Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 651

May 2, 200726 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2007, 5:08 PM CDT for 26 counties in Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 2, 2007, 5:08 PM CDT (22:08 UTC)
Expired
May 2, 2007, 6:15 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 26 counties

Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burleson County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Fayette County, TX, Frio County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Lavaca County, TX, Lee County, TX, Maverick County, TX, Medina County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 71 km from the middle of the area, began a volume at 22:12 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 (KDRT), launched 12:00Z, 10.1 hours before the alert went out and 212 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 12:00Z on 2007-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1853 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 12:00Z on 2007-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 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
1853 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

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 1, 7:08 PM CDTMesoscale DiscussionSPCAustin, Bandera, Bastrop, Bexar, Blanco, Brazos and 29 more97 min
May 2, 7:19 AM CDTMesoscale DiscussionSPCAndrews, Dawson, Ector, Gaines, Loving, Martin and 4 more2 hr
May 2, 7:40 AM CDTMesoscale DiscussionSPCCrane, Crockett, Ector, Loving, Midland, Pecos and 7 more2 hr
May 2, 8:02 AM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Coke, Crane, Crockett, Dawson and 20 more6 hr
May 2, 10:11 AM CDTMesoscale DiscussionSPCBrewster, Crane, Crockett, Glasscock, Howard, Irion and 7 more94 min
May 2, 12:07 PM CDTMesoscale DiscussionSPCCulberson, Hudspeth, Jeff Davis, Loving, Reeves113 min
May 2, 12:39 PM CDTMesoscale DiscussionSPCBandera, Brown, Callahan, Coke, Coleman, Comanche and 29 more66 min
May 2, 12:50 PM CDTTornado WatchSPCBandera, Brown, Burnet, Callahan, Coke, Coleman and 31 more6 hr
May 2, 1:53 PM CDTSevere Thunderstorm WatchSPCAndrews, Crane, Culberson, Dawson, Ector, Gaines and 14 more7 hr
May 2, 2:38 PM CDTMesoscale DiscussionSPCBosque, Coryell, Dallas, Denton, Ellis, Erath and 16 more2 hr
May 2, 3:08 PM CDTMesoscale DiscussionSPCDimmit, Frio, Kinney, Maverick, Uvalde, Val Verde and 1 more97 min
May 2, 3:43 PM CDTTornado WatchSPCAnderson, Bell, Bosque, Collin, Comanche, Cooke and 33 more6 hr
May 2, 5:53 PM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more7 hr
May 2, 6:05 PM CDTMesoscale DiscussionSPCAndrews, Brewster, Cochran, Coke, Crane, Culberson and 22 more85 min
May 2, 6:52 PM CDTTornado WatchSPCBrewster, Crockett, Jeff Davis, Pecos, Presidio, Terrell3 hr
May 2, 6:54 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brazos, Burnet, Camp and 54 more81 min

Nearby

Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007

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.