Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 922

May 29, 200711 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2007, 7:53 PM CDT for 11 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 29, 2007, 7:53 PM CDT (00:53 UTC)
Expired: May 29, 2007, 10:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Bell County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Coryell County, TX, Lampasas County, TX, Llano County, TX, Mills County, TX, San Saba County, TX, Taylor County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 119 km from the middle of the area, began a volume at 00:56 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

Fort Worth, TX (KFWD), launched 00:00Z, 0.9 hours before the alert went out and 215 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: 48 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 1040 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
May 29, 9:02 PM CDT	Mesoscale Discussion	SPC	Hansford, Lipscomb, Ochiltree, Sherman	118 min
May 30, 1:52 AM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 1 more	83 min
May 30, 4:11 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Foard, Hardeman, Wichita and 1 more	94 min
May 30, 4:50 AM CDT	Severe Thunderstorm Watch	SPC	Clay, Collin, Cooke, Dallas, Denton, Fannin and 8 more	6 hr
May 30, 7:42 AM CDT	Mesoscale Discussion	SPC	Archer, Clay, Collin, Cooke, Dallas, Denton and 11 more	93 min
May 30, 8:59 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Austin, Bell, Bosque, Bowie and 63 more	5 hr
May 30, 11:07 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazos, Burleson, Camp and 45 more	83 min
May 30, 1:23 PM CDT	Mesoscale Discussion	SPC	Angelina, Chambers, Hardin, Jasper, Jefferson, Liberty and 10 more	97 min
May 30, 6:13 PM CDT	Mesoscale Discussion	SPC	Bandera, Brown, Callahan, Coleman, Comanche, Concho and 18 more	92 min

Nearby

Mesoscale Discussions in Texas, 2007 Every 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.