Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 1863

October 13, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Oct 13, 2014, 1:59 AM CDT for 5 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Oct 13, 2014, 1:59 AM CDT (06:59 UTC)
Expired
Oct 13, 2014, 3:30 AM CDT
In force
91 min
Issued by
the Storm Prediction Center
All 95 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Chautauqua County, KS, Elk County, KS, Barry County, MO, Christian County, MO, Douglas County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Grayson County, TX, Hood County, TX, Irion County, TX, McCulloch County, TX, Mills County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, San Saba County, TX, Stephens County, TX, Tarrant County, TX, Tom Green County, TX, Wise County, TX

The radar

The Norman radar (KTLX), 151 km from the middle of the area, began a volume at 07:02 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

Norman, OK (KOUN), launched 00:00Z, 7.0 hours before the alert went out and 147 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, Norman, OK at 00:00Z on 2014-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 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, Norman, OK at 00:00Z on 2014-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 352 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
51 J/kg
Mixed-layer CIN
-430 J/kg
Mixed-layer LCL
1221 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
337 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Oct 12, 8:04 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 13 more86 min
Oct 13, 12:00 AM CDTMesoscale DiscussionSPCBenton, Crawford, Sebastian, Washington90 min
Oct 13, 12:55 AM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 27 more7 hr
Oct 13, 2:43 AM CDTMesoscale DiscussionSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more92 min
Oct 13, 3:22 AM CDTTornado WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more8 hr
Oct 13, 6:34 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 36 more86 min
Oct 13, 6:56 AM CDTMesoscale DiscussionSPCBaxter, Boone, Clark, Cleburne, Conway, Dallas and 17 more64 min
Oct 13, 7:08 AM CDTTornado WatchSPCArkansas, Ashley, Baxter, Bradley, Calhoun, Chicot and 44 more7 hr
Oct 13, 10:20 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Clay, Craighead and 22 more115 min
Oct 13, 11:52 AM CDTMesoscale DiscussionSPCChicot, Clay, Craighead, Crittenden, Cross, Desha and 6 more113 min
Oct 13, 12:57 PM CDTTornado WatchSPCChicot, Clay, Crittenden, Mississippi7 hr
Oct 12, 7:59 PM CDTSevere Thunderstorm WatchSPCChautauqua, Cowley, Elk, Sumner7 hr
Oct 12, 9:47 PM CDTMesoscale DiscussionSPCBarber, Harper, Sumner58 min
Oct 13, 8:05 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Howell, Iron and 13 more115 min
Oct 13, 10:29 AM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Franklin, Iron and 16 more8 hr
Oct 13, 11:59 AM CDTMesoscale DiscussionSPCBollinger, Butler, Madison, Perry, Sainte Genevieve, Saint Francois and 2 more61 min
Oct 13, 1:33 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more57 min
Oct 12, 7:45 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Borden, Brown, Callahan, Clay and 31 more7 hr
Oct 12, 10:17 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Delta, Denton, Ellis and 20 more58 min
Oct 12, 11:08 PM CDTTornado WatchSPCBosque, Collin, Comanche, Cooke, Coryell, Dallas and 29 more7 hr
Oct 13, 11:10 AM CDTTornado WatchSPCChambers, Hardin, Jasper, Jefferson, Liberty, Newton and 2 more8 hr

Nearby

Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Oklahoma, 2014Mesoscale Discussions in Texas, 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.