Alert archive / Texas / Mesoscale Discussions in 2026

Mesoscale Discussion 686

May 9, 202625 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2026, 2:46 PM CDT for 25 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
May 9, 2026, 2:46 PM CDT (19:46 UTC)
Expired
May 9, 2026, 4:45 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch unlikely
Chance of a watch
20%
All 25 counties

Austin County, TX, Bastrop County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX

The radar

The Houston radar (KHGX), 101 km from the middle of the area, began a volume at 19:49 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.8 hours before the alert went out and 328 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, Fort Worth, TX at 12:00Z on 2026-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 94 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, Fort Worth, TX at 12:00Z on 2026-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.19395878Sfc1 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
94 J/kg
Mixed-layer CIN
-358 J/kg
Mixed-layer LCL
1631 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 8, 7:29 PM CDTMesoscale DiscussionSPCArcher, Clay, Collin, Cooke, Delta, Denton and 10 more2 hr
May 8, 9:05 PM CDTSevere Thunderstorm WatchSPCCollin, Cooke, Delta, Denton, Fannin, Grayson and 10 more5 hr
May 8, 9:19 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 7 more116 min
May 8, 11:00 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Jack, Montague and 2 more2 hr
May 9, 1:21 AM CDTMesoscale DiscussionSPCGregg, Harrison, Marion, Panola, Rusk, Shelby114 min
May 9, 1:50 AM CDTMesoscale DiscussionSPCBrooks, Duval, Jim Hogg, Jim Wells, Webb, Zapata115 min
May 9, 9:38 AM CDTMesoscale DiscussionSPCCameron, Hidalgo, Willacy97 min
May 9, 3:32 PM CDTMesoscale DiscussionSPCBaylor, Childress, Collingsworth, Cottle, Foard, Hardeman and 7 more58 min
May 9, 3:59 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 8 more8 hr
May 9, 6:19 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Hemphill and 3 more3 hr

Nearby

Mesoscale Discussions in Texas, 2026Every mesoscale discussion in 2026

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.