Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 914

May 29, 201712 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2017, 2:02 AM CDT for 12 counties in Texas. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 29, 2017, 2:02 AM CDT (07:02 UTC)
Expired: May 29, 2017, 4:00 AM CDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Aransas County, TX, Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, San Patricio County, TX, Starr County, TX, Willacy County, TX

The radar

The Corpus Christi radar (KCRP), 106 km from the middle of the area, began a volume at 07:06 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

Corpus Christi, TX (KCRP), launched 00:00Z, 7.0 hours before the alert went out and 111 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: 2745 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1028 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
May 28, 7:08 PM CDT	Severe Thunderstorm Watch	SPC	Hardin, Jasper, Newton, Orange, Tyler	6 hr
May 28, 7:19 PM CDT	Mesoscale Discussion	SPC	Duval, Jim Hogg, La Salle, Live Oak, McMullen, Webb and 1 more	56 min
May 28, 7:34 PM CDT	Mesoscale Discussion	SPC	Cherokee, Gregg, Harrison, Houston, Nacogdoches, Panola and 5 more	56 min
May 28, 7:40 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 10 more	8 hr
May 28, 9:16 PM CDT	Mesoscale Discussion	SPC	Hardin, Jasper, Newton, Orange, Sabine, Tyler	59 min
May 28, 9:41 PM CDT	Mesoscale Discussion	SPC	Brooks, Duval, Jim Hogg, Jim Wells, La Salle, Live Oak and 3 more	64 min

Nearby

Mesoscale Discussions in Texas, 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.