Tornadoes · United States · Alabama · 1999

F2 tornado, Nector, Alabama, February 27, 1999

This F2 tornado ran 0.4 miles across Blount County on February 27, 1999, touching down at 7:15 PM CST and reaching 50 yards wide. It killed nobody and injured 1, and did $90,000 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 mphthis tornado

    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
F2
Date
February 27, 1999
Touchdown
7:15 PM CST (01:15 UTC)
Path length
0.4 miles (0.6 km)
Path width
50 yards (46 m)
Deaths
0
Injuries
1
Property damage
$90,000
County
Blount County
Touchdown point
33.930, -86.650
Lift-off point
33.930, -86.650
Record number
152

What the Weather Service recorded

A brief tornado occurred about 3.5 miles northwest of Locust Fork around 7:15 pm. The tornado crossed County Road 13 moving in a northerly direction. Two large metal barns were demolished, a sturdy brick home lost a portion of its roof, and a small wood frame house was completely deroofed. One minor injury occurred in the wood frame house. Several large hay bales were strewn across CR 13 and two vehicles were nearly blown off the road. Numerous trees in the area were uprooted or snapped off.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

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

Issued (UTC)ExpiredProductOffice
00:58 UTC01:45 UTCSevere Thunderstorm WarningBMX

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 forecast that day

The Storm Prediction Center had this point in a Slight Risk. The outlook in force was issued at 01:07 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

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.

Birmingham, AL (KBMX), 00:00Z

1.3 hours before the tornado, 84 km from the path. February 28, 1999.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 1999-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 412 joules per kilogram, CIN -3, lifted condensation level 672 meters above ground. Wind barbs in knots down the right edge.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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, Birmingham, AL at 00:00Z on 1999-02-28The 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 304 square meters per square second, 0 to 6 km bulk shear 37 knots.1939587897117Sfc1 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
412 J/kg
Mixed-layer CIN
-3 J/kg
Surface CAPE
574 J/kg
Mixed-layer LCL
672 m above ground
0-6 km bulk shear
37 kt
0-1 km bulk shear
36 kt
0-1 km storm-relative helicity
304 m²/s²
0-3 km storm-relative helicity
393 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.3
0-3 km lapse rate
6.0 K/km

Open this sounding in Storm Lab

Birmingham, AL (KBMX), 12:00Z

10.7 hours after it, 84 km from the path. February 28, 1999.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 1999-02-28Temperature 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 -70547, lifted condensation level 1056 meters above ground. Wind barbs in knots down the right edge.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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, Birmingham, AL at 12:00Z on 1999-02-28The 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 -204 square meters per square second, 0 to 6 km bulk shear 73 knots.1939587897117Sfc1 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
-70547 J/kg
Surface CAPE
43 J/kg
Mixed-layer LCL
1056 m above ground
0-6 km bulk shear
73 kt
0-1 km bulk shear
28 kt
0-1 km storm-relative helicity
-204 m²/s²
0-3 km storm-relative helicity
-78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.6 K/km

Open this sounding in Storm Lab

The radar

The Birmingham radar (KBMX), 85 km away, was scanning. The volume nearest the touchdown began at 01:17 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

This ground now

The live radar over the trackEvery 1999 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of February 27, 1999

8 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
February 2712:05 PM CSTF0Madison, IL0.250
February 273:25 PM CSTF3Lawrence, MS17.0440$200,000
February 274:00 PM CSTF1Union, KY3.01002$200,000
February 275:50 PM CSTF0Lawrence, MS1.050$30,000
February 275:55 PM CSTF2Lauderdale, AL1.7150$140,000
February 276:25 PM CSTF0Winston, AL0.530$10,000
February 277:51 PM CSTF0Etowah, AL1.350$30,000
February 2711:00 PM CSTF1Saint Charles Parish, LA0.80$100,000

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.