Alert archive / Missouri / Mesoscale Discussions in 2015
Mesoscale Discussion 1490
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2015, 7:47 PM CDT for 8 counties in Illinois; Ballard County, Kentucky; 21 counties in Missouri. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2015, 7:47 PM CDT (00:47 UTC)
- Expired
- Jul 19, 2015, 9:45 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 30 counties
Alexander County, IL, Jackson County, IL, Johnson County, IL, Monroe County, IL, Perry County, IL, Pulaski County, IL, Randolph County, IL, Union County, IL, Ballard County, KY, Bollinger County, MO, Cape Girardeau County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Maries County, MO, Mississippi County, MO, Perry County, MO, Phelps County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO
The radar
The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 00:50 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, 0.8 hours before the alert went out and 297 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
- 4333 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1034 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 20, 6:23 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more | 97 min |
| Jul 20, 6:42 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 6 more | 5 hr |
| Jul 20, 1:05 PM CDT | Mesoscale Discussion | SPC | Adair, Bell, Breathitt, Casey, Clay, Clinton and 25 more | 85 min |
| Jul 20, 3:50 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Bollinger, Butler and 42 more | 115 min |
Nearby
Mesoscale Discussions in Missouri, 2015Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Kentucky, 2015Every mesoscale discussion in 2015
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.