Alert archive / Arkansas / Mesoscale Discussions in 2003
Mesoscale Discussion 1313
The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 1:48 AM CDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2003, 1:48 AM CDT (06:48 UTC)
- Expired
- Jun 11, 2003, 4:45 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 58 counties
Baxter County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Columbia County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Lafayette County, AR, Lawrence County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Carter County, MO, Douglas County, MO, Howell County, MO, Oregon County, MO, Ozark County, MO, Ripley County, MO, Shannon County, MO, Taney County, MO, Adair County, OK, LeFlore County, OK, McCurtain County, OK, Sequoyah County, OK, Bowie County, TX, Cass County, TX, Morris County, TX
The radar
The Little Rock radar (KLZK), 68 km from the middle of the area, began a volume at 06:49 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
Springfield, MO (KSGF), launched 00:00Z, 6.8 hours before the alert went out and 233 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
- 3276 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 919 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
563 ACUS11 KWNS 110648 SWOMCD SPC MCD 110648 ARZ000-MOZ000-LAZ000-TXZ000-OKZ000-110945- MESOSCALE DISCUSSION 1313 NWS STORM PREDICTION CENTER NORMAN OK 0148 AM CDT WED JUN 11 2003 AREAS AFFECTED...SRN MO...NRN AND WRN AR...EXTREME ERN AR...NERN TX...NWRN LA CONCERNING...SEVERE THUNDERSTORM POTENTIAL...HEAVY RAINFALL VALID 110648Z - 110945Z WE ARE MONITORING AREAS OF WRN AR/NERN TX/NWRN LA FOR SEVERE THUNDERSTORM WATCH. SATELLITE IMAGERY SHOWS TWO MCSS OVER MO/IL AND OK THAT LOOK TO BE GENERATING INTO A THIRD MCS OVER AR. COMBINATION OF CONVECTIVE BOUNDARY FORMING FROM SERN MO WSWWD INTO NWRN AR...AND BOWING SQUALL LINE OVER ERN OK/NERN TX WILL MERGE DURING THE NEXT SEVERAL HOURS OVER NWRN AR. THIS WILL LEAD TO CONVECTION FILLING IN OVER S CENTRAL MO AS WELL AS MERGING OF SQUALL LINE WITH CONVECTIVE CLUSTER OVER W CENTRAL AR. PROFILER/VAD WIND DATA INDICATES FAVORABLE SHEAR FOR FORMATION OF ADDITIONAL CELLS INCREASING ALREADY PRESENT HEAVY RAIN THREAT WITH PRECIPITABLE WATER VALUES OF 1.50 TO 1.80. THIS COMBINED WITH MLCAPES BETWEEN 1500 AND 2000 J/KG INDICATES THE POTENTIAL FOR WET MICROBURSTS SOME HAIL NEXT SEVERAL HOURS. ..MCCARTHY.. 06/11/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...PAH...MEG...LSX...LZK...SGF...SHV...TSA... 32799429 33049487 34349488 36049482 37059271 37229106 36719055 35689104 35599208 34379266 33309273
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 9:38 PM CDT | Mesoscale Discussion | SPC | Benton, Crawford, Franklin, Polk, Scott, Sebastian and 1 more | 2 hr |
| Jun 11, 4:53 AM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Chicot, Clay, Cleburne, Cleveland and 25 more | 3 hr |
| Jun 11, 6:10 AM CDT | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more | 5 hr |
| Jun 11, 7:54 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more | 2 hr |
| Jun 11, 1:53 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more | 67 min |
| Jun 10, 7:28 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bollinger, Camden, Cape Girardeau, Cedar and 29 more | 3 hr |
| Jun 11, 3:25 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Greer, Harmon, Jackson, Jefferson and 3 more | 2 hr |
| Jun 11, 4:40 PM CDT | Tornado Watch | SPC | Beaver, Beckham, Cotton, Ellis, Greer, Harmon and 5 more | 5 hr |
| Jun 11, 6:32 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 32 more | 58 min |
| Jun 11, 1:20 AM CDT | Mesoscale Discussion | SPC | Anderson, Archer, Bosque, Camp, Cherokee, Clay and 29 more | 115 min |
| Jun 11, 12:59 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Kimble, Schleicher, Sutton, Terrell and 1 more | 91 min |
| Jun 11, 3:55 PM CDT | Tornado Watch | SPC | Borden, Callahan, Coke, Coleman, Concho, Crockett and 31 more | 5 hr |
Nearby
Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Oklahoma, 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.