Tornadoes · United States · North Carolina · 2012

EF0 tornado, Rodanthe, North Carolina, August 19, 2012

This EF0 tornado ran 0.0 miles across Dare County on August 19, 2012, touching down at 2:19 PM EDT and reaching 20 yards wide. It killed nobody.

The rating scale

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

  1. EF065 to 85 mphthis tornado

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

  2. EF186 to 110 mph

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

  3. EF2111 to 135 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. EF3136 to 165 mph

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

  5. EF4166 to 200 mph

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

  6. EF5over 200 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
EF0
Date
August 19, 2012
Touchdown
2:19 PM EDT (18:19 UTC)
Path length
0.0 miles (0.0 km)
Path width
20 yards (18 m)
Deaths
0
Injuries
0
County
Dare County
Touchdown point
35.608, -75.466
Lift-off point
35.608, -75.466
Record number
1208191219-01

What the Weather Service recorded

A weak upper level disturbance combined with a stationary boundary produced a brief waterspout that moved onshore near Rodanthe during the early afternoon hours of August 19th, 2012.

Public reported that a waterspout moved onshore near the Rodanthe Campground. No damage was reported.

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.

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 16:23 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.

Newport, NC (KMHX), 12:00Z

6.3 hours before the tornado, 158 km from the path. August 19, 2012.

Skew-T log-pSkew-T log-p diagram, Newport, NC at 12:00Z on 2012-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 1089 joules per kilogram, CIN -28, lifted condensation level 821 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, Newport, NC at 12:00Z on 2012-08-19The 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 38 square meters per square second, 0 to 6 km bulk shear 39 knots.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. 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
1089 J/kg
Mixed-layer CIN
-28 J/kg
Surface CAPE
239 J/kg
Mixed-layer LCL
821 m above ground
0-6 km bulk shear
39 kt
0-1 km bulk shear
6 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.7
0-3 km lapse rate
4.6 K/km

Open this sounding in Storm Lab

Newport, NC (KMHX), 00:00Z

5.7 hours after it, 158 km from the path. August 20, 2012.

Skew-T log-pSkew-T log-p diagram, Newport, NC at 00:00Z on 2012-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 207 joules per kilogram, CIN -84, lifted condensation level 851 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, Newport, NC at 00:00Z on 2012-08-20The 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 146 square meters per square second, 0 to 6 km bulk shear 34 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
207 J/kg
Mixed-layer CIN
-84 J/kg
Surface CAPE
1030 J/kg
Mixed-layer LCL
851 m above ground
0-6 km bulk shear
34 kt
0-1 km bulk shear
27 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8
0-3 km lapse rate
4.9 K/km

Open this sounding in Storm Lab

The surface observations

Dare County Gunnery Range (2DP), 40 km from the path, in the two hours either side.

Time (UTC)Temp (°F)Dew point (°F)WindGust (kt)Pressure (mb)Weather
16:23 UTC7775.2 1 kt1012.2-SHRA
16:48 UTC78.873.420° 2 kt1011.5
16:55 UTC78.875.38130° 9 kt121011.5
17:03 UTC80.675.2110° 12 kt161011.2
17:39 UTC78.875.2 6 kt1011.5
17:55 UTC78.2672.86130° 5 kt1011.2
18:14 UTC7773.4 1 kt1011.5-SHRA
18:44 UTC75.273.470° 4 kt1011.5RA VCTS
18:49 UTC75.273.440° 3 kt1011.5+TSRA
18:55 UTC74.6672.6870° 8 kt1011.2+TSRA
18:59 UTC75.273.460° 7 kt1011.5+TSRA
19:04 UTC75.273.440° 6 kt1011.9+TSRA BR
19:09 UTC73.473.4330° 12 kt151011.5+TSRA BR
19:14 UTC73.471.6300° 12 kt191012.5+TSRA BR
19:19 UTC73.471.6320° 10 kt191012.5+TSRA BR
19:24 UTC71.669.8 6 kt1012.2+TSRA BR
19:29 UTC71.669.8330° 7 kt1012.2+RA BR VCTS
19:34 UTC71.669.8360° 5 kt1012.2+RA VCTS
19:39 UTC71.669.8360° 4 kt1012.2TSRA
19:44 UTC71.669.8360° 4 kt1012.2-TSRA
19:49 UTC71.669.810° 4 kt1012.2-TSRA
19:54 UTC71.671.630° 5 kt1012.5-RA VCTS
19:55 UTC7270.8830° 5 kt1012.5-RA
20:04 UTC71.671.620° 9 kt1012.5-RA
20:14 UTC71.669.820° 7 kt1012.5-RA

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

The radar

The Morehead City radar (KMHX), 158 km away, was scanning. The volume nearest the touchdown began at 18:19 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 2012 tornado in North CarolinaEvery tornado in North Carolina since 1950Warnings in force in North Carolina nowThe forecast where you are

The other tornadoes of August 19, 2012

1 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
August 196:45 PM CDTEF0Rankin, MS0.130

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.