Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 1208

June 20, 200712 counties in Oklahoma; 53 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2007, 12:49 AM CDT for 12 counties in Oklahoma; 53 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Jun 20, 2007, 12:49 AM CDT (05:49 UTC)
Expired
Jun 20, 2007, 1:45 AM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 65 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Archer County, TX, Baylor County, TX, Borden County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Fannin County, TX, Fisher County, TX, Franklin County, TX, Glasscock County, TX, Grayson County, TX, Haskell County, TX, Hood County, TX, Hopkins County, TX, Howard County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kaufman County, TX, Knox County, TX, Lamar County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 64 km from the middle of the area, began a volume at 05:50 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 00:00Z, 5.8 hours before the alert went out and 168 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 00:00Z on 2007-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3576 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 00:00Z on 2007-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 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
3576 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
27 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
Jun 19, 7:39 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 39 more66 min
Jun 19, 9:28 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 32 more62 min
Jun 19, 11:20 PM CDTSevere Thunderstorm WatchSPCAtoka, Beckham, Bryan, Caddo, Carter, Cleveland and 22 more6 hr
Jun 20, 4:09 AM CDTMesoscale DiscussionSPCBryan, Choctaw, Love, Marshall96 min
Jun 20, 4:38 AM CDTSevere Thunderstorm WatchSPCChoctaw6 hr
Jun 20, 10:21 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Haskell, Latimer, LeFlore, McCurtain and 4 more54 min
Jun 20, 1:10 AM CDTSevere Thunderstorm WatchSPCBorden, Bosque, Brown, Callahan, Coke, Coleman and 47 more8 hr
Jun 20, 3:44 AM CDTMesoscale DiscussionSPCAnderson, Bandera, Bastrop, Bell, Bexar, Blanco and 65 more91 min
Jun 20, 6:24 AM CDTMesoscale DiscussionSPCEdwards, Kinney, Real, Sutton, Terrell, Val Verde66 min
Jun 20, 6:42 AM CDTMesoscale DiscussionSPCBastrop, Bell, Caldwell, Falls, Hays, Lee and 4 more93 min
Jun 20, 2:39 PM CDTMesoscale DiscussionSPCEl Paso, Hudspeth96 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.