Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 29, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 28, 2004, 9:27 PM CDT for Sioux County, Iowa. It was in force for 33 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 28, 2004, 9:27 PM CDT (02:27 UTC)
- Expired
- May 28, 2004, 10:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 69 km from the middle of the area, began a volume at 02:28 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 9:40 PM CDT | TSTM WND GST 60 | 2 S Hawarden, IA | |
| May 28, 9:40 PM CDT | TSTM WND GST 60 | 2 S Hawarden, IA | |
| May 28, 9:40 PM CDT | TSTM WND GST 60 | 2 S Hawarden, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 28, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.5 hours before the alert went out and 191 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
- 821 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1968 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 379 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
357
WFUS53 KFSD 290227
TORFSD
IAC167-290300-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
926 PM CDT FRI MAY 28 2004
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN SIOUX COUNTY IN NORTHWEST IOWA
* UNTIL 1000 PM CDT
* AT 926 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A TORNADO NEAR HAWARDEN...MOVING SOUTHEAST AT 25 MPH.
* THE TORNADO WILL BE NEAR...
IRETON AROUND 940 PM CDT
A TRAINED WEATHER SPOTTER REPORTED A TORNADO 3 MILES SOUTHWEST OF
HAWARDEN AT 920 PM CDT.
A TORNADO HAS BEEN CONFIRMED. TAKE COVER IN A STURDY BUILDING NOW.
MOBILE HOMES AND VEHICLES ARE NOT SAFE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
FRIDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND
NORTHEAST NEBRASKA AND SOUTHEASTERN SOUTH DAKOTA.
LAT...LON 4311 9647 4307 9646 4305 9652 4292 9651
4292 9588 4311 9589
$$
PSThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:47 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 43 min |
| May 28, 8:04 PM CDT | Tornado Warning | FSD | Sioux | 41 min |
| May 28, 8:26 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 49 min |
| May 28, 8:37 PM CDT | Tornado Warning | FSD | Woodbury | 23 min |
| May 28, 8:44 PM CDT | Tornado Warning | FSD | Sioux | 46 min |
| May 28, 8:59 PM CDT | Tornado Warning | FSD | Woodbury | 31 min |
| May 28, 9:31 PM CDT | Tornado Warning | FSD | Woodbury | 29 min |
| May 28, 9:35 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 25 min |
| May 28, 9:48 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 27 min |
| May 28, 9:57 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 33 min |
| May 28, 9:57 PM CDT | Tornado Warning | FSD | Woodbury | 18 min |
| May 28, 10:15 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 15 min |
| May 28, 10:17 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 13 min |
| May 28, 10:30 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 45 min |
| May 28, 10:32 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 28 min |
| May 28, 10:58 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 62 min |
| May 28, 11:13 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 32 min |
| May 28, 11:45 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 30 min |
| May 29, 12:02 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.