Alert archive / Illinois / Mesoscale Discussions in 2016
Mesoscale Discussion 582
The Storm Prediction Center issued this mesoscale discussion at May 10, 2016, 7:01 AM CDT for 15 counties in Illinois; 6 counties in Missouri. It was in force for 104 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2016, 7:01 AM CDT (12:01 UTC)
- Expired
- May 10, 2016, 8:45 AM CDT
- In force
- 104 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 5%
All 21 counties
Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Jackson County, IL, Jefferson County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Iron County, MO, Jefferson County, MO, Madison County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO
The radar
The St Louis radar (KLSX), 123 km from the middle of the area, began a volume at 12:01 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
Nashville Metro, TN (KBNA), launched 12:00Z, 0.0 hours before the alert went out and 339 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
- 62 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 818 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 339 m²/s²
- 0-3 km storm-relative helicity
- 332 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 |
|---|---|---|---|---|
| May 9, 8:16 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 6 hr |
| May 9, 9:42 PM CDT | Mesoscale Discussion | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 2 more | 93 min |
| May 10, 12:59 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 9 hr |
| May 10, 3:08 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 67 min |
| May 10, 5:06 PM CDT | Tornado Watch | SPC | Gallatin, Hardin, Massac, Pope, Saline | 6 hr |
| May 9, 7:23 PM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 8 hr |
| May 9, 7:33 PM CDT | Mesoscale Discussion | SPC | Atchison, Holt | 57 min |
| May 9, 10:06 PM CDT | Mesoscale Discussion | SPC | Atchison, Holt, Nodaway | 54 min |
| May 9, 10:37 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Cedar, Christian, Dade, Dallas and 10 more | 83 min |
Nearby
Mesoscale Discussions in Illinois, 2016Mesoscale Discussions in Missouri, 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.