Alert archive / Arkansas / Mesoscale Discussions in 2024
Mesoscale Discussion 252
The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2024, 11:30 PM CDT for 18 counties in Arkansas; McCurtain County, Oklahoma; 8 counties in Texas. It was in force for 30 min.
The area
The outline as issued.
The facts
- Issued
- Mar 14, 2024, 11:30 PM CDT (04:30 UTC)
- Expired
- Mar 15, 2024, 12:00 AM CDT
- In force
- 30 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 45...46
All 27 counties
Arkansas County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Dallas County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lincoln County, AR, Little River County, AR, Lonoke County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Sevier County, AR, McCurtain County, OK, Bowie County, TX, Delta County, TX, Franklin County, TX, Hopkins County, TX, Lamar County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Shreveport radar (KSHV), 146 km from the middle of the area, began a volume at 04:32 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
Shreveport, LA (KSHV), launched 00:00Z, 4.5 hours before the alert went out and 143 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
- 1592 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1653 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.3
The text
As transmitted.
666
ACUS11 KWNS 150431
SWOMCD
SPC MCD 150430
ARZ000-TXZ000-OKZ000-150500-
Mesoscale Discussion 0252
NWS Storm Prediction Center Norman OK
1130 PM CDT Thu Mar 14 2024
Areas affected...Far Northeast Texas...Far Southeast
Oklahoma...Southern Arkansas
Concerning...Tornado Watch 45...46...
Valid 150430Z - 150500Z
The severe weather threat for Tornado Watch 45, 46 continues.
SUMMARY...The severe threat across southern Arkansas and the
Ark-La-Tex is expected to continue to decrease over the next hour,
and the ongoing watches will be allowed to expire at 05Z.
DISCUSSION...An MCS is currently located from far northeast Texas
extending east-northeastward across western and central Arkansas.
The RAP suggests that instability has markedly decreased along the
southern edge of the MCS over the last hour. This trend will
continue, and the severe threat is expected to gradually diminish.
For this reason, the ongoing watches will be allowed to expire at
05Z. It still remains possible that the severe threat could
re-develop across parts of the region, but this would be later
tonight.
..Broyles.. 03/15/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LZK...SHV...TSA...FWD...
LAT...LON 33949121 33479247 33269385 33039497 32959559 33119590
33359602 33579595 33849573 34249477 34609278 34849150
34559110 33949121SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 14, 7:27 PM CDT | Mesoscale Discussion | SPC | Clark, Conway, Dallas, Faulkner, Garland, Grant and 19 more | 2 hr |
| Mar 14, 8:31 PM CDT | Mesoscale Discussion | SPC | Faulkner, Garland, Perry, Pulaski, Saline | 59 min |
| Mar 14, 9:56 PM CDT | Mesoscale Discussion | SPC | Calhoun, Clark, Cleveland, Columbia, Dallas, Faulkner and 23 more | 2 hr |
| Mar 15, 2:53 AM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Columbia, Lafayette, Union | 2 hr |
| Mar 15, 5:21 AM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more | 114 min |
| Mar 15, 6:30 AM CDT | Severe Thunderstorm Watch | SPC | Crockett, Edwards, Kimble, McCulloch, Mason, Menard and 4 more | 6 hr |
| Mar 15, 9:09 AM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Brown, Burnet, Concho, Edwards and 19 more | 2 hr |
| Mar 15, 12:28 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bexar, Caldwell and 29 more | 3 hr |
| Mar 15, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Austin, Bandera, Bastrop, Bee, Bexar and 57 more | 6 hr |
| Mar 15, 3:54 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bexar, Caldwell, Chambers, Colorado and 24 more | 96 min |
| Mar 15, 6:05 PM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Hardin and 8 more | 115 min |
Nearby
Mesoscale Discussions in Arkansas, 2024Mesoscale Discussions in Texas, 2024Mesoscale Discussions in Oklahoma, 2024Every mesoscale discussion in 2024
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.