Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 215

March 28, 201454 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2014, 12:35 PM CDT for 54 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Mar 28, 2014, 12:35 PM CDT (17:35 UTC)
Expired: Mar 28, 2014, 2:30 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 54 counties

Anderson County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Camp County, TX, Cherokee County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Franklin County, TX, Freestone County, TX, Gillespie County, TX, Gregg County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Mason County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, San Saba County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Travis County, TX, Upshur County, TX, Van Zandt County, TX, Williamson County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 88 km from the middle of the area, began a volume at 17:37 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.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 5.6 hours before the alert went out and 115 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: 1120 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1065 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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
Mar 28, 12:45 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion, Morris	2 hr
Mar 28, 12:47 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bastrop, Bell, Blanco, Bosque, Burnet and 50 more	6 hr
Mar 28, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	Angelina, Bowie, Cass, Cherokee, Gregg, Harrison and 7 more	7 hr
Mar 28, 3:11 PM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Bell, Bosque, Bowie, Brazos and 56 more	94 min
Mar 28, 3:57 PM CDT	Severe Thunderstorm Watch	SPC	Brazos, Burleson, Grimes, Hardin, Houston, Jasper and 10 more	6 hr
Mar 28, 5:19 PM CDT	Severe Thunderstorm Watch	SPC	Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 5 more	5 hr
Mar 28, 6:38 PM CDT	Mesoscale Discussion	SPC	Newton	3 hr
Mar 28, 6:53 PM CDT	Mesoscale Discussion	SPC	Angelina, Austin, Brazoria, Chambers, Fort Bend, Galveston and 16 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2014 Every mesoscale discussion in 2014

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.