Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 271

April 3, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 8:16 PM CDT for 5 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2014, 8:16 PM CDT (01:16 UTC)
Expired
Apr 3, 2014, 9:15 PM CDT
In force
59 min
Issued by
the Storm Prediction Center
All 98 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Lonoke County, AR, Marion County, AR, Mississippi County, AR, Monroe County, AR, Newton County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy 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, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Wayne County, MO, Crockett County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 107 km from the middle of the area, began a volume at 01:19 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, 1.3 hours before the alert went out and 160 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, 8:30 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, 10:45 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 32 more60 min
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, 1:39 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Boone, Bourbon and 52 more3 hr
Apr 4, 2:12 AM CDTMesoscale DiscussionSPCCaldwell, Calloway, Christian, Hopkins, Lyon, McLean and 3 more63 min
Apr 4, 4:42 AM CDTMesoscale DiscussionSPCAdair, Casey, Clay, Clinton, Cumberland, Jackson and 12 more93 min
Apr 4, 4:58 AM CDTSevere Thunderstorm WatchSPCAdair, Bell, Breathitt, Casey, Clay, Clinton and 30 more5 hr
Apr 4, 7:41 AM CDTMesoscale DiscussionSPCBell, Breathitt, Clay, Floyd, Harlan, Jackson and 14 more49 min
Apr 4, 2:29 AM CDTMesoscale DiscussionSPCDecatur, Giles, Hardin, Lawrence, Lewis, Marshall and 3 more31 min
Apr 4, 2:52 AM CDTTornado WatchSPCBedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 30 more5 hr
Apr 4, 3:45 AM CDTMesoscale DiscussionSPCChester, Hardeman, Hardin, Henderson, McNairy60 min
Apr 4, 5:28 AM CDTMesoscale DiscussionSPCBedford, Cannon, Coffee, Cumberland, Davidson, DeKalb and 21 more92 min
Apr 4, 7:00 AM CDTMesoscale DiscussionSPCBlount, Cocke, Greene, Jefferson, Monroe, Polk and 1 more90 min

Nearby

Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Kentucky, 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.