Alert archive / Missouri / Mesoscale Discussions in 2017
Mesoscale Discussion 1403
The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2017, 11:48 PM CDT for Calhoun County, Pike County, Illinois; 35 counties in Missouri. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2017, 11:48 PM CDT (04:48 UTC)
- Expired
- Jul 23, 2017, 1:15 AM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 37 counties
Calhoun County, IL, Pike County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, Sullivan County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 149 km from the middle of the area, began a volume at 04:51 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, 4.8 hours before the alert went out and 279 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
- 2714 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1672 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 55 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 |
|---|---|---|---|---|
| Jul 22, 7:11 PM CDT | Mesoscale Discussion | SPC | Christian, Clark, Coles, Crawford, Cumberland, Douglas and 10 more | 94 min |
| Jul 23, 12:38 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Cass, Clinton and 13 more | 5 hr |
| Jul 23, 3:12 AM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clay, Clinton, Edwards and 23 more | 2 hr |
| Jul 23, 3:32 AM CDT | Severe Thunderstorm Watch | SPC | Christian, Clark, Clay, Coles, Crawford, Cumberland and 14 more | 4 hr |
| Jul 23, 5:23 AM CDT | Mesoscale Discussion | SPC | Clay, Crawford, Edwards, Effingham, Hamilton, Jasper and 5 more | 2 hr |
| Jul 23, 1:03 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Champaign, Cook, DeKalb, Douglas and 23 more | 2 hr |
| Jul 22, 9:22 PM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Bates, Boone, Buchanan, Caldwell and 27 more | 113 min |
Nearby
Mesoscale Discussions in Missouri, 2017Mesoscale Discussions in Illinois, 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.