Alert archive / South Dakota / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 231, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Sep 18, 2018, 5:21 AM CDT for Deuel County, South Dakota. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 18, 2018, 5:21 AM CDT (10:21 UTC)
- Expired
- Sep 18, 2018, 5:45 AM CDT
- In force
- 24 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Deuel County, SD
The radar
The Sioux Falls radar (KFSD), 130 km from the middle of the area, began a volume at 10:23 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.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 10.4 hours before the alert went out and 242 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1687 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Sep 18, 3:22 AM CDT, 1 hour 59 minutes earlier.
Area forecast discussion, Sep 18, 3:22 AM CDT, 1 hour 59 minutes before
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Hazardous Weather Outlook National Weather Service Aberdeen SD 402 AM CDT Tue Sep 18 2018 MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-190915- Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-Roberts- Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant- Hamlin-Deuel-Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo- 402 AM CDT Tue Sep 18 2018 /302 AM MDT Tue Sep 18 2018/ This Hazardous Weather Outlook is for west central Minnesota, central South Dakota, north central South Dakota and northeast South Dakota. .DAY ONE...Today and tonight. Isolated showers and thunderstorms are possible today, but with an uptick in coverage tonight. The threat of severe weather looks minimal at this time. Therefore, lightning is the main threat. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Scattered showers and storms are expected for the middle and late part of the work week. There is a marginal risk of severe weather on Wednesday and Wednesday night, mainly over eastern and south parts of the forecast area. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Sep 18, 2:10 AM CDT, 3 hours 11 minutes before
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</html>Special weather statement, Sep 18, 2:53 AM CDT, 2 hours 28 minutes before
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</html>Local storm report, Sep 18, 5:17 AM CDT, 4 minutes before
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</html>The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 2:10 AM CDT | Special Weather Statement | ABR | Lyman | 35 min |
| Sep 18, 2:53 AM CDT | Special Weather Statement | ABR | Buffalo, Hand, Hyde, Lyman | 52 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2018Every severe thunderstorm warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.