Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 73, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 1987, 3:31 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 59 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
- Jul 23, 1987, 3:31 PM CDT (20:31 UTC)
- Expired
- Jul 23, 1987, 4:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Chippewa County, WI, Eau Claire County, WI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 3:45 PM CDT | Thunderstorm Wind 0 | Chippewa, WI | |
| Jul 23, 4:15 PM CDT | Thunderstorm Wind 0 | Chippewa, 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 12:00Z, 8.5 hours before the alert went out and 183 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
- 575 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 232031 SVRMSP WIC017-035-232130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 331 PM CDT THU JUL 23 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF WEST CENTRAL WISCONSIN... CHIPPEWA AND EAU CLAIRE AT 327 PM CDT MINNEAPOLIS WEATHER RADAR INDICATED A SEVERE THUNDERSTORM JUST EAST OF WHEELER IN EXTREME EASTERN DUNN COUNTY OF WEST CENTRAL WISCONSIN...OR ABOUT 20 MILES NORTHWEST OF EAU CLAIRE. THE SEVERE THUNDERSTORM WAS MOVING TOWARD THE EAST SOUTHEAST AT 35 MPH. THE THUNDERSTORMS PROJECTED TRACK WILL CARRY IT NEAR OR THROUGH THE CITIES OF EAU CLAIRE...COLFAX...CHIPPEWA FALLS...AND BLOOMER BY 430 PM CDT. REMEMBER SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH..DESTRUCTIVE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN. ALSO SEVERE THUNDERSTORMS CAN AND OCCASIONtALLY 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 IS SPOTTED. NAISTAT
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 2:08 PM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 52 min |
| Jul 23, 2:30 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 30 min |
| Jul 23, 2:57 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn, Rusk | 43 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.