Alert archive / Mississippi / Mesoscale Discussions in 2005
Mesoscale Discussion 2521
The Storm Prediction Center issued this mesoscale discussion at Dec 3, 2005, 9:35 PM CST for 5 states. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Dec 3, 2005, 9:35 PM CST (03:35 UTC)
- Expired
- Dec 3, 2005, 11:30 PM CST
- In force
- 115 min
- Issued by
- the Storm Prediction Center
All 80 counties
Colbert County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Marion County, AL, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Columbia County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, Phillips County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Alcorn County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sharkey 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, Webster County, MS, Yalobusha County, MS, Yazoo County, MS, Chester County, TN, Decatur County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Wayne County, TN
The radar
The Memphis radar (KNQA), 164 km from the middle of the area, began a volume at 03:37 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 00:00Z, 3.6 hours before the alert went out and 108 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2212 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 040336 SWOMCD SPC MCD 040335 TNZ000-ALZ000-MSZ000-ARZ000-LAZ000-040530- MESOSCALE DISCUSSION 2521 NWS STORM PREDICTION CENTER NORMAN OK 0935 PM CST SAT DEC 03 2005 AREAS AFFECTED...SWRN TN...SERN AR...NRN/CENTRAL MS...SWRN/SRN MIDDLE TN CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 040335Z - 040530Z CONVECTION APPEARS TO DEVELOPING ALONG THE SEWD MOVING FRONT OVER EXTREME NWRN MS...AND OVER PARTS OF SWRN AR. WW WILL LIKELY BE NEEDED BY 04Z. AIRMASS AHEAD OF THE FRONT IS WARM/MOIST WITH TEMPERATURES NEAR 70F AND DEW POINTS OF 60-65F. STRONG WSWLY WINDS ALOFT /500 MB FLOW OF 50-70 KT/ AND VEERING PROFILES IN THE LOWEST 1.5-2 KM AGL ARE CREATING A FAVORABLE ENVIRONMENT FOR ROTATING STORMS GIVEN PERSISTENT UPDRAFTS. 00Z ETA AND 02Z RUC BOTH INDICATE ADDITIONAL THUNDERSTORM DEVELOPMENT ALONG THE FRONT INTO THE OVERNIGHT HOURS. A NEW WATCH WILL LIKELY BE NEEDED TO BE ISSUED BY 04Z. ..WEISS.. 12/04/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OHX...BMX...HUN...MEG...JAN...LZK...SHV... 33219334 34339117 35248958 35668906 35698807 35568749 35408686 34828708 34138765 33668810 32719031 31959268 31989328 32289373 32899398
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 3, 10:01 PM CST | Tornado Watch | SPC | Colbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 8 more | 7 hr |
| Dec 4, 2:00 AM CST | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 19 more | 90 min |
| Dec 4, 12:24 PM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Calhoun and 31 more | 96 min |
| Dec 4, 1:18 PM CST | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Bullock, Calhoun, Chambers and 33 more | 6 hr |
| Dec 4, 3:30 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Bullock, Calhoun, Chambers, Chilton and 22 more | 90 min |
| Dec 4, 5:45 PM CST | Mesoscale Discussion | SPC | Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 2 more | 2 hr |
| Dec 4, 10:14 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Avoyelles, Beauregard, Calcasieu and 19 more | 2 hr |
| Dec 4, 11:39 AM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 25 more | 6 hr |
| Dec 4, 2:11 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Avoyelles, Beauregard, Calcasieu and 19 more | 2 hr |
| Dec 3, 7:15 PM CST | Mesoscale Discussion | SPC | Anderson, Benton, Campbell, Carroll, Cheatham, Clay and 32 more | 2 hr |
| Dec 3, 8:05 PM CST | Severe Thunderstorm Watch | SPC | Anderson, Benton, Campbell, Cannon, Carroll, Cheatham and 43 more | 7 hr |
| Dec 3, 11:38 PM CST | Mesoscale Discussion | SPC | Anderson, Campbell, Cheatham, Claiborne, Clay, Cumberland and 21 more | 2 hr |
Nearby
Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Louisiana, 2005Mesoscale Discussions in Tennessee, 2005Every mesoscale discussion in 2005
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.