Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 91, NWS Milwaukee, WI

October 23, 2001Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Oct 23, 2001, 9:58 PM CDT for Rock County, Wisconsin. It was in force for 62 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: Oct 23, 2001, 9:58 PM CDT (02:58 UTC)
Expired: Oct 23, 2001, 11:00 PM CDT
In force: 62 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

County Rock County, WI

The radar

The Milwaukee radar (KMKX), 54 km from the middle of the area, began a volume at 03:02 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
Oct 23, 10:36 PM CDT	Hail 0.88	Orfordville, WI
Oct 23, 10:57 PM CDT	Hail 1.75	Afton, WI
Oct 23, 11:06 PM CDT	Hail 1.75	Avalon, 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

Davenport, (KDVN), launched 00:00Z, 3.0 hours before the alert went out and 166 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: 542 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

450 
WUUS53 KMKX 240259
SVRMKE
WIC105-240400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE-SULLIVAN WI
958 PM CDT TUE OCT 23 2001

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ROCK COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 1100 PM CDT

* AT 958 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 14 MILES WEST OF ORFORDVILLE...OR ABOUT 6 MILES
  EAST OF MONROE...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ORFORDVILLE AT 1015 PM CDT.
  EVANSVILLE AT 1020 PM CDT.
  FOOTVILLE AT 1025 PM CDT.
  JANESVILLE AT 1040 PM CDT.

IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD PREPARE FOR
DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. SEEK SHELTER IMMEDIATELY

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 23, 9:31 PM CDT	Severe Thunderstorm Warning	MKX	Green	59 min
Oct 23, 10:26 PM CDT	Severe Thunderstorm Warning	MKX	Green	49 min
Oct 23, 10:45 PM CDT	Tornado Warning	MKX	Rock	60 min
Oct 23, 11:02 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	58 min
Oct 23, 11:57 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	63 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001 Every severe thunderstorm warning in 2001

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.