Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 547

April 3, 20087 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2008, 11:19 PM CDT for 7 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2008, 11:19 PM CDT (04:19 UTC)
Expired
Apr 4, 2008, 12:45 AM CDT
In force
86 min
Issued by
the Storm Prediction Center
All 123 counties

Arkansas County, AR, Calhoun County, AR, Clark 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, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Sevier County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Marshall County, KY, McCracken County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Stoddard County, MO, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Jefferson County, OK, Johnston County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, Pushmataha County, OK, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN, Archer County, TX, Bowie County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Lamar County, TX, Montague County, TX, Red River County, TX, Titus County, TX, Wise County, TX, Young County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 4.3 hours before the alert went out and 245 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, Shreveport, LA at 00:00Z on 2008-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1498 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, Shreveport, LA at 00:00Z on 2008-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.19395878Sfc1 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
1498 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1191 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 3, 7:59 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Calhoun, Carroll, Clark and 46 more91 min
Apr 3, 8:21 PM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Benton, Boone, Calhoun, Carroll and 52 more8 hr
Apr 3, 9:49 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Clark, Clay, Cleburne and 55 more86 min
Apr 3, 10:23 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more4 hr
Apr 4, 12:48 AM CDTMesoscale DiscussionSPCBradley, Calhoun, Columbia, Hempstead, Lafayette, Little River and 4 more117 min
Apr 4, 1:28 AM CDTMesoscale DiscussionSPCCrittenden, Lee2 hr
Apr 4, 2:46 AM CDTSevere Thunderstorm WatchSPCLee, Phillips8 hr
Apr 4, 3:34 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 15 more56 min
Apr 4, 3:55 AM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more7 hr
Apr 4, 7:55 AM CDTMesoscale DiscussionSPCAshley, Chicot2 hr
Apr 4, 5:16 AM CDTMesoscale DiscussionSPCBell, Breathitt, Clay, Clinton, Elliott, Harlan and 16 more89 min
Apr 4, 9:48 AM CDTTornado WatchSPCAdams, Amite, Attala, Carroll, Choctaw, Claiborne and 43 more9 hr
Apr 4, 12:01 PM CDTMesoscale DiscussionSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 18 more89 min
Apr 4, 5:02 PM CDTMesoscale DiscussionSPCAmite, Clarke, Covington, Forrest, George, Greene and 16 more88 min
Apr 4, 5:48 PM CDTTornado WatchSPCAmite, Forrest, George, Greene, Hancock, Harrison and 10 more6 hr
Apr 3, 8:33 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Coal, Comanche, Cotton and 10 more9 hr
Apr 4, 1:22 AM CDTSevere Thunderstorm WatchSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 47 more9 hr
Apr 4, 4:14 AM CDTMesoscale DiscussionSPCAnderson, Bandera, Bastrop, Bell, Bexar, Blanco and 48 more91 min
Apr 4, 5:34 AM CDTSevere Thunderstorm WatchSPCAnderson, Angelina, Austin, Bastrop, Brazos, Burleson and 32 more6 hr
Apr 4, 4:06 PM CDTMesoscale DiscussionSPCHardin, Newton, Orange84 min

Nearby

Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Texas, 2008Mesoscale Discussions in Tennessee, 2008Every mesoscale discussion in 2008

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.