Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 947

May 25, 201114 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2011, 3:10 AM CDT for 14 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: May 25, 2011, 3:10 AM CDT (08:10 UTC)
Expired: May 25, 2011, 4:45 AM CDT
In force: 95 min
Issued by: the Storm Prediction Center

Counties Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Falls County, TX, Hays County, TX, Lee County, TX, Milam County, TX, Robertson County, TX, Travis County, TX, Washington County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 26 km from the middle of the area, began a volume at 08:11 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, 8.2 hours before the alert went out and 252 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: 2867 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1457 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 357 m²/s²
0-3 km storm-relative helicity: 602 m²/s²
Significant tornado parameter: 6.2
Supercell composite: 44.3

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 24, 7:42 PM CDT	Mesoscale Discussion	SPC	Bowie, Franklin, Red River, Titus	63 min
May 24, 8:05 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Delta, Fannin, Franklin and 15 more	7 hr
May 24, 11:00 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Burnet, Coryell, Falls, Freestone and 6 more	60 min
May 24, 11:22 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bell, Coryell, Falls, Freestone, Henderson and 7 more	5 hr
May 24, 11:24 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Hopkins, Marion and 5 more	96 min
May 25, 1:53 PM CDT	Mesoscale Discussion	SPC	Anderson, Bowie, Camp, Cass, Cherokee, Gregg and 10 more	2 hr
May 25, 3:16 PM CDT	Tornado Watch	SPC	Angelina, Cass, Cherokee, Gregg, Harrison, Marion and 6 more	7 hr
May 25, 5:15 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Brazos, Burleson, Caldwell and 23 more	60 min

Nearby

Mesoscale Discussions in Texas, 2011 Every mesoscale discussion in 2011

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.