Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 244, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 9, 2002, 5:27 PM CDT for Gregory County, South Dakota. It was in force for 33 min. 5 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
- Aug 9, 2002, 5:27 PM CDT (22:27 UTC)
- Expired
- Aug 9, 2002, 6:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Gregory County, SD
The radar
The North Platte radar (KLNX), 166 km from the middle of the area, began a volume at 22:27 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 9, 5:30 PM CDT | Hail 0.75 | Dallas, SD | |
| Aug 9, 5:45 PM CDT | Thunderstorm Wind 65 E | Herrick, SD | Thunderstorm winds caused damage to trees and power lines. |
| Aug 9, 5:45 PM CDT | Tornado F2 | Herrick, SD | A tornado destroyed a church, a county highway shop, several garages, several small sheds, a mobile home, a camper, and a ten thousand bushel silo. The church was ripped from its foundation, with debris and contents blown over a wide area. Tree damage includes |
| Aug 9, 5:50 PM CDT | Hail 1.5 | Herrick, SD | Large hail, driven by severe winds, broke windows in vehicles and buildings, and cause other damage to vehicles. A man was slightly injured when he was hit by hail while sitting in his pickup, after the hail had broken the window. Some area crops, already desc |
| Aug 9, 5:56 PM CDT | Hail 1.5 | Burke, SD | Large hail caused an unknown amount of damage to windows, vehicles, and crops. |
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 12:00Z, 10.5 hours before the alert went out and 209 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
- 20 J/kg
- Mixed-layer CIN
- -386 J/kg
- Mixed-layer LCL
- 1144 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
676 WUUS53 KFSD 092227 SVRFSD SDC053-092300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 526 PM CDT FRI AUG 9 2002 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA * UNTIL 600 PM CDT * AT 526 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES SOUTHWEST OF BURKE...OR ABOUT 26 MILES SOUTHEAST OF WINNER...MOVING EAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... BURKE AROUND 540 PM CDT HERRICK AROUND 545 PM CDT THIS STORM WILL PRODUCE LARGE HAIL AND DAMAGING WIND. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. LAT...LON 4316 9966 4299 9958 4314 9885 4329 9904
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 5:23 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Jerauld | 22 min |
| Aug 9, 5:56 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Sanborn | 34 min |
| Aug 9, 5:59 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 46 min |
| Aug 9, 6:11 PM CDT | Tornado Warning | FSD | Davison, Sanborn | 34 min |
| Aug 9, 6:46 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 44 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.