Alert archive / Iowa / Tornado Warnings in 2002

Tornado Warning 7, NWS La Crosse, WI

May 8, 2002Allamakee County, Iowa

NWS La Crosse, WI issued this tornado warning at May 8, 2002, 8:01 PM CDT for Allamakee County, Iowa. It was in force for 59 min. 3 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: May 8, 2002, 8:01 PM CDT (01:01 UTC)
Expired: May 8, 2002, 9:00 PM CDT
In force: 59 min
Issued by: NWS La Crosse, WI
Area: Whole counties

County Allamakee County, IA

What was reported inside it

Time	Report	Where
May 8, 8:10 PM CDT	Thunderstorm Wind 58 E	Waukon, IA
May 8, 8:10 PM CDT	Tornado F0	Waukon, IA
May 8, 8:16 PM CDT	Thunderstorm Wind 62 E	Waukon, IA

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 watch it was issued in

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

Issued	Product	Office	Lasted
May 8, 6:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 199 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: 1642 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 951 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KARX 090101
TORLSE
IAC005-090200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
800 PM CDT WED MAY 8 2002

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 900 PM CDT

* AT 800 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 3 MILES SOUTHWEST OF WAUKON..MOVING EAST AT 
  25 MPH.

* THE DEVELOPING TORNADO IS EXPECTED TO BE...
  NEAR NEW ALBIN AT 815 PM CDT...
  NEAR LANSING...AND HARPERS FERRY AT 830 PM CDT...

CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR A STURDY BUILDING. AS A
LAST RESORT...LAY FLAT IN A DITCH AND COVER YOUR HEAD.

BOYNE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 7:01 PM CDT	Tornado Warning	ARX	Winneshiek	59 min
May 8, 7:37 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	53 min
May 8, 8:56 PM CDT	Flash Flood Warning	ARX	Allamakee	3 hr

Nearby

Tornado Warnings in Iowa, 2002 Every tornado warning in 2002 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.