Narrative Summary - April 2007

April 2007 was cooler than normal, averaging 52.4ºF, 1.1º below normal (53.5ºF). The warmest April
(1994) averaged 58.2ºF, while the coldest (1955) averaged 47.5ºF. No daily temperatures records were
established during April 2007.




Precipitation for April 2007 totaled 0.26 inches, 59% of normal (0.44 inch).  The wettest April (2003) 

received 2.23 inches, while the driest (1999 and earlier years) received only a trace.  Total precipitation 

for 2007 (through April) is 1.90 inches, 75% of normal (2.57 inches).  



The average wind speed for April 2007 was 8.5 miles per hour (mph), which was 0.3 mph below normal 

(8.8 mph).  The windiest April (1959 and 1972) averaged 11.1 mph, while the April with the lightest 

winds (2004) averaged 7.2 mph. The peak gust for April 2007 was 49 mph on April 9.  The record wind 

gust for April was 73 mph in 1972.




The monthly climatological data summaries, as well as other information, are available on the Internet.  

Address:  http://hms.pnl.gov/ 



For additional information contact: 




Ken Burk373-3215


HMS Staff373-2716




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.