Storm Type (Weaver 1962)	Water Vapor (Sealevel Dewpoints)	Orographic Effects (Precip augmentation by topography)	Instability	CA Mountain Snowfall/ Snowline In central Sierra Nevada	CA Precip Total Expectation
Middle Latitude	Moderate (Td=45^o to 50^os)	Moderate to Strong (Topographic augmentation and downstream rainshows relatively strong)	Moderate	Moderate to Hvy 5000 feet (1" rain = 8" snow)	Moderate Coast Mod/Hvy Mtns
High Latitude	Limited (Td=30^os to lower 40^os)	Weak (Wind flow more parallel to ridge lines, hence variation in rainfall amounts from high to low elevations the least marked of the storm types)	Strong (Dew Points are low, but temps aloft are cold)	Hvy but Low Water Content 3000 feet (1" rain = 12" snow)	Lgt Coast Mod Mtns (Heavy snow, but small water content)
Low Latitude	Great (Td= upper 50^os to 60^os)	Strong (Topographic augmentation and downstream rainshows extremely marked. Large disparity between upslope and downwind precipitaiton amounts)	Weak Mod/Strong	Rain Low Elev Mod/Hvy Snow High Water Ct 7000 feet (1" rain = 4" snow)	Very Hvy Mtns Mod/Hvy Coast and Very Light amounts in downwind valleys)

Qualitative Overview of Various Parameters Associated with Major CA

Wave Cyclone Types in Northern and Central California (after Weaver 1962)