Alert archive / South Dakota / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 7, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at May 18, 2013, 5:11 PM MDT for Corson County, Dewey County, South Dakota. It was in force for 49 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
- May 18, 2013, 5:11 PM MDT (23:11 UTC)
- Expired
- May 18, 2013, 6:00 PM MDT
- In force
- 49 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 150 km from the middle of the area, began a volume at 23:12 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 18, 4:46 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 11.2 hours before the alert went out and 210 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
- 277 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.3
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 May 18, 1:56 PM MDT, 3 hours 15 minutes earlier.
Area forecast discussion, May 18, 1:56 PM MDT, 3 hours 15 minutes before
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</html>Hazardous weather outlook, May 18, 3:12 AM MDT, 13 hours 59 minutes before
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Local storm report, May 18, 4:50 PM MDT, 21 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 |
|---|---|---|---|---|
| May 17, 6:41 PM MDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 49 min |
| May 17, 7:14 PM MDT | Severe Thunderstorm Warning | ABR | Hughes, Jones, Stanley | 61 min |
| May 17, 10:35 PM MDT | Severe Thunderstorm Warning | ABR | Clark, Faulk, Spink | 55 min |
| May 17, 11:12 PM MDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Codington, Day, Grant, Hamlin and 1 more | 63 min |
| May 18, 4:31 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 44 min |
| May 18, 5:06 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Stanley, Sully | 39 min |
| May 18, 5:46 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Stanley, Sully | 44 min |
| May 18, 5:52 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 38 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2013Every severe thunderstorm warning in 2013
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.