Alert archive / Texas / Mesoscale Discussions in 2025

Mesoscale Discussion 9

January 5, 20259 counties in Arkansas; 15 parishes in Louisiana; 32 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jan 5, 2025, 9:08 AM CST for 9 counties in Arkansas; 15 parishes in Louisiana; 32 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jan 5, 2025, 9:08 AM CST (15:08 UTC)
Expired
Jan 5, 2025, 11:45 AM CST
In force
3 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...tornado watch likely
Chance of a watch
80%
All 56 counties

Calhoun County, AR, Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Anderson County, TX, Angelina County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Gregg County, TX, Grimes County, TX, Hardin County, TX, Harrison County, TX, Houston County, TX, Jasper County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Marion County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Walker County, TX

The radar

The Shreveport radar (KSHV), 86 km from the middle of the area, began a volume at 15:10 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

Shreveport, LA (KSHV), launched 12:00Z, 3.1 hours before the alert went out and 95 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 2025-01-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 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 2025-01-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 511 square meters per square second.1939587897Sfc1 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
173 J/kg
Mixed-layer CIN
-228 J/kg
Mixed-layer LCL
464 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
511 m²/s²
0-3 km storm-relative helicity
720 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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
Jan 5, 10:29 AM CSTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 12 more8 hr
Jan 5, 1:09 PM CSTMesoscale DiscussionSPCChicot, Desha96 min
Jan 5, 1:36 PM CSTTornado WatchSPCPhillips9 hr
Jan 5, 12:23 PM CSTMesoscale DiscussionSPCCaldwell, Grant, Jackson, LaSalle, Lincoln, Natchitoches and 5 more97 min
Jan 5, 2:02 PM CSTMesoscale DiscussionSPCEast Carroll, Franklin, Madison, Richland, Tensas, West Carroll88 min
Jan 5, 3:19 PM CSTMesoscale DiscussionSPCAllen, Beauregard, Grant, LaSalle, Natchitoches, Rapides and 2 more86 min

Nearby

Mesoscale Discussions in Texas, 2025Mesoscale Discussions in Louisiana, 2025Mesoscale Discussions in Arkansas, 2025Every mesoscale discussion in 2025

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.