Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 680

April 28, 200616 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2006, 1:13 PM CDT for 16 counties in Texas. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Apr 28, 2006, 1:13 PM CDT (18:13 UTC)
Expired: Apr 28, 2006, 2:15 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

Counties Bandera County, TX, Crockett County, TX, Edwards County, TX, Gillespie County, TX, Kerr County, TX, Kimble County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 100 km from the middle of the area, began a volume at 18:14 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.

Tornado Watch 257Apr 28, 1:30 PM CDT

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 6.2 hours before the alert went out and 153 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: 1176 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 306 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.4

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.

Issued	Product	Office	Counties	Lasted
Apr 28, 7:03 AM CDT	Mesoscale Discussion	SPC	Dallam, Hansford, Hartley, Hutchinson, Lipscomb, Moore and 3 more	117 min
Apr 28, 10:23 AM CDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Cottle, Donley, Foard, Gray and 8 more	97 min
Apr 28, 10:43 AM CDT	Mesoscale Discussion	SPC	Borden, Crosby, Dawson, Garza, Glasscock, Howard and 8 more	92 min
Apr 28, 11:36 AM CDT	Tornado Watch	SPC	Archer, Baylor, Borden, Brown, Callahan, Childress and 39 more	9 hr
Apr 28, 1:04 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Clay, Coleman, Collin and 33 more	86 min
Apr 28, 1:20 PM CDT	Mesoscale Discussion	SPC	Briscoe, Cottle, Dickens, Floyd, Foard, Hall and 7 more	85 min
Apr 28, 1:28 PM CDT	Tornado Watch	SPC	Bandera, Blanco, Crockett, Edwards, Gillespie, Kendall and 13 more	6 hr
Apr 28, 3:38 PM CDT	Mesoscale Discussion	SPC	Childress, Coke, Cottle, Dickens, Fisher, Foard and 17 more	2 hr
Apr 28, 3:42 PM CDT	Mesoscale Discussion	SPC	Bandera, Crockett, Edwards, Gillespie, Kendall, Kerr and 11 more	2 hr
Apr 28, 6:07 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Cooke, Cottle and 15 more	53 min
Apr 28, 6:18 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Brazos, Brown, Burnet, Callahan and 42 more	87 min
Apr 28, 6:42 PM CDT	Tornado Watch	SPC	Archer, Baylor, Bell, Bosque, Brown, Callahan and 48 more	7 hr

Nearby

Mesoscale Discussions in Texas, 2006 Every mesoscale discussion in 2006

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.