Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 121, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Sep 5, 2004, 7:28 PM CDT for Hardin County, Story County, Iowa. It was in force for 47 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, 7:28 PM CDT (00:28 UTC)
- Expired
- Sep 5, 2004, 8:15 PM CDT
- In force
- 47 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Hardin County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 70 km from the middle of the area, began a volume at 00:30 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
Davenport, (KDVN), launched 00:00Z, 0.5 hours before the alert went out and 238 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
- 37 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1543 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS53 KDMX 060028
TORDMX
IAC083-169-060115-
/X.NEW.KDMX.TO.W.0011.040906T0028Z-040906T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
728 PM CDT SUN SEP 5 2004
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN STORY COUNTY IN CENTRAL IOWA.
HARDIN COUNTY IN CENTRAL IOWA.
* UNTIL 815 PM CDT.
* AT 726 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 14 MILES NORTHEAST OF NEVADA...OR 45 MILES NORTH
OF DES MOINES...AND MOVING NORTHEAST AT 30 MPH.
* THIS TORNADIC STORM WILL BE...
NEAR ELDORA BY 755 PM CDT.
THE TOWNS OF ZEARING...MCCALLSBURG...HUBBARD...NEW PROVIDENCE...
ELDORA MUNICIPAL AIRPORT AND STEAMBOAT ROCK 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 4219 9349 4207 9332 4221 9326 4221 9308
4237 9301 4253 9311
$$
BOKSAThe 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, 7:39 PM CDT | Tornado Warning | DMX | Warren | 36 min |
| Sep 5, 7:56 PM CDT | Tornado Warning | DMX | Polk | 49 min |
| Sep 5, 8:17 PM CDT | Tornado Warning | DMX | Story | 43 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.