Alert archive / Iowa / Tornado Warnings in 2004

Tornado Warning 89, NWS Des Moines, IA

August 3, 2004Greene County, Iowa

NWS Des Moines, IA issued this tornado warning at Aug 3, 2004, 3:48 PM CDT for Greene County, Iowa. It was in force for 42 min. 3 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: Aug 3, 2004, 3:48 PM CDT (20:48 UTC)
Expired: Aug 3, 2004, 4:30 PM CDT
In force: 42 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Greene County, IA

The radar

The Des Moines radar (KDMX), 74 km from the middle of the area, began a volume at 20:49 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
Aug 3, 4:03 PM CDT	HAIL 0.75	Churdan, IA
Aug 3, 4:10 PM CDT	HAIL 1	Churdan, IA
Aug 3, 4:15 PM CDT	HAIL 0.88	Dana, IA	WOI

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.8 hours before the alert went out and 181 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: 1625 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 1720 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 106 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 KDMX 032048
TORDMX
IAC073-032130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
348 PM CDT TUE AUG 3 2004

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN GREENE COUNTY IN WEST CENTRAL IOWA

* UNTIL 430 PM CDT

* AT 345 PM CDT...RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING
  A TORNADO 11 MILES WEST OF CHURDAN...OR ABOUT 34 MILES SOUTHWEST OF
  FORT DODGE...MOVING EAST AT 30 MPH.

* THE STORM WILL BE...

  NEAR CHURDAN AROUND 405 PM CDT...
  9 MILES NORTH OF JEFFERSON AROUND 420 PM CDT...
  9 MILES NORTH OF JEFFERSON MUNICIPAL AIRPORT AROUND 425 PM CDT AND
  NEAR DANA AROUND 430 PM CDT.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT 
TUESDAY AFTERNOON FOR NORTHERN IOWA. 

LAT...LON 4220 9465 4198 9463 4196 9417 4220 9418

$$

JUNGBLUTH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 1:51 AM CDT	Severe Thunderstorm Warning	DMX	Greene	54 min
Aug 3, 2:11 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun	34 min
Aug 3, 2:42 AM CDT	Severe Thunderstorm Warning	DMX	Greene	58 min
Aug 3, 3:03 AM CDT	Severe Thunderstorm Warning	DMX	Boone	57 min
Aug 3, 3:55 AM CDT	Severe Thunderstorm Warning	DMX	Polk	60 min
Aug 3, 4:29 AM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	61 min
Aug 3, 4:31 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	59 min
Aug 3, 4:43 AM CDT	Severe Thunderstorm Warning	DMX	Boone	57 min
Aug 3, 5:11 AM CDT	Severe Thunderstorm Warning	DMX	Polk	49 min
Aug 3, 5:29 AM CDT	Severe Thunderstorm Warning	DMX	Marion	61 min
Aug 3, 5:35 AM CDT	Severe Thunderstorm Warning	DMX	Monroe	55 min
Aug 3, 6:58 AM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	47 min
Aug 3, 1:12 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	63 min
Aug 3, 1:53 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	52 min
Aug 3, 2:34 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago	56 min
Aug 3, 2:44 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	31 min
Aug 3, 3:02 PM CDT	Severe Thunderstorm Warning	DMX	Worth	58 min
Aug 3, 3:05 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	55 min
Aug 3, 3:34 PM CDT	Severe Thunderstorm Warning	DMX	Webster	56 min
Aug 3, 3:56 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	34 min
Aug 3, 4:17 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton	43 min
Aug 3, 4:19 PM CDT	Severe Thunderstorm Warning	DMX	Franklin	41 min
Aug 3, 4:27 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	48 min
Aug 3, 4:38 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Grundy	52 min
Aug 3, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	Story	33 min
Aug 3, 4:52 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	53 min
Aug 3, 4:57 PM CDT	Severe Thunderstorm Warning	DMX	Boone	33 min
Aug 3, 5:02 PM CDT	Tornado Warning	DMX	Marshall	43 min
Aug 3, 5:16 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	29 min
Aug 3, 5:23 PM CDT	Severe Thunderstorm Warning	DMX	Tama	52 min
Aug 3, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Story	48 min
Aug 3, 5:28 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	47 min
Aug 3, 5:32 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy	58 min
Aug 3, 5:44 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	31 min
Aug 3, 6:38 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	52 min
Aug 3, 6:53 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	37 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.