Alert archive / Arkansas / Mesoscale Discussions in 2003
Mesoscale Discussion 702
The Storm Prediction Center issued this mesoscale discussion at May 3, 2003, 2:36 AM CDT for 32 counties in Arkansas; 15 parishes in Louisiana; 18 counties in Mississippi. It was in force for 24 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2003, 2:36 AM CDT (07:36 UTC)
- Expired
- May 3, 2003, 3:00 AM CDT
- In force
- 24 min
- Issued by
- the Storm Prediction Center
All 65 counties
Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Grant County, AR, Independence County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Perry County, AR, Phillips County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Caldwell Parish, LA, Catahoula Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS
The radar
The Little Rock radar (KLZK), 94 km from the middle of the area, began a volume at 07:35 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, 7.6 hours before the alert went out and 196 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
- 1060 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 968 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
251 ACUS11 KWNS 030737 SWOMCD SPC MCD 030736 MSZ000-TNZ000-ARZ000-LAZ000-030800- MESOSCALE DISCUSSION 0702 NWS STORM PREDICTION CENTER NORMAN OK 0236 AM CDT SAT MAY 03 2003 AREAS AFFECTED...CENTRAL AND SRN AR / NRN LA... CONCERNING...SEVERE THUNDERSTORM WATCH 217... VALID 030736Z - 030800Z CONVECTION HAS MOVED OUT OF WW AREA...AND WATCH WILL BE ALLOWED TO EXPIRE AS SCHEDULED AT 03/08Z. IT APPEARS ATTM THAT NEW WW WILL NOT BE REQUIRED ACROSS AR / LA AS OVERALL THREAT SHOULD REMAIN LIMITED. LATEST SURFACE ANALYSIS SHOWS WARM FRONT ACROSS NRN LA...WITH ELEVATED CONVECTION CONTINUING TO DEVELOP OVER NRN AND ERN AR IN AREA OF WEAK WARM ADVECTION ASSOCIATED WITH 20 KT SWLY LOW-LEVEL JET. IN ADDITION...ISOLATED / MORE SURFACE-BASED SEVERE STORMS CONTINUE TO MOVE SEWD ACROSS NRN LA THROUGH MODERATELY-UNSTABLE AIRMASS. CONVECTION HAS MOVED OUT OF WW AREA...SO WW WILL BE ALLOWED TO EXPIRE. N AND E OF WW...MAIN SEVERE THREAT SHOULD REMAIN MARGINALLY-SEVERE HAIL GIVEN RELATIVELY WEAK INSTABILITY AND STABLE BOUNDARY LAYER. THREAT FOR LARGER HAIL AND LOCALLY DAMAGING WINDS WILL LIKELY PERSIST FOR THE NEXT COUPLE OF HOURS NRN LA WHERE MODERATE SURFACE-BASED INSTABILITY EXISTS ALONG WITH DEEP-LAYER WINDS WHICH VEER / INCREASE WITH HEIGHT. HOWEVER...STORM COVERAGE IS NOT EXPECTED TO INCREASE SIGNIFICANTLY AS STRONGEST WARM ADVECTION / LOW-LEVEL FORCING SHOULD REMAIN ACROSS AR N OF SURFACE BOUNDARY. THEREFORE...IT APPEARS ATTM THAT THREAT SHOULD REMAIN SUFFICIENTLY ISOLATED TO PRECLUDE NEW WW ISSUANCE. ..GOSS.. 05/03/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MEG...JAN...LZK...SHV... 35249327 35839293 35939190 34818979 33738968 32649048 31669163 31599302 33909269
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 9:30 PM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 13 more | 2 hr |
| May 2, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more | 5 hr |
| May 2, 11:42 PM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more | 93 min |
| May 3, 12:29 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 2 more | 3 hr |
| May 3, 1:40 PM CDT | Tornado Watch | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 6 hr |
| May 3, 3:42 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 2 hr |
| May 3, 6:49 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 56 min |
| May 3, 4:36 PM CDT | Mesoscale Discussion | SPC | Livingston, Orleans, Saint Charles, Saint Helena, Saint John the Baptist, Saint Tammany and 2 more | 114 min |
| May 3, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Concordia, East Baton Rouge, East Carroll, East Feliciana, Franklin, Livingston and 9 more | 5 hr |
| May 3, 9:15 AM CDT | Severe Thunderstorm Watch | SPC | Forrest, George, Greene, Harrison, Jackson, Jones and 3 more | 6 hr |
| May 3, 11:24 AM CDT | Mesoscale Discussion | SPC | George, Greene, Jackson, Perry, Stone | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Louisiana, 2003Every mesoscale discussion in 2003
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.