Alert archive / Wisconsin / Tornado Warnings in 2003

Tornado Warning 1, NWS La Crosse, WI

May 10, 2003Grant County, Wisconsin

NWS La Crosse, WI issued this tornado warning at May 10, 2003, 8:34 PM CDT for Grant County, Wisconsin. It was in force for 56 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, 8:34 PM CDT (01:34 UTC)
Expired: May 10, 2003, 9:30 PM CDT
In force: 56 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 01:32 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, 1.6 hours before the alert went out and 147 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.

367 
WFUS53 KARX 110134
TORARX
WIC043-110230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
834 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 930 PM CDT

* AT 834 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A
  DEVELOPING TORNADO 5 MILES SOUTHWEST OF GLEN HAVEN...OR ABOUT OVER
  GUTTENBERG...MOVING NORTHEAST AT 50 MPH.

* THE DEVELOPING TORNADO IS EXPECTED TO BE...
  NEAR BLOOMINGTON...AND PATCH GROVE AT 840 PM CDT...
  NEAR MOUNT HOPE...AND MILLVILLE AT 845 PM CDT...
  NEAR WERLEY...AND WOODMAN AT 855 PM CDT...
  NEAR HOMER...AND BOSCOBEL AT 900 PM CDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY NOT BE
OCCURRING WHEN THE WARNING IS ISSUED...BUT ONE IS EXPECTED TO
DEVELOP. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...TAKE COVER
IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR

LAT...LON 4272 9102 4274 9106 4278 9108 4287 9109
          4292 9113 4296 9108 4305 9095 4307 9085
          4315 9071 4302 9053 4274 9098

$$

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, 9:33 PM CDT	Tornado Warning	ARX	Grant	57 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.