Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 2, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 7, 1991, 8:21 PM CDT for Pierce County, Saint Croix County, Wisconsin. It was in force for 54 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
- Apr 7, 1991, 8:21 PM CDT (01:21 UTC)
- Expired
- Apr 7, 1991, 9:15 PM CDT
- In force
- 54 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Pierce County, WI, Saint Croix County, WI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 7, 9:10 PM CDT | Hail 1.75 | St. Croix, WI |
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, 1.4 hours before the alert went out and 92 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
- 2856 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 219 m²/s²
- 0-3 km storm-relative helicity
- 660 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 080123 SVRMSP WIC093-109-080215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 821 PM CDT SUN APR 7 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL WISCONSIN ...NORTHEASTERN PIERCE COUNTY...EASTERN ST CROIX COUNTY AT 815 PM CST...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES WEST OF BALDWIN WISCONSIN...OR ABOUT...38 MILES WEST NORTHWEST OF EAU CLAIRE WISCONSIN. THE SEVERE THUNDERSTORM WAS MOVING TOWARD THE EAST AT 25 MPH. THE PROJECTED PATH OF THIS STORM SHOULD TAKE IT NEAR OR THROUGH THE CITIES OF BALDWIN...WOODVILLE...GLENWOOD CITY...AND SPRING VALLEY BY 9 PM CDT. NAISTAT
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, Apr 7, 6:22 PM CDT, 1 hour 59 minutes before
WIZ006-072355- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 620 PM CDT SUN APR 7 1991 ...STRONG THUNDERSTORMS CONTINUE OVER WEST CENTRAL WISCONSIN... AT 615 PM CDT...A BAND OF STRONG THUNDERSTORMS WERE LOCATED FROM EASTERN ST CROIX ACROSS EXTREME NORTHWEST DUNN AND INTO SOUTHERN BARRON COUNTY IN WEST CENTRAL WISCONSIN. THE STRONGEST STORMS WERE LOCATED NEAR NEAR CHETEK..GLENWOOD CITY AND NEAR RIVER FALLS. THE THUNDERSTORMS COULD PROUDCE PERIODS OF VERY HEAVY RAIN ALONG WITH SOME SMALL HAIL AS THEY MOVE NORTHEAST AT 25 MILES AN HOUR. THE ATMOSPHERE IS MOST UNSTABLE. PERIODS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE FOR THE NEXT SEVERAL HOURS OVER PORTIONS% OF WEST CENTRAL WISCONSIN. SES
Special weather statement, Apr 7, 6:49 PM CDT, 1 hour 32 minutes before
MNZ016-WIZ006-080030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 645 PM CDT SUN APR 7 1991 ...THUNDERSTORMS DEVELOPING OVER EAST CENTRAL MINNESOTA... AT 635 PM CDT...A BAND OF STRONG THUNDERSTORMS CONTINUED OVER WEST CENTRAL WISCONSIN AND WERE NOW DEVLOPING BACK INTO EAST CENTRAL MINNESOTA. THE NEW AREA OF THUNDERSTORMS WERE LOCATED OVER NORTHERN DAKOTA COUNTY JUST SOUTHEAST OF DOWNTOWN MINNEAPOLIS. THE MAIN AREA OF THUNDERSTORMS EXTENDED FROM JUST SOUTH OF RICE LAKE NEAR CHETEK TO RIDGELAND AND FROM BALDWIN TO NEAR RIVER FALLS. SOME OF THE STORMS COULD PROUDCE PERIODS OF VERY HEAVY RAIN ALONG WITH SOME SMALL HAIL AS THEY MOVE NORTHEAST AT 25 MILES AN HOURS. THE ATMOSPHERE IS MOST UNSTABLE. PERIODS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE FOR THE NEXT SEVERAL HOURS OVER PORTIONS OF EAST CENTRAL MINNESOTA INTO WEST CENTRAL WISCONSIN. SES
Special weather statement, Apr 7, 7:55 PM CDT, 26 minutes before
MNZ016-WIZ006-080130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 750 PM CDT SUN APR 7 1991 ...STRONG THUNDERSTORMS CONTINUING OF WEST CENTRAL WISCONSIN... AT 735 PM CDT...A BAND OF STRONG THUNDERSTORMS WERE LOCATED FROM EXTREME EAST CENTRAL MINNESOTA INTO WEST CENTRAL WISCONSIN. THE STRONGEST STORMS EXTENDED FROM SOUTHERN POLK COUNTY NEAR AMERY DOWN THROUGH ST CROIX COUNTY THROUGH NEW RICHMOND TO NEAR BALDWIN. MOVEMENT WAS NORTHEAST AT 25 MILES AN HOUR. PUBLIC REPORTS OF HAIL ALONG WITH VERY HEAVY RAINS AND WIND GUSTS TO 45 MPH HAVE BEEN RECEIVED IN ASSOCIATION WITH THESE STORMS. THE ATMOSPHERE IS MOST UNSTABLE. PERIODS OF SHOWERS AND THUNDERSTORMS WILL CONTINUE FOR THE NEXT SEVERAL HOURS OVER PORTIONS OF EAST CENTRAL MINNESOTA INTO WEST CENTRAL WISCONSIN. SES
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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.