Alert archive / Arkansas / Mesoscale Discussions in 2020

Mesoscale Discussion 724

May 25, 202015 counties in Arkansas; 7 counties in Oklahoma; Bowie County, Cass County, Red River County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2020, 1:50 PM CDT for 15 counties in Arkansas; 7 counties in Oklahoma; Bowie County, Cass County, Red River County, Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 25, 2020, 1:50 PM CDT (18:50 UTC)
Expired
May 25, 2020, 3:15 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
40%
All 25 counties

Crawford County, AR, Franklin County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Choctaw County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Sequoyah County, OK, Bowie County, TX, Cass County, TX, Red River County, TX

The radar

The Western Arkansas radar (KSRX), 116 km from the middle of the area, began a volume at 18:54 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 12:00Z, 6.8 hours before the alert went out and 214 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, Shreveport, LA at 12:00Z on 2020-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 538 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, Shreveport, LA at 12:00Z on 2020-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 218 square meters per square second.1939Sfc1 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
538 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
730 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
218 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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
May 25, 3:39 PM CDTMesoscale DiscussionSPCPolk, Sebastian96 min
May 25, 5:59 PM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Logan, Scott, Sebastian and 1 more3 hr
May 25, 6:14 PM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Johnson, Logan and 7 more5 hr
May 24, 8:43 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Custer, Dewey and 10 more2 hr
May 24, 7:05 PM CDTSevere Thunderstorm WatchSPCBlanco, Brown, Burnet, Callahan, Coleman, Comal and 19 more5 hr
May 24, 8:21 PM CDTMesoscale DiscussionSPCAransas, Atascosa, Bastrop, Bee, Bexar, Brooks and 26 more114 min
May 24, 9:05 PM CDTSevere Thunderstorm WatchSPCAransas, Bastrop, Bee, Caldwell, Calhoun, DeWitt and 16 more7 hr
May 24, 10:41 PM CDTSevere Thunderstorm WatchSPCBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more4 hr
May 24, 11:23 PM CDTMesoscale DiscussionSPCAransas, Bee, Brooks, Calhoun, Cameron, Goliad and 11 more2 hr
May 25, 3:19 PM CDTMesoscale DiscussionSPCMaverick116 min
May 25, 5:04 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Duval, Hidalgo, Jim Hogg, Kenedy and 4 more116 min

Nearby

Mesoscale Discussions in Arkansas, 2020Mesoscale Discussions in Oklahoma, 2020Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020

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.