Alert archive / Kansas / Mesoscale Discussions in 2018
Mesoscale Discussion 311
The Storm Prediction Center issued this mesoscale discussion at May 1, 2018, 9:06 PM CDT for 39 counties in Kansas. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2018, 9:06 PM CDT (02:06 UTC)
- Expired
- May 1, 2018, 10:00 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 39 counties
Atchison County, KS, Barton County, KS, Brown County, KS, Butler County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Ellsworth County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Kingman County, KS, Leavenworth County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Reno County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Stafford County, KS, Wabaunsee County, KS, Washington County, KS
The radar
The Topeka radar (KTWX), 67 km from the middle of the area, began a volume at 02:06 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
Topeka, KS (KFOE), launched 00:00Z, 2.1 hours before the alert went out and 118 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
- 543 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1230 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 334 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 11.0
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 |
|---|---|---|---|---|
| May 1, 7:24 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Brown, Clay, Cloud, Dickinson and 25 more | 2 hr |
| May 2, 11:36 AM CDT | Mesoscale Discussion | SPC | Barber, Chase, Clark, Comanche, Dickinson, Edwards and 15 more | 2 hr |
| May 2, 12:43 PM CDT | Tornado Watch | SPC | Anderson, Barber, Barton, Brown, Butler, Chase and 51 more | 9 hr |
| May 2, 2:47 PM CDT | Mesoscale Discussion | SPC | Edwards, Kiowa, McPherson, Rice, Stafford | 118 min |
| May 2, 5:08 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 1 more | 97 min |
| May 2, 5:18 PM CDT | Mesoscale Discussion | SPC | Atchison, Barber, Brown, Butler, Chase, Clay and 28 more | 87 min |
| May 2, 5:27 PM CDT | Tornado Watch | SPC | Atchison, Doniphan, Johnson, Leavenworth, Linn, Miami and 1 more | 8 hr |
Nearby
Mesoscale Discussions in Kansas, 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.