Alert archive / Texas / Mesoscale Discussions in 2025

Mesoscale Discussion 892

May 19, 2025Bryan County, Marshall County, Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 19, 2025, 7:42 PM CDT for Bryan County, Marshall County, Oklahoma; 4 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 19, 2025, 7:42 PM CDT (00:42 UTC)
Expired: May 19, 2025, 9:15 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 295

Counties Bryan County, OK, Marshall County, OK, Cooke County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 118 km from the middle of the area, began a volume at 00:45 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

Fort Worth, TX (KFWD), launched 00:00Z, 0.7 hours before the alert went out and 91 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: 3133 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 879 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 272 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 5.9
Supercell composite: 19.5

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.

Issued	Product	Office	Counties	Lasted
May 19, 11:40 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Johnston, Latimer and 6 more	2 hr
May 20, 12:00 AM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more	3 hr
May 20, 1:21 AM CDT	Mesoscale Discussion	SPC	Atoka, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 2 more	54 min
May 20, 1:57 AM CDT	Severe Thunderstorm Watch	SPC	McCurtain	5 hr
May 20, 4:21 AM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Marion, Morris, Titus and 2 more	54 min
May 20, 9:40 AM CDT	Mesoscale Discussion	SPC	Aransas, Bee, Bexar, Brazoria, Calhoun, Colorado and 15 more	2 hr
May 20, 1:14 PM CDT	Mesoscale Discussion	SPC	Angelina, Jasper, Nacogdoches, Newton, Panola, Polk and 5 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2025 Mesoscale Discussions in Oklahoma, 2025 Every 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.