Tornadoes · United States · Alabama · 1965

F3 tornado, Jackson and DeKalb counties, Alabama, April 15, 1965

This F3 tornado ran 9.6 miles across Jackson and DeKalb counties on April 15, 1965, touching down at 5:15 PM GMT-6 and reaching 50 yards wide. It killed nobody and injured 2, and did $50,000 to $500,000 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 mph

    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 mphthis tornado

    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
F3
Date
April 15, 1965
Touchdown
5:15 PM GMT-6 (23:15 UTC)
Path length
9.6 miles (15.4 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
2
Property damage
$50,000 to $500,000
Counties
Jackson and DeKalb counties
Touchdown point
34.700, -85.750
Lift-off point
34.700, -85.580
Record number
191

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.

Nashville Metro, TN (KBNA), 12:00Z

11.3 hours before the tornado, 180 km from the path. April 15, 1965.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 1965-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1 joules per kilogram, CIN -261, lifted condensation level 1095 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, Nashville Metro, TN at 12:00Z on 1965-04-15The 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 513 square meters per square second, 0 to 6 km bulk shear 63 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
1 J/kg
Mixed-layer CIN
-261 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1095 m above ground
0-6 km bulk shear
63 kt
0-1 km bulk shear
48 kt
0-1 km storm-relative helicity
513 m²/s²
0-3 km storm-relative helicity
523 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.7 K/km

Open this sounding in Storm Lab

Nashville Metro, TN (KBNA), 00:00Z

0.7 hours after it, 180 km from the path. April 16, 1965.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 1965-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 246 joules per kilogram, CIN -28, lifted condensation level 1312 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, Nashville Metro, TN at 00:00Z on 1965-04-16The 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 -115 square meters per square second, 0 to 6 km bulk shear 78 knots.1939587897117136Sfc1 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
246 J/kg
Mixed-layer CIN
-28 J/kg
Surface CAPE
163 J/kg
Mixed-layer LCL
1312 m above ground
0-6 km bulk shear
78 kt
0-1 km bulk shear
20 kt
0-1 km storm-relative helicity
-115 m²/s²
0-3 km storm-relative helicity
-49 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.7
0-3 km lapse rate
7.7 K/km

Open this sounding in Storm Lab

The surface observations

Chattanooga/Lovell (CHA), 56 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
22:00 UTC7465190° 22 kt281002
23:00 UTC6059260° 13 ktTS SHRA
00:00 UTC6160160° 7 kt1004.7
01:00 UTC6159200° 7 kt

From the Iowa Environmental Mesonet's archive of airport observations.

This ground now

The live radar over the trackEvery 1965 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of April 15, 1965

6 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
April 153:45 AM GMT-6F2Caldwell, TX6.950
April 151:50 PM GMT-6F2Fentress, TN5.9327$5,000 to $50,000
April 154:13 PM GMT-6F3Cumberland, TN6.52001$50,000 to $500,000
April 155:25 PM GMT-5F3Bradley, TN10.460050$500,000 to $5 million
April 156:30 PM GMT-5F2Knox, TN7.42006$500,000 to $5 million
April 158:00 PM GMT-5F2Dawson, GA11.533$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.