Alert archive / Iowa / Tornado Warnings in 2005
Tornado Warning 6, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 4, 2005, 10:24 PM CDT for Sioux County, Iowa. It was in force for 51 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
- Jun 4, 2005, 10:24 PM CDT (03:24 UTC)
- Expired
- Jun 4, 2005, 11:15 PM CDT
- In force
- 51 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 03:28 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.4 hours before the alert went out and 193 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
- 1467 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1297 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 050324 TORFSD IAC167-050415- /O.NEW.KFSD.TO.W.0006.050605T0324Z-050605T0415Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1024 PM CDT SAT JUN 4 2005 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SIOUX COUNTY IN NORTHWEST IOWA * UNTIL 1115 PM CDT * AT 1024 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES WEST OF IRETON...OR ABOUT NEAR HAWARDEN...MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... IRETON AROUND 1030 PM CDT SIOUX CENTER AROUND 1055 PM CDT HULL AROUND 1110 PM CDT THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR THE WARNED AREA. TAKE COVER NOW. TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT WAIT UNTIL YOU SEE OR HEAR THE TORNADO. IT MAY BE TOO LATE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SUNDAY MORNING FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA. LAT...LON 4303 9650 4293 9643 4304 9596 4323 9613 $$ MJF
2 follow-up statements
000 WWUS53 KFSD 050354 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1053 PM CDT SAT JUN 4 2005 IAC167-050415- /O.CON.KFSD.TO.W.0006.000000T0000Z-050605T0415Z/ SIOUX IA- 1053 PM CDT SAT JUN 4 2005 ...A TORNADO WARNING CONTINUES UNTIL 1115 PM CDT FOR SIOUX COUNTY... AT 1053 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A STRONG ROTATION INDICATING A DEVELOPING TORNADO. THIS TORNADO WAS LOCATED 7 MILES SOUTHEAST OF ROCK VALLEY...MOVING NORTHEAST AT 25 MPH. THIS CELL HAS PRODUCED SEVERAL BRIEF TORNADO TOUCHDOWNS IN ITS HISTORY. TAKE COVER NOW. TORNADOES AT NIGHT ARE EXTREMELY DANGEROUS. DO NOT WAIT UNTIL YOU SEE OR HEAR THE TORNADO. IT MAY BE TOO LATE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SUNDAY MORNING FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA. LAT...LON 4317 9641 4311 9631 4317 9604 4325 9616 $$ MJF
000 WWUS53 KFSD 050412 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1112 PM CDT SAT JUN 4 2005 IAC167-050422- /O.EXP.KFSD.TO.W.0006.000000T0000Z-050605T0415Z/ SIOUX IA- 1112 PM CDT SAT JUN 4 2005 ...THE TORNADO WARNING FOR SIOUX COUNTY EXPIRES AT 1115 PM CDT... THE WARNING HAS EXPIRED. THE STORM IS NO LONGER SEVERE. HOWEVER A NEW CELL HAS DEVELOPED IN NORTHWEST SIOUX COUNTY AND WILL BE MONITORED CLOSELY FOR SEVERE DEVELOPMENT. A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SUNDAY MORNING FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA. LAT...LON 4317 9641 4311 9631 4317 9604 4325 9616 $$ MJF
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 9:49 PM CDT | Tornado Warning | FSD | Plymouth, Sioux | 29 min |
| Jun 4, 10:14 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 46 min |
| Jun 4, 11:05 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 20 min |
| Jun 4, 11:55 PM CDT | Flash Flood Warning | FSD | Lyon, Sioux | 3 hr |
| Jun 5, 12:02 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 29 min |
| Jun 5, 5:15 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 39 min |
Nearby
Tornado Warnings in Iowa, 2005Every tornado warning in 2005Tornadoes in 2005
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.