Alert archive / Arkansas / Mesoscale Discussions in 2003
Mesoscale Discussion 569
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2003, 9:03 PM CDT for 39 counties in Arkansas; 7 counties in Mississippi; 13 counties in Missouri. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2003, 9:03 PM CDT (02:03 UTC)
- Expired
- Apr 24, 2003, 11:00 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 59 counties
Arkansas County, AR, Baxter County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Faulkner County, AR, Fulton County, AR, Grant County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Marion County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Butler County, MO, Carter County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Oregon County, MO, Ozark County, MO, Ripley County, MO, Shannon County, MO, Texas County, MO, Wayne County, MO, Webster County, MO, Wright County, MO, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tunica County, MS
The radar
The Little Rock radar (KLZK), 61 km from the middle of the area, began a volume at 02:03 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
Little Rock, AR (KLZK), launched 00:00Z, 2.1 hours before the alert went out and 162 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
- 2140 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 10.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 250203 SWOMCD SPC MCD 250203 TNZ000-MSZ000-ARZ000-MOZ000-250400- MESOSCALE DISCUSSION 0569 NWS STORM PREDICTION CENTER NORMAN OK 0903 PM CDT THU APR 24 2003 AREAS AFFECTED...SRN MO / CENTRAL AND ERN AR / NWRN MS / FAR WRN TN CONCERNING...TORNADO WATCH 160... VALID 250203Z - 250400Z SEVERE THREAT CONTINUES ACROSS ALL OF WW AREA. LATEST RADAR LOOP SHOWS SEVERAL CLUSTERS OF SEVERE STORMS / SUPERCELLS IN AND NEAR WW #160 ATTM. STORMS ALONG SRN FRINGE OF WW HAVE SHOWN A TENDENCY TO SPLIT...RESULTING IN SEVERAL LEFT-MOVING / ANTICYCLONIC SUPERCELLS. MODERATELY-UNSTABLE AIRMASS REMAINS ACROSS THE REGION BASED ON EVENING RAOBS AND LATEST OBJECTIVE ANALYSES...AND LATEST VWP / PROFILER DATA CONTINUES TO SHOW FAVORABLE DEEP-LAYER WIND PROFILE FOR A CONTINUATION OF THE THREAT FOR ISOLATED TORNADOES ALONG WITH DAMAGING WINDS AND LARGE HAIL. ..GOSS.. 04/25/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...PAH...MEG...JAN...LSX...LZK...SGF... 33659272 37349301 37339010 33658992
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:50 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Drew | 4 hr |
| Apr 24, 10:51 PM CDT | Mesoscale Discussion | SPC | Ashley, Chicot, Drew | 84 min |
| Apr 24, 11:45 PM CDT | Tornado Watch | SPC | Craighead, Crittenden, Cross, Greene, Lawrence, Lee and 4 more | 5 hr |
| Apr 25, 1:15 AM CDT | Mesoscale Discussion | SPC | Crittenden, Mississippi | 90 min |
| Apr 25, 3:05 AM CDT | Mesoscale Discussion | SPC | Mississippi | 85 min |
| Apr 25, 11:04 AM CDT | Mesoscale Discussion | SPC | Alcorn, Itawamba, Lee, Prentiss, Tishomingo | 116 min |
| Apr 25, 12:59 PM CDT | Mesoscale Discussion | SPC | Clarke, Covington, Jasper, Jefferson Davis, Jones, Lamar and 5 more | 2 hr |
| Apr 25, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | Amite, Covington, Forrest, Franklin, George, Greene and 13 more | 5 hr |
| Apr 25, 5:40 PM CDT | Tornado Watch | SPC | Covington, Forrest, George, Greene, Jefferson Davis, Jones and 6 more | 5 hr |
Nearby
Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Mississippi, 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.