Tornadoes · United States · Alabama · 2023

EF0 tornado, Wheeler Lake North to Ripley, Alabama, August 10, 2023

From Wheeler Lake North to Ripley, this EF0 tornado ran 7.7 miles across Limestone County on August 10, 2023, touching down at 2:21 AM CDT and reaching 225 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 10, 2023
Touchdown
2:21 AM CDT (07:21 UTC)
Lifted
2:28 AM CDT (07:28 UTC)
On the ground
7 minutes
Path length
7.7 miles (12.3 km)
Path width
225 yards (206 m)
Deaths
0
Injuries
0
County
Limestone County
Touchdown point
34.781, -87.242
Lift-off point
34.736, -87.121
Record number
2308100121-01

The damage survey

16 damage points were recorded along this path by NWS HUN, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 85 mph.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

What the Weather Service recorded

A line of strong to severe thunderstorms raced east-southeast from the Ozarks through the mid South during the evening hours of the 9th and into the Tennessee Valley during the early morning hours of the 10th. The line produced several reports of wind damage and one EF-0 tornado in Limestone County.

Damage was consistent with a high-end EF-0 tornado with maximum winds of 85 mph. The tornado was on the ground for approximately 7 minutes and had a maximum width of 225 yards. Damage indicators were a mix of softwood and hardwood trees, uprooted or partially snapped along the path. The tornado formed on the northern shore of Wheeler Lake on Little Elk Road, downing softwood trees at this location. The tornado crossed Snake Road to the southeast, downing and uprooting additional softwood trees along Bay Hill and Bay Shore Drives. Several homes at this location sustained significant damage to docks as trees fell on them, with uprooted trees causing damage as well to retaining walls and sprinkler systems in this area. At this point, the tornado crossed the open waters along the north shore of Wheeler Lake before coming ashore again just before Davis Road. Several trees were uprooted along with very large, snapped branches here. One home sustained damage in this area as a tree fell on the back side of the structure. While the tree looked snapped, the health of the tree looked to be in question which likely led to its quick failure. The tornado then crossed an inlet and uprooted several more trees along Beechwood Road, before continuing to the Brigadoon neighborhood. Significant and more widespread tree damage was noted in this neighborhood as trees were uprooted, power poles knocked down, and large branches snapped. The tornado continued to follow the northern shore of Wheeler Lake but began weakening. Damage, much less widespread compared to areas further west, was observed along Beech Fork Lane and sporadic tree damage through Shaw Road. The tornado dissipated just east of Shaw Road.

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
18:55 UTC22:48 UTCSevere Thunderstorm WatchHUN
19:53 UTC20:30 UTCSevere Thunderstorm WarningHUN
20:28 UTC21:15 UTCSevere Thunderstorm WarningHUN
21:27 UTC23:30 UTCFlood WarningHUN

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 General Thunderstorms Risk. The outlook in force was issued at 05:07 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.

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

7.4 hours before the tornado, 161 km from the path. August 10, 2023.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2023-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 13 joules per kilogram, CIN -104, lifted condensation level 840 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, Nashville Metro, TN at 00:00Z on 2023-08-10The 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 79 square meters per square second, 0 to 6 km bulk shear 45 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
13 J/kg
Mixed-layer CIN
-104 J/kg
Surface CAPE
748 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
45 kt
0-1 km bulk shear
12 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
340 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0
0-3 km lapse rate
5.5 K/km

Open this sounding in Storm Lab

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

4.6 hours after it, 161 km from the path. August 10, 2023.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2023-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 38 joules per kilogram, CIN -65, lifted condensation level 567 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, Nashville Metro, TN at 12:00Z on 2023-08-10The 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 131 square meters per square second, 0 to 6 km bulk shear 68 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
38 J/kg
Mixed-layer CIN
-65 J/kg
Surface CAPE
80 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
68 kt
0-1 km bulk shear
16 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
4.2 K/km

Open this sounding in Storm Lab

The radar

The Northeast Alabama radar (KHTX), 102 km away, was scanning. The volume nearest the touchdown began at 07:20 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.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)ReportWhereCountyRemark
07:07 UTCTSTM WND DMG3 Sw AndersonLauderdale, ALReport of large tree limbs snapped NW of Rogersville.
07:50 UTCTSTM WND DMG6 Nw Owens CrossroadsMadison, ALTree down on powerlines on Todd Mill Rd.
07:52 UTCTSTM WND DMG1 E Redstone ArsenalMadison, ALPublic report of several trees uprooted and snapped on the Redstone Arsenal at Vincent Dr and Phoenix Rd. Time estimated by radar.
07:56 UTCTSTM WND DMG6 Se Redstone ArsenalMadison, ALTree down at Indigo at Grissom Apartments near Meadowbrook Drive in south Huntsville. Report and photo from social media. Time estimated from radar.
07:57 UTCTSTM WND GST 60Huntsville InternationaMadison, ALASOS station KHSV Huntsville.
08:00 UTCTSTM WND DMG5 Ese HuntsvilleMadison, ALSeveral tree limbs down along with some home siding damage.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the trackEvery 2023 tornado in AlabamaEvery tornado in Alabama since 1950Warnings in force in Alabama nowThe forecast where you are

The other tornadoes of August 10, 2023

5 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
August 102:08 PM EDTEF1Gloucester, NJ0.770
August 103:08 PM EDTEF1Burlington, NJ0.3100
August 107:41 PM CDTUnratedKingsbury, SD0.625
August 107:47 PM CDTEF0Clark, SD0.990
August 108:10 PM CDTUnratedKingsbury, SD1.125

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.