Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 203, NWS Twin Cities, MN

September 21, 1994Blue Earth County, Martin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 21, 1994, 3:19 PM CDT for Blue Earth County, Martin County, Minnesota. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Sep 21, 1994, 3:19 PM CDT (20:19 UTC)
Expired
Sep 21, 1994, 4:00 PM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Blue Earth County, MN, Martin County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 8.3 hours before the alert went out and 124 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 12:00Z on 1994-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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 12:00Z on 1994-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
49 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
93 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 KRST 212019 RRA
SVRRST
MNC013-091-212100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
319 PM CDT WED SEP 21 1994
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  400 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...BLUE EARTH COUNTY...NORTHERN MARTIN COUNTY
 
THIS WARNING INCLUDES THE TOWNS OF TRUMAN...AMBOY...AND VERNON CENTER.
 
AT 315PM RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES NORTH OF
FAIRMONT NEAR TRUMAN.  MARTIN COUNTY SHERIFF REPORTED GOLFBALL SIZE WITH
THIS STORM AT TRUMAN.
 
THE SEVERE THUNDERSTORM SHOULD BE NEAR AMBOY AND VERNON CENTER BY 330PM.
GO TO AN INTERIOR ROOM.  STAY AWAY FROM WINDOWS.
 
 
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.
 
 
 
&

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, Sep 21, 2:10 PM CDT, 1 hour 9 minutes before
MNZ042>044-046-048>051-054>058-064-212000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
210 PM CDT WED SEP 21 1994

...SEVERE THUNDERSTORM WATCH SOUTHEAST MINNESOTA INCLUDING SHERBURNE
   COUNTY UNTIL 8 PM...

AT 205 PM RADAR SHOWED TWO LINES OF SHOUERS AND THUNDERSTORMS IN
MINNESOTA.

THE FIRST LINE WITH MOSTLY SHOWERS EXTENDED FROM JUST WEST OF LITTLE
FALLS TO LITCHFIELD AND WAS MOVING EAST AT 30 MPH.  BY 3 PM THESE
SHOWERS ARE EXPECTED IN THE ST CLOUD AREA.

A SECOND LINE EXTENDED FROM PRINCETON SOUTHWEST TO NEAR BIG LAKE WITH
A STRONG THUNDERSTORM LOCATED JUST NORTH OF BIG LAKE.  THESE STORMS
ARE CAPABLE OF PRODUCING BRIEF HEAVY RAIN...FREQUENT LIGHTNING
STRIKES...HAIL AND WIND GUSTS TO 50 MPH.

PERSONS IN SOUTHERN SHERBURNE COUNTY SHOULD REMAIN ALERT TO RAPIDLY
CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER STATEMENTS OR
POSSIBLE WARNINGS.

FRASER
Special weather statement, Sep 21, 2:15 PM CDT, 1 hour 4 minutes before
MNZ052-053-059>063-065>070-073-WIZ014>016-023-028-210345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
215 PM CDT WED SEP 21 1994

...STRONG THUNDERSTORMS FIRING OVER CENTRAL MINNESOTA...

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR A PORTION OF EASTERN
MINNESOTA...AND WEST CENTRAL WISCONSIN. THIS WATCH INCLUDES THE TWIN
CITIES.

AT 215 PM CDT THUNDERSTORMS EXTENDED FROM ABOUT 50 MILES NORTH OF
MINNEAPOLIS/ST PAUL TO ABOUT MONTICELLO...TO THE NORTHWEST OF THE
TWIN CITIES. THUNDERSTORMS WERE INCREASING IN COVERAGE AND INTENSITY
AND WILL MOVE EAST AT 30 MILES AN HOUR.

PERSONS THE TWIN CITIES METRO AREA AND ON EAST INTO WESTERN WISCONSIN
SHOULD BE PREPARED TO MOVE TO SAFE SHELTER QUICKLY IF THREATENING
CONDITIONS ARE SIGHTED.
EDWARDS

WWUS32KOMA.
Special weather statement, Sep 21, 2:16 PM CDT, 1 hour 3 minutes before
MNZ052-053-059>063-065>070-073-WIZ014>016-023-028-210345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
215 PM CDT WED SEP 21 1994

...STRONG THUNDERSTORMS FIRING OVER CENTRAL MINNESOTA...

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR A PORTION OF EASTERN
MINNESOTA...AND WEST CENTRAL WISCONSIN. THIS WATCH INCLUDES THE TWIN
CITIES.

AT 215 PM CDT THUNDERSTORMS EXTENDED FROM ABOUT 50 MILES NORTH OF
MINNEAPOLIS/ST PAUL TO ABOUT MONTICELLO...TO THE NORTHWEST OF THE
TWIN CITIES. THUNDERSTORMS WERE INCREASING IN COVERAGE AND INTENSITY
AND WILL MOVE EAST AT 30 MILES AN HOUR.

PERSONS THE TWIN CITIES METRO AREA AND ON EAST INTO WESTERN WISCONSIN
SHOULD BE PREPARED TO MOVE TO SAFE SHELTER QUICKLY IF THREATENING
CONDITIONS ARE SIGHTED.
EDWARDS
Special weather statement, Sep 21, 2:42 PM CDT, 37 minutes before
MNZ052-053-059-060-061-062-063-066-067-068-069-070-WIZ014-023-024-212045
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
242 PM CDT WED SEP 21 1994

AT 235 PM CDT STRONG THUNDERSTORMS WERE MOVING TOWARDS THE NORTHERN
METRO AREA OF THE TWIN CITIES. STORMS CAPABLE OF PRODUCING WINDS TO 40
MPH AND PEA SIZE HAIL WILL BE MOVING ACROSS SOUTHERN ISANTI AND NORTHERN
ANOKA COUNTIES...ABOUT 35 MILES TO THE NORTH AND NORTHWEST OF THE TWIN
CITIES.

SOME CITIES IN THE PATH OF THESE STORMS INCLUDE...ST. FRANCIS...BETHEL
AND ISANTI.

REMEMBER A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF
EASTERN MINNESOTA AND WEST CENTRAL WISCONSIN.  THIS WATCH DOES INCLUDE
ALL OF THE TWIN CITIES METRO AREA AND NEIGHBORING COUNTIES IN WEST
CENTRAL WISCONSIN.

STRONG TO SEVERE THUNDERSTORMS WILL BE MOVING ACROSS THE GREATER TWIN
CITIES METRO AREA BETWEEN 315 AND 500 PM CDT.

OTHER STRONG THUNDERSTORMS WERE APPROACHING DULUTH.
EDWARDS
Special weather statement, Sep 21, 2:45 PM CDT, 34 minutes before
MNZ052-053-059-060-061-062-063-066-067-068-069-070-WIZ014-023-024-212045
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
242 PM CDT WED SEP 21 1994

AT 235 PM CDT STRONG THUNDERSTORMS WERE MOVING TOWARDS THE NORTHERN
METRO AREA OF THE TWIN CITIES. STORMS CAPABLE OF PRODUCING WINDS TO 40
MPH AND PEA SIZE HAIL WILL BE MOVING ACROSS SOUTHERN ISANTI AND NORTHERN
ANOKA COUNTIES...ABOUT 35 MILES TO THE NORTH AND NORTHWEST OF THE TWIN
CITIES.

SOME CITIES IN THE PATH OF THESE STORMS INCLUDE...ST. FRANCIS...BETHEL
AND ISANTI.

REMEMBER A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF
EASTERN MINNESOTA AND WEST CENTRAL WISCONSIN.  THIS WATCH DOES INCLUDE
ALL OF THE TWIN CITIES METRO AREA AND NEIGHBORING COUNTIES IN WEST
CENTRAL WISCONSIN.

STRONG TO SEVERE THUNDERSTORMS WILL BE MOVING ACROSS THE GREATER TWIN
CITIES METRO AREA BETWEEN 315 AND 500 PM CDT.

OTHER STRONG THUNDERSTORMS WERE APPROACHING DULUTH.
E&DWARDS
Special weather statement, Sep 21, 3:06 PM CDT, 13 minutes before
MNZ042>044-046-048>051-054>058-064-212045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
405 PM CDT WED SEP 21 1994

...SEVERE THUNDERSTORM WATCH FOR SHERBURNE COUNTY UNTIL 8 PM...

AT 355 PM...THE LINE OF STRONG THUNDERSTORMS HAD MOVED EAST OF
SHERBURNE COUNTY. NO SEVERE WEATHER HAD BEEN REPORTED FROM THIS
STORM.

ELSEWHERE ACROSS CENTRAL MINNESOTA...SCATTERED AREAS OF MOSTLY
LIGHT RAIN WITH AN ISOLATED THUNDERSTORM CONTINUED TO MOVE EAST AT
30 MPH. THE LEADING EDGE OF THESE SHOWERS EXTENDED FROM PIERZ TO ST
CLOUD TO LITCHFIELD.

PERSONS IN CENTRAL MINNESOTA...ESPECIALLY IN SOUTHERN SHERBURNE
COUNTY...SHOULD REMAIN ALERT FOR RAPIDLY CHANGIN WEATHER CONDITIONS
AND STAY TUNED FOR FURTHER UPDATES.

HAMEN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 4:00 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault60 min
Sep 21, 4:12 PM CDTTornado WarningMPXAnoka, Ramsey48 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.