Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 489

April 14, 20175 counties in New Mexico; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2017, 1:49 PM MDT for 5 counties in New Mexico; 14 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Apr 14, 2017, 1:49 PM MDT (19:49 UTC)
Expired: Apr 14, 2017, 3:45 PM MDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Curry County, NM, Eddy County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Cochran County, TX, Deaf Smith County, TX, Gaines County, TX, Hockley County, TX, Lamb County, TX, Loving County, TX, Oldham County, TX, Parmer County, TX, Reeves County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 136 km from the middle of the area, began a volume at 19:49 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.

Severe Thunderstorm Watch 142Apr 14, 2:50 PM MDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 7.8 hours before the alert went out and 188 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: 237 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 14, 4:57 PM MDT	Mesoscale Discussion	SPC	Curry, Eddy, Lea, Quay, Roosevelt	2 hr
Apr 14, 2:50 PM MDT	Severe Thunderstorm Watch	SPC	Bailey, Castro, Dallam, Deaf Smith, Hale, Hartley and 8 more	6 hr

Nearby

Mesoscale Discussions in Texas, 2017 Mesoscale Discussions in New Mexico, 2017 Every mesoscale discussion in 2017

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.