Alert archive / Missouri / Mesoscale Discussions in 2020
Mesoscale Discussion 171
The Storm Prediction Center issued this mesoscale discussion at Mar 12, 2020, 2:31 PM CDT for 5 states. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 2020, 2:31 PM CDT (19:31 UTC)
- Expired
- Mar 12, 2020, 4:00 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 58 counties
Baxter County, AR, Boone County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Mississippi County, AR, Newton County, AR, Poinsett County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Alexander County, IL, Pulaski County, IL, Ballard County, KY, Fulton County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Taney County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Wright County, MO, Lake County, TN, Obion County, TN
The radar
The Memphis radar (KNQA), 188 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 233 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
- 210 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 |
|---|---|---|---|---|
| Mar 12, 11:13 AM CDT | Mesoscale Discussion | SPC | Mississippi | 2 hr |
| Mar 12, 3:44 PM CDT | Tornado Watch | SPC | Baxter, Boone, Clark, Clay, Cleburne, Conway and 42 more | 7 hr |
| Mar 12, 5:51 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Randolph and 1 more | 84 min |
| Mar 12, 9:21 AM CDT | Mesoscale Discussion | SPC | Madison, Monroe, Saint Clair | 114 min |
| Mar 12, 11:44 AM CDT | Tornado Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 6 hr |
| Mar 12, 1:28 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more | 2 hr |
| Mar 12, 3:20 PM CDT | Mesoscale Discussion | SPC | Hardin, Pope | 85 min |
| Mar 12, 5:09 PM CDT | Tornado Watch | SPC | Adair, Allen, Barren, Boyle, Breckinridge, Bullitt and 30 more | 5 hr |
| Mar 12, 6:20 PM CDT | Mesoscale Discussion | SPC | Adair, Barren, Clinton, Cumberland, Edmonson, Green and 6 more | 85 min |
Nearby
Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Arkansas, 2020Mesoscale Discussions in Illinois, 2020Every mesoscale discussion in 2020
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.