Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 494

April 29, 201616 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2016, 7:38 AM CDT for 16 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Apr 29, 2016, 7:38 AM CDT (12:38 UTC)
Expired: Apr 29, 2016, 9:15 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Briscoe County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Haskell County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Motley County, TX, Stonewall County, TX

The radar

The Lubbock radar (KLBB), 83 km from the middle of the area, began a volume at 12:41 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, 0.6 hours before the alert went out and 233 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: 750 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1396 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 7:52 PM CDT	Mesoscale Discussion	SPC	Bell, Brazos, Burleson, Burnet, Coryell, Falls and 7 more	83 min
Apr 28, 10:31 PM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 30 more	89 min
Apr 28, 10:54 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 36 more	7 hr
Apr 29, 1:58 AM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Collin, Cooke, Delta and 17 more	2 hr
Apr 29, 2:59 AM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Cochran and 18 more	91 min
Apr 29, 4:54 AM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Briscoe, Carson, Castro, Childress and 28 more	66 min
Apr 29, 9:46 AM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Harrison, Marion, Morris	89 min
Apr 29, 12:51 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Delta, Franklin, Gregg and 17 more	114 min
Apr 29, 12:52 PM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Bosque, Brown, Burnet, Comanche and 22 more	113 min
Apr 29, 1:08 PM CDT	Tornado Watch	SPC	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 35 more	9 hr
Apr 29, 1:40 PM CDT	Mesoscale Discussion	SPC	Cooke, Fannin, Grayson, Wichita, Wilbarger	65 min
Apr 29, 1:43 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 10 more	8 hr
Apr 29, 1:57 PM CDT	Tornado Watch	SPC	Clay, Wichita, Wilbarger	8 hr
Apr 29, 3:34 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Collin, Cooke, Coryell, Dallas and 31 more	86 min
Apr 29, 5:42 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Cherokee, Franklin, Gregg and 10 more	93 min
Apr 29, 6:16 PM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Delta, Denton, Fannin, Grayson and 3 more	89 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.