Alert archive / Louisiana / Mesoscale Discussions in 2019

Mesoscale Discussion 1002

June 6, 20196 parishes in Louisiana

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2019, 2:54 AM CDT for 6 parishes in Louisiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 6, 2019, 2:54 AM CDT (07:54 UTC)
Expired: Jun 6, 2019, 5:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Acadia Parish, LA, Cameron Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 49 km from the middle of the area, began a volume at 07:56 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 00:00Z, 7.9 hours before the alert went out and 47 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: 100 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 677 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
Jun 5, 11:27 PM CDT	Mesoscale Discussion	SPC	Acadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 1 more	93 min
Jun 6, 9:30 AM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 8 more	60 min
Jun 6, 9:40 AM CDT	Tornado Watch	SPC	Ascension, Jefferson, Lafourche, Livingston, Orleans, Plaquemines and 8 more	6 hr
Jun 6, 12:51 PM CDT	Mesoscale Discussion	SPC	Orleans, Saint Bernard, Saint Tammany, Washington	84 min

Nearby

Mesoscale Discussions in Louisiana, 2019 Every 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.