Alert archive / Wisconsin / Tornado Warnings in 2001

Tornado Warning 18, NWS Twin Cities, MN

May 9, 2001Pepin County, Pierce County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at May 9, 2001, 9:16 PM CDT for Pepin County, Pierce County, Wisconsin. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 9, 2001, 9:16 PM CDT (02:16 UTC)
Expired: May 9, 2001, 9:45 PM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Pepin County, WI, Pierce County, WI

The radar

The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 02:18 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 9, 4:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.3 hours before the alert went out and 124 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: 1211 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1740 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 368 m²/s²
0-3 km storm-relative helicity: 795 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KMPX 100216
TORMSP
WIC091-093-100245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
916 PM CDT WED MAY 9 2001

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN
  PIERCE COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 945 PM CDT

* AT 916 PM CDT...SEVERE WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 12   
MILES EAST OF RED WING...MOVING EAST AT 25 MPH.

* SOME LOCATIONS IN THE PATH OF THIS TORNADO INCLUDE...
  MAIDEN ROCK.
  DURAND.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

LAT...LON 4459 9240 4446 9222 4444 9168 4467 9175

&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	61 min
May 9, 8:29 PM CDT	Tornado Warning	MPX	Barron	31 min
May 9, 8:35 PM CDT	Severe Thunderstorm Warning	MPX	Pepin, Pierce	55 min
May 9, 8:59 PM CDT	Tornado Warning	MPX	Barron, Rusk	46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.