Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 170, NWS Twin Cities, MN

August 7, 1994Brown County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 7, 1994, 6:44 PM CDT for Brown County, Nicollet County, Minnesota. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 7, 1994, 6:44 PM CDT (23:44 UTC)
Expired: Aug 7, 1994, 7:15 PM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Brown County, MN, Nicollet County, MN

What was reported inside it

Time	Report	Where	Remark
Aug 7, 7:24 PM CDT	Tornado F0	Courtland, MN	A tornado briefly touched down in an open farm field and damaged 5 ,acres of corn, about 1 mile east of Courtland. ,

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.7 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1220 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 171 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 072342 RRA
SVRRST
MNC015-103-080015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
644 PM CDT SUN AUG 7 1994
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...NORTHERN BROWN COUNTY...NICOLLET COUNTY
 
AT 636PM RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTH OF ST
GEORGE OR 32 MILES NORTHWEST OF NEW ULM. THIS STORM WAS MOVING SOUTH
AT 20 MPH AND WILL MOVE THROUGH NEW ULM BEWTEEN 705 AND 715 PM.
 
 
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

Local storm report, Aug 7, 5:30 PM CDT, 1 hour 14 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
530 PM CDT AUG 7 1994

TIME          EVENT

430 PM        3/4 INCH  HAIL AT SULLIVAN LAKE RESORT IN MORRISON
              COUNTY...25 MILES NORTHEAST OF LITTLE FALLS.

520 PM        GOLF BALL SIZE HAIL (13/4 INCH) HAIL AT WOOD LAKE
              IN YELLOW MEDICINE COUNTY...10 MILES SOUTH OF GRANITE
              FALLS.

FRASER

Special weather statement, Aug 7, 6:08 PM CDT, 36 minutes before

MNZ041-042-046>048-072345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
608 PM CDT SUN AUG 7 1994

...PORTION OF WEST CENTRAL MINNESOTA CLEARED FROM SEVERE THUNDERSTORM
WATCH...

A PORTION OF WEST CENTRAL MINNESOTA HAS BEEN CLEARED FROM THE SEVERE
THUNDERSTORM WATCH ISSUED ABOUT 330 PM THIS AFTERNOON.  THE COUNTIES
CLEARED FROM THE WATCH ARE TODD...DOUGLAS...POPE...STEVENS...AND BIG
STONE.

THE REMAINDER OF CENTRAL MINNESOTA INCLUDING THE TWIN CITIES ARE
STILL UNDER A SEVERE THUNDERSTORM WATCH UNTIL 10 PM.  ALL OF
SOUTHERN MINNESOTA INCLUDING ROCHESTER IS UNDER A SEVERE
THUNDERSTORM WATCH UNTIL 1 AM.

KAVINSKY

Special weather statement, Aug 7, 6:10 PM CDT, 34 minutes before

MNZ041-042-046>048-072345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
608 PM CDT SUN AUG 7 1994

...PORTION OF WEST CENTRAL MINNESOTA CLEARED FROM SEVERE THUNDERSTORM
WATCH...

A PORTION OF WEST CENTRAL MINNESOTA HAS BEEN CLEARED FROM THE SEVERE
THUNDERSTORM WATCH ISSUED ABOUT 330 PM THIS AFTERNOON.  THE COUNTIES
CLEARED FROM THE WATCH ARE TODD...DOUGLAS...POPE...STEVENS...AND BIG
STONE.

THE REMAINDER OF CENTRAL MINNESOTA INCLUDING THE TWIN CITIES ARE
STILL UNDER A SEVERE THUNDERSTORM WATCH UNTIL 10 PM.  ALL OF
SOUTHERN MINNESOTA INCLUDING ROCHESTER IS UNDER A SEVERE
THUNDERSTORM WATCH UNTIL 1 AM.

KAVINSKY

Local storm report, Aug 7, 6:18 PM CDT, 26 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
620 PM CDT AUG 7 1994

TIME          EVENT

430 PM        3/4 INCH  HAIL AT SULLIVAN LAKE RESORT IN MORRISON
              COUNTY...25 MILES NORTHEAST OF LITTLE FALLS.

520 PM        GOLF BALL SIZE HAIL (13/4 INCH) HAIL AT WOOD LAKE
              IN YELLOW MEDICINE COUNTY...10 MILES SOUTH OF GRANITE
              FALLS.

538 PM        BRIEF TORNADO TOUCHDOWN SOUTH OF BLOMKEST ON THE
              KANDIYOHI/RENVILLE COUNTIES BORDER...15 MILES SOUTH OF
              WILLMAR.

MCBEATH PETERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 4:44 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	61 min
Aug 7, 5:12 PM CDT	Severe Thunderstorm Warning	MPX	Meeker	63 min
Aug 7, 5:17 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	43 min
Aug 7, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	48 min
Aug 7, 5:40 PM CDT	Tornado Warning	MPX	Kandiyohi	35 min
Aug 7, 5:47 PM CDT	Tornado Warning	MPX	Renville	28 min
Aug 7, 6:22 PM CDT	Severe Thunderstorm Warning	MPX	Renville	38 min
Aug 7, 6:35 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	25 min
Aug 7, 6:54 PM CDT	Severe Thunderstorm Warning	MPX	Scott, Sibley	36 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.