Alert archive / Mississippi / Mesoscale Discussions in 2006
Mesoscale Discussion 821
The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 4:01 AM CDT for 7 counties in Alabama; 16 counties in Mississippi. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2006, 4:01 AM CDT (09:01 UTC)
- Expired
- May 10, 2006, 5:30 AM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 23 counties
Fayette County, AL, Greene County, AL, Hale County, AL, Lamar County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Attala County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Holmes County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Lowndes County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Webster County, MS, Winston County, MS
The radar
The Columbus AFB radar (KGWX), 83 km from the middle of the area, began a volume at 09:01 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
Jackson, MS (KJAN), launched 00:00Z, 9.0 hours before the alert went out and 167 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
- 3836 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 299 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 15.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 100901 SWOMCD SPC MCD 100901 ARZ000-TXZ000-OKZ000-101030- MESOSCALE DISCUSSION 0820 NWS STORM PREDICTION CENTER NORMAN OK 0401 AM CDT WED MAY 10 2006 AREAS AFFECTED...SRN OK...EXTREME NERN TX AND CNTRL/WRN AR CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 100901Z - 101030Z WEATHER WATCHES MAY NEED TO BE REALIGNED ACROSS THE REGION BY 10Z OR SO. A SECONDARY MID-LEVEL IMPULSE WAS MOVING INTO WRN OK THIS MORNING AND APPEARS TO BE LARGELY RESPONSIBLE FOR THE TSTM CLUSTER MOVING INTO CNTRL/SWRN OK AND WRN N TX. MESOANALYSIS PLACES A COLD FRONT ARCING FROM NWRN AR ACROSS SERN OK...THEN WWD ALONG THE RED RIVER INTO THE VERNON TX AREA. TSTMS HAVE RECENTLY INTENSIFIED ALONG THIS FRONT FROM NEAR FORT SMITH TO PARIS TX...AS THE UPSTREAM WAVE APPROACHES THE REGION. SWLY LOW-LEVEL JET HAS MAINTAINED A FLOW OF UNSTABLE PARCELS FROM N TX INTO OK AND AR THE PAST SEVERAL HOURS. VERY STEEP LAPSE RATES ALOFT WILL MAINTAIN A LARGE HAIL THREAT. MOREOVER...A 50-60 KT MID-LEVEL JET ASSOCD WITH THE IMPULSE WILL CONTINUE TO PROVIDE SUFFICIENT VERTICAL SHEAR FOR SUPERCELL STRUCTURES EMBEDDED WITHIN LINEAR SEGMENTS. THE LINES WILL TEND TO BOW AND PRODUCE DAMAGING WINDS. THE GREATEST SEVERE RISK APPEARS TO BE ACROSS EXTREME NERN TX INTO PARTS OF WRN AR...BUT THE SRN-MOST CELLS ACROSS WRN N TX/SWRN OK MAY REMAIN POTENTIALLY SEVERE AS THEY MOVE INTO SWRN/SCNTRL OK. ..RACY.. 05/10/2006 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LZK...SHV...TSA...FWD...OUN... 34739973 35449879 35539579 35679323 34439260 33419330 32989532 33189686
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 9:54 PM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Butler, Clarke, Coffee, Conecuh and 13 more | 2 hr |
| May 10, 2:05 AM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 3 more | 55 min |
| May 10, 2:24 AM CDT | Severe Thunderstorm Watch | SPC | Colbert, Fayette, Franklin, Greene, Hale, Lamar and 5 more | 5 hr |
| May 10, 5:47 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 30 more | 88 min |
| May 10, 6:32 AM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 25 more | 6 hr |
| May 10, 8:31 AM CDT | Mesoscale Discussion | SPC | Fayette, Greene, Lamar, Pickens, Tuscaloosa | 89 min |
| May 10, 9:48 AM CDT | Severe Thunderstorm Watch | SPC | Colbert, Cullman, Fayette, Franklin, Greene, Hale and 12 more | 5 hr |
| May 10, 12:21 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 18 more | 84 min |
| May 10, 12:31 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Bullock, Calhoun, Chambers and 18 more | 5 hr |
| May 10, 12:42 PM CDT | Mesoscale Discussion | SPC | Barbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more | 93 min |
| May 10, 1:45 PM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 26 more | 7 hr |
| May 10, 2:42 PM CDT | Mesoscale Discussion | SPC | Choctaw, Clarke, Marengo, Sumter, Washington, Wilcox | 2 hr |
| May 10, 3:23 PM CDT | Mesoscale Discussion | SPC | Barbour, Chambers, Lee, Macon, Russell | 2 hr |
| May 10, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Bolivar, Carroll, Coahoma, DeSoto, Grenada and 13 more | 7 hr |
| May 10, 6:27 AM CDT | Mesoscale Discussion | SPC | Bolivar, Coahoma, DeSoto, Leflore, Panola, Quitman and 5 more | 93 min |
| May 10, 10:57 AM CDT | Mesoscale Discussion | SPC | Attala, Claiborne, Copiah, Covington, Franklin, Hinds and 19 more | 2 hr |
| May 10, 11:09 AM CDT | Severe Thunderstorm Watch | SPC | Bolivar, Coahoma, Humphreys, Leflore, Quitman, Sharkey and 3 more | 3 hr |
| May 10, 12:03 PM CDT | Tornado Watch | SPC | Adams, Claiborne, Clarke, Copiah, Covington, Franklin and 21 more | 9 hr |
| May 10, 6:05 PM CDT | Mesoscale Discussion | SPC | Amite, Pike, Walthall, Wilkinson | 85 min |
Nearby
Mesoscale Discussions in Mississippi, 2006Mesoscale Discussions in Alabama, 2006Every mesoscale discussion in 2006
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.