Alert archive / Iowa / Tornado Warnings in 2004
Tornado Warning 36, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 11, 2004, 2:15 PM CDT for Buena Vista County, Clay County, Iowa. It was in force for 30 min. 17 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
- Jun 11, 2004, 2:15 PM CDT (19:15 UTC)
- Expired
- Jun 11, 2004, 2:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Buena Vista County, IA, Clay County, IA
The radar
The Sioux Falls radar (KFSD), 153 km from the middle of the area, began a volume at 19:16 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 |
|---|---|---|---|
| Jun 11, 2:20 PM CDT | TORNADO | 2 N Marathon, IA | STORM CHASER. CONE SHAPED WHILE ON THE GROUND WITH DEBRIS CLOUD VERY EVIDENT. |
| Jun 11, 2:23 PM CDT | TORNADO | 3 Ne Sioux Rapids, IA | |
| Jun 11, 2:23 PM CDT | TORNADO | 3 Ne Sioux Rapids, IA | |
| Jun 11, 2:23 PM CDT | TORNADO | 3 Ne Sioux Rapids, IA | |
| Jun 11, 2:26 PM CDT | TORNADO | 5 Nw Marathon, IA | CONE SHAPED TORNADO |
| Jun 11, 2:26 PM CDT | TORNADO | 5 Nw Marathon, IA | CONE SHAPED TORNADO |
| Jun 11, 2:26 PM CDT | TORNADO | 5 Nw Marathon, IA | CONE SHAPED TORNADO |
| Jun 11, 2:28 PM CDT | TORNADO | 3 W Webb, IA | |
| Jun 11, 2:28 PM CDT | TORNADO | 3 W Webb, IA | |
| Jun 11, 2:28 PM CDT | TORNADO | 3 W Webb, IA | |
| Jun 11, 2:33 PM CDT | TORNADO | 2 Ne Marathon, IA | TORNADO A COUPLE HUNDRED YARDS WIDE |
| Jun 11, 2:33 PM CDT | TORNADO | 2 Ne Marathon, IA | TORNADO A COUPLE HUNDRED YARDS WIDE |
| Jun 11, 2:33 PM CDT | TORNADO | 2 Ne Marathon, IA | TORNADO A COUPLE HUNDRED YARDS WIDE |
| Jun 11, 2:45 PM CDT | TORNADO | Webb, IA | 245 PM TO 255 PM. 2 CONFIRMED TORNADES IN WEBB AREA. WINDOWS BLOWN OUT OF HOUSE. TREE AND CROP DAMAGE. |
| Jun 11, 2:46 PM CDT | TORNADO | E Webb, IA | TORNADO ON COUNTY ROAD B63 JUST EAST OF WEBB |
| Jun 11, 2:46 PM CDT | TORNADO | E Webb, IA | TORNADO ON COUNTY ROAD B63 JUST EAST OF WEBB |
| Jun 11, 2:46 PM CDT | TORNADO | E Webb, IA | TORNADO ON COUNTY ROAD B63 JUST EAST OF WEBB |
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 |
|---|---|---|---|
| Jun 11, 1:45 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 7.3 hours before the alert went out and 209 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
- 1910 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 636 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
783 WFUS53 KFSD 111915 TORFSD IAC021-041-111945- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 215 PM CDT FRI JUN 11 2004 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... NORTHERN BUENA VISTA COUNTY IN NORTHWEST IOWA SOUTHERN CLAY COUNTY IN NORTHWEST IOWA * UNTIL 245 PM CDT * AT 215 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES NORTHEAST OF SIOUX RAPIDS...OR ABOUT 15 MILES SOUTH OF SPENCER... MOVING EAST AT 25 MPH. * THE TORNADO WILL BE NEAR... WEBB...MARATHON AROUND 220 PM CDT IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA. LAT...LON 4298 9515 4286 9518 4284 9493 4300 9494 $$ BOUSTEAD
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 2:53 AM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 37 min |
| Jun 11, 3:21 AM CDT | Severe Thunderstorm Warning | FSD | Ida | 24 min |
| Jun 11, 3:45 AM CDT | Severe Thunderstorm Warning | FSD | Ida | 30 min |
| Jun 11, 1:00 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 30 min |
| Jun 11, 1:30 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 30 min |
| Jun 11, 1:50 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 40 min |
| Jun 11, 2:34 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 26 min |
| Jun 11, 2:45 PM CDT | Tornado Warning | FSD | Clay | 30 min |
| Jun 11, 2:48 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Osceola | 42 min |
| Jun 11, 2:59 PM CDT | Tornado Warning | FSD | Clay | 31 min |
| Jun 11, 3:30 PM CDT | Tornado Warning | FSD | Clay | 30 min |
| Jun 11, 3:32 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 28 min |
| Jun 11, 3:37 PM CDT | Tornado Warning | FSD | Dickinson | 23 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.