Alert archive / Louisiana / Mesoscale Discussions in 2018

Mesoscale Discussion 635

June 3, 201835 parishes in Louisiana; 26 counties in Mississippi; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2018, 3:49 PM CDT for 35 parishes in Louisiana; 26 counties in Mississippi; 16 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2018, 3:49 PM CDT (20:49 UTC)
Expired: Jun 3, 2018, 4:45 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 77 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS, Angelina County, TX, Chambers County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX

The radar

The Ft Polk radar (KPOE), 98 km from the middle of the area, began a volume at 20:53 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, 8.8 hours before the alert went out and 116 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: 1415 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1007 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 22 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.

Issued	Product	Office	Counties	Lasted
Jun 3, 3:54 AM CDT	Mesoscale Discussion	SPC	East Carroll, Franklin, Lincoln, Madison, Morehouse, Ouachita and 4 more	66 min
Jun 3, 1:32 AM CDT	Mesoscale Discussion	SPC	Attala, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 36 more	118 min
Jun 3, 1:55 AM CDT	Severe Thunderstorm Watch	SPC	Attala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 32 more	4 hr
Jun 3, 1:02 PM CDT	Mesoscale Discussion	SPC	El Paso, Hudspeth	118 min
Jun 3, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	Culberson, El Paso, Hudspeth, Jeff Davis, Loving, Presidio and 1 more	9 hr
Jun 3, 4:56 PM CDT	Mesoscale Discussion	SPC	Culberson, El Paso, Hudspeth, Jeff Davis, Loving, Presidio and 1 more	64 min
Jun 3, 6:57 PM CDT	Mesoscale Discussion	SPC	Culberson, El Paso, Hudspeth, Jeff Davis, Loving, Presidio and 2 more	93 min

Nearby

Mesoscale Discussions in Louisiana, 2018 Mesoscale Discussions in Mississippi, 2018 Mesoscale Discussions in Texas, 2018 Every mesoscale discussion in 2018

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.