Alert archive / Mississippi / Mesoscale Discussions in 2004
Mesoscale Discussion 284
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2004, 4:47 PM CDT for Greene County, Pickens County, Sumter County, Alabama; 29 counties in Mississippi. It was in force for 28 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2004, 4:47 PM CDT (21:47 UTC)
- Expired
- Apr 7, 2004, 5:15 PM CDT
- In force
- 28 min
- Issued by
- the Storm Prediction Center
All 32 counties
Greene County, AL, Pickens County, AL, Sumter County, AL, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 107 km from the middle of the area, began a volume at 21:49 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
Jackson, MS (KJAN), launched 12:00Z, 9.8 hours before the alert went out and 104 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1925 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 5:06 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 114 min |
| Apr 7, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Butler, Chilton, Choctaw, Clarke, Conecuh and 11 more | 5 hr |
| Apr 7, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | Attala, Bolivar, Carroll, Choctaw, Clay, Grenada and 20 more | 6 hr |
| Apr 7, 6:08 PM CDT | Mesoscale Discussion | SPC | Adams | 67 min |
Nearby
Mesoscale Discussions in Mississippi, 2004Mesoscale Discussions in Alabama, 2004Every mesoscale discussion in 2004
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.