Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 172, NWS Twin Cities, MN

August 13, 1994Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 13, 1994, 2:41 AM CDT for Todd County, Minnesota. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
Aug 13, 1994, 2:41 AM CDT (07:41 UTC)
Expired
Aug 13, 1994, 3:30 AM CDT
In force
49 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Todd County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 7.7 hours before the alert went out and 169 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 00:00Z on 1994-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 100 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 1994-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
100 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
577 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
31 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 130741
SVRSTC
MNC153-130830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
241 AM CDT SAT AUG 13 1994
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MINNESOTA
 
   ...NORTHERN TODD COUNTY
 
AT 230 AM RADAR SHOWED A SEVERE THUNDERSTORM ABOUT 530 MILES NORTH OF
ALEXANDRIA MOVING SOUTHEAST AT 45 MPH.
 
PERSONS IN NORTHERN TODD COUNTY ESPECIALLY IN THE CITIES OF
BERTHA...STAPLES AND CLARISSA CAN EXPECT THIS DANGEROUS STORM BY 315
AM THIS MORNING.
 
 
 
 
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  DO NOT USE THE TELEPHONE UNLESS IT IS
AN EMERGENCY.
 
 
FRASER
NNNN

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, Aug 13, 1:40 AM CDT, 1 hour 1 minute before
MNZ004>096-130800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
140 AM CDT SAT AUG 13 1994

THE SEVERE THUNDERSTORM WATCH WAS NO LONGER IN EFFECT NORTH OF A
THIEF RIVER FALLS TO INTERNATIONAL FALLS LINE.  A STRONG COLD FRONT
HAS PUSHED INTO MINNESOTA EARLY THIS MORNING.  AS THE FRONT MOVES
SOUTH AND EAST THE AIR NORTH AND WEST OF THE FRONT WILL BECOME COLD
AND STABLE AND THUNDERSTORMS WILL LONGER BE LIKELY.

A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT FOR AN AREA ROUGHLY
BOUNDED BY FERGUS FALLS...GRAND RAPIDS...INTERNATIONAL FALLS AND
THIEF RIVER FALLS.  THUNDERSTORMS WITH DAMAGING WINDS WILL CONTINUE
TO BE POSSIBLE IN THIS AREA FOR THE NEXT SEVERAL HOURS.
 SCOTT
Special weather statement, Aug 13, 1:43 AM CDT, 58 minutes before
MNZ004>096-130800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
140 AM CDT SAT AUG 13 1994

THE SEVERE THUNDERSTORM WATCH WAS NO LONGER IN EFFECT NORTH OF A
THIEF RIVER FALLS TO INTERNATIONAL FALLS LINE.  A STRONG COLD FRONT
HAS PUSHED INTO MINNESOTA EARLY THIS MORNING.  AS THE FRONT MOVES
SOUTH AND EAST THE AIR NORTH AND WEST OF THE FRONT WILL BECOME COLD
AND STABLE AND THUNDERSTORMS WILL LONGER BE LIKELY.

A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT FOR AN AREA ROUGHLY
BOUNDED BY FERGUS FALLS...GRAND RAPIDS...INTERNATIONAL FALLS AND
THIEF RIVER FALLS.  THUNDERSTORMS WITH DAMAGING WINDS WILL CONTINUE
TO BE POSSIBLE IN THIS AREA FOR THE NEXT SEVERAL HOURS.
 SCOTT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 3:15 AM CDTSevere Thunderstorm WarningMPXMorrison45 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.