Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 754

May 8, 200710 counties in Oklahoma; 39 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 8, 2007, 2:46 PM CDT for 10 counties in Oklahoma; 39 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 8, 2007, 2:46 PM CDT (19:46 UTC)
Expired
May 8, 2007, 5:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 49 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Grayson County, TX, Hamilton County, TX, Haskell County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, McCulloch County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 102 km from the middle of the area, began a volume at 19:49 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.8 hours before the alert went out and 83 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, Fort Worth, TX at 12:00Z on 2007-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 770 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, Fort Worth, TX at 12:00Z on 2007-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 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
770 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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, 3:41 PM CDTSevere Thunderstorm WatchSPCComanche, Cotton, Jackson, Jefferson, Kiowa, Stephens and 1 more6 hr
May 8, 5:09 PM CDTMesoscale DiscussionSPCComanche, Cotton, Jackson, Jefferson, Kiowa, Stephens and 1 more96 min
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; radar from the NEXRAD Level II archive.