Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 1813
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 3:53 PM CDT for 4 states. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2003, 3:53 PM CDT (20:53 UTC)
- Expired
- Jul 13, 2003, 5:00 PM CDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 77 counties
Colbert County, AL, Lauderdale County, AL, Arkansas County, AR, Ashley County, AR, Chicot County, AR, Crittenden County, AR, Desha County, AR, Lee County, AR, Monroe County, AR, Phillips County, AR, St. Francis County, AR, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Washington County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Gibson 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, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Perry County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
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, 8.9 hours before the alert went out and 48 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
- 2438 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1048 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
015 ACUS11 KWNS 132053 SWOMCD SPC MCD 132053 TNZ000-ALZ000-MSZ000-ARZ000-LAZ000-132200- MESOSCALE DISCUSSION 1813 NWS STORM PREDICTION CENTER NORMAN OK 0353 PM CDT SUN JUL 13 2003 AREAS AFFECTED...SERN AR...NRN MS AND WRN TN CONCERNING...SEVERE THUNDERSTORM WATCH 736... VALID 132053Z - 132200Z THREAT FOR ISOLATED DAMAGING WIND AND LARGE HAIL WILL PERSIST AT LEAST ANOTHER COUPLE HOURS...MAINLY ACROSS PARTS OF NRN MS AND WRN/MIDDLE TN. SCATTERED MULTICELL STORMS CONTINUE DEVELOPING ALONG NUMEROUS OUTFLOW BOUNDARIES FROM WRN TN SWWD THROUGH NRN MS. PORTION OF OUTFLOW BOUNDARY ACROSS NWRN MS HAS BEEN GENERALLY FREE OF CONVECTION. HOWEVER...BUT NEW CELLS ARE BEGINNING TO DEVELOP ALONG THE BOUNDARY AND THIS ACTIVITY WILL SUBSEQUENTLY SPREAD SEWD INTO N CNTRL MS WHERE ATMOSPHERE IS MODERATELY UNSTABLE. ..DIAL.. 07/13/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OHX...HUN...MEG...JAN...LZK... 32969192 33889134 34619152 35878968 36438852 36508704 36328544 35128722 33758907 32939038
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 11:02 AM CDT | Mesoscale Discussion | SPC | Bibb, Choctaw, Clarke, Dallas, Fayette, Greene and 12 more | 118 min |
| Jul 13, 11:55 AM CDT | Severe Thunderstorm Watch | SPC | Colbert, Lauderdale | 6 hr |
| Jul 13, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Blount, Calhoun, Cherokee, Cullman, DeKalb, Etowah and 12 more | 5 hr |
| Jul 13, 5:26 PM CDT | Mesoscale Discussion | SPC | Jackson | 94 min |
| Jul 13, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 1 more | 4 hr |
| Jul 13, 11:30 AM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Cleveland, Columbia, Crittenden and 11 more | 2 hr |
| Jul 13, 1:30 PM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 6 more | 60 min |
| Jul 13, 4:44 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Cleburne, Craighead, Fulton and 12 more | 61 min |
| Jul 13, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Boone, Carroll, Cleburne, Craighead, Crittenden and 18 more | 5 hr |
| Jul 13, 6:54 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Jackson, Lee, Monroe, Poinsett and 4 more | 96 min |
| Jul 13, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | Adams | 5 hr |
| Jul 13, 4:33 PM CDT | Mesoscale Discussion | SPC | Adams | 87 min |
| Jul 13, 12:16 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 39 more | 119 min |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Arkansas, 2003Every mesoscale discussion in 2003
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.