Predicting Winter Precipitation By: Tony Cummings

Problem Winter precipitation is major issue Georgia is not as prepared Seasonal forecast would be helpful Already forecast seasonal temperatures

Data Same data as undergraduate research KATL and KAHN from 1973-2007 ASOS data Used Matlab script to decode

Methodology Decode Data Analyze data Linear Correlations [corr()] Periodograms [periodogram()] Cross spectral Analysis cspd() mscohere() angle() .

Correlations

Periodograms

Zoomed Periodograms

Cross Spectral Analysis

Phase angle

Conclusions Temps and Hours of precipitation are statistically correlated Strong 6 year precipitation cycle Cross Spectral Analysis results mixed Precipitation predictions similar to temperature predictions