Alert archive / Nebraska / Mesoscale Discussions in 2022
Mesoscale Discussion 461
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2022, 6:26 PM CDT for 4 counties in Iowa; 6 counties in Kansas; 13 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2022, 6:26 PM CDT (23:26 UTC)
- Expired
- Apr 12, 2022, 8:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 23 counties
Harrison County, IA, Mills County, IA, Pottawattamie County, IA, Shelby County, IA, Clay County, KS, Cloud County, KS, Mitchell County, KS, Ottawa County, KS, Republic County, KS, Washington County, KS, Cass County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 68 km from the middle of the area, began a volume at 23:24 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
Omaha, NE (KOAX), launched 12:00Z, 11.4 hours before the alert went out and 68 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
- 1473 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 597 m²/s²
- 0-3 km storm-relative helicity
- 872 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 12, 2:48 PM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Harrison, Ida, Lyon, Monona and 6 more | 87 min |
| Apr 12, 3:41 PM CDT | Tornado Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 6 hr |
| Apr 12, 5:11 PM CDT | Tornado Watch | SPC | Calhoun, Carroll, Cerro Gordo, Crawford, Emmet, Franklin and 12 more | 7 hr |
| Apr 12, 5:45 PM CDT | Mesoscale Discussion | SPC | Boone, Buena Vista, Calhoun, Cherokee, Clay, Hamilton and 9 more | 2 hr |
| Apr 12, 6:46 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Cass, Dallas and 15 more | 6 hr |
Nearby
Mesoscale Discussions in Nebraska, 2022Mesoscale Discussions in Kansas, 2022Mesoscale Discussions in Iowa, 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.