F1 tornado, Johnson City, Texas, November 16, 2004

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 mphthis tornado

   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.

Rating

F1

Date

November 16, 2004

Touchdown

8:40 PM CST (02:40 UTC)

Path length

12.0 miles (19.3 km)

Path width

300 yards (274 m)

Deaths

0

Injuries

0

County

Blanco County

Touchdown point

30.370, -98.500

Lift-off point

30.500, -98.400

Record number

976

The tornado was reported to the Blanco County Sheriffs Office near the intersection of US290E and US281, just south of Johnson City. This tornado was observed by a deputy as it tracked toward the northeast. It was estimated to be 200 yards wide and continued along its path for nearly 7 miles. It struck a home on the southwest edge of Johnson City causing minor roof damage. The tornado lifted and disappeared near 2035CST. It was rated an F0 on the Fujita Scale.

The storm that produced the first Blanco County tornado continued toward the northeast and produced a second tornado near 2040CST. This tornado was also observed by the Blanco County deputy as it moved toward the northeast. It was wider...at times approaching 300 yards wide. It lifted up and down and did not appear to touch the ground much of the time. It continued on its path over open country for almost 12 miles and dissipated near 2100CST. It was rated an F1 on the Fujita Scale.

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

12 minutes of warning. NWS EWX issued a tornado warning for this county at 02:28 UTC, 12 minutes before the tornado touched down, in force until 03:00 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 00:55 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.

Burnet Municipal/Kate Craddock (BMQ), 39 km from the path, in the two hours either side.

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

The Austin/San Antonio radar (KEWX), 91 km away, was scanning. The volume nearest the touchdown began at 02:37 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.

The live radar over the trackEvery 2004 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas nowThe forecast where you are

8 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.