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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan <br />Volume 2 — Hazard Inventory <br />Snowfall amounts for a given event duration and return period, based on Twin Cities data from 1900- <br />2015. <br />Using the same data somewhat differently, we can assess the expected frequency of common daily <br />snowfall amounts. <br />Frequency with which a daily snowfall total at a point in Hennepin County will equal or exceed a given <br />amount: <br />4.3.11.9. Indications and Forecasting <br />The Twin Cities/Chanhassen forecast office of the National Weather Service is the official forecasting <br />authority for major winter weather events affecting Hennepin County. High -intensity winter storms are <br />usually well anticipated by the numerical weather prediction models, often up to a week in advance, and <br />forecasters tend to have high awareness of potentially dangerous winter conditions two days or more <br />before they develop. <br />179 <br />