Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 60, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Sep 5, 2004, 3:44 PM CDT for Cherokee County, O'Brien County, Iowa. It was in force for 46 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, 3:44 PM CDT (20:44 UTC)
- Expired
- Sep 5, 2004, 4:30 PM CDT
- In force
- 46 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Cherokee County, IA, O'Brien County, IA
The radar
The Sioux Falls radar (KFSD), 110 km from the middle of the area, began a volume at 20:48 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, 8.7 hours before the alert went out and 190 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.
271 WFUS53 KFSD 052044 TORFSD IAC035-141-052130- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 343 PM CDT SUN SEP 5 2004 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... CHEROKEE COUNTY IN NORTHWEST IOWA OBRIEN COUNTY IN NORTHWEST IOWA * UNTIL 430 PM CDT * AT 338 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CLEGHORN... OR ABOUT 21 MILES SOUTHEAST OF ORANGE CITY...MOVING NORTHEAST AT 30 MPH. * THE TORNADO WILL BE NEAR... LARRABEE AROUND 350 PM CDT PAULLINA AROUND 400 PM CDT SUTHERLAND AROUND 405 PM CDT PRIMGHAR...ARCHER AROUND 410 PM CDT SANBORN AROUND 420 PM CDT HARTLEY AROUND 430 PM CDT THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE COVER NOW. THIS EXTENDS THE PREVIOUS TORNADO WARNING FOR CHEROKEE COUNTY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA. LAT...LON 4280 9588 4272 9557 4319 9539 4325 9571 $$ RSR
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:17 PM CDT | Tornado Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 28 min |
| Sep 5, 3:30 PM CDT | Tornado Warning | FSD | Lyon, Osceola | 45 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.