Tornadoes · United States · Georgia · 2003

F0 tornado, Mora, Georgia, March 20, 2003

This F0 tornado ran 0.1 miles across Atkinson County on March 20, 2003, touching down at 2:15 PM EST. It killed nobody.

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 mphthis tornado

    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 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
F0
Date
March 20, 2003
Touchdown
2:15 PM EST (19:15 UTC)
Path length
0.1 miles (0.2 km)
Path width
0 yards (0 m)
Deaths
0
Injuries
0
County
Atkinson County
Touchdown point
31.420, -82.970
Lift-off point
31.420, -82.970
Record number
6

What the Weather Service recorded

Brief touchdown. Abandoned chicken house near State Road 135 and Bee Scott Rd. destroyed.

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. One was issued for the county at another hour that day.

Issued (UTC)ExpiredProductOffice
13:27 UTC14:15 UTCSevere Thunderstorm WarningJAX
14:12 UTC15:00 UTCSevere Thunderstorm WarningJAX
17:18 UTC18:15 UTCSevere Thunderstorm WarningJAX
17:25 UTC18:15 UTCTornado WarningJAX
19:09 UTC20:00 UTCSevere Thunderstorm WarningJAX
19:20 UTC20:00 UTCTornado WarningJAX

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, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 13:23 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.

Jacksonville, FL (KJAX), 12:00Z

7.3 hours before the tornado, 159 km from the path. March 20, 2003.

Skew-T log-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2003-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1354 joules per kilogram, CIN -49, lifted condensation level 703 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 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, Jacksonville, FL at 12:00Z on 2003-03-20The 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 242 square meters per square second, 0 to 6 km bulk shear 57 knots.19395878Sfc1 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
1354 J/kg
Mixed-layer CIN
-49 J/kg
Surface CAPE
529 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
57 kt
0-1 km bulk shear
32 kt
0-1 km storm-relative helicity
242 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
1.9
Supercell composite
9.3
0-3 km lapse rate
5.0 K/km

Open this sounding in Storm Lab

Jacksonville, FL (KJAX), 00:00Z

4.7 hours after it, 159 km from the path. March 21, 2003.

Skew-T log-pSkew-T log-p diagram, Jacksonville, FL at 00:00Z on 2003-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1164 joules per kilogram, CIN -17, lifted condensation level 1317 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 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, Jacksonville, FL at 00:00Z on 2003-03-21The 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 99 square meters per square second, 0 to 6 km bulk shear 45 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
1164 J/kg
Mixed-layer CIN
-17 J/kg
Surface CAPE
1489 J/kg
Mixed-layer LCL
1317 m above ground
0-6 km bulk shear
45 kt
0-1 km bulk shear
22 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.4
0-3 km lapse rate
7.4 K/km

Open this sounding in Storm Lab

The surface observations

Alma/Bacon Co. (AMG), 46 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
17:31 UTC75.269.8300° 3 kt1008.1VCTS
17:53 UTC7671330° 3 kt1007.8VCTS
18:02 UTC75.271.6260° 3 kt1007.8VCTS
18:28 UTC6864.4290° 9 kt281006.8-TSRA BR
18:34 UTC6864.4230° 7 kt171007.5-TSRA BR
18:53 UTC7066 4 kt1007.5VCTS
19:07 UTC69.864.4 3 kt1007.5BR
19:21 UTC69.864.40° 0 kt1007.1VCTS BR
19:25 UTC6864.4290° 4 kt1007.8TSRA BR
19:37 UTC66.264.4270° 20 kt271007.8+TSRA FG
19:45 UTC66.260.8 6 kt271007.5-TSRA
19:53 UTC6864 3 kt1006.8+TSRA BR
19:59 UTC6864.40° 0 kt1006.8-TSRA BR
20:11 UTC69.864.40° 0 kt1006.8TS
20:24 UTC69.866.2130° 3 kt1007.1
20:53 UTC7167170° 9 kt151008.1VCTS BR

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

This ground now

The live radar over the trackEvery 2003 tornado in GeorgiaEvery tornado in Georgia since 1950Warnings in force in Georgia nowThe forecast where you are

The other tornadoes of March 20, 2003

4 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 202:50 AM CSTF2Jackson, FL8.03003$500,000
March 205:05 AM ESTF3Mitchell, GA25.06006200$6.8 million
March 201:25 PM ESTF0Bacon, GA0.10
March 201:35 PM ESTF0Wayne, GA0.10

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.