Alert archive / Iowa / Tornado Warnings in 2003
Tornado Warning 4, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Jul 7, 2003, 3:48 AM CDT for Chickasaw County, Iowa. It was in force for 42 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 7, 2003, 3:48 AM CDT (08:48 UTC)
- Expired
- Jul 7, 2003, 4:30 AM CDT
- In force
- 42 min
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
County Chickasaw County, IA
The radar
The La Crosse radar (KARX), 125 km from the middle of the area, began a volume at 08:50 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 |
|---|---|---|---|
| Jul 7, 2:40 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 8.8 hours before the alert went out and 219 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
- 2301 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KARX 070848 TORARX IAC037-070930- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 348 AM CDT MON JUL 7 2003 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... CHICKASAW COUNTY IN NORTHEAST IOWA * UNTIL 430 AM CDT * AT 348 AM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A TORNADO 5 MILES SOUTHWEST OF ALTA VISTA...OR ABOUT 11 MILES NORTHEAST OF CHARLES CITY...MOVING SOUTHEAST AT 30 MPH. * THE TORNADO IS EXPECTED TO BE... NEAR DEVON...AND NORTH WASHINGTON AT 355 AM CDT... NEAR NEW HAMPTON...AND REPUBLIC AT 405 AM CDT... NEAR BOYD...AND SAUDE AT 410 AM CDT... NEAR LAWLER...AND LITTLE TURKEY AT 420 AM CDT... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR LAT...LON 4321 9255 4292 9255 4292 9209 4321 9209 $$ THOMPSON
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 1:45 AM CDT | Severe Thunderstorm Warning | ARX | Floyd | 60 min |
| Jul 7, 2:18 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 57 min |
| Jul 7, 2:27 AM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 48 min |
| Jul 7, 3:09 AM CDT | Flash Flood Warning | ARX | Mitchell | 111 min |
| Jul 7, 3:18 AM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 42 min |
| Jul 7, 4:06 AM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 39 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.