Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 989

June 5, 2019Calcasieu Parish, Cameron Parish, Louisiana; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2019, 2:25 PM CDT for Calcasieu Parish, Cameron Parish, Louisiana; 5 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 5, 2019, 2:25 PM CDT (19:25 UTC)
Expired
Jun 5, 2019, 4:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Calcasieu Parish, LA, Cameron Parish, LA, Brazoria County, TX, Chambers County, TX, Galveston County, TX, Jefferson County, TX, Orange County, TX

The radar

The Houston radar (KHGX), 58 km from the middle of the area, began a volume at 19:28 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.4 hours before the alert went out and 149 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, Lake Charles Mun, LA at 12:00Z on 2019-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1792 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, Lake Charles Mun, LA at 12:00Z on 2019-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 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
1792 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
476 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
152 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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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 7:34 PM CDTMesoscale DiscussionSPCBrewster, Culberson, Jeff Davis, Loving, Pecos, Presidio and 3 more56 min
Jun 5, 2:02 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Castro, Cochran, Dawson, Deaf Smith and 12 more88 min

Nearby

Mesoscale Discussions in Texas, 2019Mesoscale Discussions in Louisiana, 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.