jun 12, 1990, 7:07 PM CDT (00:07 UTC)
Expired: Jun 12, 1990, 8:00 PM CDT
In force: 53 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Cottonwood County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.1 hours before the alert went out and 157 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: 1326 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 130007
SVRFSD
MNC033-130100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
707 PM CDT TUE JUN 12 1990
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHWEST MINNESOTA
          ...COTTONWOOD
 
AT 705 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN WEST CENTRAL
COTTONWOOD COUNTY IN SOUTHWEST MINNESOTA. THE STORM WAS MOVING NORTH/
EAST AT 40 MPH. SOME CITIES EFFECTED ARE JEFFERS AND MOUNTAIN LAKE.
 
 
 
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jun 12, 2:46 PM CDT, 4 hours 21 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
245 PM CDT TUE JUN 12 1990

STORM DATA FOR MON JUN 11 1990

TIME            COUNTY...LOCATION          CHARACTER OF STORM...DAMAGE

6-630 PM CDT   SULLY COUNTY/SOUTHWEST      NUMEROUS REPORTS OF GOLFBALL
               QUARTER                     SIZE HAIL AND ESTIMATED 60 MPH
                                           WINDS. GRANARY ROOF BLOWN OFF.
                                           CAR AND xHOUSE WINDOWS PUNCHED
                                           OUT. TREES DOWN. COMPLETE
                                           FIELDS WIPED OUT BY HAIL.

Special weather statement, Jun 12, 6:15 PM CDT, 52 minutes before

SDZ004-005-010>012-015>020-130200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
615 PM CDT TUE JUN 12 1990

...WEATHER SHOULD CHANGE RAPIDLY FOR THE SOUTHEAST HALF OF SOUTH DAKOTA
THIS EVENING...

A WIND SHIFT WILL MOVE EAST/NORTHEAST OVER CENTRAL SOUTH DAKOTA TOWARDS
THE JAMES RIVER THROUGH 9 PM CDT AND SHOULD BE FOLLOWED BY BRISK
SOUTHWEST WINDS OF 20 TO 35 MPH. THESE WINDS WERE THE RESULT OF SOME
THUNDERSTORMS DEVELOPING FROM NORTHCENTRAL NEBRASKA INTO CENTRAL SOUTH
DAKOTA. BOATERS ON THE MISSOURI RIVER RESERVIORS SHOULD BEWARE OF THIS
WIND SHIFT AND POSSIBLE THUNDERSTORM DEVELOPMENT UNTIL ABOUT 9 PM CDT.

IN ADDITION SOME THUNDERSTORMS SHOULD DEVELOP IN EASTERN SOUTH DAKOTA
DURING THE EVENING. A FEW OF THE THUNDERSTORMS COULD BECOME LOCALLY
SEVERE SO PLEASE KEEP UP TO DATE ON THE LATEST DEVELOPMENTS.

RYRHOLM

Special weather statement, Jun 12, 6:46 PM CDT, 21 minutes before

SDZ011-017-019-120045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
645 PM CDT TUE JUN 12 1990

...SCATTERED STRONG THUNDERSTORMS WITH HEAVY RAIN WERE DEVELOPING IN A
30 MILE WIDE AREA FROM 20 MILES EAST OF HURON TO BONESTEEL IN SOUTHEAST
GREGORY COUNTY SOUTH DAKOTA. THE STRONGEST STORM WAS LOCATED ABOUT 15
MILES EAST OF HURON. THE STORMS WERE MOVING NORTHEAST AT 40 MPH.

COME COUNTIES EFFECTED FROM 645 PM CDT TO 745 PM CDT ARE KINGSBURY...
MINOR...DAVISAON...HANSON...DOUGLAS...AND CHARLES MIX.
KOSCIELSKI

Special weather statement, Jun 12, 7:07 PM CDT, 0 minutes before

SDZ011-017-019-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
705 PM CDT TUE JUN 12 1990

...TORNADO WATCH IN EFFECT FOR SOUTHEAST SOUTH DAKOTA UNTIL 1 AM CDT...

AT 7 PM CDT SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED IN SOUTHEAST
AND SOUTH CENTRAL SOUTH DAKOTA.

THIS PRECIPITATION EXTENDED FROM 50 MILES WEST OF YANKTON NEAR BUTTE
SOUTH DAKTA TO 35 MILES NORTHWEST OF BROOKINGS NEAR HAYTI.
 BERG

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 8:04 PM CDT	Severe Thunderstorm Warning	FSD	Murray	41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1990 Every severe thunderstorm warning in 1990

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.