Alert archive / Iowa / Mesoscale Discussions in 2020
Mesoscale Discussion 1091
The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2020, 1:16 AM CDT for 14 counties in Iowa; 14 counties in Nebraska; 13 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 3, 2020, 1:16 AM CDT (06:16 UTC)
- Expired
- Jul 3, 2020, 3:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 41 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sac County, IA, Sioux County, IA, Woodbury County, IA, Antelope County, NE, Boyd County, NE, Burt County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 110 km from the middle of the area, began a volume at 06:16 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
Aberdeen, SD (KABR), launched 00:00Z, 6.3 hours before the alert went out and 252 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
- 1949 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1823 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 99 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 |
|---|---|---|---|---|
| Jul 2, 7:04 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clay, Custer, Dawson, Franklin and 11 more | 116 min |
| Jul 2, 7:38 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Dawson, Franklin, Furnas, Gosper and 5 more | 4 hr |
| Jul 2, 8:46 PM CDT | Mesoscale Discussion | SPC | Cherry | 59 min |
| Jul 3, 3:47 PM CDT | Mesoscale Discussion | SPC | Butte, Harding | 118 min |
| Jul 3, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Harding | 8 hr |
Nearby
Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in South Dakota, 2020Every mesoscale discussion in 2020
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.