Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 124, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Sep 5, 2004, 8:17 PM CDT for Story County, Iowa. It was in force for 43 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
- Sep 5, 2004, 8:17 PM CDT (01:17 UTC)
- Expired
- Sep 5, 2004, 9:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Story County, IA
The radar
The Des Moines radar (KDMX), 34 km from the middle of the area, began a volume at 01:17 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 |
|---|---|---|---|
| Sep 5, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 246 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.
- Mixed-layer CAPE
- 8 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1414 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
221 WFUS53 KDMX 060117 TORDMX IAC169-060200- /X.NEW.KDMX.TO.W.0014.040906T0117Z-040906T0200Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 817 PM CDT SUN SEP 5 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... STORY COUNTY IN CENTRAL IOWA. * UNTIL 900 PM CDT. * AT 813 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR HUXLEY...OR 22 MILES NORTH OF DES MOINES... AND MOVING NORTH AT 25 MPH. * THIS TORNADIC STORM WILL BE... NEAR AMES BY 830 PM CDT. 6 MILES WEST OF NEVADA BY 835 PM CDT. 6 MILES SOUTHEAST OF STORY CITY BY 855 PM CDT. THE TOWNS OF SLATER...CAMBRIDGE...KELLEY...AMES MUNICIPAL AIRPORT... GILBERT...ROLAND AND MCCALLSBURG ARE ALSO IN THE PATH OF THIS TORNADIC STORM. WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. LAT...LON 4187 9370 4187 9333 4221 9334 4221 9371 $$ BOKSA
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 7:15 PM CDT | Tornado Warning | DMX | Hamilton, Wright | 30 min |
| Sep 5, 7:16 PM CDT | Tornado Warning | DMX | Madison | 29 min |
| Sep 5, 7:28 PM CDT | Tornado Warning | DMX | Hardin, Story | 47 min |
| Sep 5, 7:39 PM CDT | Tornado Warning | DMX | Warren | 36 min |
| Sep 5, 7:56 PM CDT | Tornado Warning | DMX | Polk | 49 min |
| Sep 5, 8:44 PM CDT | Tornado Warning | DMX | Lucas, Warren | 31 min |
| Sep 5, 8:48 PM CDT | Tornado Warning | DMX | Jasper, Polk | 27 min |
| Sep 5, 9:03 PM CDT | Tornado Warning | DMX | Marshall, Story | 42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.