Alert archive / Louisiana / Mesoscale Discussions in 2008
Mesoscale Discussion 331
The Storm Prediction Center issued this mesoscale discussion at Mar 3, 2008, 1:25 PM CST for 4 counties in Arkansas; 26 parishes in Louisiana; 25 counties in Mississippi. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Mar 3, 2008, 1:25 PM CST (19:25 UTC)
- Expired
- Mar 3, 2008, 3:00 PM CST
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 55 counties
Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Avoyelles Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Landry Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Rankin County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 117 km from the middle of the area, began a volume at 19:27 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 12:00Z, 7.4 hours before the alert went out and 109 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
- 655 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 313 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 031925 SWOMCD SPC MCD 031925 MSZ000-ARZ000-LAZ000-032100- MESOSCALE DISCUSSION 0331 NWS STORM PREDICTION CENTER NORMAN OK 0125 PM CST MON MAR 03 2008 AREAS AFFECTED...ERN LA...SE AR AND WRN MS CONCERNING...SEVERE THUNDERSTORM WATCH 91... VALID 031925Z - 032100Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 91 CONTINUES. A SEVERE THREAT WILL CONTINUE ACROSS WW 91 GRADUALLY SPREADING EWD ACROSS ERN LA INTO WRN MS BY LATE THIS AFTERNOON. A TORNADO THREAT ALONG WITH WIND DAMAGE AND HAIL WILL BE POSSIBLE WITH THE BETTER ORGANIZED CELLS. A NEW WW WILL LIKELY BE NECESSARY OVER THE NEXT 1 TO 2 HOURS. LATEST SFC ANALYSIS SHOWS A DEEPENING 1003 MB SFC LOW IN SRN AR WITH A COLD FRONT EXTENDING SSWWD ACROSS NW LA INTO SE TX. SFC DEWPOINTS ARE INCREASING EAST OF THE BOUNDARY AND MID TO UPPER 60S F ARE PRESENT AS FAR NORTH AS INTERSTATE 20 IN NRN LA. OBJECTIVE ANALYSIS SUGGESTS THE AIRMASS HAS BECOME MODERATELY UNSTABLE ALONG THE MOIST AXIS IN CNTRL LA AND THIS MAY ALLOW STORMS TO BECOME INCREASINGLY ORGANIZED THROUGH LATE THIS AFTERNOON. THE MOIST AXIS AND ASSOCIATED 50 TO 60 KT LOW-LEVEL JET IS FORECAST TO SHIFT EWD INTO MS LATE THIS AFTERNOON INCREASING THE SEVERE POTENTIAL EAST OF WW 91. STRONG LOW-LEVEL SHEAR PROFILES EVIDENT ON THE JACKSON MS WSR-88D VWP SUGGESTS A FEW TORNADOES AND WIND DAMAGE WILL BE POSSIBLE WITH THE STRONGER CELLS EMBEDDED IN THE LINE. THE TORNADO THREAT SHOULD BE GREATEST WITH SUPERCELLS THAT REMAIN DISCRETE AHEAD OF THE LINE. ..BROYLES.. 03/03/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MEG...JAN...LIX...LZK...LCH...SHV... 30399124 30309222 31119325 31929309 33319212 33999132 34199082 33969005 33268940 32318965 31449035
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 8:23 PM CST | Tornado Watch | SPC | Crawford, Franklin, Howard, Little River, Miller, Polk and 3 more | 8 hr |
| Mar 3, 1:36 AM CST | Mesoscale Discussion | SPC | Howard, Little River, Logan, Montgomery, Pike, Polk and 3 more | 54 min |
| Mar 3, 3:01 AM CST | Mesoscale Discussion | SPC | Clark, Cleburne, Conway, Dallas, Faulkner, Garland and 20 more | 89 min |
| Mar 3, 5:21 AM CST | Mesoscale Discussion | SPC | Lafayette, Miller | 84 min |
| Mar 3, 6:47 AM CST | Severe Thunderstorm Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 6 hr |
| Mar 3, 10:18 AM CST | Mesoscale Discussion | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 87 min |
| Mar 3, 10:36 AM CST | Tornado Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Columbia and 8 more | 9 hr |
| Mar 3, 2:25 PM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 11 hr |
| Mar 3, 5:58 PM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 62 min |
Nearby
Mesoscale Discussions in Louisiana, 2008Mesoscale Discussions in Mississippi, 2008Mesoscale Discussions in Arkansas, 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.