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Tornado in Mercer County, North Dakota

Tornado August 30, 2025 · Mercer County, North Dakota

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Not rated

0.5 mi

Path length

50 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 50 yards (0.03 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

Not rated. NOAA lists no rating for this tornado. Ratings come from surveying damage, and the National Weather Service now records “EFU” (unknown) when a tornado hit nothing a survey team could rate.

What the National Weather Service wrote

The tornado touched down in an open field south of Zap and impacted no structures. There was no damage to evaluate. By National Weather Service policy the tornado is rated EF-U (Unknown).

The wider storm

Isolated showers and a few weak thunderstorms developed in cyclonic flow to the north of a low pressure system centered over central South Dakota. A short lived landspout tornado developed south of Zap in Mercer County. The tornado touched down in an open field and impacted no structures. There was no damage to evaluate. By National Weather Service policy the tornado is rated EF-U (Unknown).

Began near Zap (47.1200, -101.9300).

Source: NOAA Storm Events Database, event 1291497. Narratives are written by the National Weather Service forecast office that issued the report.

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