Alert archive / Wisconsin / Tornado Warnings in 2001

Tornado Warning 4, NWS Milwaukee, WI

October 23, 2001Rock County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Oct 23, 2001, 10:45 PM CDT for Rock County, Wisconsin. It was in force for 60 min. 2 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, 10:45 PM CDT (03:45 UTC)
Expired: Oct 23, 2001, 11:45 PM CDT
In force: 60 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 03:48 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
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, 3.8 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.

649 
WFUS53 KMKX 240346
TORMKE
WIC105-240445-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE-SULLIVAN WI
1045 PM CDT TUE OCT 23 2001

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* TORNADO WARNING FOR...
  ROCK COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 1145 PM CDT

* AT 1045 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO. THE MOST DANGEROUS PORTION OF THE STORM WAS
  LOCATED 4 MILES SOUTHEAST OF ORFORDVILLE...OR ABOUT 10 MILES
  NORTHWEST OF BELOIT...MOVING EAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  BELOIT AT 1055 PM CDT.
  JANESVILLE AT 1100 PM CDT.
  CLINTON AT 1115 PM CDT.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. ALWAYS STAY AWAY FROM
WINDOWS

DAVIS

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, 9:58 PM CDT	Severe Thunderstorm Warning	MKX	Rock	62 min
Oct 23, 10:26 PM CDT	Severe Thunderstorm Warning	MKX	Green	49 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

Tornado Warnings in Wisconsin, 2001 Every tornado warning in 2001 Tornadoes 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.