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EF1 tornado in Alexander County, North Carolina

Tornado October 23, 2017 · Alexander County, North Carolina

EF1
Rating
11.3 mi
Whole path
500 yd
Path width
$2.0M
Damage as recorded

NOAA records this tornado county by county. Its path ran through Burke County → Catawba County → Caldwell County → Alexander County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 500 yards (0.28 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 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

NWS storm survey found the path of a tornado that initially straddled the Caldwell/Alexander County line, roughly paralleling Icard Ridge Rd as it moved almost due north across far western Alexander County. Numerous trees were uprooted and snapped. The tornado path was lost in the vicinity of Caldwell Pond Rd, just south of Highway 64. However, additional tornado damage was found several miles away along Highway 64. The area between these two points was heavily wooded and largely inaccessible, but based upon the almost due north orientation of this damage path, and the more northeast orientation of the damage along Highway 64, they are treated as separate events.

The wider storm

A band of rain showers along and ahead of a strong cold front quickly intensified during the afternoon across Upstate South Carolina, then moved quickly northeast into the North Carolina foothills and far western Piedmont. Multiple severe and/or tornadic thunderstorms developed within the line, with multiple tornadoes, some of which were quite strong, reported across the area. This was the second tornado outbreak to impact the this area in just over two weeks, and for the most part, the same counties that were impacted on October 8th were once again affected on the 23rd. Meanwhile, moderate to heavy rain falling throughout the morning hours, followed by a brief period of intense rainfall associated with the band of rain showers resulted in areas of flooding and flash flooding near the eastern escarpment of the Blue Ridge.

Began near Bethlehem (35.8160, -81.3380).

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 725266. Narratives are written by the National Weather Service forecast office that issued the report.

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