Colorado River Presented by CWCB and Colorado Attorney General's Office 2005

• Description: Colorado River Presented by CWCB and Colorado Attorney General's Office 2005
• State: CO
• Title: Colorado River Presented by CWCB and Colorado Attorney General's Office 2005
• Water Supply Pro - Doc Type: Meeting

Auqust 3, 2005 Forecast of Colorado River Flow into
Lake Powell (1) (Million Acre -feet)
Change From Last
USBR and National Weather Service Month's Projected
April -July Water Year 2005 April -July Wat Yr 2005
Maximum (2) 8.810 13.284 -0.890 -1.064
Mean 8.810 * 12.984 ** -0.290 -0.364
Minimum (2) 8.810 12.684 0.310 0.336
* This month's A -J observed is 111% of the 30 -year A -J average shown below.
** This month's W -Y projected is 108% of the 30 -year W -Y average shown below.
Comparison with past records
of Colorado River
inflow into Lake Powell
(at Lee Ferry prior to 1962)
April
-July Flow
Water Year Flow
Long -Time Average (1922 -2004)
7.887
11.699
30 -yr. Average (1961 -90)
7.735
11.724
10 -yr. Average (1995 -2004)
7.027
11.260
Max. of Record
15.404 (1984)
21.873 (1984)
Min. of Record
1.115 (2002)
3.058 (2002)
2003
3.918
6.358
2004
3.640
6.128
(1) Under conditions of no other Upper Basin reservoirs.
(2) USBR and NWS forecasts indicate the probability of 19 chances out of
20 that the actual flow will not exceed the maximum value, and will not be
less than the minimum value.