Alert archive / South Dakota / Mesoscale Discussions in 2022
Mesoscale Discussion 533
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2022, 2:38 PM MDT for 5 counties in Nebraska; 10 counties in South Dakota; Goshen County, Wyoming. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2022, 2:38 PM MDT (20:38 UTC)
- Expired
- Apr 22, 2022, 3:45 PM MDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
Counties Box Butte County, NE, Dawes County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Todd County, SD, Goshen County, WY
The radar
The Rapid City radar (KUDX), 146 km from the middle of the area, began a volume at 20:42 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.6 hours before the alert went out and 140 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
- 124 J/kg
- Mixed-layer CIN
- -397 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 9:13 PM MDT | Mesoscale Discussion | SPC | Adams, Butler, Clay, Fillmore, Franklin, Gage and 17 more | 3 hr |
| Apr 21, 10:16 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Boone, Buffalo, Burt, Butler, Cass and 26 more | 7 hr |
| Apr 22, 12:53 AM MDT | Mesoscale Discussion | SPC | Boone, Burt, Butler, Cass, Colfax, Cuming and 16 more | 3 hr |
| Apr 22, 4:08 PM MDT | Mesoscale Discussion | SPC | Blaine, Boyd, Brown, Cherry, Custer, Dawson and 12 more | 97 min |
| Apr 22, 4:58 PM MDT | Severe Thunderstorm Watch | SPC | Dundy, Hitchcock, Red Willow | 8 hr |
| Apr 22, 3:45 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Custer, Fall River, Haakon, Jackson, Lawrence and 4 more | 8 hr |
| Apr 22, 4:34 PM MDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brule, Buffalo, Charles Mix, Davison and 18 more | 5 hr |
Nearby
Mesoscale Discussions in South Dakota, 2022Mesoscale Discussions in Nebraska, 2022Mesoscale Discussions in Wyoming, 2022Every mesoscale discussion in 2022
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.