Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 49, NWS Twin Cities, MN

June 12, 1990Chippewa County, Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 12, 1990, 7:09 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 66 min. 4 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: Jun 12, 1990, 7:09 PM CDT (00:09 UTC)
Expired: Jun 12, 1990, 8:15 PM CDT
In force: 66 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
Jun 12, 7:35 PM CDT	Hail 1.75	Eau Claire, WI
Jun 12, 7:35 PM CDT	Thunderstorm Wind 63	Chippewa, WI
Jun 12, 7:40 PM CDT	Thunderstorm Wind 62	Chippewa, WI
Jun 12, 7:50 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 00:00Z, 0.2 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1326 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSP 130014
SVRMSP
WIC017-035-130115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
709 PM CDT TUE JUN 12 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN WEST CENTRAL WISCONSIN
          ...CHIPPEWA...EAU CLAIRE
 
A LINE OF SEVERE THUNDERSTORMS IS MOVING ACROSS CHIPPEWA AND EAU
CLAIRE COUNTIES. TOWNS IN THE PATH OF THIS LINE OF SEVERE
THUNDERSTORMS ARE CHIPPEWA FALLS AND EAU CLAIRE. SEVENTY MILE AN HOUR
WINDS WERE REPORTED IN WILSON WHICH IS 10 MILES WEST OF MENOMONIE.
 
 
WINDS IN EXCESS OF 75 MPH..MAKE THIS A DANGEROUS STORMN. YOU SHOULD
PREPARE FOR STRONG WINDS..LARGE HAIL..DEADLY LIGHTNING AND HEAVY RAIN
BY MOVING TO SHELTER IN A STRONG BUILDING. REMEMBER SEVERE
THUNDERSTORMS CAN AND DO PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
JHM

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 9:48 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce	42 min
Jun 13, 12:50 AM CDT	Flash Flood Warning	MPX	Pepin	115 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1990 Every severe thunderstorm warning in 1990

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.