Alert archive / Tennessee / Mesoscale Discussions in 2010
Mesoscale Discussion 46
The Storm Prediction Center issued this mesoscale discussion at Jan 21, 2010, 5:14 PM CST for 4 states. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jan 21, 2010, 5:14 PM CST (23:14 UTC)
- Expired
- Jan 21, 2010, 6:45 PM CST
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 60 counties
Jackson County, AL, Madison County, AL, Catoosa County, GA, Dade County, GA, Walker County, GA, Adair County, KY, Allen County, KY, Barren County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Logan County, KY, Metcalfe County, KY, Monroe County, KY, Pulaski County, KY, Russell County, KY, Simpson County, KY, Todd County, KY, Warren County, KY, Wayne County, KY, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 42 km from the middle of the area, began a volume at 23:14 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
Nashville Metro, TN (KBNA), launched 12:00Z, 11.2 hours before the alert went out and 40 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
- 24 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 73 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 |
|---|---|---|---|---|
| Jan 20, 8:59 PM CST | Mesoscale Discussion | SPC | Choctaw, Mobile, Washington | 91 min |
| Jan 20, 10:18 PM CST | Mesoscale Discussion | SPC | Coffee, Covington, Escambia, Geneva, Houston | 87 min |
| Jan 21, 1:31 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Butler, Choctaw, Clarke and 22 more | 29 min |
| Jan 21, 2:09 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 25 more | 7 hr |
| Jan 21, 5:44 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 25 more | 61 min |
| Jan 21, 7:57 AM CST | Mesoscale Discussion | SPC | Geneva, Houston | 33 min |
| Jan 21, 9:55 AM CST | Mesoscale Discussion | SPC | Colbert, Lauderdale | 65 min |
| Jan 21, 12:01 PM CST | Tornado Watch | SPC | Colbert, Franklin, Lauderdale | 3 hr |
| Jan 21, 7:12 AM CST | Mesoscale Discussion | SPC | Brooks, Colquitt, Cook, Decatur, Grady, Lanier and 4 more | 33 min |
| Jan 21, 7:25 AM CST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 18 more | 10 hr |
| Jan 21, 10:35 AM CST | Mesoscale Discussion | SPC | Camden, Charlton, Echols | 55 min |
| Jan 21, 3:16 PM CST | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Butler, Casey, Christian and 17 more | 6 hr |
Nearby
Mesoscale Discussions in Tennessee, 2010Mesoscale Discussions in Kentucky, 2010Mesoscale Discussions in Georgia, 2010Every mesoscale discussion in 2010
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.