Alert archive / Missouri / Mesoscale Discussions in 2018
Mesoscale Discussion 471
The Storm Prediction Center issued this mesoscale discussion at May 20, 2018, 12:42 AM CDT for 6 counties in Kansas; 34 counties in Missouri. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2018, 12:42 AM CDT (05:42 UTC)
- Expired
- May 20, 2018, 3:15 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 40 counties
Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Linn County, KS, Miami County, KS, Neosho County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cass County, MO, Cedar County, MO, Christian County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO, Webster County, MO, Wright County, MO
The radar
The Springfield radar (KSGF), 78 km from the middle of the area, began a volume at 05:44 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
Springfield, MO (KSGF), launched 00:00Z, 5.7 hours before the alert went out and 108 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
- 1239 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1638 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 10.1
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 19, 7:41 PM CDT | Mesoscale Discussion | SPC | Anderson, Coffey, Franklin, Linn, Lyon, Miami and 1 more | 94 min |
| May 20, 2:24 PM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford | 3 hr |
| May 20, 3:32 PM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Cherokee, Crawford | 4 hr |
| May 20, 11:43 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 3 more | 3 hr |
| May 20, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot and 2 more | 6 hr |
| May 20, 3:32 PM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 5 more | 118 min |
| May 20, 6:25 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 30 more | 95 min |
| May 20, 6:26 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 64 min |
Nearby
Mesoscale Discussions in Missouri, 2018Mesoscale 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.