Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 128, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 29, 1987, 9:25 PM CDT for Polk County, Wisconsin. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1987, 9:25 PM CDT (02:25 UTC)
- Expired
- Aug 29, 1987, 10:00 PM CDT
- In force
- 35 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Polk County, WI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 2.4 hours before the alert went out and 113 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
- 1569 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 341 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 12.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 300225 SVRMSP WIC095-300300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 925 PM CDT SAT AUG 29 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL WISCONSIN... NORTH AND CENTRAL POLK AT...920 PM CDT A SEVERE THUNDERSTORM WAS LOCATED 35 MILES NORTHEAST OF DOWTOWN ST PAUL IN EAST CENTRAL MINNESOTA JUST WEST OF ST CROIX FALLS. THE STORM WAS MOVING RAPIDLY EAST AT 55 MILES AN HOUR. SOME CITIES IN THE PATH OF THIS STORM INCLUDE BALSAM LAKE... LUCK AND CUSHING. REMEMBER SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH..DESTRUCTIVE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN. ALSO SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE I]S SPOTTED. MILLER
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, Aug 29, 7:53 PM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 750 PM CDT SAT AUG 29 1987 AT 750 PM...ISOLATED THUNDERSTORMS WITH HEAVY RAIN WERE OCCURRING NEAR LITCHFIELD IN SOUTHERN MCLEOD COUNTY OF CENTRAL MINNESOTA... AND NEAR PRINCETON IN SOUTHERN MILLE LACS COUNTY OF EAST CENTRAL MINNESOTA. ALTHOUGH NO REPORTS OF SEVERE WEATHER HAD BEEN RECIEVED ...THE RAPID DEVELOPMENT OF THESE THUNDERSTORMS SUGGESTS THAT THEY MAY HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS. MARBLE SIZE HAIL WAS REPORTED AT PRINCETON AT ABOUT 750 PM. MOVEMENT WAS TO THE EAST AT 30 TO 35 MILES AN HOUR. THESE THUNDERSTORMS WILL BE MOVING ACROSS ISANTI AND WRIGHT COUNTIES OF CENTRAL AND EAST CENTRAL MINNESOTA BETWEEN 750 PM AND 830 PM. IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER AND IF POSSIBLE RELAY REPORTS OF THE WEATHER TO LAW ENFORCEMENT OFFICIALS. KRAFT
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1987Every severe thunderstorm warning in 1987
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.