An evident trend (0.05 in/hr/decade, or 1.3 mm/hr/decade) over 1948–2023 is statistically significant at the 5% rejection rate.
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Increasing extreme hourly precipitation risk for New York City after Hurricane Ida.
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The sentences
The blue and red lines show a significant trend; 1948–1992 (blue) is the period of the first significant trend, and 1948–2023 (red) capturing the overall trend.