Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 129, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 18, 1997, 12:47 AM CDT for Hand County, Hyde County, South Dakota. It was in force for 48 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
- Jul 18, 1997, 12:47 AM CDT (05:47 UTC)
- Expired
- Jul 18, 1997, 1:35 AM CDT
- In force
- 48 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
Counties Hand County, SD, Hyde County, SD
The radar
The Aberdeen radar (KABR), 120 km from the middle of the area, began a volume at 05:47 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 18, 1:10 AM CDT | Hail 0.75 | Miller, SD | |
| Jul 18, 1:30 AM CDT | Thunderstorm Wind 65 | Highmore, 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, 5.8 hours before the alert went out and 77 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
- 2315 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1528 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 8:47 PM CDT, 4 hours earlier.
Area forecast discussion, Jul 17, 8:47 PM CDT, 4 hours before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD AND FOR TRAVERSE/BIG STONE COUNTIES OF MN NATIONAL WEATHER SERVICE ABERDEEN SD 847 PM CDT THU JUL 17 1997 WITH SOME TSRAS SPREADING NE FROM NW NEB LATE THIS EVENING...JONES AND LYMAN COUNTIES WILL HAVE A POSSIBILITY OF TSRAS AND THEY WILL ALSO HAVE A CHC LATER AS SCT TSRAS SPREAD IN FROM THE WEST. SO WILL ADD SOME POPS TO JONES AND LYMAN COUNTIES. WILL TAKE OUT MENTION OF WDLY SCT TSRAS FOR THIS EVENING IN NE SD ZONES WITH TSRAS LIKELY AFTER MIDNIGHT. LINE OF STORMS IN E MT SHOULD MOVE SE ACROSS PARTS OF C AND NE SD AND WC MN LATER TONIGHT. WILL UPDATE THESE AREAS. .ABR...NONE DM
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 2:05 AM CDT | Severe Thunderstorm Warning | ABR | Faulk, Spink | 50 min |
| Jul 18, 2:58 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Spink | 62 min |
| Jul 18, 3:20 AM CDT | Severe Thunderstorm Warning | ABR | Brown, Day | 50 min |
| Jul 18, 3:24 AM CDT | Tornado Warning | ABR | Clark | 31 min |
| Jul 18, 3:38 AM CDT | Severe Thunderstorm Warning | ABR | Codington | 62 min |
| Jul 18, 3:50 AM CDT | Tornado Warning | ABR | Day | 30 min |
| Jul 18, 4:12 AM CDT | Severe Thunderstorm Warning | ABR | Grant | 48 min |
| Jul 18, 4:34 AM CDT | Severe Thunderstorm Warning | ABR | Deuel | 36 min |
| Jul 18, 5:01 AM CDT | Severe Thunderstorm Warning | ABR | Grant | 24 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1997Every severe thunderstorm warning in 1997
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.