Alert archive / Iowa / Tornado Warnings in 2007
Tornado Warning 52, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Sep 30, 2007, 6:47 PM CDT for Calhoun County, Pocahontas County, Iowa. It was in force for 15 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
- Sep 30, 2007, 6:47 PM CDT (23:47 UTC)
- Expired
- Sep 30, 2007, 7:02 PM CDT
- In force
- 15 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Calhoun County, IA, Pocahontas County, IA
The radar
The Des Moines radar (KDMX), 122 km from the middle of the area, began a volume at 23:51 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 |
|---|---|---|---|
| Sep 30, 1:02 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 192 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1296 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 450 m²/s²
- 0-3 km storm-relative helicity
- 472 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KDMX 302347 TORDMX IAC025-151-010030- /O.NEW.KDMX.TO.W.0052.070930T2347Z-071001T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 647 PM CDT SUN SEP 30 2007 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN POCAHONTAS COUNTY IN NORTHWEST IOWA... WESTERN CALHOUN COUNTY IN WEST CENTRAL IOWA... * UNTIL 730 PM CDT. * AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ROCKWELL CITY...OR ABOUT 29 MILES WEST OF FORT DODGE...MOVING NORTH AT 25 MPH. * THE TORNADO WILL BE NEAR... 6 MILES WEST OF MANSON BY 710 PM CDT... THIS IS A HAZARDOUS SITUATION. SEEK SHELTER IN A BASEMENT...OR IN AN INTERIOR ROOM. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE OR IN A CAR...SEEK SHELTER IN A REINFORCED BUILDING. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR WESTERN IOWA. LAT...LON 4271 9485 4269 9445 4226 9463 4234 9485 TIME...MOT...LOC 2347Z 194DEG 24KT 4239 9470 $$ DONAVON
1 follow-up statement
000 WWUS53 KDMX 010002 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 702 PM CDT SUN SEP 30 2007 IAC025-151-010012- /O.CAN.KDMX.TO.W.0052.000000T0000Z-071001T0030Z/ POCAHONTAS IA-CALHOUN IA- 702 PM CDT SUN SEP 30 2007 ...THE TORNADO WARNING FOR WESTERN CALHOUN AND SOUTHERN POCAHONTAS COUNTIES IS CANCELLED... AT 659 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELLED. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR WESTERN IOWA. LAT...LON 4271 9485 4269 9445 4226 9463 4234 9485 TIME...MOT...LOC 0002Z 194DEG 24KT 4249 9467 $$ DONAVON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 4:29 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 31 min |
| Sep 30, 4:38 PM CDT | Severe Thunderstorm Warning | DMX | Union | 27 min |
| Sep 30, 4:43 PM CDT | High Wind Warning | DMX | Adair, Adams, Audubon, Carroll, Cass, Clarke and 8 more | 3 hr |
| Sep 30, 4:49 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Warren | 56 min |
| Sep 30, 5:21 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 24 min |
| Sep 30, 5:23 PM CDT | Tornado Warning | DMX | Clarke, Lucas | 24 min |
| Sep 30, 5:25 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 50 min |
| Sep 30, 5:33 PM CDT | Tornado Warning | DMX | Marion, Warren | 42 min |
| Sep 30, 6:03 PM CDT | Severe Thunderstorm Warning | DMX | Jasper | 57 min |
| Sep 30, 6:03 PM CDT | Tornado Warning | DMX | Sac | 15 min |
| Sep 30, 6:17 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 43 min |
| Sep 30, 6:18 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Poweshiek | 42 min |
| Sep 30, 6:21 PM CDT | Tornado Warning | DMX | Calhoun, Pocahontas, Sac | 24 min |
| Sep 30, 6:21 PM CDT | Tornado Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 39 min |
| Sep 30, 6:37 PM CDT | Tornado Warning | DMX | Poweshiek | 38 min |
| Sep 30, 6:54 PM CDT | Tornado Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 26 min |
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.