Alert archive / Texas / Mesoscale Discussions in 2017

Mesoscale Discussion 1429

July 30, 20178 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 30, 2017, 5:55 PM CDT for 8 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jul 30, 2017, 5:55 PM CDT (22:55 UTC)
Expired
Jul 30, 2017, 7:30 PM CDT
In force
95 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Bailey County, TX, Castro County, TX, Deaf Smith County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Oldham County, TX, Parmer County, TX

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.9 hours before the alert went out and 121 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, Amarillo Airport, TX at 12:00Z on 2017-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 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, Amarillo Airport, TX at 12:00Z on 2017-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939Sfc1 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
19 J/kg
Mixed-layer CIN
-277 J/kg
Mixed-layer LCL
1190 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Texas, 2017Every 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.