Alert archive / Iowa / Mesoscale Discussions in 2020
Mesoscale Discussion 700
The Storm Prediction Center issued this mesoscale discussion at May 24, 2020, 4:13 AM CDT for 4 states. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2020, 4:13 AM CDT (09:13 UTC)
- Expired
- May 24, 2020, 5:15 AM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 76 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clarke County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Ida County, IA, Jasper County, IA, Kossuth County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Faribault County, MN, Jackson County, MN, Martin County, MN, Atchison County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO, Cass County, NE, Otoe County, NE
The radar
The Des Moines radar (KDMX), 75 km from the middle of the area, began a volume at 09:15 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 00:00Z, 9.2 hours before the alert went out and 201 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
- 446 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1484 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 |
|---|---|---|---|---|
| May 23, 11:58 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Harrison, Ida, Lyon, Mills, Monona and 6 more | 6 hr |
| May 24, 5:30 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more | 4 hr |
| May 24, 1:13 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Cass and 21 more | 92 min |
| May 24, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 32 more | 6 hr |
| May 24, 3:25 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 19 more | 95 min |
| May 24, 2:58 PM CDT | Mesoscale Discussion | SPC | Barry, Benton, Camden, Cedar, Christian, Cole and 21 more | 2 hr |
| May 23, 7:53 PM CDT | Mesoscale Discussion | SPC | Blaine, Boyd, Brown, Cherry, Custer, Dawson and 13 more | 97 min |
| May 23, 8:29 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Chase, Cherry, Custer and 16 more | 5 hr |
| May 23, 11:08 PM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Custer, Dawson, Lincoln, Logan and 4 more | 2 hr |
| May 24, 1:20 AM CDT | Mesoscale Discussion | SPC | Boone, Greeley, Nance, Valley, Wheeler | 55 min |
| May 24, 5:14 PM CDT | Mesoscale Discussion | SPC | Adams, Clay, Fillmore, Franklin, Harlan, Nuckolls and 2 more | 91 min |
| May 24, 5:36 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Fillmore, Nuckolls, Thayer, Webster | 6 hr |
Nearby
Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Minnesota, 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.