Alert archive / Arkansas / Mesoscale Discussions in 2015

Mesoscale Discussion 770

May 25, 20154 states

The Storm Prediction Center issued this mesoscale discussion at May 25, 2015, 5:15 PM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 25, 2015, 5:15 PM CDT (22:15 UTC)
Expired
May 25, 2015, 6:45 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 89 counties

Arkansas County, AR, Ashley County, AR, Baxter County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Crawford County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA, Adair County, OK, Haskell County, OK, LeFlore County, OK, McCurtain County, OK, Sequoyah County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Panola County, TX, Red River County, TX, Rusk County, TX, Shelby County, TX, Titus County, TX, Upshur County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 10.3 hours before the alert went out and 211 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 2015-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 261 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 2015-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.193958Sfc1 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
261 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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
May 24, 8:41 PM CDTMesoscale DiscussionSPCMississippi64 min
May 25, 2:35 PM CDTMesoscale DiscussionSPCLittle River, Polk, Sevier55 min
May 25, 2:52 PM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Howard, Little River and 8 more8 hr
May 25, 5:51 PM CDTTornado WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 40 more6 hr
May 24, 7:42 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 18 more93 min
May 25, 2:38 AM CDTMesoscale DiscussionSPCOrleans, Saint Tammany, Washington3 hr
May 25, 6:06 PM CDTMesoscale DiscussionSPCAllen, Beauregard, Calcasieu, Cameron54 min
May 25, 6:24 PM CDTTornado WatchSPCAcadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 3 more9 hr
May 24, 7:57 PM CDTMesoscale DiscussionSPCBeaver, Ellis, Texas93 min
May 24, 8:24 PM CDTTornado WatchSPCBeaver, Ellis, Harper, Texas, Woodward5 hr
May 25, 10:13 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Comanche and 10 more2 hr
May 25, 10:54 AM CDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Cleveland and 21 more7 hr
May 25, 12:22 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 26 more83 min
May 25, 1:54 PM CDTMesoscale DiscussionSPCCarter, Cleveland, Cotton, Garvin, Grady, Jefferson and 8 more2 hr
May 25, 3:17 AM CDTMesoscale DiscussionSPCBandera, Coke, Crane, Crockett, Ector, Edwards and 21 more4 hr
May 25, 6:45 AM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Brown, Callahan, Coke, Coleman and 34 more6 hr
May 25, 6:50 AM CDTMesoscale DiscussionSPCAndrews, Borden, Callahan, Coke, Coleman, Crosby and 26 more55 min
May 25, 7:53 AM CDTMesoscale DiscussionSPCBandera, Bexar, Blanco, Burnet, Comal, Frio and 8 more2 hr
May 25, 9:02 AM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more7 hr
May 25, 11:37 AM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more113 min
May 25, 2:10 PM CDTMesoscale DiscussionSPCAustin, Bastrop, Bexar, Blanco, Brazos, Burleson and 26 more95 min
May 25, 3:19 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 9 more56 min

Nearby

Mesoscale Discussions in Arkansas, 2015Mesoscale Discussions in Louisiana, 2015Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

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.