Alert archive / Louisiana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 128, NWS Shreveport, LA

November 8, 1986Claiborne Parish, Webster Parish, Louisiana; Columbia County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Nov 8, 1986, 2:20 PM CST for Claiborne Parish, Webster Parish, Louisiana; Columbia County, Arkansas. It was in force for 80 min.

The area

The counties it named.

The facts

Issued: Nov 8, 1986, 2:20 PM CST (20:20 UTC)
Expired: Nov 8, 1986, 3:40 PM CST
In force: 80 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Columbia County, AR, Claiborne Parish, LA, Webster 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

Jackson, MS (KJAN), launched 12:00Z, 8.3 hours before the alert went out and 298 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: 605 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 555 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Nov 8, 9:53 AM CST, 4 hours 27 minutes before

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Local storm report, Nov 8, 10:42 AM CST, 3 hours 38 minutes before

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Special weather statement, Nov 8, 12:52 PM CST, 1 hour 28 minutes before

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Special weather statement, Nov 8, 1:40 PM CST, 40 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 7, 6:30 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Winn	60 min
Nov 7, 7:20 PM CST	Tornado Warning	SHV	Jackson, Ouachita	60 min
Nov 8, 2:20 PM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo	80 min
Nov 8, 2:20 PM CST	Severe Thunderstorm Warning	SHV	Union	80 min
Nov 8, 4:10 PM CST	Severe Thunderstorm Warning	SHV	Claiborne, Webster	50 min
Nov 8, 4:10 PM CST	Severe Thunderstorm Warning	SHV	Bossier	50 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1986 Severe Thunderstorm Warnings in Arkansas, 1986 Every severe thunderstorm warning 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.