Alert archive / Mississippi / Mesoscale Discussions in 2008
Mesoscale Discussion 252
The Storm Prediction Center issued this mesoscale discussion at Feb 17, 2008, 4:19 AM CST for 5 counties in Alabama; 40 counties in Mississippi. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Feb 17, 2008, 4:19 AM CST (10:19 UTC)
- Expired
- Feb 17, 2008, 5:15 AM CST
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 45 counties
Colbert County, AL, Franklin County, AL, Lamar County, AL, Marion County, AL, Pickens County, AL, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Kemper County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha 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, Union County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS
The radar
The Columbus AFB radar (KGWX), 91 km from the middle of the area, began a volume at 10:20 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 nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 10.3 hours before the alert went out and 158 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
- 550 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 358 m²/s²
- 0-3 km storm-relative helicity
- 624 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 171019 SWOMCD SPC MCD 171019 ALZ000-MSZ000-ARZ000-171115- MESOSCALE DISCUSSION 0252 NWS STORM PREDICTION CENTER NORMAN OK 0419 AM CST SUN FEB 17 2008 AREAS AFFECTED...PARTS OF CENTRAL/NERN MS CONCERNING...SEVERE THUNDERSTORM WATCH 60... VALID 171019Z - 171115Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 60 CONTINUES. WW 60 WILL BE ALLOWED TO EXPIRE...AS SCHEDULED AT 11Z. ONGOING TSTMS ALONG NRN EXTENT OF SQUALL LINE...NOW MOVING THROUGH CENTRAL MS...HAVE CONTINUED TO SHOW SIGNS OF DECREASING INTENSITY AS INDICATED BY RECENT TRENDS IN LIGHTNING DATA. HEIGHTS ARE EXPECTED TO FALL ACROSS NRN MS/NWRN AL AS UPPER LOW/TROUGH APPROACHES THE MID MS VALLEY...RESULTING IN COOLING 850-500 MB TEMPERATURES PER 07Z RUC SOUNDINGS VALID THROUGH THIS MORNING. THIS COMBINED WITH MOISTENING LOW LEVELS SHOULD WEAKEN THE CAP. HOWEVER...AT LEAST IN THE SHORT TERM /THROUGH ABOUT MID MORNING/...TSTM ACTIVITY IS EXPECTED TO REMAIN ELEVATED...AND THUS LIMIT THE NRN EXTENT OF SEVERE WEATHER. GIVEN STRENGTH OF WIND FLOW JUST OFF THE SURFACE /45-50 KT AOB 1 KM PER AREA WSR-88D VWP AND WIND PROFILER DATA/...A FEW STRONGER WIND GUSTS COULD STILL REACH THE SURFACE...BUT OVERALL WIND THREAT IS EXPECTED TO REMAIN LOW ENOUGH TO PRECLUDE ISSUANCE OF A NEW WW TO THE NE OF WW 60. ..PETERS.. 02/17/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...BMX...HUN...MEG...JAN... 32768840 32638905 32589027 32449070 33079084 34329067 34928963 35008808 34778763 33758776
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 2:13 AM CST | Mesoscale Discussion | SPC | Mobile | 32 min |
| Feb 17, 5:05 AM CST | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Conecuh, Dallas, Escambia and 8 more | 55 min |
| Feb 17, 5:26 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Butler, Choctaw, Clarke, Conecuh and 14 more | 7 hr |
| Feb 17, 7:13 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Butler, Chilton, Choctaw, Clarke and 16 more | 62 min |
| Feb 17, 9:43 AM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Butler, Chilton, Choctaw, Clarke and 17 more | 62 min |
| Feb 17, 12:14 PM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Chambers, Clay, Coffee and 16 more | 91 min |
| Feb 17, 12:32 PM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 28 more | 7 hr |
| Feb 17, 2:45 PM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 22 more | 90 min |
| Feb 17, 5:19 PM CST | Mesoscale Discussion | SPC | Chambers, Dale, Geneva, Henry, Houston | 86 min |
| Feb 16, 10:41 PM CST | Mesoscale Discussion | SPC | Adams, Issaquena, Washington | 94 min |
| Feb 16, 11:30 PM CST | Severe Thunderstorm Watch | SPC | Adams, Amite, Attala, Bolivar, Carroll, Claiborne and 25 more | 6 hr |
| Feb 17, 2:45 AM CST | Tornado Watch | SPC | Amite, Claiborne, Clarke, Copiah, Covington, Forrest and 23 more | 5 hr |
Nearby
Mesoscale Discussions in Mississippi, 2008Mesoscale Discussions in Alabama, 2008Every mesoscale discussion in 2008
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.