2008-07-15_REPORT - M1988044

• Permit No: M1988044
• IBM Index Class Name: REPORT
• Doc Date: 7/15/2008
• Doc Name: Annual Report
• From: SES
• To: DRMS
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: AJW
• Media Type: D
• Archive: No

The ENSO is currently in a transition from La Nina conditions to neutral conditions.
The pool of cold water in the Pacific has thinned greatly, but there is nod sign of the
development of an El Nino condition. It is common for La Nina like weather patterns to
' persist for several months after the demise of that climatic pattern. Over; the last year large
scale wind flow over Colorado has persisted in a northwesterly direction which cuts off
southern moisture and creates low humidity surface conditions along and east of the
' Continental Divide. This may persist well into autumn or could change at any time. This
pattern is also a major factor in the near record flooding in Iowa and Missouri.
Following is a summary table of the last 18 months of weather data.

enver i mate - January through June 08
mean
temp departure total
reci departure
Jan 07 20.8 -8.4 0.6 0.04
Feb 07 29.1 -4.1 0.4 -0.13
Mar 07 46.1 6.5 0.6 -0.71
Apr 07 46.8 -0.8 2.7 0.72
May 07 .0 0.8 1.8 -0.53
Jun 07 g68.8 1.2 0.5 -1.04
Jul 07 .3 3.0 0.4 -1.73
Aug 07 .4 3.7 2.8 0.94
Sep 07 65.1 2.7 0.5 -0.60
Oct 07 53.5 2.5 3.0 2.04
Nov 07 41.4 3.9 0.2 -0.73
Dec 07 26.7 -3.6 0.6 -0.03
Jan 08 27.9 -1.3 0.1 -0.43
Feb 08 34.0 0.1 0.2 -0.34
Mar 08 39.6 0.0 0.2 -1.11
Apr 08 46.1 -1.5 0.3 -1.61
May 08 55.9 -1.3 1.6 -0.76
Jun 08 67.4 -0.2 0.7 -0.83

SUMMARIES: precipitation
mean for period 48.8 0.2 normal % of normal
total precip 17.0 -6.84 23.88 71%
winter 07/08 33.9 -0.2 1.2 -2.64 3.8 32%
spring 08 56.5 -1.0 2.6 -3.20 5.81 45%
Jan-Mar 07 32.0 -2.0 1.5 -0.80 5.81 250/0
Apr-Jun 07 57.9 0.4 5.0 -0.85 5.81 85%
Jul-Oct 07 67.6 3.0 6.8 0.65 5.81; 116%
From this table it is apparent just how dry it has been since November 2007 (considered start
of winter 2007/2008). It is also apparent just how favorable the 2007 growing season was, especially
' mid to late summer (August, more specifically). Keep in mind when examining this table, the
separation of the different months is based upon an ecological and biological growth basis relevant to
the local environment rather than the normal climatic four season breakdown. Thus, April through
Status report for 2007
(July 15, 2007) Page 7 of 10