Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 630

April 30, 20075 counties in Oklahoma; 48 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2007, 5:38 PM CDT for 5 counties in Oklahoma; 48 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 2007, 5:38 PM CDT (22:38 UTC)
Expired
Apr 30, 2007, 7:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 53 counties

Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Tillman County, OK, Archer County, TX, Armstrong County, TX, Baylor County, TX, Borden County, TX, Briscoe County, TX, Callahan County, TX, Castro County, TX, Childress County, TX, Clay County, TX, Coleman County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Eastland County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hockley County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Nolan County, TX, Palo Pinto County, TX, Randall County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 112 km from the middle of the area, began a volume at 22:41 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

Midland Regional, TX (KMAF), launched 12:00Z, 10.6 hours before the alert went out and 263 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, Midland Regional, TX at 12:00Z on 2007-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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, Midland Regional, TX at 12:00Z on 2007-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
23 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
972 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 30, 1:22 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Cherokee, Choctaw, Cleveland and 30 more113 min
Apr 29, 7:25 PM CDTMesoscale DiscussionSPCBrewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more65 min
Apr 29, 7:48 PM CDTTornado WatchSPCBandera, Brewster, Crane, Crockett, Dimmit, Edwards and 18 more7 hr
Apr 29, 8:35 PM CDTMesoscale DiscussionSPCBaylor, Callahan, Coke, Coleman, Concho, Ector and 24 more115 min
Apr 29, 10:42 PM CDTMesoscale DiscussionSPCBandera, Brewster, Crane, Crockett, Dimmit, Edwards and 18 more63 min
Apr 30, 2:10 AM CDTMesoscale DiscussionSPCBandera, Crockett, Dimmit, Edwards, Frio, Kerr and 12 more95 min
Apr 30, 2:47 AM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 10 more3 hr
Apr 30, 2:51 AM CDTSevere Thunderstorm WatchSPCBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 9 more5 hr
Apr 30, 4:46 AM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 9 more119 min
Apr 30, 12:37 PM CDTMesoscale DiscussionSPCAtascosa, Bastrop, Bee, Caldwell, DeWitt, Dimmit and 15 more83 min
Apr 30, 1:26 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Colorado, DeWitt, Fayette, Fort Bend and 10 more7 hr
Apr 30, 3:01 PM CDTTornado WatchSPCDimmit, Duval, Frio, Jim Wells, La Salle, Live Oak and 4 more7 hr
Apr 30, 3:23 PM CDTMesoscale DiscussionSPCGrimes, Harris, Houston, Leon, Liberty, Madison and 4 more97 min
Apr 30, 6:18 PM CDTMesoscale DiscussionSPCDimmit, Duval, Frio, Jim Wells, La Salle, Live Oak and 4 more57 min
Apr 30, 6:37 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Colorado, DeWitt, Fayette, Fort Bend and 10 more83 min

Nearby

Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Oklahoma, 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.