Alert archive / Missouri / Mesoscale Discussions in 2017
Mesoscale Discussion 471
The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2017, 10:28 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2017, 10:28 PM CDT (03:28 UTC)
- Expired
- Apr 10, 2017, 12:30 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 51 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Clarke County, IA, Decatur County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Monroe County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell 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, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO, Nemaha County, NE, Richardson County, NE
The radar
The Pleasant Hill radar (KEAX), 147 km from the middle of the area, began a volume at 03:30 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 (KFOE), launched 00:00Z, 3.5 hours before the alert went out and 126 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
- 2023 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1543 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 6.4
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 9, 8:06 PM CDT | Mesoscale Discussion | SPC | Cerro Gordo, Chickasaw, Floyd, Franklin, Hancock, Howard and 4 more | 54 min |
| Apr 9, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Butler, Cerro Gordo, Chickasaw, Floyd, Franklin, Hancock and 5 more | 4 hr |
| Apr 9, 11:28 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Mahaska and 7 more | 4 hr |
| Apr 10, 1:53 AM CDT | Mesoscale Discussion | SPC | Appanoose, Cedar, Clinton, Davis, Des Moines, Henry and 15 more | 2 hr |
| Apr 10, 3:25 PM CDT | Mesoscale Discussion | SPC | Saint Louis, City of Saint Louis | 2 hr |
| Apr 10, 5:43 PM CDT | Mesoscale Discussion | SPC | Dent, Howell, Iron, Ozark, Reynolds, Shannon and 1 more | 2 hr |
| Apr 9, 7:47 PM CDT | Mesoscale Discussion | SPC | Clay, Fillmore, Gage, Jefferson, Nuckolls, Saline and 1 more | 88 min |
Nearby
Mesoscale Discussions in Missouri, 2017Mesoscale Discussions in Iowa, 2017Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017
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.