Alert archive / Iowa / Tornado Warnings in 2000

Tornado Warning 7, NWS La Crosse, WI

June 15, 2000Chickasaw County, Floyd County, Iowa

NWS La Crosse, WI issued this tornado warning at Jun 15, 2000, 7:49 PM CDT for Chickasaw County, Floyd County, Iowa. It was in force for 41 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Jun 15, 2000, 7:49 PM CDT (00:49 UTC)
Expired: Jun 15, 2000, 8:30 PM CDT
In force: 41 min
Issued by: NWS La Crosse, WI
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Chickasaw County, IA, Floyd County, IA

The radar

The La Crosse radar (KARX), 139 km from the middle of the area, began a volume at 00:53 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.

What was reported inside it

Time	Report	Where	Remark
Jun 15, 8:00 PM CDT	Hail 0.75	Charles City, 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.8 hours before the alert went out and 220 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: 3 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 681 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KARX 160049
TORLSE
IAC037-067-160130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
749 PM CDT THU JUN 15 2000

THE NATIONAL WEATHER SERVICE IN IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN FLOYD COUNTY IN NORTH CENTRAL IOWA
  CHICKASAW COUNTY IN NORTHEAST IOWA

* UNTIL 830 PM CDT

* AT 749 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 5 MILES SOUTH OF CHARLES CITY...MOVING EAST AT
  40 MPH.

* THE DEVELOPING TORNADO IS EXPECTED TO BE...
  NEAR NASHUA AT 755 PM CDT
  NEAR IONIA AT 800 PM CDT
  NEAR NEW HAMPTON AT 815 PM CDT
  NEAR FREDERICKSBURG AT 820 PM CDT
  NEAR LAWLER AT 825 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.

RRS

LAT...LON 4307 9282 4290 9277 4293 9211 4319 9210

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 8:32 PM CDT	Tornado Warning	ARX	Chickasaw, Fayette	73 min
Jun 15, 9:00 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	45 min
Jun 15, 9:45 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Winneshiek	45 min

Nearby

Tornado Warnings in Iowa, 2000 Every tornado warning in 2000 Tornadoes in 2000

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; radar from the NEXRAD Level II archive.