Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 16, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 26, 2004, 7:47 PM CDT for Lyon County, Iowa; Rock County, Minnesota. It was in force for 43 min. 1 report 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 26, 2004, 7:47 PM CDT (00:47 UTC)
- Expired
- May 26, 2004, 8:30 PM CDT
- In force
- 43 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Lyon County, IA, Rock County, MN
The radar
The Sioux Falls radar (KFSD), 46 km from the middle of the area, began a volume at 00:48 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 26, 8:10 PM CDT | HAIL 0.75 | 3 E Steen, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 235 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
- 169 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 2219 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
146
WFUS53 KFSD 270047
TORFSD
IAC119-MNC133-270130-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
746 PM CDT WED MAY 26 2004
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
NORTHERN LYON COUNTY IN NORTHWEST IOWA
SOUTHERN ROCK COUNTY IN SOUTHWEST MINNESOTA
* UNTIL 830 PM CDT
* AT 746 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER HILLS...OR
ABOUT 10 MILES NORTHWEST OF ROCK RAPIDS...MOVING EAST AT 30 MPH.
* THE TORNADO WILL BE NEAR...
ROCK RAPIDS AROUND 800 PM CDT
LITTLE ROCK AROUND 825 PM CDT
THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY
ISSUED FOR THE WARNED AREA.
IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY.
LAT...LON 4363 9639 4340 9643 4333 9588 4350 9587
4350 9606 4364 9611
$$
RSRThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 8:34 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 41 min |
| May 26, 7:05 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 30 min |
| May 26, 7:13 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 47 min |
| May 26, 7:21 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 39 min |
| May 26, 7:30 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 30 min |
| May 26, 7:35 PM CDT | Tornado Warning | FSD | Jackson, Nobles | 25 min |
| May 26, 7:50 PM CDT | Severe Thunderstorm Warning | FSD | Murray | 35 min |
| May 26, 7:59 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 46 min |
| May 26, 8:11 PM CDT | Severe Thunderstorm Warning | FSD | Nobles | 34 min |
| May 26, 8:15 PM CDT | Tornado Warning | FSD | Jackson | 45 min |
| May 26, 8:48 PM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 42 min |
Nearby
Tornado Warnings in Iowa, 2004Tornado Warnings in Minnesota, 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.