Alert archive / Georgia / Mesoscale Discussions in 2009
Mesoscale Discussion 441
The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2009, 9:28 PM CDT for 13 counties in Alabama; 61 counties in Georgia. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2009, 9:28 PM CDT (02:28 UTC)
- Expired
- Apr 10, 2009, 11:00 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 74 counties
Autauga County, AL, Barbour County, AL, Bullock County, AL, Chambers County, AL, Elmore County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Wilcox County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Chattahoochee County, GA, Clayton County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Fayette County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 2.5 hours before the alert went out and 171 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
- 1068 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1433 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 390 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.8
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 10, 7:54 PM CDT | Mesoscale Discussion | SPC | Burke, Columbia, Jenkins, Lincoln, McDuffie, Richmond and 1 more | 66 min |
| Apr 10, 8:24 PM CDT | Tornado Watch | SPC | Burke | 5 hr |
| Apr 10, 10:11 PM CDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 22 more | 4 hr |
| Apr 10, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | Bulloch, Candler, Effingham, Evans, Jenkins, Screven and 1 more | 6 hr |
| Apr 10, 11:49 PM CDT | Mesoscale Discussion | SPC | Bibb, Bleckley, Burke, Candler, Crawford, Dodge and 25 more | 56 min |
| Apr 11, 12:48 AM CDT | Mesoscale Discussion | SPC | Effingham, Screven | 57 min |
| Apr 11, 1:44 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 16 more | 31 min |
Nearby
Mesoscale Discussions in Georgia, 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.