Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 757

May 25, 201527 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2015, 3:17 AM CDT for 27 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
May 25, 2015, 3:17 AM CDT (08:17 UTC)
Expired
May 25, 2015, 7:15 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 27 counties

Bandera County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Ector County, TX, Edwards County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Maverick County, TX, Medina County, TX, Midland County, TX, Mitchell County, TX, Pecos County, TX, Reagan County, TX, Real County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Tom Green County, TX, Upton County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The San Angelo radar (KSJT), 69 km from the middle of the area, began a volume at 08:17 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

Del Rio, TX (KDLF), launched 00:00Z, 8.3 hours before the alert went out and 163 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, Del Rio, TX at 00:00Z on 2015-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 418 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, Del Rio, TX at 00:00Z on 2015-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
418 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
2087 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.5

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, 7:57 PM CDTMesoscale DiscussionSPCHemphill, Lipscomb, Ochiltree, Roberts93 min
May 24, 8:24 PM CDTTornado WatchSPCHansford, Lipscomb, Ochiltree5 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, 10:13 AM CDTMesoscale DiscussionSPCAnderson, Archer, Baylor, Bell, Bosque, Brown and 69 more2 hr
May 25, 10:54 AM CDTTornado WatchSPCArcher, Baylor, Bell, Bosque, Brown, Callahan and 55 more7 hr
May 25, 11:37 AM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more113 min
May 25, 1:54 PM CDTMesoscale DiscussionSPCBell, Bosque, Clay, Collin, Cooke, Coryell and 26 more2 hr
May 25, 2:10 PM CDTMesoscale DiscussionSPCAustin, Bastrop, Bexar, Blanco, Brazos, Burleson and 26 more95 min
May 25, 2:35 PM CDTMesoscale DiscussionSPCAnderson, Austin, Bowie, Brazos, Burleson, Camp and 34 more55 min
May 25, 2:52 PM CDTTornado WatchSPCAnderson, Angelina, Bastrop, Blanco, Bowie, Brazos and 53 more8 hr
May 25, 3:19 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 9 more56 min
May 25, 5:15 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Gregg, Harrison, Marion and 7 more90 min
May 25, 5:51 PM CDTTornado WatchSPCSabine6 hr
May 25, 6:06 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 14 more54 min
May 25, 6:24 PM CDTTornado WatchSPCAustin, Bee, Brazoria, Calhoun, Chambers, Colorado and 18 more9 hr

Nearby

Mesoscale 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; radar from the NEXRAD Level II archive.