Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 160, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 25, 1997, 5:22 PM MDT for Corson County, South Dakota. It was in force for 63 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 25, 1997, 5:22 PM MDT (23:22 UTC)
- Expired
- Jul 25, 1997, 6:25 PM MDT
- In force
- 63 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Corson County, SD
The radar
The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 23:24 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 25, 5:22 PM MDT | Hail 1.75 | Keldron, SD | The storm left a 5 mile long path of hail damage destroying many acres of 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.4 hours before the alert went out and 124 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
- 655 J/kg
- Mixed-layer CIN
- -252 J/kg
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 42 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.
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 25, 9:40 AM MDT, 7 hours 42 minutes earlier.
Area forecast discussion, Jul 25, 9:40 AM MDT, 7 hours 42 minutes before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD AND FOR TRAVERSE/BIG STONE COUNTIES OF MN NATIONAL WEATHER SERVICE ABERDEEN SD 1040 AM CDT FRI JUL 25 1997 HAVE UPDATED ZONE PACKAGE TO REMOVE MORNING WEATHER. ALSO UPPED HIGHS IN CENTRAL ZONES AROUND PIR. WEAK PRESSURE GRADIENTS AT SFC UP TO 850 MB ...SO WILL FCST VARIABLE WINDS OVER ENTIRE CWA. .ABR...NONE MIDDLEBROOKE
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:36 PM MDT | Severe Thunderstorm Warning | ABR | Jones | 64 min |
| Jul 24, 8:07 PM MDT | Severe Thunderstorm Warning | ABR | Clark, Spink | 63 min |
| Jul 24, 8:45 PM MDT | Tornado Warning | ABR | Clark | 30 min |
| Jul 24, 8:51 PM MDT | Severe Thunderstorm Warning | ABR | Codington, Hamlin | 94 min |
| Jul 24, 10:21 PM MDT | Severe Thunderstorm Warning | ABR | Lyman | 34 min |
| Jul 24, 11:07 PM MDT | Severe Thunderstorm Warning | ABR | Hamlin | 48 min |
| Jul 24, 11:14 PM MDT | Flash Flood Warning | ABR | Clark, Codington, Deuel, Hamlin | 3 hr |
| Jul 25, 3:37 PM MDT | Severe Thunderstorm Warning | ABR | Campbell, McPherson | 58 min |
| Jul 25, 3:51 PM MDT | Tornado Warning | ABR | McPherson | 44 min |
| Jul 25, 4:37 PM MDT | Tornado Warning | ABR | Edmunds, McPherson | 58 min |
| Jul 25, 5:36 PM MDT | Severe Thunderstorm Warning | ABR | Edmunds | 64 min |
| Jul 25, 5:45 PM MDT | Tornado Warning | ABR | Edmunds | 50 min |
| Jul 25, 5:56 PM MDT | Tornado Warning | ABR | Brown | 34 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.