Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 20, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 7, 1987, 6:01 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 14 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
- Jun 7, 1987, 6:01 PM CDT (23:01 UTC)
- Expired
- Jun 7, 1987, 6:15 PM CDT
- In force
- 14 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 |
|---|---|---|---|
| Jun 7, 6:05 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, 11.0 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
- 556 J/kg
- Mixed-layer CIN
- -643 J/kg
- Mixed-layer LCL
- 1942 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 7, 4:04 PM CDT, 1 hour 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 145 PM CDT SAT JUN 6 1987 ...SEVERE THUNDERSTORM WARNING IN ISANTI COUNTY UNTIL 415 PM CDT AND THUNDERSTORMS MOVING OVER ST CROIX RIVER VALLEY... A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR ISANTI COUNTY UNTIL 415 PM CDT THIS AFTERNOON. AT 355 PM RADAR INDICATED A VERY STRONG THUNDERSTORM JUST NORTHEAST OF ISANTI IN SOUTHERN ISANTI COUNTY. THIS THUNDERSTORM WAS MOVING EAST AND WILL PASS THROUGH THE TOWNS OF SPRING LAKE AND WEBER. THE THUNDERSTORM WILL MOVE INTO CHISAGO COUNTY AROUND 415 PM AND HEAD TOWARD THE TOWN OF NORTH BRANCH. THUNDERSTORMS WILL ALSO BE CROSSING THE ST CROIR RIVER VALLEY BETWEEN 4m00PM AND 500 PM JUST TO THE NORTH OF TAYLORS FALLS INTO POLK COUNTY. THOSE CAMPING OR BOATING ON THE ST CROIX RIVER NORTH OF TAYLOR FALLS SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY. WJH
Local storm report, Jun 7, 4:12 PM CDT, 1 hour 49 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD, MN
410 PM CDT SUN JUN 7 1987
...ATTN CELS...
7 JUN 1987
TIME EVENT LOCATION
315 PM CDT RAINFALL 1.17 INCH IN 20 MINUTES ST. CLOUD WEATHER
SERVICE OFFICE
302 PM CDT WIND GUST TO 50 KNOTS ST. CLOUD WEATHER
SERVICE OFFICE
320 PM CDTu CONSIDERABLE TREE DAMAGE BECKER MINNESOTA
...20 MILES SOUTH
EAST OF ST. CLOUD
FRASERThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 5:31 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Rusk | 44 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.