Alert archive / South Dakota / Tornado Warnings in 1999
Tornado Warning 13, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Jul 8, 1999, 12:20 AM CDT for Edmunds County, South Dakota. It was in force for 30 min. 1 report 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
- Jul 8, 1999, 12:20 AM CDT (05:20 UTC)
- Expired
- Jul 8, 1999, 12:50 AM CDT
- In force
- 30 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Edmunds County, SD
The radar
The Aberdeen radar (KABR), 63 km from the middle of the area, began a volume at 05:20 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 |
|---|---|---|---|
| Jul 8, 12:30 AM CDT | Thunderstorm Wind 52 | Mina, SD | Winds to 60 mph brought numerous power lines down throughout Mina. |
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, 5.3 hours before the alert went out and 86 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
- 22 J/kg
- Mixed-layer CIN
- -361 J/kg
- Mixed-layer LCL
- 2040 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KABR 080520 RRA TORABR SDC045-080550- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 1220 AM CDT THU JUL 8 1999 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * TORNADO WARNING FOR... EDMUNDS COUNTY IN NORTHEASTERN SOUTH DAKOTA * UNTIL 1250 AM CDT * AT 1217 AM CDT... ABERDEEN DOPPLER RADAR INDICATED A TORNADO 16 MILES WEST OF ABERDEEN OR 7 MILES NORTH OF MINA LAKE MOVING EAST AT 25 MPH. * THE TORNADO WILRL BE NEAR... MINA LAKE AT 1225 AM GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! KH/RE
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 10:08 PM CDT | Severe Thunderstorm Warning | ABR | Corson | 32 min |
| Jul 7, 10:19 PM CDT | Severe Thunderstorm Warning | ABR | Campbell | 36 min |
| Jul 7, 11:19 PM CDT | Severe Thunderstorm Warning | ABR | Campbell, McPherson | 31 min |
| Jul 7, 11:50 PM CDT | Tornado Warning | ABR | McPherson | 35 min |
| Jul 8, 12:22 AM CDT | Tornado Warning | ABR | Brown | 48 min |
| Jul 8, 12:24 AM CDT | Tornado Warning | ABR | McPherson | 36 min |
| Jul 8, 1:28 AM CDT | Flash Flood Warning | ABR | McPherson | 4 hr |
| Jul 8, 1:46 AM CDT | Severe Thunderstorm Warning | ABR | Brown | 64 min |
| Jul 8, 2:43 AM CDT | Severe Thunderstorm Warning | ABR | Day | 62 min |
Nearby
Tornado Warnings in South Dakota, 1999Every tornado warning in 1999Tornadoes in 1999
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.