Alert archive / Iowa / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 8, NWS La Crosse, WI

May 11, 2000Fayette County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at May 11, 2000, 7:15 PM CDT for Fayette County, Iowa. It was in force for 60 min. 8 reports 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: May 11, 2000, 7:15 PM CDT (00:15 UTC)
Expired: May 11, 2000, 8:15 PM CDT
In force: 60 min
Issued by: NWS La Crosse, WI
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Fayette County, IA

What was reported inside it

Time	Report	Where	Remark
May 11, 7:18 PM CDT	Hail 1.75	Waucoma, IA
May 11, 7:45 PM CDT	Hail 1.5	Dunkerton, IA
May 11, 7:45 PM CDT	Tornado F0	Fairbank, IA	A weak tornado, which produced no damage in Buchanan County, moved into the extreme northwest part of the county from Black Hawk County around 8 pm CDT. The tornado was rated an F0 with an estimated path length of 2 miles. This is likely the decaying stage o
May 11, 7:52 PM CDT	Hail 1.75	Fairbank, IA
May 11, 8:15 PM CDT	Thunderstorm Wind 61 M	Fairbank, IA
May 11, 8:20 PM CDT	Hail 0.75	Oelwein, IA
May 11, 8:20 PM CDT	Tornado F2	Dunkerton, IA	Two houses destroyed
May 11, 8:20 PM CDT	Tornado F1	Hazleton, IA	A second tornado touched down 4 miles southwest of Hazelton with a continuous path for 8 miles to a point 4 miles southeast of Hazelton. At it's maximum, it produced F1 damage with a path width of about 1000 feet. This includes damage to major power lines an

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 11, 6:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.3 hours before the alert went out and 187 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: 2323 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1261 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 13.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KARX 120016
SVRLSE
IAC065-120115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
715 PM CDT THU MAY 11 2000

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAYETTE COUNTY IN NORTHEAST IOWA

* UNTIL 815 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 12 MILES NORTH 
  OF SUMNER TO 4 MILES SOUTHWEST OF FAIRBANK. THIS ACTIVITY WAS 
  MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  NEAR WESTGATE AND HAWKEYE AT 715 PM CDT
  NEAR OELWEIN AND MAYNARD AT 725 PM CDT
  NEAR WEST UNION AND ELDORADO AT 730 PM CDT
  NEAR STANLEY AND FAYETTE AT 735 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.

WELVAERT

LAT...LON 4309 9222 4292 9212 4247 9221 4265 9160
          4311 9161

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:00 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	30 min
May 11, 7:58 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	62 min
May 11, 8:12 PM CDT	Severe Thunderstorm Warning	ARX	Fayette	78 min
May 11, 8:25 PM CDT	Tornado Warning	ARX	Clayton	35 min
May 11, 8:50 PM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	40 min
May 12, 6:13 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Winneshiek	32 min
May 12, 6:43 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee	62 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.