Alert archive / Mississippi / Mesoscale Discussions in 2003
Mesoscale Discussion 2091
The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2003, 1:28 AM CDT for 9 counties in Alabama; 14 counties in Mississippi; 13 counties in Tennessee. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2003, 1:28 AM CDT (06:28 UTC)
- Expired
- Aug 5, 2003, 2:30 AM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 36 counties
Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Marion County, AL, Pickens County, AL, Winston County, AL, Alcorn County, MS, Benton County, MS, Chickasaw County, MS, Clay County, MS, Itawamba County, MS, Lee County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Chester County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lawrence County, TN, Madison County, TN, McNairy County, TN, Perry County, TN, Wayne County, TN
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 6.5 hours before the alert went out and 117 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
- 2196 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1338 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.7
The text
As transmitted, in the capitals the NWS used until 2016.
980 ACUS11 KWNS 050628 SWOMCD SPC MCD 050628 ALZ000-TNZ000-MSZ000-050730- MESOSCALE DISCUSSION 2091 NWS STORM PREDICTION CENTER NORMAN OK 0128 AM CDT TUE AUG 05 2003 AREAS AFFECTED...WRN TN...NRN MS AND NWRN AL CONCERNING...SEVERE THUNDERSTORM WATCH 839... VALID 050628Z - 050730Z SEVERE THUNDERSTORM THREAT IS SLOWLY WEAKENING. WARM ADVECTION BETWEEN 700 AND 850 MB IS MAINTAINING CONVECTION ACROSS PORTIONS OF WRN TN/NERN MS AND NWRN AL. AIR MASS REMAINS MODERATELY UNSTABLE AND 30 KT MID LEVEL FLOW REMAINS FAVORABLE FOR ISOLATED SEVERE STORMS WITH MARGINALLY SEVERE HAIL. HOWEVER...THE STORMS ARE SLOWLY CONGEALING INTO A BROAD CLUSTER OF STORMS AND THE UPDRAFTS SHOULD CONTINUE TO SLOWLY WEAKEN. ALTHOUGH STORMS MAY TRAIN ACROSS SOME OF THE SAME AREAS WITH LOCALLY HEAVY RAINFALL...THE HAIL/WIND THREAT SHOULD CONTINUE TO DIMINISH AND WW WILL EXPIRE AS SCHEDULED AT 08Z. ..IMY.. 08/05/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OHX...BMX...HUN...MEG...JAN... 34378949 35328988 35848918 35828790 35008710 34048729 33248810 33758921 34098936
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:13 PM CDT | Mesoscale Discussion | SPC | Choctaw | 2 hr |
| Aug 4, 11:02 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 3 more | 88 min |
| Aug 4, 8:10 PM CDT | Mesoscale Discussion | SPC | Benton, DeSoto, Lafayette, Marshall, Tate, Tunica | 95 min |
| Aug 4, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Alcorn, Benton, DeSoto, Itawamba, Lafayette, Lee and 8 more | 6 hr |
| Aug 4, 8:59 PM CDT | Mesoscale Discussion | SPC | Blount, Bradley, Carter, Claiborne, Cocke, Grainger and 16 more | 2 hr |
Nearby
Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Alabama, 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.