Alert archive / Minnesota / Tornado Warnings in 1993

Tornado Warning 1, NWS Grand Forks, ND

June 21, 1993Clearwater County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 21, 1993, 8:20 PM CDT for Clearwater County, Minnesota. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1993, 8:20 PM CDT (01:20 UTC)
Expired
Jun 21, 1993, 8:45 PM CDT
In force
25 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Clearwater County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.3 hours before the alert went out and 190 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, International Fa, MN at 00:00Z on 1993-06-22Temperature 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, International Fa, MN at 00:00Z on 1993-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.1939Sfc1 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
2564 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
96 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 KINL 220120
TORINL
MNC029-220145-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
820 PM CDT MON JUN 21 1993
 
THE NATIONAL WEATHER SERVICE IN INTERNATIONAL FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  845 PM CDT
FOR PERSONS IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MINNESOTA
 
   ...CLEARWATER COUNTY
 
AT 816 PM CDT THE PUBLIC REPORTED A POSSIBLE TORNADO ON THE GROUND
4 MILES SOUTH OF BAGLEY WHICH IS 26 MILES WEST OF BEMIDJI. DUE TO
THE RECENT DEVELOPMENT OF THIS STORM NO MOVEMENT HAD BEEN DETECTED.
PERSONS IN THE TOWNS OF BAGLEY AND SHEVLIN SHOULD TAKE COVER
IMMEDIATLY.
 
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.
 
DUKESHERER
 
NNNN

What forecasters said that day

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

In the hours before

Special weather statement, Jun 21, 5:33 PM CDT, 2 hours 47 minutes before
NDZ016-017-018-MNZ001-006-010-212345-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
533 PM CDT MON JUN 21 1993

 ...INTENSE THUNDERSTORMS DEVELOP OVER EAST CENTRAL NORTH DAKOTA...

AT 530 PM CDT A SMALL AREA OF THUNDERSTORMS...SOME OF THEM INTENSE...
HAD DEVELOPED OVER EAST CENTRAL NORTH DAKOTA BETWEEN FARGO AND GRAND
FORKS.  THE STRONGEST THUNDERSTORMS WERE 35 TO 45 MILES NORTH-
NORTHWEST OF FARGO IN THE HOPE/COLGATE/PAGE AREAS.

THESE THUNDERSTORMS WERE DRIFTING SOUTH AROUND 5 MILES AN HOUR.

ATMOSPHERIC CONDITIONS SUGGEST THESE STORMS WILL CONTINUE QUITE STRONG
INTO THE EVENING HOURS.  LOCALLY TORRENTIAL RAINS...HAIL...AS WELL AS
DEADLY LIGHTNING AND BRIEF WIND GUSTS TO NEAR 50 MILES AN HOUR ARE
POSSIBLE WITH THE STRONGER STORMS.  THIS AREA OF STORMS SHOULD CONTINUE
TO DRIFT SOUTHWARD AND AFFECT THE PAGE/PILLSBURY/HUNTER AND ARTHUR AREAS
THROUGH 630 PM CDT.
EWENS
Special weather statement, Jun 21, 6:33 PM CDT, 1 hour 47 minutes before
NDZ016-017-018-MNZ001-006-010-220045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
633 PM CDT MON JUN 21 1993

...ISOLATED INTENSE THUNDERSTORMS OVER EAST CENTRAL NORTH DAKOTA...

AT 630 PM CDT A SMALL AREA OF THUNDERSTORMS...SOME OF THEM INTENSE...
CONTINUED OVER EAST CENTRAL NORTH DAKOTA BETWEEN FARGO AND DEVILS
LAKE.  THE STRONGEST THUNDERSTORMS WERE 35 MILES NORTHEAST OF JAMESTOWN
IN THE COOPERSTOWN AREA.

THESE THUNDERSTORMS WERE STATIONARY.

ATMOSPHERIC CONDITIONS SUGGEST THESE STORMS WILL CONTINUE QUITE STRONG
INTO THE EVENING HOURS.  LOCALIZED TORRENTIAL RAINS...HAIL...AS WELL AS
DEADLY LIGHTNING AND BRIEF WIND GUSTS TO NEAR 50 MILES AN HOUR ARE
POSSIBLE WITH THE STRONGER STORMS.  THUNDERSTORMS ARE EXPECTED TO
DEVELOP RAPIDLY AND DISSIPATE QUICKLY...WITH THE GREATEST LIKELIHOOD OF
STORMS ALONG AND JUST SOUTH OF NORTH DAKOTA STATE HIWAY 200 BETWEEN
CARRIGNTON AND HILLSBORO.  A FEW THUNDERSTORVMS ARE POSSIBLE ON THE
MINNESOTA SIDE OF THE RIVER THIS EVENING ALSO.
EWENS

Nearby

Tornado Warnings in Minnesota, 1993Every tornado warning in 1993Tornadoes in 1993

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.