Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 91, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 30, 1991, 7:59 PM CDT for Chippewa County, Minnesota. It was in force for 46 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
- Jun 30, 1991, 7:59 PM CDT (00:59 UTC)
- Expired
- Jun 30, 1991, 8:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Chippewa County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 8:10 PM CDT | Thunderstorm Wind 52 | Chippewa, MN |
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 00:00Z, 1.0 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.
- Mixed-layer CAPE
- 95 J/kg
- Mixed-layer CIN
- -354 J/kg
- Mixed-layer LCL
- 659 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 390 m²/s²
- 0-3 km storm-relative helicity
- 500 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 10.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTC 010059 SVRSTC MNC023-010145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 759 PM CDT SUN JUN 30 1991 THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL MINNESOTA ...CHIPPEWA COUNTY AT 7 55 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 45 MILES WEST SOUTHWEST OF WILLMAR MINNESOTA NEAR THE LAC QUI PARLE RESERVOIR. THIS THUNDERSTORM WAS MOVING EAST AT 30 MPH. THIS STORM WILL MOVE THROUGH MONTEVIDEO...MILAN...AND WATSON BETWEEN 8 00 AND 8 15 PM CDT...AND THROUGH RURAL NORTH CENTRAL CHIPPEWA COUNTY BETWEEN 8 15 AND 8 45 PM CDT. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. 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, Jun 30, 4:34 PM CDT, 3 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 435 PMM CDT SUN JUN 30 1991 ...THUNDERSTORMS FORMING OVER FAR WESTERN TWIN CITIES METRO... AN AREA OF THUNDERSTORMS WAS FORMING RAPIDLY NEAR THE TOWN OF WACONIA IN NORTHERN CARVER COUNTY. THIS THUNDERSTORMS WAS MOVING TO THE NORTHEAST AND COULD AFFECT THE WESTERN PORTION OF LAKE MINNETONKA THROUGH 530 PM. PERSONS INVOLVED IN BOATING AND FISHING ON THE WESTERN PORTION OF LAKE MINNETONKA SHOULD SEEK SAFE HARBOR UNTIL THIS THUNDERSTORM MOVES OFF TO THE NORTHEAST. GUSTY WINDS...FREQUENT LIGHTNING STRIKES AND BRIEF HEAVY RAINS WILL BE LIKELY AS THIS THUNDERSTORM APPROACHES FROM THE SOUTHWEST. SWANBERG
Special weather statement, Jun 30, 5:40 PM CDT, 2 hours 19 minutes before
MNZ014-302345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 540 PM CDT SUN JUN 30 1991 ...THUNDERSTORMS MOVE ACROSS CENTRAL MINNESOTA... AT 537 PM CDT A STRONG THUNDERSTORM WITH BRIEF HEAVY RAIN AND POSSIBLE HAIL WAS LOCATED NEAR POPPLE CREEK...10 MILES NORTHEAST OF ST CLOUD. THE THUNDERSTORM WAS MOVING NORTHEAST AT 20 MPH AND WILL MOVE THROUGH THE TOWN OF GILMAN AT 545 PM. IF THIS STORM APPROACHES YOUR AREA PLEASE MOVE INDOORS QUICKLY. DEADLY CLOUD TO GROUND LIGHTNING WILL BE PRODUCED BY THIS STORM. NNNN
Special weather statement, Jun 30, 5:46 PM CDT, 2 hours 13 minutes before
MNZ014-016-302315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 545 PM CDT SUN JUN 30 1991 AT 540 PM...A STRONG THUNDERSTORM WAS 25 MILES NORTHWEST OF DOWNTOWN MINNEAPOLIS...FROM ROCKFORD TO ELK RIVER. SMALL HAIL...GUSTY WINDS AND FREQUENT LIGHTNING ARE ALL POSSIBLE WITH THIS STORM. LITTLE MOVEMENT WAS OBSERVED...SINCE THE STORM WAS IN THE FORMATIVE STAGES. THE STORM WAS DEVELOPING RAPIDLY. PEOPLE AROUND ROCKFORD... BUFFALO...ALBERTVILLE...AND ELK RIVER SHOULD BE READY TO GET TO SHELTER QUICKLY IF THE STORM SHOULD SUDDENLY STRENGTHEN. LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. TDK
Special weather statement, Jun 30, 6:05 PM CDT, 1 hour 54 minutes before
MNZ012-010000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 605 PM CDT SUN JUN 30 1991 ...THUNDERSTORM WAS MOVING OVER CENTRAL MINNESOTA SOUTH OF LAKE MILLE LACS... AT 605 PM CDT RADAR LOCATED A STRONG THUNDERSTORM WITH HEAVY RAIN AND SMALL HAIL 6 MILES NORTH OF MILACA...28 MILES NORTHEAST OF ST CLOUD. THE STORM WAS MOVING NORTHEAST AT 25 MPH AND WILL PASS OVER THE RUM RIVER STATE FOREST BY 615 PM. PEOPLE OUTDOORS AND CAMPERS SHOULD MOVE TO YOUR AUTOMOBILES FOR SAFETY...LIGHTNING IS DEADLY AND YOU WILL BE SAFE IN YOUR CAR. NNNN
Special weather statement, Jun 30, 7:24 PM CDT, 35 minutes before
MNZ013-010130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 724 PM CDT SUN JUN 30 1991 ...TORNADO WATCH FOR WEST CENTRAL MINNESOTA UNTIL 9 PM CDT AND A SEVERE THUNDERSTORM WATCH FOR CENTRAL MINNESOTA UNTIL MIDNIGHT... AT 7 25 PM CDT A THUNDERSTORM WITH POTENTIAL SEVERE WEATHER EXNTENDED FROM NEAR ORTONVILLE MINNESOTA SOUTH TO JUST SOUTHWEST OF CANBY MINNESOTA. THE STRONGEST OF THESE THUNDERSTORMS WAS 85 MILES SOUTHWEST OF WILLMAR MINNESOTA AND LOCATED JUST ACROSS THE MINNESOTA-SOUTH DAKOTA BORDER. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. BETWEEN 7 30 AND 8 PM CDT THESE STORMS WILL CONTINUE TO MOVE INTO WEST CENTRAL MINNESOTA. SOME TOWNS IN THE PATH OF THESE THUNDERSTORMS ARE ORTONVILLE...CANBY...MARIETTA...DAWSON...MADISON AND ST. LE0. PEOPLE IN THESES TOWNS AND THE RURAL WESTERN SECTIONS OF BIG STONE... LAC QUI PARLE AND YELLOW MEDICINE COUNTIES SHOULD BE ALERT FOR THREATENING WEATHER.e BE READY TO GO TO INSIDE SHELTER IMMEDIATELY IF THESE THUNDERSTORMS APPROACH YOUR AREA. THESE THUNDERSTORMS WILL HAVE VERY HEAVY RAIN...POSSIBLE DAMAGING WINDS...LARGE HAIL...AND DEADLY LIGHTNING. NNNN
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 7:44 PM CDT | Tornado Warning | MPX | Lac qui Parle | 31 min |
| Jun 30, 9:45 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi | 36 min |
| Jun 30, 11:08 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Wright | 37 min |
| Jul 1, 12:05 AM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 40 min |
| Jul 1, 12:05 AM CDT | Severe Thunderstorm Warning | MPX | Ramsey | 40 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1991Every severe thunderstorm warning in 1991
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.