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Understanding Record Precipitation in the United States

June 17, 2026 · The Clime Team
Understanding Record Precipitation in the United States

Record precipitation refers to the highest amount of rainfall or snowfall recorded over a specific period in a particular location. In the United States, these records are meticulously documented by agencies like the National Weather Service (NWS) and the National Oceanic and Atmospheric Administration (NOAA).

What Defines Record Precipitation?

Record precipitation is quantified based on the total amount of water—liquid or frozen—that falls from the atmosphere to the Earth's surface within a defined timeframe. This measurement is crucial for understanding weather patterns, assessing flood risks, and planning agricultural activities.

Notable Instances of Record Precipitation in the U.S.

  • Holt, Missouri (June 22, 1947): A staggering 12 inches (305 millimeters) of rain fell in just one hour, setting a national record for the most rainfall in a single hour. (weather.gov)

  • Waipā Garden, Kauai, Hawaii (April 14-15, 2018): Over a 24-hour period, 49.69 inches (1,262 millimeters) of rain were recorded, marking the highest daily rainfall in the U.S. (kisters.net)

  • Alvin, Texas (July 25-26, 1979): During Tropical Storm Claudette, 42 inches (1,067 millimeters) of rain fell in 24 hours, setting a previous record for the highest daily rainfall in the U.S. (learn.weatherstem.com)

Factors Contributing to Record Precipitation

Several factors can lead to record precipitation events:

  • Geographical Features: Mountains and valleys can influence weather patterns, leading to increased rainfall in certain areas.

  • Atmospheric Conditions: Warm, moist air masses colliding with cooler air can result in heavy rainfall.

  • Climate Change: Rising global temperatures can increase the atmosphere's capacity to hold moisture, potentially leading to more intense precipitation events.

Impacts of Record Precipitation

While essential for replenishing water supplies, record precipitation can also have significant adverse effects:

  • Flooding: Excessive rainfall can overwhelm drainage systems, leading to widespread flooding.

  • Soil Erosion: Heavy rains can wash away topsoil, affecting agriculture and natural habitats.

  • Infrastructure Damage: Intense rainfall can damage roads, bridges, and buildings, leading to costly repairs.

How Clime Helps You Stay Informed

Staying informed about weather conditions is crucial, especially during periods of heavy rainfall. Clime offers advanced weather monitoring tools that provide real-time data, forecasts, and alerts tailored to your location. With Clime, you can access detailed precipitation forecasts, receive timely alerts about severe weather events, and make informed decisions to protect your property and loved ones.

Conclusion

Record precipitation events highlight the dynamic nature of our climate and the importance of staying informed. By understanding these events and utilizing tools like Clime, you can better prepare for and respond to extreme weather conditions.

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Frequently Asked Questions