Alert archive / Mississippi / Mesoscale Discussions in 2015
Mesoscale Discussion 805
The Storm Prediction Center issued this mesoscale discussion at May 27, 2015, 11:51 AM CDT for Choctaw County, Sumter County, Alabama; 32 counties in Mississippi. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2015, 11:51 AM CDT (16:51 UTC)
- Expired
- May 27, 2015, 12:45 PM CDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 34 counties
Choctaw County, AL, Sumter County, AL, Attala County, MS, Choctaw County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha 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, Winston County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 93 km from the middle of the area, began a volume at 16:51 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, 4.9 hours before the alert went out and 103 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
- 1302 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 682 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 |
|---|---|---|---|---|
| May 27, 12:43 PM CDT | Severe Thunderstorm Watch | SPC | Attala, Choctaw, Clarke, Clay, Copiah, Covington and 24 more | 4 hr |
| May 27, 3:12 PM CDT | Mesoscale Discussion | SPC | Attala, Choctaw, Clarke, Clay, Jasper, Kemper and 13 more | 93 min |
Nearby
Mesoscale Discussions in Mississippi, 2015Mesoscale Discussions in Alabama, 2015Every mesoscale discussion in 2015
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.