Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 365

April 1, 2013Pecos County, Terrell County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2013, 6:44 PM CDT for Pecos County, Terrell County, Texas. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2013, 6:44 PM CDT (23:44 UTC)
Expired: Apr 1, 2013, 8:15 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Pecos County, TX, Terrell County, TX

The radar

The Midland/Odessa radar (KMAF), 146 km from the middle of the area, began a volume at 23:48 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

Midland Regional, TX (KMAF), launched 12:00Z, 11.7 hours before the alert went out and 146 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: 75 J/kg
Mixed-layer CIN: -234 J/kg
Mixed-layer LCL: 1329 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 31, 7:27 PM CDT	Mesoscale Discussion	SPC	Dimmit, Duval, Frio, Jim Wells, Kinney, Kleberg and 8 more	93 min
Mar 31, 9:06 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Hidalgo, Kenedy, Willacy	69 min
Mar 31, 9:47 PM CDT	Mesoscale Discussion	SPC	Brooks, Kleberg	28 min
Apr 1, 3:23 PM CDT	Mesoscale Discussion	SPC	Borden, Briscoe, Childress, Cottle, Crosby, Dickens and 16 more	67 min
Apr 1, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Borden, Briscoe, Childress, Collingsworth, Cottle and 19 more	5 hr
Apr 1, 5:27 PM CDT	Mesoscale Discussion	SPC	Baylor, Childress, Cottle, Dickens, Foard, Hall and 8 more	93 min

Nearby

Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.