Executive Update

Hydrologic Conditions in California (06/30/2008)

Snowpack Water Content
Region	Water Content (in inches)	% Avg to Date	% April 1 Avg (2)
Northern Sierra	---	--- (3)	---
Central Sierra	---	--- (3)	---
Southern Sierra	---	--- (3)	---
Statewide	---	--- (3)	---

(2)	April 1 is the date of normal maximum accumulation for the season.
(3)	'Percent Average to Date' is not calculated this early in the WY when the historical average is small.

Forecast of Regional Water Supply Indices (5)
Index	Value	Year Type
8 River Index for May (in 1000 AF)	2,670	n/a
Sacramento Valley Water Year Type Index (40-30-30) @ 50%	5.4	Critical
Sacramento Valley Water Year Type Index (40-30-30) @ 90%	5.0	Critical
San Joaquin Valley Water Year Type Index (60-20-20) @ 50%	2.2	Dry
San Joaquin Valley Water Year Type Index (60-20-20) @ 75%	2.1	Critical

(4)	For more information see Sacramento & San Joaquin Valley Water Year Type Index forecast: Latest | Previous     (issued monthly from December 1 through May 1)

Key Reservoir Storage As of 06/29/2008 midnight
Reservoir	River	Storage (in 1000 AF)	Avg Storage (in 1000 AF)	% Average	Capacity (in 1000 AF)	% Capacity	Flood Control (6) Encroachment (in 1000 AF)
Trinity Lake	Trinity	1,563	2,129	73	2,448	64	---
Shasta Lake	Sacramento	2,418	3,735	65	4,552	53	-2,134
Lake Oroville	Feather	1,530	2,948	52	3,538	43	-2,008
New Bullards Bar Res	Yuba	721	829	87	966	75	-245
Folsom Lake	American	478	831	58	977	49	-499
New Melones Res	Stanislaus	1,288	1,517	85	2,420	53	-1,132
Don Pedro Res	Tuolumne	1,351	1,599	84	2,030	67	-679
Lake McClure	Merced	459	732	63	1,025	45	-566
Millerton Lake	San Joaquin	337	416	81	520	65	-183
Pine Flat Res	Kings	421	698	60	1,000	42	-525
Isabella	Kern	253	308	82	568	45	-250
San Luis Res	(Offstream)	680	1,362	50	2,039	33	---

(5)	Temporary encroachment into seasonally reserved flood storage space; requirements can vary considerably on a daily basis due to numerous variables: rainfall amounts, anticipated snowmelt, time of year, soil moisture, etc.

Selected Cities Precipitation Accumulation As of 06/29/2008
	Jul 1 to Date 2007 - 2008 (in inches)	% Avg	Jul 1 to Date 2006 - 2007 (in inches)	% Avg	% Avg Jul 1 to Jun 30 2007 - 2008
Eureka	34.19	90	35.48	93	89
Redding	24.02	72	22.73	68	71
Sacramento	13.71	76	10.88	61	76
San Francisco	15.55	77	11.63	58	77
Fresno	8.40	75	6.03	54	74
Bakersfield	2.38	37	3.06	47	36
Los Angeles	13.53	89	3.21	21	89
San Diego	7.25	67	3.85	36	67

Comments

As of July 1, Water Year 2008 statewide hydrologic conditions were as follows: precipitation, 85 percent of average to date; runoff, 60 percent of average to date; and reservoir storage, 75 percent of average for the date. As of June 10, the date of the last forecast for this water year, the projected median April-July runoff for the water supply basins ranged from 78% (Kings River) to 47% (Tule River). Spring of 2008 has turned out to be extremely dry. The Water Year 2008, Northern Sierra 8-Station Precipitation Index seasonal total of 34.8 inches is now less than last year's seasonal total of 36.0 inches at this time. March and April 2008 were each the sixth driest of those months on record. For the 8-Stations, the Water Year 2008 combined March through June total precipitation is only 3.4 inches, the driest on record (since 1921). The Water Year 2008, 8-Station Index, October through June total of 34.8 inches is the 18th driest year out of 88 years of record. The 2-year combined total precipitation for Water Years 2007 (37.2 inches) and 2008 is 72.0 inches, the 9th driest 2-year period on record. The latest National Weather Service Climate Prediction Center (CPC) long-range weather outlook for July 2008, issued June 30, 2008, is forecasting average precipitation for all of California. Updates to the Executive Summary will generally be issued weekly through the wet months of winter and spring. Beginning about June 1, this product is updated monthly through the dry season during the summer and fall. The next update of this product will be issued about Tuesday, August 12, 2008, unless there are significant hydrologic changes.