Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 10, NWS Twin Cities, MN

June 15, 1997Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 15, 1997, 2:45 PM CDT for Pierce County, Saint Croix County, Wisconsin. It was in force for 60 min. 3 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 15, 1997, 2:45 PM CDT (19:45 UTC)
Expired: Jun 15, 1997, 3:45 PM CDT
In force: 60 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Pierce County, WI, Saint Croix County, WI

What was reported inside it

Time	Report	Where
Jun 15, 3:15 PM CDT	Hail 0.75	River Falls, WI
Jun 15, 3:15 PM CDT	Hail 0.75	Baldwin, WI
Jun 15, 3:25 PM CDT	Hail 1	Olivet, 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.8 hours before the alert went out and 92 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: 202 J/kg
Mixed-layer CIN: -176 J/kg
Mixed-layer LCL: 1188 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 151947 RRA
SVRMSP
WIC093-109-152045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
245 PM CDT SUN JUN 15 1997

* SEVERE THUNDERSTORM WARNING FOR
  PIERCE COUNTY - WEST CENTRAL WISCONSIN
  ST CROIX COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 345 PM CDT
 
* SOME LOCATIONS AFFECTED
    RIVER FALLS
    HUDSON
    NEW RICHMOND
    ELLSWORTH

* AT 242 PM CDT DOPPLER RADAR INDICATED SEVERE STORMS WITH LARGE
  HAIL FROM ST. PAUL TO 15 MILES EAST OF ST. PAUL.  THE STORMS WERE
  MOVING EAST AT 35 MPH.

THESE ARE DANGEROUS STORMS...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.


HOWIESON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 3:24 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	36 min
Jun 15, 3:53 PM CDT	Tornado Warning	MPX	Chippewa, Dunn, Eau Claire	37 min
Jun 15, 4:25 PM CDT	Tornado Warning	MPX	Eau Claire	35 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1997 Every severe thunderstorm warning in 1997

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.