Alert archive / South Dakota / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 195
The Storm Prediction Center issued this severe thunderstorm watch at May 22, 2016, 8:22 PM CDT for 8 counties in Nebraska; 18 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 22, 2016, 8:22 PM CDT (01:22 UTC)
- Expired
- May 23, 2016, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 26 counties
Antelope County, NE, Boyd County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Loup County, NE, Rock County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 159 km from the middle of the area, began a volume at 01:25 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 8:34 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 41 min |
| May 22, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix, Gregory | 47 min |
| May 22, 9:51 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Douglas | 39 min |
| May 22, 10:06 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 39 min |
| May 22, 10:23 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Davison, Douglas, Jerauld, Sanborn | 52 min |
| May 22, 10:45 PM CDT | Flash Flood Warning | FSD | Aurora, Brule, Charles Mix, Gregory | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.4 hours before the alert went out and 220 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
- 1223 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1730 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 7:33 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Boyd, Cedar, Garfield, Greeley and 8 more | 87 min |
| May 22, 9:26 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Cherry, Custer, Dawson and 11 more | 94 min |
| May 22, 9:59 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Chase, Cherry, Custer and 11 more | 5 hr |
| May 22, 10:19 PM CDT | Mesoscale Discussion | SPC | Dundy, Furnas, Hitchcock, Red Willow | 86 min |
| May 23, 1:13 AM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Boyd, Buffalo, Cedar and 20 more | 92 min |
| May 23, 1:58 PM CDT | Mesoscale Discussion | SPC | Burt, Cass, Cedar, Colfax, Cuming, Dakota and 9 more | 92 min |
| May 23, 2:30 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Butler, Clay, Colfax, Fillmore and 18 more | 2 hr |
| May 22, 9:06 PM CDT | Mesoscale Discussion | SPC | Brown, Buffalo, Campbell, Corson, Dewey, Edmunds and 7 more | 114 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2016Severe Thunderstorm Watches in Nebraska, 2016Every severe thunderstorm watch in 2016
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.