Following the methodology presented by Hart and Grumm (2001), the western United States events are ranked objectively based upon their standardized anomalies method of pressure weighted anomalies by variable. The degree of rarity for an event is determined by the departure of these fields from climatology.
Specific event types are investigated by examining historical events and their associated anomalies. Event types investigated include Pacific Northwest windstorms, coastal heavy rain events and heat waves. The anomalies associated with ten historical storms in each event type will be summarized. Historical events included in this examination include the Columbus Day storm of 1962, the 1997 California New Year's Day flood event, and the California heat wave of 2006.