Alert archive / Iowa / Mesoscale Discussions in 2024
Mesoscale Discussion 545
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2024, 3:40 PM CDT for 5 states. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2024, 3:40 PM CDT (20:40 UTC)
- Expired
- Apr 27, 2024, 5:15 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 145...147
All 79 counties
Appanoose County, IA, Benton County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Henderson County, IL, Mercer County, IL, Rock Island County, IL, Anderson County, KS, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Nemaha County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Knox County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO, Richardson County, NE
The radar
The Pleasant Hill radar (KEAX), 119 km from the middle of the area, began a volume at 20:43 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
Topeka, KS (KTOP), launched 12:00Z, 8.7 hours before the alert went out and 178 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
- 1585 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.9
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 27, 5:17 PM CDT | Mesoscale Discussion | SPC | Carroll, Hancock, Henderson, Jo Daviess, Mercer, Rock Island and 1 more | 58 min |
| Apr 27, 5:58 PM CDT | Tornado Watch | SPC | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 6 hr |
| Apr 26, 7:27 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 16 more | 93 min |
| Apr 27, 1:40 PM CDT | Tornado Watch | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 10 more | 7 hr |
| Apr 27, 10:57 AM CDT | Mesoscale Discussion | SPC | Chautauqua, Cowley, Elk, Montgomery, Sumner, Wilson | 93 min |
| Apr 27, 11:33 AM CDT | Mesoscale Discussion | SPC | Atchison, Barton, Brown, Clay, Dickinson, Doniphan and 16 more | 117 min |
| Apr 27, 11:51 AM CDT | Tornado Watch | SPC | Anderson, Barber, Barton, Brown, Butler, Chase and 43 more | 8 hr |
| Apr 27, 1:15 PM CDT | Mesoscale Discussion | SPC | Ellis, Finney, Gove, Graham, Greeley, Hamilton and 13 more | 3 hr |
| Apr 27, 1:54 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Chautauqua, Cherokee, Cowley, Crawford and 7 more | 96 min |
| Apr 27, 2:54 PM CDT | Severe Thunderstorm Watch | SPC | Ellis, Finney, Gove, Graham, Greeley, Hamilton and 17 more | 6 hr |
| Apr 27, 4:31 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Cherokee, Crawford, Johnson and 6 more | 59 min |
| Apr 27, 4:57 PM CDT | Tornado Watch | SPC | Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 10 more | 8 hr |
Nearby
Mesoscale Discussions in Iowa, 2024Mesoscale Discussions in Missouri, 2024Mesoscale Discussions in Kansas, 2024Every mesoscale discussion in 2024
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.