Alert archive / Iowa / Tornado Warnings in 2004

Tornado Warning 64, NWS Des Moines, IA

May 24, 2004Decatur County, Iowa

NWS Des Moines, IA issued this tornado warning at May 24, 2004, 7:30 PM CDT for Decatur County, Iowa. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 24, 2004, 7:30 PM CDT (00:30 UTC)
Expired: May 24, 2004, 8:30 PM CDT
In force: 60 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Decatur County, IA

The radar

The Des Moines radar (KDMX), 109 km from the middle of the area, began a volume at 00:34 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.

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 24, 11:30 AM CDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.5 hours before the alert went out and 221 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: -118 m²/s²
0-3 km storm-relative helicity: -81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 250030 CCA
TORDMX
IAC053-250130-

BULLETIN - EAS ACTIVATION REQUESTED...CORRECTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
723 PM CDT MON MAY 24 2004
CORRECTED TO WARN FOR ALL DECATUR COUNTY

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  DECATUR COUNTY IN SOUTH CENTRAL IOWA

* UNTIL 830 PM CDT

* AT 719 PM...RADAR INDICATED A THUNDERSTORM WITH A HISTORY OF
  TORNADOES 9 MILES WEST OF LAMONI...OR ABOUT 67 MILES SOUTH OF
  DES MOINES...MOVING EAST AT 30 MPH.

* THE STORM WILL BE...

  3 MILES NORTH OF LAMONI MUNICIPAL AIRPORT AROUND 735 PM...
  NEAR DAVIS CITY AROUND 745 PM AND
  5 MILES SOUTH OF LEON AROUND 750 PM.

THIS IS A HAZARDOUS SITUATION. SEEK SHELTER IN A BASEMENT...OR IN AN
INTERIOR ROOM. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE OR IN A
CAR...SEEK SHELTER IN A REINFORCED BUILDING.

LAT...LON 4084 9400 4060 9399 4062 9359 4087 9362

$$

DONAVON

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 7:03 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	57 min
May 24, 7:06 PM CDT	Tornado Warning	DMX	Mahaska	54 min
May 24, 7:11 PM CDT	Flash Flood Warning	DMX	Adair, Clarke, Lucas, Union, Wayne	18 hr
May 24, 7:15 PM CDT	Tornado Warning	DMX	Warren	30 min
May 24, 7:16 PM CDT	Flash Flood Warning	DMX	Jasper	18 hr
May 24, 7:23 PM CDT	Tornado Warning	DMX	Decatur	67 min
May 24, 7:27 PM CDT	Tornado Warning	DMX	Ringgold	33 min
May 24, 7:28 PM CDT	Severe Thunderstorm Warning	DMX	Marion	47 min
May 24, 7:38 PM CDT	Tornado Warning	DMX	Jasper	52 min
May 24, 7:42 PM CDT	Tornado Warning	DMX	Appanoose	48 min
May 24, 7:47 PM CDT	Flash Flood Warning	DMX	Poweshiek	18 hr
May 24, 7:53 PM CDT	Severe Thunderstorm Warning	DMX	Wayne	67 min
May 24, 7:58 PM CDT	Severe Thunderstorm Warning	DMX	Lucas	47 min
May 24, 8:13 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis, Monroe, Wapello	18 hr
May 24, 8:17 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	43 min
May 24, 8:28 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe	57 min
May 24, 8:52 PM CDT	Tornado Warning	DMX	Appanoose	23 min
May 24, 8:56 PM CDT	Tornado Warning	DMX	Davis	49 min

Nearby

Tornado Warnings in Iowa, 2004 Every tornado warning in 2004 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.