Alert archive / Louisiana / Tornado Warnings in 1986

Tornado Warning 21, NWS Shreveport, LA

April 19, 1986Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 19, 1986, 4:55 PM CST for Bossier Parish, Caddo Parish, Louisiana. It was in force for 65 min.

The area

The counties it named.

The facts

Issued: Apr 19, 1986, 4:55 PM CST (22:55 UTC)
Expired: Apr 19, 1986, 6:00 PM CST
In force: 65 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Bossier Parish, LA, Caddo Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 12:00Z, 10.9 hours before the alert went out and 86 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: 115 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 684 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSHV 192258
TORSHV
TXC203-LAC017-015-200000-

BULLETIN...EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
455 PM CST SAT APR 19 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE
UNTIL 6:00 PM CST   FOR PEOPLE IN THE FOLLOWING COUNTIES/PARISHES IN

NORTHEAST TEXAS...HARRISON.

NORTHWEST LOUISIANA...CADDO AND BOSSIER.

AT 4:50 PM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED
A POSSIBLE TORNADO 8 MILES NORTH OF MARSHALL TEXAS MOVING EAST NEAR
35 MPH.

PERSONS IN THE PATH OF THIS TORNADO SHOULD SEEK SHELTER IN A PERMANENT
STRUCTURE ON THE LOWEST FLOOR IN AN INTERIOR SMALL ROOM.  GET UNDER A
PIECE OF HEAVY FURNITURE OR COVER YOURSELF WITH SOMETHING TO PROTECT
AGAINST FLYING OR FALLING DEBRIS.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 19, 1:45 PM CST	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	60 min
Apr 19, 2:10 PM CST	Tornado Warning	SHV	Bossier	60 min
Apr 19, 2:35 PM CST	Severe Thunderstorm Warning	SHV	Winn	70 min
Apr 19, 3:10 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Red River	60 min
Apr 19, 3:10 PM CST	Severe Thunderstorm Warning	SHV	Webster	60 min
Apr 19, 4:00 PM CST	Severe Thunderstorm Warning	SHV	Natchitoches, Winn	60 min
Apr 19, 4:10 PM CST	Tornado Warning	SHV	Winn	50 min
Apr 19, 5:10 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Lincoln, Ouachita	80 min

Nearby

Tornado Warnings in Louisiana, 1986 Every tornado warning in 1986 Tornadoes in 1986

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.