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EF0 tornado in Assumption Parish, Louisiana

Tornado April 27, 2015 · Assumption Parish, Louisiana

EF0
Rating
0.6 mi
Path length
75 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 75 yards (0.04 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 mesocyclone embedded in the squall line produced another tornado initially touching down in an area of softwood pine trees west of Bayouside Street. Trees had large branches snapped, and EF-0 damage was noted. The path width was only 25 yards at this point. The tornado then moved to the southeast and crossed Louisiana Highway 402 causing additional EF-0 damage. Several trees had large branches snapped off, and a few trees were uprooted. No visible damage to any structures was noted. The path width in this area was approximately 75 yards wide. The tornado crossed Louisiana Highway 1 and Bayou Lafourche just south of Hospital Road, causing additional tree damage. The tornado then crossed Louisiana Highway 308 south of Dodge Road, where additional tree damage in the form of large branches removed from hardwood trees was noted. All of this damage was rated EF-0, and the path width narrowed to 25 yards. No damage was noted beyond this point.

The wider storm

A strong upper level low over the southern Rockies aided in the development of surface low pressure over north Texas on the 26th. As this low moved east along a stationary front over Louisiana and Mississippi, a strong line of thunderstorms developed during the early morning hours of the 27th. This line of storms moved rapidly across southeast Louisiana during the daylight hours of the 27th. Numerous reports of thunderstorm wind damage were received, primarily downed trees and power lines. Several meso-cyclones embedded in the southern potion of the squall line spawned weak tornadoes.

Began near Pierre Pass (30.0037, -91.1981).

Other tornadoes from the same storm system

4 more tornadoes the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 564640. Narratives are written by the National Weather Service forecast office that issued the report.

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