Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 273

April 3, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 10:45 PM CDT for 4 states. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2014, 10:45 PM CDT (03:45 UTC)
Expired
Apr 3, 2014, 11:45 PM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 68 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery 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, Saline County, AR, Scott County, AR, Sebastian County, AR, St. Francis County, AR, Woodruff County, AR, Yell County, AR, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Humphreys County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Washington County, MS, Yalobusha County, MS, LeFlore County, OK, Chester County, TN, Fayette County, TN, Hardeman County, TN, Haywood County, TN, Madison County, TN, Shelby County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 52 km from the middle of the area, began a volume at 03:49 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 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 (KBYH), launched 00:00Z, 3.8 hours before the alert went out and 221 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, Little Rock, AR at 00:00Z on 2014-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 993 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, Little Rock, AR at 00:00Z on 2014-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 square meters per square second.1939587897Sfc1 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
993 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1599 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.2
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, 7:03 PM CDTMesoscale DiscussionSPCHempstead, Howard, Lafayette, Little River, Miller, Nevada and 1 more57 min
Apr 3, 7:26 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Fulton, Madison, Marion94 min
Apr 3, 8:16 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Crittenden and 29 more59 min
Apr 3, 8:30 PM CDTTornado WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more7 hr
Apr 3, 8:44 PM CDTMesoscale DiscussionSPCColumbia, Crawford, Franklin, Hempstead, Howard, Lafayette and 7 more31 min
Apr 3, 8:54 PM CDTTornado WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more7 hr
Apr 3, 11:40 PM CDTMesoscale DiscussionSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett95 min
Apr 4, 12:20 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 20 more55 min
Apr 4, 12:40 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 16 more5 hr
Apr 4, 12:55 AM CDTMesoscale DiscussionSPCCalhoun, Columbia, Union95 min
Apr 4, 2:29 AM CDTMesoscale DiscussionSPCAlcorn, Clay, Itawamba, Lee, Lowndes, Monroe and 3 more31 min
Apr 4, 2:52 AM CDTTornado WatchSPCClay, Kemper, Lauderdale, Lowndes, Neshoba, Newton and 4 more5 hr
Apr 4, 3:45 AM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 21 more60 min
Apr 4, 5:04 AM CDTMesoscale DiscussionSPCAmite, Copiah, Covington, Forrest, Franklin, Jasper and 12 more116 min
Apr 4, 5:25 AM CDTSevere Thunderstorm WatchSPCAdams, Amite, Claiborne, Clarke, Copiah, Covington and 31 more7 hr
Apr 4, 5:28 AM CDTMesoscale DiscussionSPCClaiborne, Hinds, Kemper, Lauderdale, Leake, Lowndes and 8 more92 min
Apr 4, 7:22 AM CDTMesoscale DiscussionSPCAmite, Clarke, Covington, Forrest, Franklin, Hancock and 14 more83 min
Apr 4, 10:12 AM CDTMesoscale DiscussionSPCAdams, Amite, Claiborne, Clarke, Copiah, Covington and 24 more63 min
Apr 4, 1:39 AM CDTMesoscale DiscussionSPCCheatham, Davidson, Dickson, Houston, Humphreys, Macon and 6 more3 hr
Apr 4, 2:12 AM CDTMesoscale DiscussionSPCDyer, Gibson, Henry, Obion, Stewart, Weakley63 min
Apr 4, 4:42 AM CDTMesoscale DiscussionSPCCampbell, Clay, Fentress, Jackson, Macon, Morgan and 7 more93 min
Apr 4, 4:58 AM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Campbell, Claiborne, Hamilton, Hancock and 8 more5 hr
Apr 4, 7:00 AM CDTMesoscale DiscussionSPCBlount, Cocke, Greene, Jefferson, Monroe, Polk and 1 more90 min
Apr 4, 7:41 AM CDTMesoscale DiscussionSPCAnderson, Campbell, Claiborne, Meigs, Morgan, Rhea and 3 more49 min

Nearby

Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Mississippi, 2014Mesoscale Discussions in Tennessee, 2014Every mesoscale discussion in 2014

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.