Alert archive / Iowa / Tornado Warnings in 2003
Tornado Warning 27, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Jul 31, 2003, 11:04 PM CDT for Butler County, Franklin County, Iowa. It was in force for 26 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
- Jul 31, 2003, 11:04 PM CDT (04:04 UTC)
- Expired
- Jul 31, 2003, 11:30 PM CDT
- In force
- 26 min
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Butler County, IA, Franklin County, IA
The radar
The Des Moines radar (KDMX), 136 km from the middle of the area, began a volume at 04:07 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
Davenport, (KDVN), launched 00:00Z, 4.1 hours before the alert went out and 232 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
- 857 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 1878 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
846 WFUS53 KDMX 010404 TORDMX IAC023-069-010430- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1103 PM CDT THU JUL 31 2003 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... BUTLER COUNTY IN NORTH CENTRAL IOWA EASTERN FRANKLIN COUNTY IN NORTH CENTRAL IOWA * UNTIL 1130 PM CDT * AT 1057 PM...RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES NORTH OF AREDALE...OR ABOUT 16 MILES SOUTHEAST OF MASON CITY...MOVING SOUTHEAST AT 35 MPH. * THE STORM WILL BE... 5 MILES NORTHEAST OF AREDALE AROUND 1110 PM... 6 MILES SOUTHWEST OF GREENE AROUND 1115 PM... 4 MILES NORTHEAST OF BRISTOW AROUND 1120 PM... NEAR ALLISON MUNICIPAL AIRPORT AROUND 1125 PM AND 5 MILES SOUTHWEST OF CLARKSVILLE AROUND 1130 PM. AT 1103 PM A WEATHER SPOTTER REPORTED TENNIS BALL SIZED HAIL BREAKING OUT WINDOWS AND DAMAGING SIDING IN ROCKWELL. 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. LAT...LON 4292 9258 4291 9335 4255 9315 4256 9258 $$ SMALL
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 9:45 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 45 min |
| Jul 31, 10:06 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 54 min |
| Jul 31, 10:31 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 44 min |
| Jul 31, 10:51 PM CDT | Tornado Warning | DMX | Cerro Gordo | 24 min |
| Jul 31, 11:44 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 46 min |
| Jul 31, 11:58 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 32 min |
| Aug 1, 1:13 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Wapello | 32 min |
Nearby
Tornado Warnings in Iowa, 2003Every tornado warning in 2003Tornadoes in 2003
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.