Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1313

June 11, 20034 states

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.

Skew-T log-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2003-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3276 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2003-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Jun 10, 9:38 PM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Polk, Scott, Sebastian and 1 more2 hr
Jun 11, 4:53 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Chicot, Clay, Cleburne, Cleveland and 25 more3 hr
Jun 11, 6:10 AM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more5 hr
Jun 11, 7:54 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more2 hr
Jun 11, 1:53 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more67 min
Jun 10, 7:28 PM CDTMesoscale DiscussionSPCBarry, Barton, Bollinger, Camden, Cape Girardeau, Cedar and 29 more3 hr
Jun 11, 3:25 PM CDTMesoscale DiscussionSPCComanche, Cotton, Greer, Harmon, Jackson, Jefferson and 3 more2 hr
Jun 11, 4:40 PM CDTTornado WatchSPCBeaver, Beckham, Cotton, Ellis, Greer, Harmon and 5 more5 hr
Jun 11, 6:32 PM CDTMesoscale DiscussionSPCAlfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 32 more58 min
Jun 11, 1:20 AM CDTMesoscale DiscussionSPCAnderson, Archer, Bosque, Camp, Cherokee, Clay and 29 more115 min
Jun 11, 12:59 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Kimble, Schleicher, Sutton, Terrell and 1 more91 min
Jun 11, 3:55 PM CDTTornado WatchSPCBorden, Callahan, Coke, Coleman, Concho, Crockett and 31 more5 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.