Alert archive / Mississippi / Mesoscale Discussions in 2019

Mesoscale Discussion 26

January 19, 20199 parishes in Louisiana; 34 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jan 19, 2019, 5:04 AM CST for 9 parishes in Louisiana; 34 counties in Mississippi. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jan 19, 2019, 5:04 AM CST (11:04 UTC)
Expired: Jan 19, 2019, 7:00 AM CST
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 43 counties

Avoyelles Parish, LA, Concordia Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Tensas Parish, LA, Washington Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 86 km from the middle of the area, began a volume at 11:03 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 1Jan 19, 5:20 AM CST

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 11.1 hours before the alert went out and 87 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 176 m²/s²
0-3 km storm-relative helicity: 171 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
Jan 19, 1:24 AM CST	Mesoscale Discussion	SPC	Allen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 11 more	2 hr
Jan 19, 5:23 AM CST	Tornado Watch	SPC	Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 6 more	8 hr
Jan 19, 9:08 AM CST	Mesoscale Discussion	SPC	George, Greene, Perry, Wayne	2 hr
Jan 19, 9:43 AM CST	Tornado Watch	SPC	George, Greene, Perry, Stone, Wayne	7 hr
Jan 19, 11:37 AM CST	Mesoscale Discussion	SPC	George, Greene, Harrison, Jackson, Perry, Stone and 1 more	83 min

Nearby

Mesoscale Discussions in Mississippi, 2019 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.