Alert archive / Iowa / Tornado Warnings in 2002
Tornado Warning 5, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 20, 2002, 9:05 PM CDT for Woodbury County, Iowa. It was in force for 25 min. 1 report 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 20, 2002, 9:05 PM CDT (02:05 UTC)
- Expired
- Jun 20, 2002, 9:30 PM CDT
- In force
- 25 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Woodbury County, IA
The radar
The Omaha radar (KOAX), 120 km from the middle of the area, began a volume at 02:05 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 20, 9:10 PM CDT | Tornado F0 | Climbing Hill, IA | A tornado caused tree damage along a five mile long path. |
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 20, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 121 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
- 1337 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1609 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 210205 TORFSD IAC193-210230- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 904 PM CDT THU JUN 20 2002 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... WOODBURY COUNTY IN NORTHWEST IOWA * UNTIL 930 PM CDT * AT 904 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 8 MILES WEST OF ANTHON...OR ABOUT 10 MILES SOUTH OF MOVILLE...MOVING EAST AT 10 MPH. * THE TORNADO WILL BE NEAR... ANTHON AROUND 930 PM CDT AN OFF-DUTY NATIONAL WEATHER SERVICE EMPLOYEE REPORTED A FUNNEL CLOUD NEAR CLIMBING HILL AT 904 PM. THIS REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED. IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY. LAT...LON 4243 9619 4225 9615 4227 9579 4249 9582
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 8:27 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 33 min |
| Jun 20, 8:56 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 34 min |
| Jun 20, 9:41 PM CDT | Flash Flood Warning | FSD | Woodbury | 49 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.