Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 755

May 8, 20077 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2007, 5:09 PM CDT for 7 counties in Oklahoma; 14 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
May 8, 2007, 5:09 PM CDT (22:09 UTC)
Expired
May 8, 2007, 6:45 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 21 counties

Comanche County, OK, Cotton County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Hardeman County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Montague County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.2 hours before the alert went out and 184 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, Norman, OK at 12:00Z on 2007-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 74 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, Norman, OK at 12:00Z on 2007-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
74 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
506 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

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 7, 7:15 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Johnston, Love and 1 more60 min
May 7, 7:32 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 12 more7 hr
May 7, 9:45 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 12 more60 min
May 8, 2:46 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Jefferson, Johnston and 4 more2 hr
May 8, 3:41 PM CDTSevere Thunderstorm WatchSPCComanche, Cotton, Jackson, Jefferson, Kiowa, Stephens and 1 more6 hr
May 8, 5:29 PM CDTTornado WatchSPCCaddo, Comanche, Cotton, Grady, Jackson, Jefferson and 3 more5 hr
May 7, 8:37 PM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Briscoe, Childress, Coke, Cottle and 38 more7 hr
May 7, 9:23 PM CDTMesoscale DiscussionSPCBandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more67 min
May 7, 11:15 PM CDTMesoscale DiscussionSPCAndrews, Borden, Cochran, Crosby, Dawson, Dickens and 12 more60 min
May 7, 11:43 PM CDTMesoscale DiscussionSPCAndrews, Borden, Cochran, Crosby, Dawson, Dickens and 17 more62 min
May 8, 11:19 AM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Crane, Ector, Fisher and 20 more116 min
May 8, 12:01 PM CDTTornado WatchSPCAndrews, Borden, Brewster, Coke, Crane, Crockett and 27 more7 hr
May 8, 2:44 PM CDTMesoscale DiscussionSPCCoke, Crockett, Fisher, Glasscock, Irion, Mitchell and 6 more91 min
May 8, 6:13 PM CDTMesoscale DiscussionSPCBandera, Edwards, Kerr, Kinney, Medina, Real and 2 more62 min
May 8, 6:58 PM CDTSevere Thunderstorm WatchSPCBandera, Dimmit, Edwards, Gillespie, Kendall, Kerr and 8 more4 hr

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.