Alert archive / Minnesota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 57, NWS Twin Cities, MN

July 18, 1993Chippewa County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 18, 1993, 11:01 PM CDT for Chippewa County, Minnesota. It was in force for 44 min.

The area

The counties it named.

The facts

Issued: Jul 18, 1993, 11:01 PM CDT (04:01 UTC)
Expired: Jul 18, 1993, 11:45 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Chippewa County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 4.0 hours before the alert went out and 156 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: 461 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 190410
SVRSTC
MNC023-190445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MN
ISSUED BY MINNEAPOLIS MN
1101 PM CDT SUN JUL 18 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A 
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN WEST CENTRAL MINNESOTA

   ...CHIPPEWA COUNTY
           

HIGH WINDS WITH THUNDERSTORMS HAVE BLOWN OUT WINDOWS IN HOMES AT BOYD
MINNESOTA IN LAC QUI PARLE COUNTY IN WEST MINNESOTA ABOUT 50 MILES
NORTHWEST OF REDWOOD FALLS.  TREE LIMBS REPORTELY WERE BLOWN DOWN TOO
SHORTLY BEFORE 11 PM THIS SUNDAY EVENING.
 
THE STORM IS MOVING EAST AT 30 MPH WHICH WILL TAKE IT TO MONTEVIDEO
...GRACELOCK...MAYNARD AND CLARA CITY BY 1030 PM.           


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.

WHEN SEVERE THUNDERSTORMS ARE OCCURRING...STAY INSIDE A STRONG
BUILDING.  PROTECT YOURSELF FROM DAMAGING WINDS OR HAIL BY
KEEPING AWAY FROM WINDOWS.  LISTEN TO YOUR RADIO OR TELEVISION...
BUT TURN OFF ALL OTHER ELECTRICAL APPLIANCES.  DO NOT USE THE
PHONE DURING PERIODS OF FREQUENT LIGHTNING.



&

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

Special weather statement, Jul 18, 10:49 PM CDT, 12 minutes before

MNZ013-190445-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1049 PM CDT SUN JUL 18 1993

VERY STRONG THUNDERSTORMS ARE PASSING ACROSS DAWSON...IN EAST LAC QUI
PARLE COUNTY IN WESTCENTRAL MINNESOTA...OR ABOUT 50 MILES NORTHWEST
OF REDWOOD FALLS MINNESOTA.  WIND GUSTS OF 50 MPH ARE REPORTED WITH
THESE STORMS AT 1040 PM NEAR DAWSON ALONG WITH VERY HEAVY RAINFALL.

THE STORMS MOVEMENT IS EAST AT 30 MPH WHICH WOULD CARRY IT INTO
MONTEVIDEO ABOUT 10 PM.

TAKE SHELTER IF THEATENING CONDITIONS APPROACH.  DEADLY CLOUD TO GROUND
LIGHTNING IS LIKELY WITH THIS STORM.

WET

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Special weather statement, Jul 18, 10:50 PM CDT, 11 minutes before

MNZ013-190445-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1049 PM CDT SUN JUL 18 1993

VERY STRONG THUNDERSTORMS ARE PASSING ACROSS DAWSON...IN EAST LAC QUI
PARLE COUNTY IN WESTCENTRAL MINNESOTA...OR ABOUT 50 MILES NORTHWEST
OF REDWOOD FALLS MINNESOTA.  WIND GUSTS OF 50 MPH ARE REPORTED WITH
THESE STORMS AT 1040 PM NEAR DAWSON ALONG WITH VERY HEAVY RAINFALL.

THE STORMS MOVEMENT IS EAST AT 30 MPH WHICH WOULD CARRY IT INTO
MONTEVIDEO ABOUT 10 PM.

TAKE SHELTER IF THEATENING CONDITIONS APPROACH.  DEADLY CLOUD TO GROUND
LIGHTNING IS LIKELY WITH THIS STORM.

WET

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 11:36 PM CDT	Tornado Warning	MPX	Redwood, Renville	54 min
Jul 19, 12:08 AM CDT	Tornado Warning	MPX	Redwood, Renville	52 min
Jul 19, 12:20 AM CDT	Tornado Warning	MPX	Brown	25 min
Jul 19, 12:41 AM CDT	Tornado Warning	MPX	Brown, Nicollet	34 min
Jul 19, 12:44 AM CDT	Severe Thunderstorm Warning	MPX	Sibley	46 min
Jul 19, 1:40 AM CDT	Tornado Warning	MPX	Le Sueur	20 min
Jul 19, 2:03 AM CDT	Tornado Warning	MPX	Rice	27 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1993 Every severe thunderstorm warning 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.