Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 242

March 18, 201613 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2016, 7:34 PM CDT for 13 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Mar 18, 2016, 7:34 PM CDT (00:34 UTC)
Expired: Mar 18, 2016, 9:30 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Bee County, TX, Brooks County, TX, Duval County, TX, Goliad County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Starr County, TX, Webb County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 92 km from the middle of the area, began a volume at 00:37 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.

Severe Thunderstorm Watch 49Mar 18, 11:10 PM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 0.6 hours before the alert went out and 108 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: 2025 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Mar 18, 7:06 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Gregg, Harrison, Marion and 4 more	54 min
Mar 18, 8:53 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 23 more	67 min
Mar 18, 11:11 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Duval, Hidalgo, Jim Hogg, Jim Wells, Kenedy and 4 more	5 hr
Mar 19, 12:34 AM CDT	Mesoscale Discussion	SPC	Brooks, Hidalgo, Jim Wells, Kenedy, Kleberg, Nueces and 3 more	86 min
Mar 19, 2:38 AM CDT	Mesoscale Discussion	SPC	Cameron, Hidalgo, Willacy	67 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.