Alert archive / Mississippi / Mesoscale Discussions in 2009
Mesoscale Discussion 166
The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2009, 3:38 PM CST for 4 counties in Alabama; 11 counties in Mississippi. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Feb 27, 2009, 3:38 PM CST (21:38 UTC)
- Expired
- Feb 27, 2009, 5:15 PM CST
- In force
- 97 min
- Issued by
- the Storm Prediction Center
Counties Greene County, AL, Hale County, AL, Perry County, AL, Sumter County, AL, Attala County, MS, Choctaw County, MS, Holmes County, MS, Humphreys County, MS, Kemper County, MS, Leake County, MS, Neshoba County, MS, Noxubee County, MS, Sharkey County, MS, Winston County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 110 km from the middle of the area, began a volume at 21:40 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, 9.6 hours before the alert went out and 114 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
- 822 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 529 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 293 m²/s²
- 0-3 km storm-relative helicity
- 400 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.0
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 |
|---|---|---|---|---|
| Feb 27, 8:29 AM CST | Mesoscale Discussion | SPC | Bibb, Blount, Chilton, Cullman, Fayette, Greene and 12 more | 31 min |
| Feb 27, 8:40 AM CST | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Chilton, Dallas, Fayette, Greene and 11 more | 6 hr |
| Feb 27, 10:15 AM CST | Mesoscale Discussion | SPC | Greene, Pickens, Sumter | 90 min |
| Feb 27, 12:16 PM CST | Mesoscale Discussion | SPC | Sumter | 89 min |
| Feb 27, 12:38 PM CST | Tornado Watch | SPC | Autauga, Barbour, Bibb, Bullock, Chilton, Choctaw and 20 more | 7 hr |
| Feb 27, 2:04 PM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Crenshaw, Lee, Macon, Montgomery and 2 more | 56 min |
| Feb 27, 5:29 PM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 22 more | 2 hr |
| Feb 26, 9:09 PM CST | Mesoscale Discussion | SPC | Benton, Coahoma, DeSoto, Marshall, Panola, Quitman and 3 more | 96 min |
| Feb 26, 9:40 PM CST | Severe Thunderstorm Watch | SPC | Coahoma, DeSoto, Tunica | 5 hr |
| Feb 27, 1:45 AM CST | Mesoscale Discussion | SPC | Tunica | 30 min |
Nearby
Mesoscale Discussions in Mississippi, 2009Mesoscale Discussions in Alabama, 2009Every mesoscale discussion in 2009
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.