Alert archive / Louisiana / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 9, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Mar 12, 1986, 12:30 AM CST for Claiborne Parish, Lincoln Parish, Union Parish, Louisiana. It was in force for 65 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 12, 1986, 12:30 AM CST (06:30 UTC)
- Expired
- Mar 12, 1986, 1:35 AM CST
- In force
- 65 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Claiborne Parish, LA, Lincoln Parish, LA, Union Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 12, 12:50 AM CST | Hail 1 | Claiborne, LA | |
| Mar 12, 1:20 AM CST | Thunderstorm Wind 0 | Lincoln, LA | |
| Mar 12, 1:25 AM CST | Thunderstorm Wind 0 | Union, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 00:00Z, 6.5 hours before the alert went out and 186 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.
- Mixed-layer CAPE
- 2309 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 323 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 5.0
- Supercell composite
- 17.6
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, Mar 11, 7:58 PM CST, 4 hours 32 minutes before
NEWSPSSHV SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 755 PM CST TUE MAR 11 1986 TORNADO WATCH NOW IN EFFECT FOR THE NORTHWEST HALF OF THE ARKLATEX... INCLUDES SOUTHWEST ARKANSAS..EXTREME SOUTHEAST OKLAHOMA AND MUCH OF NORTHEAST TEXAS. AT 755 PM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT WAS SHOWING A LINE OF VERY STRONG THUNDERSTORMS FROM EAST CENTRAL OKLAHOMA TO THE RED RIVER TO WEST OF HUGO ACROSS THE RED RIVER TO NEAR GREEN- VILLE TEXAS TO THE WACO AREA. THIS SYSTEM WAS MOVING EAST NEAR 40 MPH. SEVERE STORMS HAVE BEEN REPORTED ALONG PARTS OF THE LINE. THUNDERSTORMS CONTINUE TO DEVELOP AHEAD OF THE LINE OVER EXTREME NORTH EAST TEXAS INTO EXTREME SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS FROM NEAR MENA ARKANSAS TO NEAR DEQUEEN AND FROM NORTH OF BATTIEST IN SOUTHEAST OKLAHOMA TO SOUTHWEST OF IDABEL. THESE STORMS WERE ON THE INCREASE AND SEVERE STORMS MAY DEVELOP WITHIN THE NEXT HOUR. AS THE STRONG SYSTEM OVER NORTHCENTRAL TEXAS APPROCHES THE WESTERN SECTIONS OF NORTHEAST TEXAS...NEW THUNDERSTORMS WILL DEVELOP AHEAD OF THE LINE OVER NORTHEAST TEXAS RAPIDLY WITHIN THE NEXT TWO HOURS. ALTHOUGH THE TORNADO WATCH IS ONLY IN AFFECT FOR THE NORTHWEST HALF OF THE ARKLATEX...THE POTENTIAL FOR SEVERE STORMS ALONG WITH HEAVY RAINFALL WILL SPREAD INTO NORTH LOUISIANA AND THE ADJACENT AREAS LATE TONIGHT THROUGH WEDNESDAY MORNING.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 11:25 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Lincoln | 65 min |
| Mar 11, 11:40 PM CST | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 65 min |
| Mar 12, 12:30 AM CST | Severe Thunderstorm Warning | SHV | Bienville, Jackson | 65 min |
| Mar 12, 12:30 AM CST | Severe Thunderstorm Warning | SHV | Red River | 65 min |
| Mar 12, 1:05 AM CST | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 65 min |
| Mar 12, 1:35 AM CST | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Ouachita | 65 min |
| Mar 12, 2:35 AM CST | Severe Thunderstorm Warning | SHV | Franklin, Tensas | 70 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1986Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.