Alert archive / Mississippi / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 346, NWS Jackson, MS

October 4, 2019Jefferson Davis County, Marion County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Oct 4, 2019, 8:31 PM CDT for Jefferson Davis County, Marion County, Mississippi. It was in force for 22 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: Oct 4, 2019, 8:31 PM CDT (01:31 UTC)
Expired: Oct 4, 2019, 8:53 PM CDT
In force: 22 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jefferson Davis County, MS, Marion County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 99 km from the middle of the area, began a volume at 01:34 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.5 hours before the alert went out and 128 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: 561 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1601 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Oct 4, 7:14 PM CDT	Special Weather Statement	JAN	Forrest	31 min
Oct 4, 7:47 PM CDT	Special Weather Statement	JAN	Jones, Lamar	43 min
Oct 4, 8:16 PM CDT	Special Weather Statement	JAN	Jefferson Davis	29 min
Oct 4, 8:19 PM CDT	Special Weather Statement	JAN	Jasper	26 min
Oct 4, 8:59 PM CDT	Special Weather Statement	JAN	Covington, Jefferson Davis, Lawrence	31 min
Oct 5, 2:39 PM CDT	Special Weather Statement	JAN	Neshoba	36 min
Oct 5, 3:01 PM CDT	Special Weather Statement	JAN	Leake	29 min
Oct 5, 3:16 PM CDT	Special Weather Statement	JAN	Winston	29 min
Oct 5, 4:24 PM CDT	Special Weather Statement	JAN	Lincoln	36 min
Oct 5, 6:16 PM CDT	Special Weather Statement	JAN	Forrest	44 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.