Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 599

April 9, 200847 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2008, 12:46 PM CDT for 47 counties in Texas. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Apr 9, 2008, 12:46 PM CDT (17:46 UTC)
Expired: Apr 9, 2008, 1:45 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 47 counties

Bosque County, TX, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Crockett County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fisher County, TX, Glasscock County, TX, Hamilton County, TX, Haskell County, TX, Hill County, TX, Hood County, TX, Howard County, TX, Irion County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Martin County, TX, McCulloch County, TX, Midland County, TX, Mills County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 66 km from the middle of the area, began a volume at 17:49 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

Midland Regional, TX (KMAF), launched 12:00Z, 5.8 hours before the alert went out and 230 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: -289 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 580 m²/s²
0-3 km storm-relative helicity: 675 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.2

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.

Issued	Product	Office	Counties	Lasted
Apr 8, 7:33 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 6 more	117 min
Apr 8, 8:06 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Burnet, Coryell, Ellis, Falls and 16 more	114 min
Apr 8, 8:48 PM CDT	Tornado Watch	SPC	Bell, Burnet, Coryell, Falls, Gillespie, Kimble and 11 more	2 hr
Apr 8, 10:36 PM CDT	Mesoscale Discussion	SPC	Bosque, Bowie, Brown, Camp, Cass, Collin and 34 more	84 min
Apr 8, 11:51 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Bowie, Camp, Cass, Collin, Comanche and 39 more	5 hr
Apr 9, 3:29 AM CDT	Mesoscale Discussion	SPC	Bosque, Bowie, Camp, Cass, Collin, Comanche and 39 more	61 min
Apr 9, 6:00 AM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Briscoe, Castro, Childress, Cochran and 22 more	60 min
Apr 9, 6:27 AM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 36 more	8 hr
Apr 9, 9:06 AM CDT	Mesoscale Discussion	SPC	Andrews, Archer, Armstrong, Bailey, Baylor, Borden and 64 more	54 min
Apr 9, 9:35 AM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Fisher, Foard, Hardeman and 14 more	6 hr
Apr 9, 12:24 PM CDT	Mesoscale Discussion	SPC	Archer, Armstrong, Baylor, Briscoe, Carson, Childress and 37 more	66 min
Apr 9, 1:20 PM CDT	Tornado Watch PDS	SPC	Bosque, Brown, Callahan, Coke, Coleman, Comanche and 40 more	7 hr
Apr 9, 3:33 PM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Dallas, Delta, Denton, Ellis and 16 more	27 min
Apr 9, 3:48 PM CDT	Tornado Watch PDS	SPC	Anderson, Collin, Cooke, Dallas, Delta, Denton and 22 more	7 hr
Apr 9, 4:01 PM CDT	Mesoscale Discussion	SPC	Cass, Harrison, Marion	59 min
Apr 9, 5:12 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Bell, Borden, Bosque, Brown and 51 more	63 min
Apr 9, 6:12 PM CDT	Mesoscale Discussion	SPC	Briscoe, Childress, Cottle, Crosby, Dickens, Floyd and 13 more	63 min
Apr 9, 6:55 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Childress, Clay, Cottle, Dickens and 8 more	8 hr
Apr 9, 6:59 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Comanche, Concho and 34 more	61 min

Nearby

Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.