Alert archive / Wisconsin / Tornado Warnings in 2003

Tornado Warning 2, NWS La Crosse, WI

May 10, 2003Grant County, Wisconsin

NWS La Crosse, WI issued this tornado warning at May 10, 2003, 9:33 PM CDT for Grant County, Wisconsin. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 10, 2003, 9:33 PM CDT (02:33 UTC)
Expired: May 10, 2003, 10:30 PM CDT
In force: 57 min
Issued by: NWS La Crosse, WI
Area: Counties, with a storm outline in the text

County Grant County, WI

The radar

The La Crosse radar (KARX), 105 km from the middle of the area, began a volume at 02:36 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 10, 6:15 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.6 hours before the alert went out and 151 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: 1566 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 12.7

Open this sounding in Storm Lab

The text

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

208 
WFUS53 KARX 110233
TORARX
WIC043-110330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
932 PM CDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT COUNTY IN SOUTHWEST WISCONSIN

* UNTIL 1030 PM CDT

* AT 932 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A
  DEVELOPING TORNADO 2 MILES SOUTHWEST OF CASTLE ROCK...OR ABOUT 
  14 MILES NORTHEAST OF LANCASTER...MOVING NORTHEAST AT 40 MPH.

* THE DEVELOPING TORNADO IS EXPECTED TO BE...
  NEAR SPURGEON VINEYARDS AND WINERY AT 940 PM CDT

TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR

LAT...LON 4286 9068 4302 9080 4320 9044 4296 9043

$$

BOYNE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:25 PM CDT	Severe Thunderstorm Warning	ARX	Adams	50 min
May 10, 7:56 PM CDT	Severe Thunderstorm Warning	ARX	Grant	19 min
May 10, 8:34 PM CDT	Tornado Warning	ARX	Grant	56 min
May 10, 9:37 PM CDT	Severe Thunderstorm Warning	ARX	Richland	53 min
May 10, 10:09 PM CDT	Flash Flood Warning	ARX	Grant	3 hr
May 10, 10:36 PM CDT	Flash Flood Warning	ARX	Richland	2 hr

Nearby

Tornado Warnings in Wisconsin, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.