Narrative Summary - November 1999

November 1999 was the 3rd warmest November on record, averaging 45.8ºF, 5.6º above normal
(40.2ºF). The average temperature for every day after November 5 was normal or above, with the
period from November 8 through 17 averaging 11.4º above normal. The maximum temperature of
76ºF on November 13 was the warmest temperature ever recorded in November, breaking the
record of 75ºF recorded just the day before, and also on November 3, 1975. The warmest
November occurred in 1990 and averaged 46.5ºF, while the coolest was 24.8ºF in 1985. The
following daily temperature records were established in November:

                          New          Old
Date   Category          Record       Record     Year
 12    High Maximum        75           65       1991
 13    High Maximum	   76*          64       1987

*Warmest temperature ever recorded in November.  Previous record 75ºF on 
 November 12, 1999 and November 3, 1975.

Precipitation for November 1999 totaled 0.26 in., 29% of normal (0.91 in.) The wettest
November, in 1996, received 2.67 in., while November 1976 received only a trace. No snowfall
was recorded during November 1999, compared to a normal of 1.8 in. The snowiest November
(1985) received 18.3 in., while many Novembers have been without snow. Total precipitation since
January 1 was 3.68 in., 70% of normal (5.23 in.).

The average wind speed for November 1999 was 7.5 miles per hour (mph), 1.1 mph above normal
(6.4 mph). The windiest November on record averaged 10.0 mph (1990), while the November with
the lightest winds (1956) averaged 2.9 mph. The peak gust for the month was 41 mph on
November 8. The record wind gust for November was 67 mph in 1993.

Autumn 1999 (September, October and November) was warmer and drier than normal. The
average temperature was 54.2ºF, 1.3º above normal (52.9ºF). The warmest autumn (1990)
averaged 57.1ºF, while the coolest (1985) averaged 44.5ºF. Precipitation totaled 0.74 in., 46% of
normal (1.60 in.). The wettest autumn (1973) received 4.79 in., while the driest (1976) received
only 0.04 in.

The monthly climatological data summaries, as well as other information, are available
on the Internet. Address: http://etd.pnl.gov:2080/HMS/. Hanford Site personnel can
access the HMS Intranet site at: http://hms.rl.gov/

For additional information contact:
Ken Burk373-3215
Dana Hoitink372-6414

Note: The information in this summary pertains specifically to
the Hanford Meteorology Station (HMS), which is located
approximately 25 miles northwest of Richland, Washington. No
attempt should be made to infer meteorological conditions at other
locations from these data.