Alert archive / Arkansas / Mesoscale Discussions in 2023

Mesoscale Discussion 484

April 5, 20236 states

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2023, 11:51 AM CDT for 6 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Apr 5, 2023, 11:51 AM CDT (16:51 UTC)
Expired
Apr 5, 2023, 1:15 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 126
All 55 counties

Arkansas County, AR, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Lee County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Alexander County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Stoddard County, MO, Coahoma County, MS, DeSoto County, MS, Quitman County, MS, Tate County, MS, Tunica County, MS, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 76 km from the middle of the area, began a volume at 16:55 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

Nashville Metro, TN (KBNA), launched 12:00Z, 4.9 hours before the alert went out and 277 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, Nashville Metro, TN at 12:00Z on 2023-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 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, Nashville Metro, TN at 12:00Z on 2023-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 273 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
57 J/kg
Mixed-layer CIN
-339 J/kg
Mixed-layer LCL
1182 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
273 m²/s²
0-3 km storm-relative helicity
296 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 8:46 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 19 more119 min
Apr 5, 12:56 AM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Cross and 25 more94 min
Apr 5, 1:32 AM CDTTornado WatchSPCBaxter, Clay, Cleburne, Conway, Craighead, Faulkner and 23 more9 hr
Apr 5, 2:03 AM CDTMesoscale DiscussionSPCConway, Izard, Sharp, Stone, Van Buren87 min
Apr 5, 2:27 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Madison, Washington10 hr
Apr 5, 4:25 AM CDTMesoscale DiscussionSPCClark, Garland, Hempstead, Hot Spring, Howard, Little River and 10 more95 min
Apr 5, 4:54 AM CDTTornado WatchSPCBenton, Boone, Carroll, Crawford, Franklin, Hempstead and 18 more6 hr
Apr 5, 6:25 AM CDTMesoscale DiscussionSPCBoone, Marion95 min
Apr 5, 8:44 AM CDTTornado WatchSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 39 more7 hr
Apr 4, 7:54 PM CDTMesoscale DiscussionSPCLivingston, McLean, Tazewell, Woodford96 min
Apr 4, 9:58 PM CDTSevere Thunderstorm WatchSPCCarroll, Mercer, Rock Island6 hr
Apr 5, 3:27 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 48 more93 min
Apr 5, 3:48 AM CDTMesoscale DiscussionSPCJackson, Union, Williamson27 min
Apr 5, 3:57 AM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, Cass, Champaign, Christian and 59 more8 hr
Apr 5, 5:19 AM CDTMesoscale DiscussionSPCCrawford, Edwards, Lawrence, Richland, Wabash86 min
Apr 5, 9:09 AM CDTMesoscale DiscussionSPCBoone, Carroll, Gallatin, Henry, Jefferson, Meade and 2 more66 min
Apr 5, 9:25 AM CDTTornado WatchSPCBoone, Breckinridge, Bullitt, Campbell, Carroll, Gallatin and 12 more7 hr
Apr 5, 12:36 PM CDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Franklin, Gallatin and 13 more84 min
Apr 5, 12:51 PM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Boyle, Butler, Casey and 18 more84 min
Apr 5, 1:02 PM CDTSevere Thunderstorm WatchSPCBracken, Grant, Lewis, Mason, Owen, Pendleton and 1 more8 hr
Apr 5, 1:38 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 42 more6 hr
Apr 5, 3:05 PM CDTMesoscale DiscussionSPCAdair, Anderson, Barren, Breckinridge, Bullitt, Butler and 29 more85 min
Apr 5, 5:12 PM CDTMesoscale DiscussionSPCBath, Bell, Breathitt, Carter, Clay, Elliott and 22 more2 hr
Apr 5, 2:17 PM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Claiborne, Clay, Copiah and 20 more88 min
Apr 5, 2:39 PM CDTSevere Thunderstorm WatchSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 21 more4 hr
Apr 5, 3:48 PM CDTMesoscale DiscussionSPCKemper, Lauderdale, Lowndes, Neshoba, Noxubee87 min
Apr 4, 8:15 PM CDTMesoscale DiscussionSPCAndrew, Bates, Buchanan, Caldwell, Cass, Clay and 11 more2 hr
Apr 4, 11:49 PM CDTMesoscale DiscussionSPCPutnam, Schuyler86 min
Apr 5, 12:05 AM CDTSevere Thunderstorm WatchSPCBarton, Bates, Benton, Cass, Cedar, Chariton and 14 more4 hr

Nearby

Mesoscale Discussions in Arkansas, 2023Mesoscale Discussions in Kentucky, 2023Mesoscale Discussions in Tennessee, 2023Every mesoscale discussion in 2023

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.