Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 209, NWS Twin Cities, MN

August 23, 1997Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 23, 1997, 5:27 PM CDT for Dunn County, Wisconsin. It was in force for 63 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: Aug 23, 1997, 5:27 PM CDT (22:27 UTC)
Expired: Aug 23, 1997, 6:30 PM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 22:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 23, 5:55 PM CDT	Hail 1.75	Meridean, WI	Severe hail damage to thousands of acres of crops around Spring Brook township. Car damage also reported.

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, 10.5 hours before the alert went out and 135 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 800 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 320 m²/s²
0-3 km storm-relative helicity: 381 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 232230 RRA
SVRMSP
WIC033-232330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
527 PM CDT SAT AUG 23 1997


* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN DUNN COUNTY - WEST CENTRAL WISCONSIN

* UNTIL 630 PM CDT

* SOME LOCATIONS AFFECTED
    RUSK
    MENOMONIE
    ELK MOUND
    DOWNSVILLE

* AT 530 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL 5 MILES SOUTH OF RIDGELAND...OR ABOUT 15 MILES NORTH OF
  MENOMONIE.  THE STORM WAS MOVING SOUTH AT 30 TO 35 MPH.

THIS STORM HAS A HISTORY OF PRODUCING GOLF BALL SIZED HAIL.
THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.

A TORNADO WATCH IS IN EFFECT.  SEVrERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

MILLER


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 4:56 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn	49 min
Aug 23, 6:09 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	46 min
Aug 23, 6:13 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	42 min
Aug 23, 6:31 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	44 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; radar from the NEXRAD Level II archive.