Alert archive / Missouri / Mesoscale Discussions in 2022
Mesoscale Discussion 474
The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2022, 10:49 AM CDT for Baxter County, Fulton County, Marion County, Arkansas; 12 counties in Illinois; 25 counties in Missouri. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2022, 10:49 AM CDT (15:49 UTC)
- Expired
- Apr 13, 2022, 11:45 AM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 80%
All 40 counties
Baxter County, AR, Fulton County, AR, Marion County, AR, Alexander County, IL, Franklin County, IL, Jackson County, IL, Johnson County, IL, Monroe County, IL, Perry County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Bollinger County, MO, Cape Girardeau County, MO, Carter County, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Oregon County, MO, Ozark County, MO, Perry County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Wright County, MO
The radar
The St Louis radar (KLSX), 156 km from the middle of the area, began a volume at 15:50 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 3.8 hours before the alert went out and 289 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
- 141 J/kg
- Mixed-layer CIN
- -450 J/kg
- Mixed-layer LCL
- 565 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 627 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.7
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 |
|---|---|---|---|---|
| Apr 12, 7:29 PM CDT | Tornado Watch | SPC | Bradley, Calhoun, Columbia, Hempstead, Lafayette, Little River and 4 more | 7 hr |
| Apr 12, 9:39 PM CDT | Mesoscale Discussion | SPC | Calhoun, Columbia, Hempstead, Lafayette, Little River, Miller and 3 more | 96 min |
| Apr 12, 11:11 PM CDT | Mesoscale Discussion | SPC | Ashley, Chicot | 2 hr |
| Apr 12, 11:21 PM CDT | Tornado Watch | SPC | Ashley, Chicot | 4 hr |
| Apr 13, 7:05 AM CDT | Mesoscale Discussion | SPC | Calhoun, Clark, Cleveland, Columbia, Dallas, Garland and 19 more | 2 hr |
| Apr 13, 10:07 AM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Conway and 23 more | 83 min |
| Apr 13, 10:37 AM CDT | Tornado Watch | SPC | Bradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 36 more | 6 hr |
| Apr 13, 12:32 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 2 more | 118 min |
| Apr 13, 1:42 PM CDT | Tornado Watch | SPC | Arkansas, Clay, Craighead, Crittenden, Cross, Desha and 9 more | 7 hr |
| Apr 13, 2:42 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more | 63 min |
| Apr 13, 2:48 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Union | 8 hr |
| Apr 13, 3:36 PM CDT | Mesoscale Discussion | SPC | Chicot | 84 min |
| Apr 13, 5:00 PM CDT | Mesoscale Discussion | SPC | Desha, Drew, Phillips | 90 min |
| Apr 13, 7:38 AM CDT | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Pike, Scott | 2 hr |
| Apr 13, 11:16 AM CDT | Tornado Watch | SPC | Alexander, Clinton, Franklin, Jackson, Jefferson, Johnson and 9 more | 5 hr |
| Apr 13, 1:48 PM CDT | Mesoscale Discussion | SPC | Champaign, Cook, DeKalb, DeWitt, DuPage, Ford and 21 more | 87 min |
| Apr 13, 3:35 PM CDT | Tornado Watch | SPC | Hardin, Massac, Pope | 3 hr |
| Apr 12, 9:38 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Gentry, Harrison, Holt, Mercer and 2 more | 2 hr |
Nearby
Mesoscale Discussions in Missouri, 2022Mesoscale Discussions in Illinois, 2022Mesoscale Discussions in Arkansas, 2022Every mesoscale discussion in 2022
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.