Alert archive / Illinois / Mesoscale Discussions in 2013
Mesoscale Discussion 190
The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2013, 12:46 PM CST for 25 counties in Illinois; 6 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 21, 2013, 12:46 PM CST (18:46 UTC)
- Expired
- Feb 21, 2013, 4:45 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Franklin County, IL, Greene County, IL, Hamilton County, IL, Jackson County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Scott County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Cape Girardeau County, MO, City of Saint Louis, MO, Lincoln County, MO, Perry County, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 18:47 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, 6.8 hours before the alert went out and 206 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
- 1055 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 83 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 |
|---|---|---|---|---|
| Feb 21, 11:19 AM CST | Mesoscale Discussion | SPC | Calhoun | 4 hr |
| Feb 21, 3:37 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Cass, Christian, Clark, Clay and 28 more | 4 hr |
| Feb 21, 2:32 AM CST | Mesoscale Discussion | SPC | Barry, Barton, Bates, Cedar, Christian, Dade and 15 more | 6 hr |
| Feb 21, 3:16 AM CST | Mesoscale Discussion | SPC | Cass, Jackson | 6 hr |
| Feb 21, 6:16 AM CST | Mesoscale Discussion | SPC | Adair, Andrew, Atchison, Audrain, Bates, Benton and 55 more | 5 hr |
| Feb 21, 9:27 AM CST | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Butler, Camden and 39 more | 4 hr |
Nearby
Mesoscale Discussions in Illinois, 2013Mesoscale Discussions in Missouri, 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.