Alert archive / Minnesota / Tornado Warnings in 1994

Tornado Warning 21, NWS Twin Cities, MN

June 30, 1994Blue Earth County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 30, 1994, 8:51 PM CDT for Blue Earth County, Nicollet County, Minnesota. It was in force for 54 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 30, 1994, 8:51 PM CDT (01:51 UTC)
Expired: Jun 30, 1994, 9:45 PM CDT
In force: 54 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Blue Earth County, MN, Nicollet County, MN

What was reported inside it

Time	Report	Where	Remark
Jun 30, 9:13 PM CDT	Tornado F1	St. Clair, MN	A tornado touchdown on a farmstead destroyed a 45 foot barn, numerous farm implements, and twisted trees to the ground. One woman on the farm was injured by flying debris.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 1.9 hours before the alert went out and 85 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: 2237 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 266 m²/s²
0-3 km storm-relative helicity: 383 m²/s²
Significant tornado parameter: 4.4
Supercell composite: 12.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 010153
TORRST
MNC013-103-010245-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
851 PM CDT THU JUN 30 1994
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  945 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...NORTHERN BLUE EARTH COUNTY...SOUTHERN NICOLLET COUNTY
 
...AT 840PM...CITY OFFICIALS REPORTED A POSSIBLE TORNADO NEAR THE TOWN
OF MANKATO AND WAS MOVING TO THE EAST AND SOUTHEAST AT 25 TO 30 MPH.
THIS IS A DANGEROUS STORM SO ACT QUICKLY AND GET TO A BASEMENT OR
SHELTER IMMEDIATELY.
 
REMEMBER A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11PM FOR
PORTIONS OF SOUTH CENTRAL MINNESOTA.
 
THIS IS A DANGEROUS SITUATION.  ACT QUICKLY.  IF YOU ARE IN THE
PATH OF THIS TORNADO MOVE TO A BASEMENT AND GET UNDER SOME STURDY
FURNITURE OR A WORKBENCH.  IF NO BASEMENT IS AVAILABLE...GO TO A
SMALL INTERIOR ROOM ON THE LOWEST FLOOR.  AVOID WINDOWS.  ABANDON
CARS AND MOBILE HOMES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 7:01 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Sibley	59 min
Jun 30, 7:13 PM CDT	Tornado Warning	MPX	Carver, McLeod	32 min
Jun 30, 7:22 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	68 min
Jun 30, 7:42 PM CDT	Tornado Warning	MPX	Carver	33 min
Jun 30, 7:47 PM CDT	Tornado Warning	MPX	Sibley	28 min
Jun 30, 7:54 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet	51 min
Jun 30, 8:13 PM CDT	Tornado Warning	MPX	Scott	32 min
Jun 30, 8:21 PM CDT	Severe Thunderstorm Warning	MPX	Sibley	39 min
Jun 30, 8:22 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet	68 min
Jun 30, 8:32 PM CDT	Tornado Warning	MPX	Le Sueur, Nicollet	28 min
Jun 30, 8:42 PM CDT	Severe Thunderstorm Warning	MPX	Brown	48 min
Jun 30, 8:49 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	21 min
Jun 30, 9:41 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	49 min
Jun 30, 9:41 PM CDT	Severe Thunderstorm Warning	MPX	Watonwan	49 min
Jun 30, 10:19 PM CDT	Tornado Warning	MPX	Freeborn	26 min
Jun 30, 10:52 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	38 min

Nearby

Tornado Warnings in Minnesota, 1994 Every tornado warning in 1994 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.