Alert archive / Iowa / Tornado Warnings in 2002
Tornado Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 19, 2002, 9:53 PM CDT for Sioux County, Iowa. It was in force for 22 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
- Jun 19, 2002, 9:53 PM CDT (02:53 UTC)
- Expired
- Jun 19, 2002, 10:15 PM CDT
- In force
- 22 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Sioux County, IA
The radar
The Sioux Falls radar (KFSD), 83 km from the middle of the area, began a volume at 02:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 19, 10:00 PM CDT | Hail 0.88 | Maurice, IA | |
| Jun 19, 10:00 PM CDT | Thunderstorm Wind 52 E | Maurice, IA | Thunderstorm winds blew down tree branches and corn crops. The amount of tree and crop damage was not known. |
| Jun 19, 10:05 PM CDT | Hail 0.75 | Alton, IA | |
| Jun 19, 10:05 PM CDT | Thunderstorm Wind 61 E | Alton, 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 |
|---|---|---|---|
| Jun 19, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.9 hours before the alert went out and 187 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
- 1342 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 2359 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 200253 TORFSD IAC167-200315- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 952 PM CDT WED JUN 19 2002 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN SIOUX COUNTY IN NORTHWEST IOWA * UNTIL 1015 PM CDT * AT 952 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 8 MILES SOUTHWEST OF ORANGE CITY...OR ABOUT 8 MILES NORTH OF LE MARS...MOVING EAST AT 25 MPH. * THE TORNADO WILL BE NEAR... CARNES AROUND 1005 PM CDT THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. TAKE COVER NOW. LAT...LON 4305 9625 4292 9622 4290 9589 4305 9588
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 8:38 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 22 min |
| Jun 19, 9:12 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 33 min |
| Jun 19, 9:29 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 31 min |
| Jun 19, 9:37 PM CDT | Tornado Warning | FSD | Plymouth | 23 min |
| Jun 19, 10:00 PM CDT | Tornado Warning | FSD | Plymouth | 15 min |
Nearby
Tornado Warnings in Iowa, 2002Every tornado warning in 2002Tornadoes 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; radar from the NEXRAD Level II archive.