Alert archive / Louisiana / Tornado Warnings in 1986
Tornado Warning 24, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at May 18, 1986, 10:55 AM CDT for Franklin Parish, Madison Parish, Tensas Parish, Louisiana. It was in force for 70 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
- May 18, 1986, 10:55 AM CDT (15:55 UTC)
- Expired
- May 18, 1986, 12:05 PM CDT
- In force
- 70 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Franklin Parish, LA, Madison Parish, LA, Tensas 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 |
|---|---|---|---|
| May 18, 11:05 AM CDT | Tornado F0 | Madison, LA | |
| May 18, 11:15 AM CDT | Hail 1 | Tensas, LA | |
| May 18, 11:25 AM CDT | Hail 1.75 | Madison, 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
Jackson, MS (KJAN), launched 12:00Z, 3.9 hours before the alert went out and 127 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
- 286 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.1
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 tornado 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, May 18, 7:24 AM CDT, 3 hours 31 minutes before
NEWSPSSHV SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 720 AM CDT SUN MAY 18 1986 ...ISOLATED HEAVY THUNDERSTORMS RETURN TO THE ARKLATEX AND SOUTHEAST OKLAHOMA... SCATTERED SHOWERS AND ISOLATED HEAVY THUNDERSTORMS CONTINUED TO DEVELOP OVER PARTS OF SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS... NORTHEAST TEXAS AND NORTH LOUISIANA. AT 7:15 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A 100 MILE WIDE AREA OF SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM NEAR MURFREESBORO ARKANSAS ACROSS THE IDABEL OKLAHOMA AND NEW BOSTON TEXAS AREAS ON TO NEAR GREENVILLE TEXAS. HEAVY THUNDERSTORMS WERE LOCATED WITHIN THIS AREA 10 MILES EAST OF IDABEL OKLAHOMA AND 12 MILES NORTHWEST OF LINDEN TEXAS. THESE STORMS WERE LIKELY PRODUCING STRONG GUSTY WINDS OF 20 TO 40 MPH AND BRIEF HEAVY RAINS WITH THEIR PASSAGE. ALSO...ISOLATED SHOWERS WERE DEVELOPING NEAR CARTHAGE TEXAS AND BETHANY LOUISIANA. WHILE AN ISOLATED THUNDERSHOWER WAS LOCATED 8 MILES SOUTHEAST OF MANY LOUISIANA AND ANOTHER ABOUT 10 MILES EAST OF WINNFIELD LOUISIANA. MOVEMENT OF ALL PRECIPITATION WAS NORTHEAST NEAR 25 MPH. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD ACROSS THE AREA TODAY WITH SOME STORMS BECOMING LOCALLY HEAVY.
Special weather statement, May 18, 8:18 AM CDT, 2 hours 37 minutes before
NEWSPSSHV SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 815 AM CDT SUN MAY 18 1986 ...ISOLATED HEAVY THUNDERSTORMS CONTINUED TO SPREAD NORTHEAST OVER SOUTHWEST ARKANSAS AND NORTH CENTRAL LOUISIANA... SCATTERED SHOWERS AND ISOLATED HEAVY THUNDERSTORMS CONTINUED TO DEVELOP OVER PARTS OF SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS... NORTHEAST TEXAS AND NORTH LOUISIANA. AT 8:10 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A 100 MILE WIDE AREA OF SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM NEAR MOUNT IDA ARKANSAS ACROSS THE NEW BOSTON TEXAS AREA ON TO NEAR QUITMAN TEXAS. HEAVY THUNDERSTORMS WERE LOCATED JUST NORTH OF TEXARKANA AND 8 MILES SOUTHEAST OF DE QUEEN ARKANSAS. THESE STORMS WERE LIKELY PRODUCING STRONG GUSTY WINDS OF 20 TO 40 MPH AND BRIEF HEAVY RAINS WITH THEIR PASSAGE. ALSO SOME PEA SIZE HAIL MAY BE NOTED WITH THE STORMS SOUTHEAST OF DE QUEEN. ALSO...SCATTERED SHOWERS AND THUNDERSTORMS WERE NOTED IN A 50 MILE WIDE AREA FROM NEAR WINNSBORO TO NEAR BOSSIER CITY LOUISIANA. WITHIN THIS AREA HEAVY THUNDERSTORMS WERE LOCATED 10 MILES WEST OF JONESBORO 5 MILES NORTH OF NATCHITOCHES AND 10 MILES WEST OF COLUMBIA. BRIEF HEAVY RAINS WERE ASSOCIATED WITH THESE STORMS AS WELL AS GUSTY WINDS. MOVEMENT OF ALL PRECIPITATION WAS NORTHEAST NEAR 25 MPH. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD ACROSS THE AREA TODAY WITH SOME STORMS BECOMING LOCALLY HEAVY.
Special weather statement, May 18, 9:31 AM CDT, 1 hour 24 minutes before
NEWSPSSHV SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 925 AM CDT SUN MAY 18 1986 ...VERY INTENSE THUNDERSTORMS CONTINUED TO SPREAD NORTHEAST OVER NORTH LOUISIANA... SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED TO SPREAD NORTHEAST ACROSS PARTS OF SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS...NORTHEAST TEXAS AND NORTH LOUISIANA. AT 9:20 AM THE WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A 100 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM NEAR HOT SPRINGS ARKANSAS ACROSS TEXARKANA TO NEAR DANGERFIELD TEXAS. A HEAVY THUNDERSTORM WAS LOCATED SOUTHEAST OF TEXARKANA AND ONE WAS SOUTHEAST OF MURFREESBORO ARKANSAS. THESE STORMS WERE LIKELY PRODUCING STRONG GUSTY WINDS OF 20 TO 40 MPH AND BRIEF HEAVY RAINS WITH THEIR PASSAGE. MOVEMENT WAS NORTHEAST NEAR 30 MPH. ALSO...SCATTERED SHOWERS AND THUNDERSTORMS WERE NOTED IN A 75 MILE WIDE AREA FROM NEAR HAMBURG ARKANSAS TO MANY LOUISIANA. WITHIN THIS AREA INTENSE THUNDERSTORMS WERE LOCATED 12 MILES EAST OF RAYVILLE...10 MILES NORTH OF WINNSBORO...12 MILES WEST OF COLUMBIA...15 MILES NORTHWEST OF WINNFIELD AND 5 MILES NORTH OF NATCHITOCHES LOUISIANA. BRIEF VERY HEAVY RAINS...PEA SIZE HAIL AND STRONG WINDS OF 35 TO 50 MPH ARE LIKELY WITH THE PASSAGE OF THE INTENSE STORMS. MOVEMENT WAS NORTHEAST NEAR 45 MPH. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD ACROSS THE AREA TODAY WITH SOME STORMS BECOMING LOCALLY (HEAVY... MAINLY OVER NORTH CENTRAL AND NORTHEAST LOUISIANA.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 9:35 AM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 70 min |
| May 18, 9:35 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Jackson | 70 min |
| May 18, 9:35 AM CDT | Severe Thunderstorm Warning | SHV | Richland | 70 min |
| May 18, 10:00 AM CDT | Severe Thunderstorm Warning | SHV | Franklin | 60 min |
| May 18, 10:10 AM CDT | Severe Thunderstorm Warning | SHV | Madison | 65 min |
| May 18, 10:15 AM CDT | Severe Thunderstorm Warning | SHV | Morehouse, Ouachita | 75 min |
Nearby
Tornado Warnings in Louisiana, 1986Every tornado warning in 1986Tornadoes 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.