Alert archive / Tennessee / Mesoscale Discussions in 2012
Mesoscale Discussion 1122
The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2012, 1:12 PM CDT for 7 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2012, 1:12 PM CDT (18:12 UTC)
- Expired
- Jun 11, 2012, 2:45 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 146 counties
Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Limestone County, AL, Arkansas County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Allen County, KY, Ballard County, KY, Barren County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Stoddard County, MO, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Perry County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Memphis radar (KNQA), 10 km from the middle of the area, began a volume at 18:14 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 6.2 hours before the alert went out and 58 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
- 2451 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 786 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
827
ACUS11 KWNS 111813
SWOMCD
SPC MCD 111812
TNZ000-KYZ000-ALZ000-ILZ000-MSZ000-MOZ000-ARZ000-111945-
MESOSCALE DISCUSSION 1122
NWS STORM PREDICTION CENTER NORMAN OK
0112 PM CDT MON JUN 11 2012
AREAS AFFECTED...AR...MO...IL...KY...TN...MS...AL
CONCERNING...SEVERE THUNDERSTORM WATCH 372...
VALID 111812Z - 111945Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 372
CONTINUES.
SUMMARY...EXTENSIVE STRONG/SEVERE SQUALL LINE CONTINUES TO DEVELOP
EWD AND WILL CROSS THE MS RIVER THIS AFTERNOON. WITH THE CHANCE FOR
DAMAGING WINDS AND LARGE HAIL MOVING EAST INTO SRN IL...WRN
TN/KY...AND PORTIONS OF CNTRL/ERN AR AND NRN MS/AL...A NEW WATCH
ACROSS THESE AREAS WILL BE COORDINATED SHORTLY.
DISCUSSION...DEEP CONVECTION HAS PROGRESSED THROUGH THE MAJORITY OF
WW372 THROUGH THE LATE MORNING AND HAS SHOWN SOME INCREASE IN
STRENGTH AND ORGANIZATION ACROSS SERN MO LAST HOUR. ENTIRE
CONVECTIVE LINE WILL CONTINUE TO PROGRESS ESEWD ACROSS THE MS RIVER
AND SWD INTO ECNTRL AR OVER THE NEXT FEW HOURS WHERE MAGNITUDE OF
INSTABILITY SHOULD CONTINUE TO SUPPORT DAMAGING WINDS AND SOME HAIL.
..CARBIN/MEAD.. 06/11/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MRX...LMK...OHX...HUN...PAH...MEG...JAN...LZK...
LAT...LON 37528948 37788746 37078563 35658528 35128576 34728681
34368805 34118879 33979036 34059145 34099231 34249299
34499325 34699320 35189257 35449221 35879079 37528948SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 12:22 PM CDT | Mesoscale Discussion | SPC | Geneva, Henry, Houston | 53 min |
| Jun 11, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | Colbert, Cullman, Franklin, Lauderdale, Lawrence | 7 hr |
| Jun 11, 3:29 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale | 2 hr |
| Jun 11, 5:05 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence | 55 min |
| Jun 11, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Calhoun, Chambers, Chilton and 28 more | 6 hr |
| Jun 11, 9:31 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 16 more | 59 min |
| Jun 11, 9:45 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 23 more | 6 hr |
| Jun 11, 3:59 PM CDT | Mesoscale Discussion | SPC | Crawford, Polk, Scott, Sebastian, Washington | 91 min |
| Jun 11, 11:23 AM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Effingham, Franklin, Gallatin, Hamilton and 15 more | 97 min |
| Jun 10, 10:22 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Gentry, Holt, Nodaway and 2 more | 53 min |
Nearby
Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Arkansas, 2012Every mesoscale discussion in 2012
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.