Alert archive / Iowa / Tornado Warnings in 2004

Tornado Warning 75, NWS Des Moines, IA

June 11, 2004Palo Alto County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 11, 2004, 4:45 PM CDT for Palo Alto County, Iowa. It was in force for 45 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: Jun 11, 2004, 4:45 PM CDT (21:45 UTC)
Expired: Jun 11, 2004, 5:30 PM CDT
In force: 45 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Palo Alto County, IA

The radar

The Des Moines radar (KDMX), 169 km from the middle of the area, began a volume at 21:46 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
Jun 11, 1:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.8 hours before the alert went out and 210 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: 572 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

031 
WFUS53 KDMX 112145
TORDMX
IAC147-112230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
445 PM CDT FRI JUN 11 2004

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN PALO ALTO COUNTY IN NORTHWEST IOWA

* UNTIL 530 PM CDT

* AT 442 PM...RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO 3 MILES SOUTHEAST OF EMMETSBURG...OR ABOUT 26 MILES EAST OF
  SPENCER...MOVING NORTHEAST AT 25 MPH.

* THE STORM WILL BE...

  3 MILES NORTHWEST OF CYLINDER AROUND 450 PM.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY
ISSUED FOR THE WARNED AREA.

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 4323 9471 4291 9470 4292 9446 4325 9446

$$

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:44 AM CDT	Severe Thunderstorm Warning	DMX	Sac	46 min
Jun 11, 2:28 PM CDT	Tornado Warning	DMX	Palo Alto	57 min
Jun 11, 3:24 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	56 min
Jun 11, 4:01 PM CDT	Tornado Warning	DMX	Kossuth	44 min
Jun 11, 4:20 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	25 min
Jun 11, 4:39 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	51 min
Jun 11, 4:47 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth	58 min
Jun 11, 5:22 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	53 min
Jun 11, 6:00 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Webster	45 min
Jun 11, 6:09 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt	51 min
Jun 11, 6:14 PM CDT	Flash Flood Warning	DMX	Kossuth	3 hr
Jun 11, 6:17 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	43 min
Jun 11, 6:24 PM CDT	Severe Thunderstorm Warning	DMX	Hancock	56 min
Jun 11, 6:28 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	47 min
Jun 11, 6:36 PM CDT	Tornado Warning	DMX	Webster	24 min
Jun 11, 6:56 PM CDT	Tornado Warning	DMX	Webster	34 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.