Alert archive / South Dakota / Tornado Warnings in 1989
Tornado Warning 6, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Aug 21, 1989, 5:05 PM CDT for Hamlin County, South Dakota. It was in force for 25 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1989, 5:05 PM CDT (22:05 UTC)
- Expired
- Aug 21, 1989, 5:30 PM CDT
- In force
- 25 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Hamlin County, SD
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 10.1 hours before the alert went out and 284 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
- 2 J/kg
- Mixed-layer CIN
- -374 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 10:43 PM CDT | Severe Thunderstorm Warning | ABR | Hand, Spink | 62 min |
| Aug 21, 3:53 PM CDT | Severe Thunderstorm Warning | ABR | Hamlin, Kingsbury | 67 min |
Nearby
Tornado Warnings in South Dakota, 1989Every tornado warning in 1989Tornadoes in 1989
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.