Alert archive / Arkansas / Mesoscale Discussions in 2016
Mesoscale Discussion 283
The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2016, 11:57 AM CDT for 4 states. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2016, 11:57 AM CDT (16:57 UTC)
- Expired
- Mar 30, 2016, 1:00 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 81 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Conway County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Miller County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, Howell County, MO, McDonald 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, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Hopkins County, TX, Lamar County, TX, Morris County, TX, Red River County, TX, Titus County, TX, Upshur County, TX
The radar
The Western Arkansas radar (KSRX), 78 km from the middle of the area, began a volume at 16:58 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
Norman, OK (KOUN), launched 12:00Z, 5.0 hours before the alert went out and 254 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.
- Mixed-layer CAPE
- 571 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 612 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 351 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
839
ACUS11 KWNS 301658
SWOMCD
SPC MCD 301657
MOZ000-ARZ000-TXZ000-OKZ000-301800-
MESOSCALE DISCUSSION 0283
NWS STORM PREDICTION CENTER NORMAN OK
1157 AM CDT WED MAR 30 2016
AREAS AFFECTED...CNTRL AND ERN OK...NERN TX...WRN AND CNTRL ARKANSAS
AND WRN MO
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 301657Z - 301800Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...STRONGER CELLS EMBEDDED WITHIN AN AREA OF WIDESPREAD
ELEVATED CONVECTION MAY PRODUCE A FEW INSTANCES OF HAIL AND POSSIBLY
ISOLATED STRONG WIND GUSTS THROUGH EARLY AFTERNOON. A WW WILL
PROBABLY NOT BE REQUIRED FOR THIS INITIAL ACTIVITY.
DISCUSSION...WIDESPREAD ELEVATED CONVECTION HAS DEVELOPED FROM NERN
TX THROUGH CNTRL/ERN OK INTO ARKANSAS. THIS ACTIVITY IS DEVELOPING
IN RESPONSE TO AN EWD PROPAGATING GRAVITY WAVE AND WITHIN A MORE
GENERAL AREA OF WARM ADVECTION DOWNSTREAM FROM A SUBTLE BUT
PROGRESSIVE LEAD SHORTWAVE TROUGH CURRENTLY MOVING THROUGH OK/NCNTRL
TX. WIDESPREAD CLOUDS HAVE LIMITED BOUNDARY LAYER DESTABILIZATION SO
FAR...BUT 12Z RAOBS SHOW STEEP MID-LEVEL LAPSE RATES AND COLD
TEMPERATURES ALOFT SUPPORTIVE OF A FEW INSTANCES OF HAIL.
..DIAL/THOMPSON.. 03/30/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SGF...SHV...TSA...FWD...OUN...
LAT...LON 32649516 33619617 34849724 36409627 36829423 37479124
34309289 33109398 32649516SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 2:07 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 83 min |
| Mar 30, 2:31 PM CDT | Tornado Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 23 more | 7 hr |
| Mar 30, 5:06 PM CDT | Mesoscale Discussion | SPC | Calhoun, Clark, Columbia, Dallas, Hempstead, Lafayette and 5 more | 84 min |
| Mar 30, 6:15 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 17 more | 90 min |
| Mar 30, 6:53 PM CDT | Tornado Watch | SPC | Ashley, Chicot, Craighead, Crittenden, Cross, Lee and 4 more | 8 hr |
| Mar 30, 1:42 PM CDT | Mesoscale Discussion | SPC | Callaway, Crawford, Franklin, Gasconade, Jefferson, Lincoln and 13 more | 2 hr |
| Mar 30, 2:56 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Bates, Buchanan, Caldwell, Cass and 11 more | 2 hr |
| Mar 30, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | Andrew, Buchanan, Holt, Platte | 3 hr |
| Mar 30, 6:22 PM CDT | Mesoscale Discussion | SPC | Barton, Cedar, Dade, Jasper, McDonald, Newton and 2 more | 53 min |
| Mar 30, 1:00 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 20 more | 2 hr |
| Mar 30, 1:50 PM CDT | Severe Thunderstorm Watch | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 28 more | 8 hr |
| Mar 30, 3:54 PM CDT | Mesoscale Discussion | SPC | Bryan, Canadian, Carter, Cleveland, Coal, Cotton and 26 more | 96 min |
| Mar 30, 1:57 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Coke, Coleman, Collin and 28 more | 63 min |
| Mar 30, 2:09 PM CDT | Severe Thunderstorm Watch | SPC | Bosque, Brown, Callahan, Coke, Coleman, Collin and 28 more | 5 hr |
| Mar 30, 5:36 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bell, Bosque, Collin, Coryell, Dallas and 30 more | 4 hr |
Nearby
Mesoscale Discussions in Arkansas, 2016Mesoscale Discussions in Oklahoma, 2016Mesoscale Discussions in Texas, 2016Every mesoscale discussion in 2016
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.