Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 58, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Sep 5, 2004, 3:17 PM CDT for 4 counties in Iowa. It was in force for 28 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, 3:17 PM CDT (20:17 UTC)
- Expired
- Sep 5, 2004, 3:45 PM CDT
- In force
- 28 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The Sioux Falls radar (KFSD), 132 km from the middle of the area, began a volume at 20:18 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 12:00Z, 8.3 hours before the alert went out and 142 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
- 231 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1212 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
960 WFUS53 KFSD 052017 TORFSD IAC035-093-149-193-052045- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 317 PM CDT SUN SEP 5 2004 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... CHEROKEE COUNTY IN NORTHWEST IOWA IDA COUNTY IN NORTHWEST IOWA EASTERN PLYMOUTH COUNTY IN NORTHWEST IOWA WOODBURY COUNTY IN NORTHWEST IOWA * UNTIL 345 PM CDT * AT 313 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CORRECTIONVILLE...OR ABOUT 20 MILES NORTHWEST OF IDA GROVE...MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... WASHTA AROUND 335 PM CDT QUIMBY AROUND 345 PM CDT THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE COVER NOW. OTHER SMALL TORNADOES ARE LIKELY TO DEVELOP WITH OTHER THUNDERSTORM CELLS IN THE AREA. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA. LAT...LON 4249 9624 4231 9576 4265 9544 4283 9596 $$ RSR
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:30 PM CDT | Tornado Warning | FSD | Lyon, Osceola | 45 min |
| Sep 5, 3:44 PM CDT | Tornado Warning | FSD | Cherokee, O'Brien | 46 min |
| Sep 5, 4:33 PM CDT | Tornado Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 27 min |
| Sep 5, 4:57 PM CDT | Tornado Warning | FSD | Dickinson | 33 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.