Alert archive / Louisiana / Tornado Warnings in 1986

Tornado Warning 24, NWS Shreveport, LA

May 18, 1986Franklin Parish, Madison Parish, Tensas Parish, Louisiana

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

TimeReportWhereRemark
May 18, 11:05 AM CDTTornado F0Madison, LA
May 18, 11:15 AM CDTHail 1Tensas, LA
May 18, 11:25 AM CDTHail 1.75Madison, 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 1986-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 286 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 1986-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
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

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 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.

IssuedProductOfficeCountiesLasted
May 18, 9:35 AM CDTSevere Thunderstorm WarningSHVNatchitoches, Winn70 min
May 18, 9:35 AM CDTSevere Thunderstorm WarningSHVCaldwell, Jackson70 min
May 18, 9:35 AM CDTSevere Thunderstorm WarningSHVRichland70 min
May 18, 10:00 AM CDTSevere Thunderstorm WarningSHVFranklin60 min
May 18, 10:10 AM CDTSevere Thunderstorm WarningSHVMadison65 min
May 18, 10:15 AM CDTSevere Thunderstorm WarningSHVMorehouse, Ouachita75 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.