Alert archive / Missouri / Mesoscale Discussions in 2013
Mesoscale Discussion 509
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2013, 8:53 PM CDT for 5 counties in Illinois; 10 counties in Kansas; 54 counties in Missouri. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2013, 8:53 PM CDT (01:53 UTC)
- Expired
- Apr 17, 2013, 10:30 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 69 counties
Calhoun County, IL, Greene County, IL, Jersey County, IL, Pike County, IL, Scott County, IL, Allen County, KS, Anderson County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Audrain County, MO, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Stone County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Webster County, MO, Wright County, MO
The radar
The Springfield radar (KSGF), 104 km from the middle of the area, began a volume at 01:56 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
Springfield, MO (KSGF), launched 00:00Z, 1.9 hours before the alert went out and 150 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
- 1964 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1350 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 9.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 8:21 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, Christian, Coles, DeWitt, Douglas and 21 more | 84 min |
| Apr 17, 9:57 PM CDT | Tornado Watch | SPC | Adams, Brown, Pike | 7 hr |
| Apr 17, 10:48 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 12 more | 57 min |
| Apr 17, 11:46 PM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Morgan, Pike, Scott | 89 min |
| Apr 18, 2:01 AM CDT | Mesoscale Discussion | SPC | Calhoun, Jersey | 89 min |
| Apr 18, 4:02 AM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Monroe | 58 min |
| Apr 18, 5:36 AM CDT | Mesoscale Discussion | SPC | Bond, Clinton, Fayette, Madison, Monroe, Montgomery and 3 more | 54 min |
| Apr 18, 5:42 AM CDT | Tornado Watch | SPC | Bond, Clinton, Fayette, Jersey, Macoupin, Madison and 6 more | 8 hr |
| Apr 18, 7:25 AM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Clay, Coles, Crawford, Cumberland and 17 more | 95 min |
| Apr 18, 8:31 AM CDT | Tornado Watch | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 6 more | 7 hr |
| Apr 18, 9:25 AM CDT | Tornado Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 8 hr |
| Apr 18, 11:14 AM CDT | Mesoscale Discussion | SPC | Clark, Clay, Crawford, Jasper, Lawrence, Marion and 4 more | 2 hr |
| Apr 18, 12:48 PM CDT | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 87 min |
| Apr 18, 2:47 PM CDT | Mesoscale Discussion | SPC | Clark, Crawford, Lawrence | 88 min |
| Apr 18, 7:26 AM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Howell and 9 more | 2 hr |
Nearby
Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Kansas, 2013Mesoscale Discussions in Illinois, 2013Every mesoscale discussion in 2013
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.