Alert archive / Minnesota / Tornado Warnings in 1991

Tornado Warning 4, NWS Twin Cities, MN

May 30, 1991Sherburne County, Stearns County, Minnesota

NWS Twin Cities, MN issued this tornado warning at May 30, 1991, 3:50 PM CDT for Sherburne County, Stearns County, Minnesota. It was in force for 25 min. 4 reports 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: May 30, 1991, 3:50 PM CDT (20:50 UTC)
Expired: May 30, 1991, 4:15 PM CDT
In force: 25 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Sherburne County, MN, Stearns County, MN

What was reported inside it

Time	Report	Where
May 30, 4:00 PM CDT	Tornado F0	Stearns, MN
May 30, 4:06 PM CDT	Tornado F0	Sherburne, MN
May 30, 4:09 PM CDT	Tornado F0	Stearns, MN
May 30, 4:21 PM CDT	Tornado F0	Sherburne, MN

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 12:00Z, 8.8 hours before the alert went out and 86 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: 54 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1164 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 51 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 
TTAA00 KSTC 302054 COR
TORSTC
MNC141-145-302115-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA...CORR FOR SPELLING
350 PM CDT THU MAY 30 1991

THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA   HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN CENTRAL MINNESOTA

   ...WESTERN SHERBURNE COUNTY...EXTREME SOUTHEASTERN STEARNS COUNTY

INCLUDING THE CITIES OF ST AUGUSTA...CLEAR WATER...AND CLEAR LAKE..

SINCE 345 PM CDT NUMEROUS FUNNEL CLOUDS IN THE VICINITY OF
ST. AUGUSTA AND LUXENBURG SOUTH OF ST CLOUD HAVE BEEN REPORTED
BY THE LAW ENFORCEMENT DEPUTIES.


IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

N-NNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 2:50 PM CDT	Tornado Warning	MPX	Meeker, Stearns	25 min
May 30, 3:18 PM CDT	Tornado Warning	MPX	Hennepin	27 min
May 30, 4:15 PM CDT	Tornado Warning	MPX	Sherburne	30 min
May 30, 4:25 PM CDT	Severe Thunderstorm Warning	MPX	Washington	35 min

Nearby

Tornado Warnings in Minnesota, 1991 Every tornado warning in 1991 Tornadoes in 1991

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.