Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 365, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 22, 2002, 3:25 AM CDT for Douglas County, South Dakota. It was in force for 35 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 22, 2002, 3:25 AM CDT (08:25 UTC)
- Expired
- Aug 22, 2002, 4:00 AM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Douglas County, SD
The radar
The Sioux Falls radar (KFSD), 134 km from the middle of the area, began a volume at 08:24 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, 3:52 AM CDT | Thunderstorm Wind 52 E | Delmont, SD | |
| Aug 22, 3:52 AM CDT | Hail 0.75 | Delmont, 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, 8.4 hours before the alert went out and 168 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.
590 WUUS53 KFSD 220825 SVRFSD SDC043-220900- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 325 AM CDT THU AUG 22 2002 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DOUGLAS COUNTY IN SOUTHEAST SOUTH DAKOTA * UNTIL 400 AM CDT * AT 325 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTHWEST OF ARMOUR...OR ABOUT 15 MILES NORTHEAST OF LAKE ANDES...MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ARMOUR AROUND 330 AM CDT DELMONT AROUND 350 AM CDT THIS STORM WILL PRODUCE LARGE HAIL. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS.
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, 4:01 AM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 44 min |
| Aug 22, 4:40 AM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 35 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.