Alert archive / Iowa / Tornado Warnings in 2002

Tornado Warning 12, NWS La Crosse, WI

June 21, 2002Chickasaw County, Iowa

NWS La Crosse, WI issued this tornado warning at Jun 21, 2002, 6:16 PM CDT for Chickasaw County, Iowa. It was in force for 74 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
Jun 21, 2002, 6:16 PM CDT (23:16 UTC)
Expired
Jun 21, 2002, 7:30 PM CDT
In force
74 min
Issued by
NWS La Crosse, WI
Area
Counties, with a storm outline in the text

County Chickasaw County, IA

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 21, 5:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 219 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2002-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2002-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
450 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KARX 212316
TORLSE
IAC037-220030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
616 PM CDT FRI JUN 21 2002

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  CHICKASAW COUNTY IN NORTHEAST IOWA

* UNTIL 730 PM CDT

* AT 616 PM CDT...LAW ENFORCEMENT OFFICIALS REPORTED A TORNADO 2
  MILES NORTHEAST OF IONIA...OR ABOUT 6 MILES WEST OF NEW HAMPTON...
  MOVING EAST AT 10 MPH.

* THE TORNADO IS EXPECTED TO BE...
  NEAR NEW HAMPTON AT 635 PM CDT...
  NEAR FREDERICKSBURG AT 705 PM CDT...
  NEAR LAWLER AT 710 PM CDT...

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

LAT...LON 4318 9256 4299 9256 4292 9209 4319 9209

KRC

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 1:16 PM CDTSevere Thunderstorm WarningARXFloyd44 min
Jun 21, 1:24 PM CDTTornado WarningARXFloyd36 min
Jun 21, 3:05 PM CDTTornado WarningARXClayton40 min
Jun 21, 6:06 PM CDTSevere Thunderstorm WarningARXChickasaw84 min

Nearby

Tornado Warnings in Iowa, 2002Every tornado warning in 2002Tornadoes in 2002

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.