Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 122, NWS Twin Cities, MN

July 6, 1994Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 6, 1994, 2:39 PM CDT for Swift County, Minnesota. It was in force for 51 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1994, 2:39 PM CDT (19:39 UTC)
Expired
Jul 6, 1994, 3:30 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Swift County, MN

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 7.7 hours before the alert went out and 218 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, Aberdeen, SD at 12:00Z on 1994-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1112 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, Aberdeen, SD at 12:00Z on 1994-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
1112 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
576 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTC 061939
SVRSTC
MNC151-062030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
239 PM CDT WED JUL 6 1994
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MINNESOTA
 
   ...EASTERN SWIFT COUNTY
 
AT 235 PM RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR BENSON IN
CENTRAL SWIFT COUNTY. THIS STORM IS MOVING TO THE EAST AT 15 MPH. SOME
CITIES IN THE PATH OF THIS STORM INCLUDE BENSON...DEGRAFF...AND SWIFT
FALLS.
 
LOCALIZED FLASH FLOODING OR PONDING OF WATER ON ROADWAYS MAY BE POSSIBLE
WITH THESE STORMS.
 
 
 
IF YOU ARE ON A LAKE...GET TO SHORE IMMEDIATELY.  IF YOU ARE IN
A VEHICLE...REMAIN INSIDE...BUT DO NOT TOUCH METAL EXPOSED TO THE
OUTSIDE.
 
 
PARKIN
 
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, Jul 6, 1:27 PM CDT, 1 hour 12 minutes before
MNZ042>044-046-048>051-054>058-064-061915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
120 PM CDT WED JUL 6 1994

...THUNDERSTORMS DEVELOPING IN WEST-CENTRAL MINNESOTA...

AT 115 PM RADAR SHOWED THUNDERSTORMS DEVELOPING IN SWIFT COUNTY OF
WEST-CENTRAL MINNESOTA.  THE THUNDERSTORMS WERE MOVING EAST AT 15
MPH.

THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAIN...FREQUENT LIGHTNING
STRIKES AND SMALL HAIL.

PERSONS IN SWIFT AND POPE COUNTIES OF WEST-CENTRAL MINNESOTA SHOULD
KEEP AN EYE TO THE SKY AND AN EAR TO THE RADIO AND LISTEN FOR
ADDITIONAL STATEMENTS.

FRASER
Special weather statement, Jul 6, 2:20 PM CDT, 19 minutes before
MNZ042>044-046-048>051-054>058-064-062015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
220 PM CDT WED JUL 6 1994

...THUNDERSTORMS IN WEST-CENTRAL MINNESOTA...

AT 215 PM RADAR SHOWED THUNDERSTORMS CONTINUING IN SWIFT COUNTY OF
WEST-CENTRAL MINNESOTA. A FEW THUNDERSTORMS HAD ALSO DEVELOPED IN
EASTERN CHIPPEWA COUNTY AND SOUTHERN POPE COUNTY. THESE STORMS
WERE MOVING TO THE EAST AT 15 MPH. SOME CITIES IN THE PATH OF THESE
STORMS INCLUDE CLARA CITY...RAYMOND...DEGRAFF...SWIFT FALLS...AND
GILCHRIST.

THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAIN...FREQUENT LIGHTNING
STRIKES AND SMALL HAIL.

PERSONS IN THE PATH OF THESE STORMS SHOULD BE AWARE OF RAPIDLY
CHANGING WEATHER CONDITIONS. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL MEDIA FOR FURTHER UPDATES.

PARKIN
Special weather statement, Jul 6, 2:21 PM CDT, 18 minutes before
MNZ042>044-046-048>051-054>058-064-062015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
220 PM CDT WED JUL 6 1994

...THUNDERSTORMS IN WEST-CENTRAL MINNESOTA...

AT 215 PM RADAR SHOWED THUNDERSTORMS CONTINUING IN SWIFT COUNTY OF
WEST-CENTRAL MINNESOTA. A FEW THUNDERSTORMS HAD ALSO DEVELOPED IN
EASTERN CHIPPEWA COUNTY AND SOUTHERN POPE COUNTY. THESE STORMS
WERE MOVING TO THE EAST AT 15 MPH. SOME CITIES IN THE PATH OF THESE
STORMS INCLUDE CLARA CITY...RAYMOND...DEGRAFF...SWIFT FALLS...AND
GILCHRIST.

THESE THUNDERSTORMS MAY PRODUCE BRIEF HEAVY RAIN...FREQUENT LIGHTNING
STRIKES AND SMALL HAIL.

PERSONS IN THE PATH OF TlHESE STORMS SHOULD BE AWARE OF RAPIDLY
CHANGING WEATHER CONDITIONS. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL MEDIA FOR FURTHER UPDATES.

PARKIN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 8:41 PM CDTSevere Thunderstorm WarningMPXSwift49 min
Jul 5, 9:13 PM CDTSevere Thunderstorm WarningMPXMorrison47 min
Jul 5, 9:37 PM CDTSevere Thunderstorm WarningMPXSwift38 min
Jul 5, 10:02 PM CDTSevere Thunderstorm WarningMPXMorrison58 min
Jul 5, 10:22 PM CDTSevere Thunderstorm WarningMPXChippewa53 min
Jul 6, 1:55 AM CDTFlash Flood WarningMPXGoodhue3 hr
Jul 6, 3:33 PM CDTSevere Thunderstorm WarningMPXSwift42 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.