Alert archive / Iowa / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 27, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Apr 18, 2002, 4:57 PM CDT for Chickasaw County, Iowa. It was in force for 63 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 18, 2002, 4:57 PM CDT (21:57 UTC)
- Expired
- Apr 18, 2002, 6:00 PM CDT
- In force
- 63 min
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
County Chickasaw County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 18, 5:03 PM CDT | Hail 1 | Ionia, IA | |
| Apr 18, 5:06 PM CDT | Hail 1.75 | Ionia, IA | |
| Apr 18, 5:14 PM CDT | Hail 1.75 | Ionia, IA | |
| Apr 18, 5:29 PM CDT | Hail 1.75 | New Hampton, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 18, 4:15 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.0 hours before the alert went out and 213 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
- 1064 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 745 m²/s²
- 0-3 km storm-relative helicity
- 912 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KARX 182157 SVRLSE IAC037-182300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 457 PM CDT THU APR 18 2002 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHICKASAW COUNTY IN NORTHEAST IOWA * UNTIL 600 PM CDT * AT 457 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES WEST OF IONIA...OR ABOUT 6 MILES EAST OF CHARLES CITY...MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM IS EXPECTED TO BE... OVER RURAL CHICKASAW COUNTY AT 510 PM CDT A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR WESTERN WISCONSIN. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM CDT THURSDAY EVENING FOR NORTHEASTERN IOWA AND SOUTHEAST MINNESOTA AND WEST CENTRAL WISCONSIN. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND GUSTS IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. LAT...LON 4314 9257 4293 9257 4321 9206 4322 9245 KRC
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 1:30 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 30 min |
| Apr 18, 1:47 AM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 58 min |
| Apr 18, 2:22 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 38 min |
| Apr 18, 2:48 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 42 min |
| Apr 18, 2:50 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 55 min |
| Apr 18, 2:58 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 47 min |
| Apr 18, 3:29 AM CDT | Severe Thunderstorm Warning | ARX | Howard | 46 min |
| Apr 18, 3:49 AM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 56 min |
| Apr 18, 4:01 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 44 min |
| Apr 18, 4:31 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 44 min |
| Apr 18, 5:25 PM CDT | Tornado Warning | ARX | Chickasaw | 50 min |
| Apr 18, 5:49 PM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 56 min |
| Apr 18, 5:53 PM CDT | Tornado Warning | ARX | Howard, Winneshiek | 67 min |
| Apr 18, 6:31 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 59 min |
| Apr 18, 6:34 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 41 min |
| Apr 18, 6:49 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 56 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.