Tornadoes · United States · Mississippi · 1987

F1 tornado, Amite and Lincoln counties, Mississippi, March 17, 1987

This F1 tornado ran 3.0 miles across Amite and Lincoln counties on March 17, 1987, touching down at 7:25 PM CST and reaching 120 yards wide. It killed nobody, and did $5,000 to $50,000 of property damage.

The rating scale

Tracks are drawn in the color of the rating. The Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  1. F040 to 72 mph

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F173 to 112 mphthis tornado

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2113 to 157 mph

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. F3158 to 206 mph

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. F4207 to 260 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. F5261 to 318 mph

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating
F1
Date
March 17, 1987
Touchdown
7:25 PM CST (01:25 UTC)
Path length
3.0 miles (4.8 km)
Path width
120 yards (110 m)
Deaths
0
Injuries
0
Property damage
$5,000 to $50,000
Counties
Amite and Lincoln counties
Touchdown point
31.320, -90.650
Lift-off point
31.350, -90.620
Record number
39

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Jackson, MS (KJAN), 00:00Z

1.4 hours before the tornado, 121 km from the path. March 18, 1987.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 1987-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 83 joules per kilogram, CIN -15, lifted condensation level 622 meters above ground. Wind barbs in knots down the right edge.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. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Jackson, MS at 00:00Z on 1987-03-18The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 554 square meters per square second, 0 to 6 km bulk shear 76 knots.1939587897Sfc1 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. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
83 J/kg
Mixed-layer CIN
-15 J/kg
Surface CAPE
90 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
76 kt
0-1 km bulk shear
40 kt
0-1 km storm-relative helicity
554 m²/s²
0-3 km storm-relative helicity
785 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3
0-3 km lapse rate
5.4 K/km

Open this sounding in Storm Lab

Jackson, MS (KJAN), 12:00Z

10.6 hours after it, 121 km from the path. March 18, 1987.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 1987-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 0 joules per kilogram, CIN -3143, lifted condensation level 1408 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Jackson, MS at 12:00Z on 1987-03-18The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity -85 square meters per square second, 0 to 6 km bulk shear 75 knots.1939587897Sfc1 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. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
-3143 J/kg
Surface CAPE
3 J/kg
Mixed-layer LCL
1408 m above ground
0-6 km bulk shear
75 kt
0-1 km bulk shear
15 kt
0-1 km storm-relative helicity
-85 m²/s²
0-3 km storm-relative helicity
-157 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.4 K/km

Open this sounding in Storm Lab

This ground now

The live radar over the trackEvery 1987 tornado in MississippiEvery tornado in Mississippi since 1950Warnings in force in Mississippi nowThe forecast where you are

The other tornadoes of March 17, 1987

10 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 171:45 AM CSTF0Lamar, TX0.210$50,000 to $500,000
March 175:20 AM CSTF1Anderson, TX0.21013$5,000 to $50,000
March 177:00 AM CSTF0San Augustine, TX8.050
March 174:50 PM CSTF0Claiborne, MS0.450$50,000 to $500,000
March 175:02 PM CSTF1Adams, MS5.01004$500,000 to $5 million
March 175:30 PM CSTF1Jefferson, MS3.0100$50,000 to $500,000
March 177:40 PM CSTF0Collin, TX0.210
March 178:00 PM CSTF0Walthall, MS0.573$5,000 to $50,000
March 178:20 PM CSTF1Tangipahoa Parish, LA13.050
March 1710:15 PM CSTF1Jones, MS9.073$50,000 to $500,000

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.