Alert archive / Kansas / Mesoscale Discussions in 2018
Mesoscale Discussion 239
The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2018, 2:06 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2018, 2:06 PM CDT (19:06 UTC)
- Expired
- Apr 13, 2018, 4:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 63 counties
Adair County, IA, Adams County, IA, Cass County, IA, Clarke County, IA, Decatur County, IA, Fremont County, IA, Madison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Anderson County, KS, Atchison County, KS, Brown County, KS, Chase County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Cass 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, Mercer County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO, Cass County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE
The radar
The Topeka radar (KTWX), 114 km from the middle of the area, began a volume at 19:07 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 12:00Z, 7.1 hours before the alert went out and 88 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
- 641 J/kg
- Mixed-layer CIN
- -644 J/kg
- Mixed-layer LCL
- 1295 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 534 m²/s²
- 0-3 km storm-relative helicity
- 508 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 13, 8:44 AM CDT | Mesoscale Discussion | SPC | Allamakee, Dickinson, Emmet, Howard, Lyon, Mitchell and 4 more | 3 hr |
| Apr 13, 2:19 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Cass, Clarke, Davis and 17 more | 7 hr |
| Apr 13, 3:22 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Black Hawk, Boone, Calhoun, Carroll, Dallas and 13 more | 6 hr |
| Apr 13, 5:31 PM CDT | Mesoscale Discussion | SPC | Audubon, Carroll, Cass, Fremont, Greene, Guthrie and 5 more | 29 min |
| Apr 13, 12:39 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Chautauqua, Cherokee, Crawford, Labette and 4 more | 2 hr |
| Apr 13, 1:20 PM CDT | Tornado Watch | SPC | Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more | 9 hr |
| Apr 13, 3:43 PM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Labette, Montgomery, Neosho, Wilson | 92 min |
| Apr 13, 5:08 PM CDT | Mesoscale Discussion | SPC | Benton, Camden, Carter, Christian, Cole, Dallas and 23 more | 2 hr |
| Apr 13, 5:27 PM CDT | Tornado Watch | SPC | Bollinger, Butler, Camden, Cape Girardeau, Carter, Crawford and 33 more | 8 hr |
| Apr 13, 5:53 PM CDT | Mesoscale Discussion | SPC | Dunklin | 97 min |
Nearby
Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Missouri, 2018Mesoscale Discussions in Iowa, 2018Every mesoscale discussion in 2018
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.