Alert archive / Alabama / Mesoscale Discussions in 2013
Mesoscale Discussion 672
The Storm Prediction Center issued this mesoscale discussion at May 17, 2013, 5:45 PM CDT for 13 counties in Alabama; Kemper County, Lauderdale County, Noxubee County, Mississippi. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 17, 2013, 5:45 PM CDT (22:45 UTC)
- Expired
- May 17, 2013, 6:45 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Autauga County, AL, Bibb County, AL, Chilton County, AL, Dallas County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Wilcox County, AL, Kemper County, MS, Lauderdale County, MS, Noxubee County, MS
The radar
The Birmingham radar (KBMX), 71 km from the middle of the area, began a volume at 22:46 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
Birmingham, AL (KBMX), launched 12:00Z, 10.8 hours before the alert went out and 71 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
- 218 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 44 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 |
|---|---|---|---|---|
| May 17, 1:39 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Chilton, Choctaw and 29 more | 96 min |
| May 17, 6:19 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 10 more | 5 hr |
| May 16, 7:24 PM CDT | Mesoscale Discussion | SPC | Issaquena, Sharkey, Washington | 96 min |
| May 16, 7:59 PM CDT | Tornado Watch | SPC | Humphreys, Issaquena, Sharkey, Warren, Washington | 4 hr |
| May 16, 10:59 PM CDT | Mesoscale Discussion | SPC | Issaquena, Sharkey, Washington | 61 min |
| May 17, 4:00 PM CDT | Mesoscale Discussion | SPC | Claiborne, Hinds, Issaquena, Jefferson, Sharkey, Warren | 60 min |
Nearby
Mesoscale Discussions in Alabama, 2013Mesoscale Discussions in Mississippi, 2013Every mesoscale discussion in 2013
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.