1. A 30-Year Climatology of Hourly Precipitation Across the Western Carolinas Scott Krentz Charles Dalton

2. Overview Test Hypothesis Previous 10-year Study Methodology Results Unexpected Observation Concluding Remarks

3. Previous 10-year Analysis Only used KGSP data Qualitatively compared to KAVL Verified forecasters observations Hypothesized temporal relationship between mountain and non-mountain precipitation

4. Methodology 30-year hourly datasets from NCDC 3 ASOS sites – 6 FP sites Data quality controlled (outliers < 0.1%) Hourly precipitation and frequencies Spreadsheets Charts

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15. Unexpected Observation

20. Definite Warm-Season Frequency Shift Climatological Basis for Forecasts and Seasonal Staffing Additional Study Removing Tropical Precipitation Potential for Study of July Mountain Precipitation Decrease Conclusions