Alert archive / Mississippi / Mesoscale Discussions in 2004
Mesoscale Discussion 178
The Storm Prediction Center issued this mesoscale discussion at Mar 5, 2004, 9:08 PM CST for 13 counties in Alabama; 25 counties in Mississippi; Lawrence County, Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 5, 2004, 9:08 PM CST (03:08 UTC)
- Expired
- Mar 5, 2004, 11:15 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Pickens County, AL, Walker County, AL, Winston County, AL, Attala County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Hinds County, MS, Itawamba County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Webster County, MS, Winston County, MS, Lawrence County, TN
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 3.1 hours before the alert went out and 132 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
- 427 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 269 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
781 ACUS11 KWNS 060308 SWOMCD SPC MCD 060308 ALZ000-TNZ000-MSZ000-060515- MESOSCALE DISCUSSION 0178 NWS STORM PREDICTION CENTER NORMAN OK 0908 PM CST FRI MAR 05 2004 AREAS AFFECTED...MS...NW AL...FAR SCNTRL TN CONCERNING...TORNADO WATCH 27... VALID 060308Z - 060515Z SUPERCELLS ARE ONGOING ACROSS NERN MS...NWRN AL AND FAR SCNTRL TN. AN ISOLATED TORNADO THREAT WILL CONTINUE TO ACCOMPANY THE STORMS ACROSS THE NORTHERN PART OF TORNADO WATCH 27. CONVECTION IS CURRENTLY DEVELOPING ACROSS THE SRN PART OF THE WATCH AND MAY POSE A SEVERE THREAT WITHIN THE NEXT HOUR OR TWO. IF THE STRENGTH OF THE CONVECTION REMAINS STRONG OVER THE NEXT TWO HOURS...ANOTHER WATCH MAY BE NEEDED. A NEARLY STATIONARY BOUNDARY IS CURRENTLY LOCATED FROM FAR SWRN MS EXTENDING NEWD TO FAR NRN AL. STRONG LOW-LEVEL CONVERGENCE ALONG THE BOUNDARY SHOULD WILL CONTINUE TO SUPPORT SUPERCELLS IN THE NRN PART OF THE TORNADO WATCH EVEN THOUGH INSTABILITY HAS DECREASED THERE SOMEWHAT. AS INSTABILITY DECREASES...A DOWNWARD TREND IN THE CONVECTION SHOULD BEGIN. FARTHER SOUTH ACROSS SRN MS...INSTABILITY HAS REMAINED STEADY AND MODERATE LOW-LEVEL CONVERGENCE CONTINUED. THIS MAY RESULT IN THE DEVELOPMENT OF ADDITIONAL SUPERCELL STORMS OVER THE NEXT FEW HOURS IN THE SRN PART OF THE TORNADO WATCH. ..BROYLES.. 03/06/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OHX...BMX...HUN...MEG...JAN... 31619105 32669025 34008897 35278762 35048614 33188776 31588941
Nearby
Mesoscale Discussions in Mississippi, 2004Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Tennessee, 2004Every mesoscale discussion in 2004
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.