Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 583
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2003, 3:22 PM CDT for 12 counties in Kentucky; 26 counties in Tennessee. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2003, 3:22 PM CDT (20:22 UTC)
- Expired
- Apr 25, 2003, 5:15 PM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 38 counties
Allen County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale 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
Nashville Metro, TN (KBNA), launched 12:00Z, 8.4 hours before the alert went out and 76 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
- 3 J/kg
- Mixed-layer CIN
- -232 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
467 ACUS11 KWNS 252022 SWOMCD SPC MCD 252022 TNZ000-KYZ000-ILZ000-252215- MESOSCALE DISCUSSION 0583 NWS STORM PREDICTION CENTER NORMAN OK 0322 PM CDT FRI APR 25 2003 AREAS AFFECTED...WRN/CNTRL KY...MIDDLE TN CONCERNING...SEVERE THUNDERSTORM WATCH 165... VALID 252022Z - 252215Z MID-LEVEL CYCLONIC VORTICITY CENTER CONTINUES TO MIGRATE SOUTH OF CAPE GIRARDEAU MO...AND WILL PROGRESS EASTWARD INTO FAR WESTERN KENTUCKY NEXT FEW HOURS. FORCING FOR UPWARD VERTICAL MOTION CONTINUES TO SUPPORT SEVERAL BANDS OF CONVECTION NORTH/EAST OF VORT CENTER...WHERE STRONG /ISOLATED SEVERE STORMS WILL REMAIN POSSIBLE DURING PEAK AFTERNOON HEATING. ..KERR.. 04/25/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LMK...OHX...PAH...MEG... 36538838 36868871 37228864 37188690 37078600 36348561 35668586 35098699 35348791 36138805
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 11:04 AM CDT | Mesoscale Discussion | SPC | Caldwell, Calloway, Christian, Graves, Hopkins, Lyon and 4 more | 116 min |
| Apr 25, 11:50 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Butler, Caldwell, Calloway and 16 more | 5 hr |
| Apr 25, 4:40 PM CDT | Tornado Watch | SPC | Adair, Allen, Barren, Breckinridge, Butler, Caldwell and 34 more | 4 hr |
| Apr 25, 6:29 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Breckinridge, Bullitt, Butler and 33 more | 91 min |
| Apr 24, 11:45 PM CDT | Tornado Watch | SPC | Chester, Crockett, Dyer, Fayette, Gibson, Hardeman and 6 more | 5 hr |
| Apr 25, 1:15 AM CDT | Mesoscale Discussion | SPC | Chester, Crockett, Dyer, Fayette, Gibson, Hardeman and 6 more | 90 min |
| Apr 25, 3:05 AM CDT | Mesoscale Discussion | SPC | Chester, Crockett, Fayette, Hardeman, Hardin, Haywood and 5 more | 85 min |
| Apr 25, 1:55 PM CDT | Mesoscale Discussion | SPC | Cheatham, Davidson, Dickson, Hickman, Houston, Lewis and 4 more | 2 hr |
| Apr 25, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Bedford, Bledsoe, Bradley, Cannon, Clay, Coffee and 28 more | 4 hr |
| Apr 25, 6:48 PM CDT | Mesoscale Discussion | SPC | Bledsoe, Bradley, Clay, Cumberland, DeKalb, Fentress and 13 more | 87 min |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 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.