Nolan 2005WaterYearMiniPoster

The 2005 Water Year Nolan Doesken and Roger Pielke, Sr Atmospheric Science Department, Colorado State University In Rev...

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The 2005 Water Year Nolan Doesken and Roger Pielke, Sr Atmospheric Science Department, Colorado State University

In Review

8.0 6.0 4.0 2.0 0.0 -2.0 -4.0 Oct

Nov

Dec

Eastern Plains

Jan

Feb

Mar

Foothills

Apr

May

Mountains

Jun

Jul

Aug

Sep

Western Valleys

Water Year 2005 temperature departures from 19711971-2000 average.

Colorado Statewide Average Winter (Dec-Feb) Temperature Time Series 33

Temperature

Based on 48 month SPI (1890 - September 2005)

0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0

Year

Fraction of Colorado in LongLong-Term Drought

April 1 2005 Snowpack for Colorado

Colo Statewide Ave Summer (Jun-Aug) Temperature Time Series

Average Temperature

Temperature

Average Temperature

70

31

69 68 Temperature (deg F)

29 Temperatuure (deg F)

Fraction of Colorado in Drought 1.0

Fraction (in percent)

Departure (Degrees Fahrenheit)

10.0

1890 1892 1894 1896 1898 1900 1902 1904 1906 1908 1910 1912 1914 1916 1918 1920 1922 1924 1926 1928 1930 1932 1934 1936 1938 1940 1942 1944 1946 1948 1950 1952 1954 1956 1958 1960 1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004

► Snow blitz across southern Rockies. ► NearNear-average snowpack in the South Platte basin. ► Mild winter (12th in a row). ► Beneficial April and early June precipitation. ► A hot and dry July. ► Below average growing season precipitation. ► A saving DenverDenver-metro rain August 33-5th. ► Overall – Above average temperature, near to slightly below average precipitation. ► October 2005 – Great moisture on the Plains!

Water Year 2005

27 25 23 21

67 66 65 64 63 62

19 61

17

18 95 19 00 19 05 19 10 19 15 19 20 19 25 19 30 19 35 19 40 19 45 19 50 19 55 19 60 19 65 19 70 19 75 19 80 19 85 19 90 19 95 20 00 20 05

18 95 19 00 19 05 19 10 19 15 19 20 19 25 19 30 19 35 19 40 19 45 19 50 19 55 19 60 19 65 19 70 19 75 19 80 19 85 19 90 19 95 20 00 20 05

60

Summer 2005 (May – September) precipitation as a percent of the 19711971-2000 average.

Colorado Statewide Reservoir Levels on October 1st for Years 1997- 2004 and Oct 1, 2005 140

Percent of Average

120

100

80

60

40

20

Water Year 2005 precipitation as a percent of the 19711971-2000 average.

WY2005 daily hydrographs, provisional data provided by the USGS.

O ct 1. 20 05

O ct 1. 20 04

O ct 1. 20 03

O ct 1. 20 02

O ct 1. 20 01

O ct 1. 20 00

O ct 1. 19 99

O ct 1. 19 98

O ct 1. 19 97

0

Colorado’ Colorado’s statewide reservoir storage graph. The 2005 reservoir storage remained below average.