Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 171, NWS Twin Cities, MN

August 7, 1994Scott County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 7, 1994, 6:54 PM CDT for Scott County, Sibley County, Minnesota. It was in force for 36 min.

The area

The counties it named.

The facts

Issued
Aug 7, 1994, 6:54 PM CDT (23:54 UTC)
Expired
Aug 7, 1994, 7:30 PM CDT
In force
36 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Scott County, MN, Sibley County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.9 hours before the alert went out and 34 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 1994-08-07Temperature 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 1994-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
171 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.

000 
WUUS1 KMSP 072354 RRA
SVRMSP
MNC143-139-080030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
654 PM CDT SUN AUG 7 1994
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MINNESOTA
 
   ...EASTERN SIBLEY COUNTY
 
IN EAST CENTRAL MINNESOTA
 
   ...WESTERN SCOTT COUNTY
 
AT 650 PM..RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF
COLOGNE OR 20 MILES WEST SOUTHWEST OF MINNEAPOLIS. THE THUNDERSTORM WAS
MOVING TO THE SOUTH AT 15 TO 20 MILES AN HOUR. COMMUNITIES IN THE PATH
OF THIS SEVERE THUNDERSTORM INCLUDE NEW PRAGUE AND JORDAN IN SCOTT
COUNTY...HENDERSON AND NEW ROME IN SIBLEY COUNTY.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...LARGE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR PROTECTION
MOVE TO AN INTERIOR ROOM.  PEOPLE IN MOBILE HOMES SHOULD GO
TO A STORM SHELTER.
SCOTT/SCHALLER

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, Aug 7, 5:30 PM CDT, 1 hour 24 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
530 PM CDT AUG 7 1994

TIME          EVENT

430 PM        3/4 INCH  HAIL AT SULLIVAN LAKE RESORT IN MORRISON
              COUNTY...25 MILES NORTHEAST OF LITTLE FALLS.

520 PM        GOLF BALL SIZE HAIL (13/4 INCH) HAIL AT WOOD LAKE
              IN YELLOW MEDICINE COUNTY...10 MILES SOUTH OF GRANITE
              FALLS.

FRASER
Special weather statement, Aug 7, 6:08 PM CDT, 46 minutes before
MNZ041-042-046>048-072345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
608 PM CDT SUN AUG 7 1994

...PORTION OF WEST CENTRAL MINNESOTA CLEARED FROM SEVERE THUNDERSTORM
WATCH...

A PORTION OF WEST CENTRAL MINNESOTA HAS BEEN CLEARED FROM THE SEVERE
THUNDERSTORM WATCH ISSUED ABOUT 330 PM THIS AFTERNOON.  THE COUNTIES
CLEARED FROM THE WATCH ARE TODD...DOUGLAS...POPE...STEVENS...AND BIG
STONE.

THE REMAINDER OF CENTRAL MINNESOTA INCLUDING THE TWIN CITIES ARE
STILL UNDER A SEVERE THUNDERSTORM WATCH UNTIL 10 PM.  ALL OF
SOUTHERN MINNESOTA INCLUDING ROCHESTER IS UNDER A SEVERE
THUNDERSTORM WATCH UNTIL 1 AM.

KAVINSKY
Special weather statement, Aug 7, 6:10 PM CDT, 44 minutes before
MNZ041-042-046>048-072345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
608 PM CDT SUN AUG 7 1994

...PORTION OF WEST CENTRAL MINNESOTA CLEARED FROM SEVERE THUNDERSTORM
WATCH...

A PORTION OF WEST CENTRAL MINNESOTA HAS BEEN CLEARED FROM THE SEVERE
THUNDERSTORM WATCH ISSUED ABOUT 330 PM THIS AFTERNOON.  THE COUNTIES
CLEARED FROM THE WATCH ARE TODD...DOUGLAS...POPE...STEVENS...AND BIG
STONE.

THE REMAINDER OF CENTRAL MINNESOTA INCLUDING THE TWIN CITIES ARE
STILL UNDER A SEVERE THUNDERSTORM WATCH UNTIL 10 PM.  ALL OF
SOUTHERN MINNESOTA INCLUDING ROCHESTER IS UNDER A SEVERE
THUNDERSTORM WATCH UNTIL 1 AM.

KAVINSKY
Local storm report, Aug 7, 6:18 PM CDT, 36 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
620 PM CDT AUG 7 1994

TIME          EVENT

430 PM        3/4 INCH  HAIL AT SULLIVAN LAKE RESORT IN MORRISON
              COUNTY...25 MILES NORTHEAST OF LITTLE FALLS.

520 PM        GOLF BALL SIZE HAIL (13/4 INCH) HAIL AT WOOD LAKE
              IN YELLOW MEDICINE COUNTY...10 MILES SOUTH OF GRANITE
              FALLS.

538 PM        BRIEF TORNADO TOUCHDOWN SOUTH OF BLOMKEST ON THE
              KANDIYOHI/RENVILLE COUNTIES BORDER...15 MILES SOUTH OF
              WILLMAR.

MCBEATH PETERS

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 4:44 PM CDTSevere Thunderstorm WarningMPXMille Lacs61 min
Aug 7, 5:12 PM CDTSevere Thunderstorm WarningMPXMeeker63 min
Aug 7, 5:17 PM CDTSevere Thunderstorm WarningMPXYellow Medicine43 min
Aug 7, 5:27 PM CDTSevere Thunderstorm WarningMPXRedwood48 min
Aug 7, 5:40 PM CDTTornado WarningMPXKandiyohi35 min
Aug 7, 5:47 PM CDTTornado WarningMPXRenville28 min
Aug 7, 6:22 PM CDTSevere Thunderstorm WarningMPXRenville38 min
Aug 7, 6:35 PM CDTSevere Thunderstorm WarningMPXRedwood25 min
Aug 7, 6:44 PM CDTSevere Thunderstorm WarningMPXBrown, Nicollet31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994Every severe thunderstorm warning in 1994

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.