Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 1012

June 6, 201911 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2019, 8:10 PM CDT for 11 counties in Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Jun 6, 2019, 8:10 PM CDT (01:10 UTC)
Expired
Jun 6, 2019, 9:15 PM CDT
In force
65 min
Issued by
the Storm Prediction Center

Counties Aransas County, TX, Bee County, TX, Brazoria County, TX, Calhoun County, TX, Galveston County, TX, Kenedy County, TX, Kleberg County, TX, Matagorda County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX

The radar

The Corpus Christi radar (KCRP), 82 km from the middle of the area, began a volume at 01:12 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, 1.2 hours before the alert went out and 67 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2019-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2624 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2019-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2624 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1229 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.7
Supercell composite
8.2

Open this sounding in Storm Lab

The text

As transmitted.

096 
ACUS11 KWNS 070111
SWOMCD
SPC MCD 070110 
TXZ000-070215-

Mesoscale Discussion 1012
NWS Storm Prediction Center Norman OK
0810 PM CDT Thu Jun 06 2019

Areas affected...-Texas Gulf Coast

Concerning...Severe Thunderstorm Watch 336...

Valid 070110Z - 070215Z

The severe weather threat for Severe Thunderstorm Watch 336
continues.

SUMMARY...The severe threat will move offshore after 02Z, but
damaging wind and localized hail threat will continue until then,
especially with intense supercell southwest of Corpus Christi.

DISCUSSION...At 01Z, thunderstorms have consolidated into a
primarily linear mode (with embedded supercell structures) across
the middle/upper TX coast, while an intense supercell is ongoing
southwest of Corpus Christi. Some damaging wind threat will persist
with the line, though the tendency has been for outflow to become
increasingly dominant and for updrafts to gradually weaken with time
as storms encounter increasing MLCINH near the coast.  

Further southwest, a 77 MPH wind gust was noted in the last hour
with the supercell that passed near Kingsville, TX. The threat for
widespread damaging wind and some hail should continue with this
cell until it moves offshore by 02Z.

..Dean.. 06/07/2019

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...HGX...CRP...BRO...

LAT...LON   26569753 26939786 27479790 28499779 29039632 29449522
            29219482 28909527 28269627 27509689 26579692 26569753

Nearby

Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019

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.