Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 140, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 19, 1997, 8:55 PM CDT for Big Stone County, Minnesota. It was in force for 65 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 19, 1997, 8:55 PM CDT (01:55 UTC)
- Expired
- Jul 19, 1997, 10:00 PM CDT
- In force
- 65 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Big Stone County, MN
The radar
The Aberdeen radar (KABR), 156 km from the middle of the area, began a volume at 01:55 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 | Ortonville, MN |
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, 1.9 hours before the alert went out and 167 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, 10:14 AM CDT, 10 hours 41 minutes earlier.
Area forecast discussion, Jul 19, 10:14 AM CDT, 10 hours 41 minutes before
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Special weather statement, Jul 19, 3:30 PM CDT, 5 hours 25 minutes 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, 9:30 PM CDT | Severe Thunderstorm Warning | ABR | Grant, Roberts | 45 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 20, 5:58 AM CDT | Severe Thunderstorm Warning | ABR | Big Stone, Traverse | 62 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.