Alert archive / Missouri / Mesoscale Discussions in 2016
Mesoscale Discussion 518
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2016, 7:36 PM CDT for 11 counties in Arkansas; 10 counties in Illinois; 14 counties in Missouri. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2016, 7:36 PM CDT (00:36 UTC)
- Expired
- Apr 30, 2016, 8:30 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 35 counties
Baxter County, AR, Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Izard County, AR, Marion County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Brown County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Pike County, IL, Saint Clair County, IL, Scott County, IL, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Oregon County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Shannon County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 00:39 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, 0.6 hours before the alert went out and 221 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
- 756 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1187 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 1, 5:06 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Clay, Clinton and 27 more | 114 min |
| May 1, 6:58 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Clay, Crawford, Cumberland, Edgar, Effingham and 3 more | 4 hr |
Nearby
Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Arkansas, 2016Mesoscale Discussions in Illinois, 2016Every mesoscale discussion in 2016
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.