Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 78, NWS Jackson, MS

April 4, 2019Morehouse Parish, West Carroll Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Apr 4, 2019, 5:07 PM CDT for Morehouse Parish, West Carroll Parish, Louisiana. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 4, 2019, 5:07 PM CDT (22:07 UTC)
Expired: Apr 4, 2019, 5:26 PM CDT
In force: 19 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Morehouse Parish, LA, West Carroll Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 165 km from the middle of the area, began a volume at 22:06 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

Shreveport, LA (KBAD), launched 12:00Z, 10.1 hours before the alert went out and 202 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: 85 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 442 m²/s²
0-3 km storm-relative helicity: 488 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.1

Open this sounding in Storm Lab

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 4, 5:46 AM CDT	Special Weather Statement	JAN	Issaquena	44 min
Apr 4, 9:35 AM CDT	Special Weather Statement	JAN	Clay, Kemper, Lowndes, Neshoba, Noxubee, Oktibbeha and 1 more	55 min
Apr 4, 12:09 PM CDT	Special Weather Statement	JAN	Bolivar	21 min
Apr 4, 1:53 PM CDT	Special Weather Statement	JAN	Adams	52 min
Apr 4, 3:45 PM CDT	Special Weather Statement	JAN	Adams	45 min
Apr 4, 4:52 AM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland, West Carroll	38 min
Apr 4, 1:11 PM CDT	Special Weather Statement	JAN	Catahoula	49 min
Apr 4, 5:04 PM CDT	Special Weather Statement	JAN	East Carroll, West Carroll	26 min
Apr 4, 5:04 AM CDT	Special Weather Statement	JAN	Ashley	41 min
Apr 4, 4:35 PM CDT	Special Weather Statement	JAN	Chicot	25 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019 Every severe thunderstorm warning 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.