Alert archive / Wisconsin / Tornado Warnings in 1987
Tornado Warning 13, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Jul 6, 1987, 4:12 PM CDT for Saint Croix County, Wisconsin. It was in force for 33 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
- Jul 6, 1987, 4:12 PM CDT (21:12 UTC)
- Expired
- Jul 6, 1987, 4:45 PM CDT
- In force
- 33 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Saint Croix 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 6, 4:27 PM CDT | Thunderstorm Wind 0 | 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 12:00Z, 9.2 hours before the alert went out and 93 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
- 216 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 759 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- -32 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 062112 TORMSP WIC109-062215- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 412 PM CDT MON JUL 6 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 515 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL WISCONSIN...ST CROIX AT 408 PM A TORNADO WAS REPORTED ON THE GROUND IN CENTRAL ST CROIX COUNTY BETWEEN BORDMAN AND NEW RICHMOND MOVING EAST AT ABOUT 15 TO 20 MILES AN HOUR..PERSONS IN THE COMMUNITY OF NEW RICHMOND SHOULD BE ALERT FOR POSSIBLE SEVERE WEATHER. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE PATH OF A TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE. OTHERWISE..GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT. KESSLER
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:34 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 26 min |
Nearby
Tornado Warnings in Wisconsin, 1987Every tornado warning in 1987Tornadoes 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.