Alert archive / Iowa / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 71, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jul 31, 2003, 8:22 PM CDT for Winneshiek County, Iowa. It was in force for 53 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, 8:22 PM CDT (01:22 UTC)
- Expired
- Jul 31, 2003, 9:15 PM CDT
- In force
- 53 min
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
County Winneshiek County, IA
The radar
The La Crosse radar (KARX), 88 km from the middle of the area, began a volume at 01:25 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 31, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 212 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.
835
WUUS53 KARX 010122
SVRARX
IAC191-010215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
822 PM CDT THU JUL 31 2003
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WINNESHIEK COUNTY IN NORTHEAST IOWA
* UNTIL 915 PM CDT
* AT 822 PM CDT...WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM
OVER RIDGEWAY...OR ABOUT 9 MILES WEST OF DECORAH...MOVING SOUTHEAST
AT 15 MPH.
* THE SEVERE THUNDERSTORM IS EXPECTED TO BE...
NEAR SPILLVILLE AT 830 PM CDT...
NEAR CONOVER AT 835 PM CDT...
NEAR CALMAR...AND DECORAH AT 845 PM CDT...
NEAR NORDNESS AT 850 PM CDT...
NEAR OSSIAN AT 900 PM CDT...
QUARTER-SIZED HAIL WAS REPORTED NEAR RIDGEWAY WITH THIS STORM. LARGE
DESTRUCTIVE HAIL IS THE MAIN THREAT WITH THESE STORMS. FOR YOUR
PROTECTION...SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM
WINDOWS.
LAT...LON 4321 9209 4330 9209 4340 9203 4329 9161
4308 9160 4308 9177
$$
BAUMGARDT
&The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 7:23 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Winneshiek | 52 min |
| Jul 31, 9:00 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd | 75 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2003Every severe thunderstorm warning 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.