from which these data were collected. This report contains updated historical information for temperature, precipitation, wind, normal and extreme values of temperature and precipitation, and other miscellaneous meteorological parameters. Further, the data are adjunct to and update Hoitink et al. (1999Hoitink et al. ( , 2000Hoitink et al. ( , 2001Hoitink et al. ( , 2002Hoitink et al. ( , 2003Hoitink et al. ( , 2004 and Hoitink and Burk (1994, 1996, 1997; however, data from Appendix B -Wind Climatology (Hoitink and Burk 1994) are excluded.Calendar year 2004 was warmer than normal 2 at the Hanford Meteorology Station with an average temperature of 54.6°F, 1.0°F above normal (53.6°F). The hottest temperature was 107°F on August 13, while the coldest was -14°F on January 5. For the 12-month period, 7 months were warmer than normal, and 5 months were cooler than normal.Precipitation for 2004 totaled 7.96 inches, 114% of normal (6.98 inches); calendar year snowfall totaled 22.9 inches (compared to the normal of 15.4 inches). The 11.4 inches of snow which fell on January 1 was the greatest amount ever recorded during a 24-hour period. The previous record was 10.2 inches on February 18-19, 1993.Calendar year 2004 had an average wind speed of 7.0 miles per hour (mph), 0.6 mph below normal (7.6 mph). There were 22 days with peak gusts ≥40 mph, compared to a yearly average of 27 days. The peak gust during the year was 63 mph on January 30. Throughout this document the term "normal" is used to indicate climatological normal, defined as an average value over a period of years of any meteorological element such as temperature, pressure, and rainfall. The convention uses a 30-year time period, ending with the last year of a given decade (such as 1951-1980, 1961-1990, 1971-2000).
