Narrative Summary - June 1998

June 1998 was warmer than normal, averaging 71.0ºF, 1.3º above normal
(69.7ºF). There were 7 days in June with maximum temperatures >= 90ºF (normal
for June is 9 days). There were no days with maximum temperatures >= 100ºF
(normal is 2). For the year (through June) there have been 11 days with maximum
temperatures >= 90ºF (normal is also 11 days), and no days >= 100ºF (normal is 2
days). June was the eleventh consecutive month with above normal average
temperatures, dating back to August 1997. The warmest June averaged 76.8ºF
(1992); while the coolest averaged 63.0ºF (1953). There were no daily
temperature records established during June 1998.

Precipitation for June 1998 totaled 0.48 inch, 126% of normal (0.38 inch). The
wettest June, in 1950, received 2.92 inches; while the driest, in 1986 and 1979,
received only a trace. Total precipitation since January 1, 1998 totals 3.96
inches, 124% of normal (3.18 inches).

June 1998's average wind speed was 9.8 miles per hour (mph), compared to a
June normal of 9.1 mph. The peak wind gust for the month was 50 mph recorded
on June 15. The record wind gust for June was 72 mph in 1957. The windiest
June averaged 10.7 mph (1983); while the June with the lightest winds (1950)
averaged 7.7 mph.

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.