Alert archive / Texas / Mesoscale Discussions in 2026

Mesoscale Discussion 607

April 28, 2026Val Verde County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2026, 6:44 PM CDT for Val Verde County, Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 28, 2026, 6:44 PM CDT (23:44 UTC)
Expired: Apr 28, 2026, 8:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 130 km from the middle of the area, began a volume at 23:45 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

Del Rio, TX (KDRT), launched 12:00Z, 11.7 hours before the alert went out and 87 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3436 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

258 
ACUS11 KWNS 282345
SWOMCD
SPC MCD 282344 
TXZ000-290145-

Mesoscale Discussion 0607
NWS Storm Prediction Center Norman OK
0644 PM CDT Tue Apr 28 2026

Areas affected...Southwest Texas

Concerning...Severe potential...Watch unlikely 

Valid 282344Z - 290145Z

Probability of Watch Issuance...20 percent

SUMMARY...An isolated severe thunderstorm will pose a risk of large
hail for a couple of hours over parts of southwest Texas.  A watch
is not anticipated.

DISCUSSION...An isolated intense thunderstorm has formed in Terrell
county TX, just east of Sanderson.  This cell formed along the
surface dryline in a very hot/moist and unstable air mass.  This
storm will likely persist for a couple of hours, tracking into Val
Verde county.  Left-splits from this cell could affect southern
Crockett county as well.  Very steep mid-level lapse rates, high
CAPE, and supercell structures will continue to pose a risk of large
hail over 2 inches and locally damaging wind gusts.  Coverage of
storms is expected to remain sparse, so a watch is not currently
anticipated.

..Hart/Mosier.. 04/28/2026

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...EWX...SJT...MAF...

LAT...LON   30370191 30600122 30170043 29790035 29610064 29530113
            29890192 30140208 30370191 

MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 8:35 PM CDT	Mesoscale Discussion	SPC	Camp, Collin, Dallas, Delta, Franklin, Hopkins and 10 more	115 min
Apr 28, 4:49 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Cottle, Dickens and 10 more	3 hr
Apr 28, 5:31 AM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Cooke, Cottle, Dickens and 16 more	6 hr
Apr 28, 7:46 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Grayson, Wichita, Wilbarger	119 min
Apr 28, 9:33 AM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Collin, Cooke, Delta and 11 more	117 min
Apr 28, 10:45 AM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 6 more	8 hr
Apr 28, 12:07 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Collin, Cooke, Denton and 10 more	113 min
Apr 28, 1:09 PM CDT	Tornado Watch	SPC	Archer, Bosque, Callahan, Clay, Collin, Cooke and 30 more	9 hr
Apr 28, 2:26 PM CDT	Mesoscale Discussion	SPC	Archer, Clay, Collin, Cooke, Denton, Fannin and 10 more	94 min
Apr 28, 3:18 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion, Morris, Red River	117 min
Apr 28, 4:50 PM CDT	Mesoscale Discussion	SPC	Collin, Dallas, Denton, Hood, Palo Pinto, Parker and 2 more	85 min
Apr 28, 5:45 PM CDT	Tornado Watch	SPC	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	7 hr
Apr 28, 5:52 PM CDT	Mesoscale Discussion	SPC	Bowie, Morris, Red River, Titus	113 min

Nearby

Mesoscale Discussions in Texas, 2026 Every 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.