The water year just ended was the driest on record for the Tri-Cities, according to the National Weather Service.
Just 3.17 inches of precipitation were measured in Kennewick since Oct. 1, 2013. The October date begins the water year because of the start of the snow pack in the mountains.
The previous record was 3.92 inches in 1963. The weather service has consistent records for Kennewick back to 1948.The month just started is expected to be drier than usual again, and the month also is expected to be warmer than usual, according to the weather service.
Normal precipitation for the Tri-Cities in October is 0.6 inch.
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Normal highs fall from 74 degrees at the start of October to 58 degrees at the end of the month. Normal lows fall from 47 degrees to 39 degrees.
September also was warmer than usual in the Tri-Cities, with temperatures averaging 2.6 degrees above normal, in part because temperatures failed to cool off as much as usual during the nights.
One daily temperature record was tied at Hanford, but none was set, according to the Hanford Meteorological Service, which keeps daily records back to World War II.
The low temperature Sept. 21 was 65 degrees, tying the record set in 1962 for the warmest low for the date.
Temperatures overall at Hanford in September averaged 2.8 degrees above normal. However, there were just three days when the temperature reached at least 90 degrees, compared to a normal for September of six days.
In the Tri-Cities the only day the temperature was in the 90s was Sept. 9, when the temperature reached 91. Highs for the month averaged 81.6 degrees, which was 1.7 degrees above normal, and lows averaged 55.7 degrees, which was 3.4 degrees above normal.
Just 0.01 inch of rain fell in the Tri-Cities, with 0.3 inch the normal. At Hanford precipitation totaled 0.16 inch, which is about half of normal.
If annual precipitation is calculated using the calendar year rather than the water year, measurements are not as far below normal. Precipitation for the calendar year in the Tri-Cities has reached 3.17 inches, which is 1.83 inches below normal.
The peak wind gust in September in the Tri-Cities, as measured in Kennewick, was 27 mph on Sept. 18. The peak gust at Hanford was 42 mph Sept. 30.
-- Annette Cary: 509-582-1533; firstname.lastname@example.org; Twitter: @HanfordNews