Alert archive / Iowa / Tornado Warnings in 2004

Tornado Warning 22, NWS La Crosse, WI

July 19, 2004Winneshiek County, Iowa

NWS La Crosse, WI issued this tornado warning at Jul 19, 2004, 2:59 PM CDT for Winneshiek County, Iowa. It was in force for 76 min. 14 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 19, 2004, 2:59 PM CDT (19:59 UTC)
Expired
Jul 19, 2004, 4:15 PM CDT
In force
76 min
Issued by
NWS La Crosse, WI
Area
Counties, with a storm outline in the text

County Winneshiek County, IA

The radar

The La Crosse radar (KARX), 71 km from the middle of the area, began a volume at 20:00 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

TimeReportWhereRemark
Jul 19, 3:08 PM CDTHAIL 0.753 Sw Hesper, IA
Jul 19, 3:08 PM CDTHAIL 0.753 Sw Hesper, IA
Jul 19, 3:09 PM CDTHAIL 1.753 E Burr Oak, IAGOLF BALL SIZE HAIL REPORTED APPROX. 4 MILES SOUTH OF STATE LINE...2 MILES WEST OF LOCUST.
Jul 19, 3:09 PM CDTHAIL 1.753 E Burr Oak, IAGOLF BALL SIZE HAIL REPORTED APPROX. 4 MILES SOUTH OF STATE LINE...2 MILES WEST OF LOCUST.
Jul 19, 3:29 PM CDTHAIL 13 N Decorah, IA
Jul 19, 3:29 PM CDTHAIL 13 N Decorah, IA
Jul 19, 3:32 PM CDTHAIL 1.75Decorah, IANEAR LUTHER COLLEGE.
Jul 19, 3:32 PM CDTHAIL 1.75Decorah, IANEAR LUTHER COLLEGE.
Jul 19, 3:34 PM CDTHAIL 12 N Decorah, IA
Jul 19, 3:34 PM CDTHAIL 12 N Decorah, IA
Jul 19, 3:35 PM CDTHAIL 1.75Decorah, IAHAIL COVERING HIGHWAY 52 NEAR TOWN. REPORTED BY DECORAH POLICE DEPT.
Jul 19, 3:35 PM CDTHAIL 1.75Decorah, IAHAIL COVERING HIGHWAY 52 NEAR TOWN. REPORTED BY DECORAH POLICE DEPT.
Jul 19, 3:36 PM CDTHAIL 0.5Decorah, IAREPORTED AT DISPATCH CENTER.
Jul 19, 3:36 PM CDTHAIL 0.5Decorah, IAREPORTED AT DISPATCH CENTER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 19, 1:40 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.0 hours before the alert went out and 217 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, Davenport, at 12:00Z on 2004-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Davenport, at 12:00Z on 2004-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
1160 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
129 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.

000 
WFUS53 KARX 191959
TORARX
IAC191-192115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
259 PM CDT MON JUL 19 2004

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 415 PM CDT

* AT 259 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A TORNADO 3
  MILES EAST OF BURR OAK...OR ABOUT 11 MILES NORTH OF DECORAH. THE
  TORNADO WAS MOVING SOUTHEAST AT 25 MPH. THIS TORNADO WARNING IS AN
  UPGRADE FROM THE SEVERE THUNDERSTORM WARNING ISSUED FOR WINNESHIEK
  COUNTY.

* THE TORNADO WILL BE NEAR...
  LOCUST AROUND 305 PM CDT...
  HIGHWAY 52 AND COUNTY W 34 AROUND 310 PM CDT...
  COUNTY ROADS W 20 AND A 34 AROUND 315 PM CDT...
  DECORAH AND STATE ROAD 9 AND 245TH STREET AROUND 320 PM CDT...
  NORDNESS AROUND 330 PM CDT...

A TORNADO IS BEING DETECTED BY RADAR. THIS MEANS THAT A TORNADO MAY
NOT BE OCCURRING WHEN THE WARNING IS ISSUED...BUT ONE IS EXPECTED TO
DEVELOP. TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE
LOWEST FLOOR AND STAY AWAY FROM WINDOWS

LAT...LON 4350 9177 4350 9200 4309 9183 4310 9161
      4334 9162

$$

KRC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 1:54 PM CDTSevere Thunderstorm WarningARXAllamakee96 min
Jul 19, 2:55 PM CDTSevere Thunderstorm WarningARXWinneshiek80 min
Jul 19, 4:00 PM CDTSevere Thunderstorm WarningARXFayette90 min

Nearby

Tornado Warnings in Iowa, 2004Every tornado warning in 2004Tornadoes in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.