Alert archive / Mississippi / Mesoscale Discussions in 2019
Mesoscale Discussion 284
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2019, 9:39 PM CDT for 5 counties in Alabama; Saint Bernard Parish, Louisiana; 28 counties in Mississippi. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2019, 9:39 PM CDT (02:39 UTC)
- Expired
- Apr 7, 2019, 11:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Saint Bernard Parish, LA, Attala County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Leake County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 02:41 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 2.7 hours before the alert went out and 126 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
- 2475 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 8.4
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 8, 5:11 AM CDT | Mesoscale Discussion | SPC | Geneva | 94 min |
| Apr 8, 5:21 AM CDT | Mesoscale Discussion | SPC | Blount, Etowah, Marshall | 54 min |
| Apr 8, 4:05 PM CDT | Mesoscale Discussion | SPC | Fayette, Greene, Lamar, Pickens, Sumter | 2 hr |
| Apr 7, 7:46 PM CDT | Severe Thunderstorm Watch | SPC | Ascension, East Baton Rouge, East Feliciana, Jefferson, Lafourche, Livingston and 11 more | 3 hr |
Nearby
Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Alabama, 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.