EF0 tornado, Duke, Florida, June 7, 2020

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.

Rating

EF0

Date

June 7, 2020

Touchdown

4:05 PM EDT (20:05 UTC)

Path length

0.0 miles (0.0 km)

Path width

25 yards (23 m)

Deaths

0

Injuries

0

County

Union County

Touchdown point

29.939, -82.388

Lift-off point

29.939, -82.388

Record number

2006071405-01

3 damage points were recorded along this path by NWS JAX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 74 mph.

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

Deep tropical moisture was in place (PWAT 2.5) with the area on the east side of TS |Cristobal as the storm approached the LA Gulf Coast. Waves of moderate to heavy rainfall with isolated embedded thunderstorms pivoted northward across the local forecast area into the evening with a more solid band of moderate to heavy rainfall developing across north Florida as low level convergence increased between a lifting frontal zones across south-central FL and a persistent low level ridge axis holding firm just north of the Altamaha River basin. This ridge will limit the northward extend/expansion of the convective band into Sun, and generally focused a W-E oriented swath of heavy rainfall generally near and south of the I-10 corridor overnight into Sunday morning on 6/7. The ridge strengthened north of the Altamaha Region Sun afternoon 6/7, which shunt the corridor of heavy rain SSW toward the I-75 corridor of NE FL with drier mid level air (700-500 mb) decreasing rain chances across SE GA and eastern NE FL into Sun evening. In addition to heavy rainfall potential, there was a low tornado threat for NE FL into the evening of 6/6 with elevated 0-1 km shear values 20-25 kts with low level ESE winds under increasing SSW winds out of the GOMEX, with speeds increasing to 35-45 kts at 850 mb through 06z Sun 6/7.

A weak EF0 tornado with peak winds near 75 mph briefly touched down just north of New River and just south of SW County Road 18A where it produced structure damage including roof damage to a shed, a porch, gazebo, and a pump house. Trees were blown down at a property along SW 43rd Terrace.

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

1 minute of warning. NWS JAX issued a tornado warning for this county at 20:04 UTC, 1 minute before the tornado touched down, in force until 20:45 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 Marginal Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 19:59 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.

Gainesville Regional (GNV), 30 km from the path, in the two hours either side.

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

The Jacksonville radar (KJAX), 90 km away, was scanning. The volume nearest the touchdown began at 20:03 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 2020 tornado in FloridaEvery tornado in Florida since 1950Warnings in force in Florida nowThe forecast where you are

10 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.