Greatest rainfall in one hour
- Who
- Holt, Missouri
- What
- 304.8 millimetre(s)
- Where
- United States (Holt)
- When
- 22 June 1947
On 22 June 1947, an unprecedented 304.8 mm (12 inches) of rain fell in just 42 minutes at Holt, Missouri, USA.
Heavy and persistent rainfall had led to flooding across northern Missouri and the wettest June on record there since 1888.