Alert archive / Illinois / Mesoscale Discussions in 2014
Mesoscale Discussion 247
The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2014, 9:17 AM CDT for 25 counties in Illinois; 16 counties in Missouri. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Apr 2, 2014, 9:17 AM CDT (14:17 UTC)
- Expired
- Apr 2, 2014, 10:45 AM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 41 counties
Bond County, IL, Calhoun County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, Williamson County, IL, City of Saint Louis, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Maries County, MO, Montgomery County, MO, Osage County, MO, Perry County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 35 km from the middle of the area, began a volume at 14:19 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
Lincoln, IL (KILX), launched 12:00Z, 2.3 hours before the alert went out and 259 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1520 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 213 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 |
|---|---|---|---|---|
| Apr 2, 3:20 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 2 hr |
| Apr 1, 11:33 PM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Camden, Cass, Cedar and 17 more | 2 hr |
| Apr 2, 2:19 PM CDT | Mesoscale Discussion | SPC | Jasper | 116 min |
| Apr 2, 2:41 PM CDT | Tornado Watch | SPC | Barton, Jasper, Vernon | 7 hr |
| Apr 2, 6:00 PM CDT | Mesoscale Discussion | SPC | Barton, Jasper, Vernon | 60 min |
Nearby
Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Missouri, 2014Every mesoscale discussion in 2014
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.