Alert archive / Iowa / Tornado Warnings in 2007
Tornado Warning 40, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 4, 2007, 7:14 PM CDT for Buena Vista County, Cherokee 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
- Aug 4, 2007, 7:14 PM CDT (00:14 UTC)
- Expired
- Aug 4, 2007, 8:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
Counties Buena Vista County, IA, Cherokee County, IA
The radar
The Sioux Falls radar (KFSD), 130 km from the middle of the area, began a volume at 00:16 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 4, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.2 hours before the alert went out and 182 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
- 1034 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 1889 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 050015 TORFSD IAC021-035-050100- /O.NEW.KFSD.TO.W.0040.070805T0014Z-070805T0100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 714 PM CDT SAT AUG 4 2007 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN BUENA VISTA COUNTY IN NORTHWEST IOWA NORTHEASTERN CHEROKEE COUNTY IN NORTHWEST IOWA * UNTIL 800 PM CDT * AT 714 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES SOUTHWEST OF LARRABEE...OR ABOUT 24 MILES NORTHWEST OF STORM LAKE...MOVING EAST AT 20 MPH. * THE TORNADO WILL BE NEAR... LARRABEE...CHEROKEE AROUND 720 PM CDT... LINN GROVE AROUND 755 PM CDT... A ROTATING WALL CLOUD HAS BEEN REPORTED BY SPOTTERS WITH THIS STORM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY EVENING FOR NORTHWEST IOWA. LAT...LON 4290 9572 4275 9571 4269 9521 4291 9520 $$ JM
2 follow-up statements
000 WWUS53 KFSD 050041 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 739 PM CDT SAT AUG 4 2007 IAC021-035-050100- /O.CON.KFSD.TO.W.0040.000000T0000Z-070805T0100Z/ CHEROKEE IA-BUENA VISTA IA- 739 PM CDT SAT AUG 4 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR NORTHWESTERN BUENA VISTA AND NORTHEASTERN CHEROKEE COUNTIES... AT 739 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A STORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED 4 MILES SOUTHEAST OF LARRABEE...OR ABOUT 19 MILES NORTHWEST OF STORM LAKE...MOVING EAST AT 20 MPH. THE STORM WILL BE NEAR... RURAL CHEROKEE COUNTY THROUGH 750 PM CDT RURAL BUENA VISTA COUNTY THROUGH 750 PM CDT A ROATATING WALL CLOUD HAS BEEN REPORTED BY TRAINED SPOTTERS WITH THIS STORM. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY EVENING FOR NORTHWEST IOWA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY EVENING FOR NORTHWEST IOWA. LAT...LON 4289 9567 4275 9567 4268 9522 4289 9520 $$ JM
000 WWUS53 KFSD 050059 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 759 PM CDT SAT AUG 4 2007 IAC021-035-050109- /O.EXP.KFSD.TO.W.0040.000000T0000Z-070805T0100Z/ CHEROKEE IA-BUENA VISTA IA- 759 PM CDT SAT AUG 4 2007 ...THE TORNADO WARNING FOR NORTHWESTERN BUENA VISTA AND NORTHEASTERN CHEROKEE COUNTIES EXPIRES AT 800 PM CDT... THE STORM IS NO LONGER SEVERE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY EVENING FOR NORTHWEST IOWA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM CDT SATURDAY EVENING FOR NORTHWEST IOWA. LAT...LON 4289 9567 4275 9567 4268 9522 4289 9520 $$ JM
Nearby
Tornado Warnings in Iowa, 2007Every tornado warning in 2007Tornadoes in 2007
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.