Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 89, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 30, 1991, 6:15 PM CDT for Anoka County, Hennepin County, Wright County, Minnesota. It was in force for 60 min. 2 reports 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, 6:15 PM CDT (23:15 UTC)
- Expired
- Jun 30, 1991, 7:15 PM CDT
- In force
- 60 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Anoka County, MN, Hennepin County, MN, Wright County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 6:43 PM CDT | Thunderstorm Wind 0 | Hennepin, MN | |
| Jun 30, 6:50 PM CDT | Thunderstorm Wind 0 | Anoka, 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 12:00Z, 11.3 hours before the alert went out and 34 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1153 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 302315 SVRMSP MNC171-003-053-010015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 615 PM CDT SUN JUN 30 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MINNESOTA ...NORTHEASTERN WRIGHT COUNTY IN EAST CENTRAL MINNESOTA ...NORTHWESTERN ANOKA COUNTY...NORTHWESTERN HENNEPIN COUNTY AT 610 PM...RADAR INDICATED A DEVELOPING SEVERE THUNDERSTORM 5 MILES WEST OF ROGERS...OR ABOUT 25 MILES NORTHWEST OF DOWNTOWN MINNEAPOLIS. LARGE HAIL IS EXPECTED...POSSIBLY GOLFBALL OR BASEBALL SIZE. THE STORM WAS MOVING NORTHEAST AT ONLY 20 MILES AN HOUR... AND WILL AFFECT THE CITIES OF ST MICHAEL...ALBERTVILLE... DAYTON...ROGERS...ST FRANCIS...AND BETHEL. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. TDK
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, 1 hour 41 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, 35 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, 29 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, 10 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
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 6:50 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Ramsey | 55 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.