Alert archive / Mississippi / Mesoscale Discussions in 2019
Mesoscale Discussion 2102
The Storm Prediction Center issued this mesoscale discussion at Oct 21, 2019, 8:59 AM CDT for 5 parishes in Louisiana; 17 counties in Mississippi. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Oct 21, 2019, 8:59 AM CDT (13:59 UTC)
- Expired
- Oct 21, 2019, 10:30 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 22 counties
Allen Parish, LA, Avoyelles Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Tensas Parish, LA, Adams County, MS, Attala County, MS, Choctaw County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Jefferson County, MS, Leake County, MS, Madison County, MS, Montgomery County, MS, Rankin County, MS, Warren County, MS, Webster County, MS, Wilkinson County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 93 km from the middle of the area, began a volume at 13:58 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
Jackson, MS (KJAN), launched 12:00Z, 2.0 hours before the alert went out and 86 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
- 12 J/kg
- Mixed-layer CIN
- -546 J/kg
- Mixed-layer LCL
- 1483 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 316 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 |
|---|---|---|---|---|
| Oct 20, 7:01 PM CDT | Tornado Watch | SPC | Bossier, Caddo, Claiborne, De Soto, Webster | 7 hr |
| Oct 21, 1:50 AM CDT | Tornado Watch | SPC | Bossier, Caddo, Claiborne, De Soto, Webster | 5 hr |
| Oct 21, 4:57 AM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, East Carroll, Franklin, Jackson, Lincoln and 8 more | 63 min |
| Oct 21, 5:30 AM CDT | Severe Thunderstorm Watch | SPC | Bienville, Caldwell, East Carroll, Franklin, Jackson, Lincoln and 10 more | 4 hr |
| Oct 21, 11:47 AM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 2 more | 88 min |
| Oct 21, 3:06 AM CDT | Tornado Watch | SPC | Benton, Calhoun, Coahoma, DeSoto, Lafayette, Marshall and 9 more | 6 hr |
Nearby
Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Louisiana, 2019Every mesoscale discussion in 2019
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.