Alert archive / South Dakota / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 655
The Storm Prediction Center issued this severe thunderstorm watch at Aug 29, 2002, 3:40 PM MDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2002, 3:40 PM MDT (21:40 UTC)
- Expired
- Aug 29, 2002, 10:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Carter County, MT, Powder River County, MT, Rosebud County, MT, Bowman County, ND, Butte County, SD, Custer County, SD, Harding County, SD, Lawrence County, SD, Pennington County, SD, Campbell County, WY, Crook County, WY, Weston County, WY
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 4:22 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 53 min |
| Aug 29, 6:37 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 38 min |
| Aug 29, 7:01 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 59 min |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.7 hours before the alert went out and 379 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
- 324 J/kg
- Mixed-layer CIN
- -237 J/kg
- Mixed-layer LCL
- 1208 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 1:05 PM MDT | Severe Thunderstorm Watch | SPC | Carbon, Sweetwater | 7 hr |
| Aug 29, 1:30 PM MDT | Severe Thunderstorm Watch | SPC | Big Horn, Fremont, Hot Springs, Natrona, Park, Washakie | 7 hr |
| Aug 29, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | Goshen, Laramie, Platte | 7 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 2002Severe Thunderstorm Watches in Montana, 2002Severe Thunderstorm Watches in Wyoming, 2002Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive.