EF1 tornado, Tennille to Davisboro, Georgia, January 21, 2017

1. EF065 to 85 mph

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

2. EF186 to 110 mphthis tornado

   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.

Rating

EF1

Date

January 21, 2017

Touchdown

1:45 PM EST (18:45 UTC)

Lifted

1:49 PM EST (18:49 UTC)

On the ground

4 minutes

Path length

1.3 miles (2.1 km)

Path width

300 yards (274 m)

Deaths

0

Injuries

0

Property damage

$50,000

County

Washington County

Touchdown point

32.924, -82.779

Lift-off point

32.938, -82.764

Record number

1701211245-01

27 damage points were recorded along this path by NWS FFC, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 110 mph.

• mobile home rolled and destroyed, car also rolled, and multiple trees uprooted.
• multiple small diameter frees snapped
• medium sized tree snapped and large tree uprooted
• shingles off of house nearby to the WNW

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

Throughout the weekend of the 21st and 22nd, persistent southwesterly upper-level flow brought a series of strong short waves across the region. The atmosphere over central Georgia was unseasonably warm and unstable with strong low and mid-level shear. The first short wave generated a wave of severe thunderstorms across central and south Georgia through the morning and into the afternoon of the 21st that produced numerous tornadoes. Twenty three tornadoes were confirmed in the WFO Peachtree City warning area with 27 total tornadoes confirmed in the state of Georgia, both records for the number of tornadoes in a single day. A second, stronger short wave swept through during the late morning and afternoon of the 22nd bringing another round of severe weather to central and south Georgia. Additional tornadoes confirmed brought the 2-day total to 27 for the WFO Peachtree City warning area and 41 for the state of Georgia, both a record number for a 2 day period.

A National Weather Service survey team found that a EF1 tornado with maximum wind speeds of 110 MPH and a maximum path width of 300 yards began around the intersection of Highway 68 and Hayes Road south of Tennille. The tornado travelled north-northeast for around two and a half miles before ending along Boatright Road south of Grady Mertz Road. Numerous trees were downed and two trailers were severely damaged. [01/21/17: Tornado #20, County #1/1, EF1, Washington, 2017:021].

A National Weather Service survey team found that a EF1 tornado with maximum wind speeds of 100 MPH and a maximum path width of 300 yards began along Grady Mertz Road near the intersection with Shurling Davis Road southeast of Tennille. The tornado travelled east along Shurling Davis Road before turning north and moving up Thompson Road, ending at Holmes Cannery Road. Numerous trees were downed and a trailer was rolled and destroyed. [01/21/17: Tornado #21, County #1/1, EF1, Washington, 2017:022].

A National Weather Service survey team found that a EF1 tornado with maximum wind speeds of 100 MPH and a maximum path width of 300 yards began around the intersection of Sunhill Road and Sunhill Grange Road. The tornado moved northeast across mainly rural areas of eastern Washington County along and near Highway 24, ending northeast of Davisboro. Numerous trees were downed including dozens of pecan trees in a large commercial orchard. [01/21/17: Tornado #22, County #1/1, EF1, Washington, 2017:023].

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

18 minutes of warning. NWS FFC issued a tornado warning for this county at 18:27 UTC, 18 minutes before the tornado touched down, in force until 19:01 UTC.

The county was under a tornado watch, issued at 17:46 UTC and running to 20:00 UTC.

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 Storm Prediction Center had this point in a Enhanced Risk, with a 0.10 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 16:27 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 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.

Sandersville (OKZ), 7 km from the path, in the two hours either side.

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

The Robins AFB radar (KJGX), 61 km away, was scanning. The volume nearest the touchdown began at 18:46 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.

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

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

The live radar over the trackEvery 2017 tornado in GeorgiaEvery tornado in Georgia since 1950Warnings in force in Georgia nowThe forecast where you are

59 more were confirmed in the United States that day.

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.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.