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EF0 tornado in Wakulla County, Florida

Tornado April 19, 2019 · Wakulla County, Florida

EF0
Rating
18.1 mi
Whole path
150 yd
Path width

NOAA records this tornado county by county. Its path ran through Liberty County → Wakulla County → Leon County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 150 yards (0.09 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

A tornado initially touched down in the Apalachicola National Forest in Liberty county and caused minor tree damage which was surveyed along numerous Forest Roads. When the tornado crossed into Wakulla county, a property owner along Smith Creek Road reported trees down at their address, which was relayed to the NWS by the Wakulla County Sheriff's department. The tornado continued northeast into southwest Leon county where it remained in the forest and continued to cause minor tree damage. The tornado dissipated before reaching Bloxham Cutoff Road, or any populated areas in Leon county.

The wider storm

This event was characterized by a mid-level shortwave becoming negatively tilted in the Tennessee Valley and attendant surface low pressure. The strong wind field associated with this system included another anomalously strong low-level jet, with 925 hPa winds sampled on the 12Z/19 TAE Sounding around 40 knots! This advected warm, moist, and unstable air northward, ahead of a pre-frontal trough which served as a focusing mechanism for convection. Instability was initially lacking Thursday Night, but increased on Friday, with Mixed Layer CAPE ranging from 1-1.5k J/kg. Furthermore, the 12Z/19 TAE Sounding revealed Surface Based CAPE of nearly 2.4k J/kg, which is a record for the date per SPC Sounding Climatology! The instability and Bulk Shear (0-6 km) over 50 knots overcame the poorer mid-level lapse rates, and the QLCS intensified as it moved east of the Flint and Apalachicola Rivers on Friday. Despite Shear (0-1 km) around 35 knots on the 12Z/19 TAE Sounding, the hodograph revealed a more unidirectional wind within this layer, however there may have been slightly more veering based on the nearby observations from TLH.

Began near Smith Creek (30.2112, -84.6820).

Source: NOAA Storm Events Database, event 822206. Narratives are written by the National Weather Service forecast office that issued the report.

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