Alert archive / Alabama / Mesoscale Discussions in 2009
Mesoscale Discussion 270
The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2009, 6:01 AM CDT for 21 counties in Alabama; Escambia County, Santa Rosa County, Florida. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Mar 26, 2009, 6:01 AM CDT (11:01 UTC)
- Expired
- Mar 26, 2009, 7:30 AM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 23 counties
Autauga County, AL, Baldwin County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Clay County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Elmore County, AL, Escambia County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Talladega County, AL, Tallapoosa County, AL, Escambia County, FL, Santa Rosa County, FL
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, 11.0 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 98 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 |
|---|---|---|---|---|
| Mar 25, 11:38 PM CDT | Mesoscale Discussion | SPC | Choctaw, Clarke, Dallas, Marengo, Monroe, Sumter and 2 more | 97 min |
| Mar 26, 1:25 AM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 16 more | 35 min |
| Mar 26, 1:36 AM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 37 more | 9 hr |
| Mar 26, 3:40 AM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 17 more | 95 min |
| Mar 26, 7:27 AM CDT | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston | 6 hr |
| Mar 26, 5:56 PM CDT | Tornado Watch | SPC | Baldwin, Mobile, Washington | 7 hr |
| Mar 26, 11:12 AM CDT | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 4 more | 63 min |
Nearby
Mesoscale Discussions in Alabama, 2009Mesoscale Discussions in Florida, 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.