Alert archive / Louisiana / Tornado Watches in 2019

Tornado Watch 693

November 26, 20199 counties in Arkansas; 20 parishes in Louisiana; 11 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Nov 26, 2019, 3:42 PM CST for 9 counties in Arkansas; 20 parishes in Louisiana; 11 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Nov 26, 2019, 3:42 PM CST (21:42 UTC)
Expired: Nov 26, 2019, 10:00 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 40 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, Union County, AR, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Bolivar County, MS, Carroll County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Sharkey County, MS, Sunflower County, MS, Washington County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 183 km from the middle of the area, began a volume at 21:42 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 5%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 50%

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Nov 26, 4:11 PM CST	Tornado Warning	JAN	Morehouse, Richland	9 min
Nov 26, 4:38 PM CST	Tornado Warning	SHV	Grant, Natchitoches, Winn	11 min
Nov 26, 4:51 PM CST	Tornado Warning	SHV	Grant, LaSalle, Winn	19 min
Nov 26, 5:53 PM CST	Severe Thunderstorm Warning	JAN	Franklin, Richland	45 min
Nov 26, 6:02 PM CST	Tornado Warning	JAN	Franklin, Madison, Richland	43 min
Nov 26, 6:09 PM CST	Tornado Warning	SHV	Columbia, Union	15 min
Nov 26, 6:42 PM CST	Tornado Warning	JAN	East Carroll, Madison	37 min
Nov 26, 6:49 PM CST	Tornado Warning	JAN	East Carroll	30 min
Nov 26, 7:11 PM CST	Severe Thunderstorm Warning	JAN	Humphreys, Issaquena, Sharkey, Yazoo	64 min
Nov 26, 7:14 PM CST	Tornado Warning	LZK	Arkansas, Jefferson, Lincoln	14 min
Nov 26, 7:33 PM CST	Tornado Warning	JAN	Holmes, Humphreys, Sharkey	19 min
Nov 26, 8:31 PM CST	Severe Thunderstorm Warning	JAN	Madison, Tensas	44 min
Nov 26, 9:09 PM CST	Severe Thunderstorm Warning	JAN	Hinds, Issaquena, Warren, Yazoo	51 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.7 hours before the alert went out and 173 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: 784 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 26, 3:04 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 26 more	116 min
Nov 26, 4:27 PM CST	Mesoscale Discussion	SPC	Arkansas, Baxter, Clay, Cleburne, Conway, Craighead and 25 more	63 min
Nov 26, 4:41 PM CST	Tornado Watch	SPC	Arkansas, Baxter, Clay, Cleburne, Conway, Craighead and 29 more	5 hr

Nearby

Tornado Watches in Louisiana, 2019 Tornado Watches in Mississippi, 2019 Tornado Watches in Arkansas, 2019 Every tornado watch 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.