Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 367, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 22, 2002, 4:40 AM CDT for Hutchinson County, South Dakota. It was in force for 35 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
- Aug 22, 2002, 4:40 AM CDT (09:40 UTC)
- Expired
- Aug 22, 2002, 5:15 AM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Hutchinson County, SD
The radar
The Sioux Falls radar (KFSD), 89 km from the middle of the area, began a volume at 09:40 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 |
|---|---|---|---|
| Aug 22, 5:00 AM CDT | Hail 0.75 | Olivet, SD |
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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 9.7 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
- 619 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 532 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
216 WUUS53 KFSD 220940 SVRFSD SDC067-221015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 439 AM CDT THU AUG 22 2002 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HUTCHINSON COUNTY IN SOUTHEAST SOUTH DAKOTA * UNTIL 515 AM CDT * AT 439 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 14 MILES WEST OF MENNO...OR ABOUT 32 MILES SOUTH OF MITCHELL...MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OLIVET AROUND 500 AM CDT MENNO AROUND 510 AM CDT THIS EXTENDS THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR HUTCHINSON COUNTY. THIS STORM WILL PRODUCE LARGE HAIL UP TO QUARTER SIZE...AS WELL AS WINDS TO 60 MPH. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. LAT...LON 4335 9792 4326 9795 4317 9749 4331 9746
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:45 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 30 min |
| Aug 21, 11:35 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Jerauld | 40 min |
| Aug 21, 11:41 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Jerauld | 34 min |
| Aug 22, 12:16 AM CDT | Severe Thunderstorm Warning | FSD | Aurora | 29 min |
| Aug 22, 12:19 AM CDT | Severe Thunderstorm Warning | FSD | Aurora | 26 min |
| Aug 22, 1:04 AM CDT | Severe Thunderstorm Warning | FSD | Davison | 26 min |
| Aug 22, 3:25 AM CDT | Severe Thunderstorm Warning | FSD | Douglas | 35 min |
| Aug 22, 4:01 AM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 44 min |
| Aug 22, 6:09 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 36 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 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; radar from the NEXRAD Level II archive.