Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 142, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 19, 1997, 9:30 PM CDT for Grant County, Roberts County, South Dakota. It was in force for 45 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 19, 1997, 9:30 PM CDT (02:30 UTC)
- Expired
- Jul 19, 1997, 10:15 PM CDT
- In force
- 45 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
Counties Grant County, SD, Roberts County, SD
The radar
The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 02:30 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 19, 9:38 PM CDT | Hail 1.75 | Wilmot, SD | |
| Jul 19, 9:38 PM CDT | Hail 4 | Wilmot, SD | The four inch size hail busted a few windshields. |
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, 2.5 hours before the alert went out and 133 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
- 2323 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1325 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.7
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 19, 9:05 PM CDT, 25 minutes earlier.
Area forecast discussion, Jul 19, 9:05 PM CDT, 25 minutes before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD AND FOR TRAVERSE/BIG STONE COUNTIES OF MN NATIONAL WEATHER SERVICE ABERDEEN SD 903 PM CDT SAT JUL 19 1997 BEST CHANCES OF TSRAS LATE THIS EVENING HAVE MOVED SOUTH OF MOBRIDGE...ABERDEEN...GETTYSBURG AS NORTH TO NORTHEAST WINDS PUSH IN SOME DRIER AND COOLER AIR. AREA OF -SHRAS ACROSS NC SD WILL BE ENDING BY MIDNIGHT. LEFT CHANCES IN AREAS WHERE OUTFLOW BNDRY AND COOL FRONT STILL MAY KICK OFF SOME TSRAS FROM PIERRE THROUGH WATERTOWN TO WHEATON. ALSO MADE ADJ TO WIND FORECAST. .ABR...NONE DM
In the hours before
Special weather statement, Jul 19, 3:30 PM CDT, 6 hours before
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Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 9:26 PM CDT | Severe Thunderstorm Warning | ABR | Roberts | 49 min |
| Jul 19, 9:42 PM CDT | Tornado Warning | ABR | Grant | 33 min |
| Jul 20, 2:22 AM CDT | Severe Thunderstorm Warning | ABR | Hand | 48 min |
| Jul 20, 3:31 AM CDT | Severe Thunderstorm Warning | ABR | Spink | 49 min |
| Jul 20, 4:13 AM CDT | Severe Thunderstorm Warning | ABR | Day | 62 min |
| Jul 20, 5:27 AM CDT | Severe Thunderstorm Warning | ABR | Roberts | 63 min |
| Jul 19, 8:55 PM CDT | Severe Thunderstorm Warning | ABR | Big Stone | 65 min |
| Jul 20, 5:58 AM CDT | Severe Thunderstorm Warning | ABR | Big Stone, Traverse | 62 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.