Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 92, NWS La Crosse, WI

July 2, 2000Floyd County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 2, 2000, 4:11 PM CDT for Floyd County, Iowa. It was in force for 64 min. No storm report in the archive falls 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.

The facts

Issued: Jul 2, 2000, 4:11 PM CDT (21:11 UTC)
Expired: Jul 2, 2000, 5:15 PM CDT
In force: 64 min
Issued by: NWS La Crosse, WI
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Floyd County, IA

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 2, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.2 hours before the alert went out and 205 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: 18 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 1180 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 384 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

546 
WUUS53 KARX 022112
SVRLSE
IAC067-022215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
411 PM CDT SUN JUL 2 2000

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FLOYD COUNTY IN NORTH CENTRAL IOWA

* UNTIL 515 PM CDT

* AT 411 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHEAST OF FLOYD...OR ABOUT 7 MILES
  NORTH OF CHARLES CITY...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
  NEAR CHARLES CITY AT 425 PM CDT

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR
YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.

RIECK

LAT...LON 4327 9258 4319 9280 4295 9275 4301 9257

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:18 PM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell	57 min
Jul 2, 3:51 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	54 min
Jul 2, 4:05 PM CDT	Tornado Warning	ARX	Allamakee, Winneshiek	55 min
Jul 2, 4:45 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	60 min
Jul 2, 5:00 PM CDT	Flash Flood Warning	ARX	Chickasaw	3 hr
Jul 2, 5:08 PM CDT	Flash Flood Warning	ARX	Allamakee	3 hr
Jul 2, 5:20 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	55 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2000 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.