EF1 tornado, Liverpool to Sugarland Jct, Texas, August 25, 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

August 25, 2017

Touchdown

12:50 AM CDT (05:50 UTC)

Lifted

12:53 AM CDT (05:53 UTC)

On the ground

3 minutes

Path length

1.6 miles (2.5 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

Property damage

$1.0 million

Counties

Brazoria and Fort Bend counties

Touchdown point

29.438, -95.450

Lift-off point

29.455, -95.467

Record number

1708252350-01

Harvey made landfall as a category 4 hurricane near Rockport, Texas during the evening of August 25th. The storm then weakened to a tropical storm and slowed, looping back and tracking over SE Texas then back over the Gulf of Mexico making a second landfall along the Louisiana coast during the early morning hours of August 30th. Over that 5 day period over Southeast Texas TS Harvey produced catastrophic flooding with a large area of 30 to 60 inches of rain, 23 tornadoes, tropical storm force winds and a moderate storm surge near Matagorda Bay. In some of the heavier bands rain fell at a rate of over 5 inches per hour. This copious record amount of rain over a led to catastrophic flooding. Thousands of homes, businesses, and roads were flooded due to flash flooding and sheet flow from long duration intense rain. Main stem rivers and adjoining tributaries, creeks and bayous reached full capacity and came out of their banks and this also contributed to the massive flooding across southeastern Texas.

A tornado touched down just west of Liverpool. It took down 4 power poles on highway 35 along with several trees near the Gulf Coast Speedway. The tornado then traveled across generally open field before damaging some barns and outbuildings as well as trees on County Road 511.

An EF-1 tornado touched down southeast of Juliff and tracked from Brazoria into Fort Bend County. Damage occurred to some roofs Several trees there were either snapped or downed. Damage path crossed county line from Brazoria to Fort Bend County. This entry is for the Brazoria County segment.

An EF-1 tornado touched down southeast of Juliff and tracked from Brazoria into Fort Bend County. Damage occurred to some roofs Several trees there were either snapped or downed. Damage path crossed county line from Brazoria to Fort Bend County. This entry is for the Fort Bend County segment.

Tornado tracked across Sienna Plantation subdivision downing trees and damaging roofs on about 25 homes. Vieux Carre Ct and Steve Ct were hardest hit.

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

11 minutes of warning. NWS HGX issued a tornado warning for this county at 05:39 UTC, 11 minutes before the tornado touched down, in force until 06:00 UTC.

The county was under a tornado watch, issued at 19:02 UTC and running to 06:49 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 00:58 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.

Houston SW (AXH), 7 km from the path, in the two hours either side.

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

The Houston radar (KHGX), 37 km away, was scanning. The volume nearest the touchdown began at 05:52 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 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.