Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 871

May 13, 200511 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2005, 9:22 PM CDT for 11 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 13, 2005, 9:22 PM CDT (02:22 UTC)
Expired: May 13, 2005, 10:45 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Haskell County, TX, Jones County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 12 km from the middle of the area, began a volume at 02:22 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, 2.4 hours before the alert went out and 191 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: 498 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 1571 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
May 13, 8:05 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 26 more	55 min
May 14, 12:25 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Concho, Eastland and 14 more	35 min
May 14, 12:13 PM CDT	Mesoscale Discussion	SPC	Panola, Shelby	3 hr
May 14, 2:07 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Crockett, Culberson, Ector, El Paso and 17 more	83 min
May 14, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	Crane, Crockett, Culberson, Ector, Hudspeth, Jeff Davis and 9 more	7 hr

Nearby

Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.