2012 WY Precipitation Summary
provided by the California Cooperative Snow Surveys

For the period Oct 1, 2011 to Apr 30, 2012  
Report generated:  05/11/2012 08:05


Summary By River Basin
                                                            Stations Reporting                                Percent of Historic Average 

River Basin 
Stations 
Apr 
Oct-Apr 
Apr 
Oct-Apr 
Season 

SMITH RIVER
1
1
1
188%
108%
 98%
KLAMATH RIVER
5
5
5
148%
 86%
 76%
TRINITY RIVER
3
3
3
114%
 84%
 77%
EEL RIVER
4
3
3
140%
 86%
 80%
RUSSIAN RIVER
4
1
1
109%
 84%
 79%
NORTH SF BAY AREA
4
4
3
122%
 80%
 76%
SOUTH SF BAY AREA
2
2
2
186%
 81%
 77%
SANTA CRUZ - PAJARO RIVER
3
2
2
166%
 68%
 64%
SALINAS RIVER
5
3
3
192%
 74%
 71%
SANTA BARBARA AREA
3
3
3
197%
 79%
 75%
VENTURA - LOS ANGELES AREA
4
3
3
163%
 61%
 59%
SANTA ANA RIVER
5
4
4
164%
 57%
 53%
SAN DIEGO AREA
5
5
4
145%
 77%
 71%
SACRAMENTO VALLEY FLOOR
10
7
7
126%
 76%
 71%
UPPER SACRAMENTO RIVER
6
6
6
192%
 83%
 71%
FEATHER RIVER
10
8
8
169%
 80%
 71%
YUBA - BEAR RIVERS
7
6
6
188%
 87%
 80%
AMERICAN RIVER
9
9
9
172%
 80%
 75%
SAN JOAQUIN VALLEY FLOOR
7
5
4
166%
 67%
 63%
COSUMNES - MOKELUMNE RIVERS
3
2
2
233%
 83%
 77%
CALAVERAS - STANISLAUS RIVERS
1
1
1
106%
 63%
 59%
TUOLUMNE RIVER
5
4
4
164%
 71%
 66%
MERCED - FRESNO RIVERS
4
4
4
141%
 50%
 47%
SAN JOAQUIN RIVER
4
3
3
110%
 63%
 57%
TULARE LAKE BASIN FLOOR
7
7
7
245%
 78%
 73%
KINGS RIVER
2
2
2
160%
 69%
 66%
KAWEAH RIVER
9
8
7
193%
 80%
 74%
TULE RIVER
6
6
6
233%
 90%
 84%
KERN RIVER
4
4
4
176%
 67%
 62%
SURPRISE VALLEY - HONEY LAKE
4
4
4
143%
 65%
 52%
LAKE TAHOE - TRUCKEE RIVER
5
5
5
122%
 71%
 63%
CARSON - WALKER RIVERS
4
3
3
 99%
 49%
 39%
MONO LAKE - OWENS RIVER
9
7
7
 34%
 65%
 55%
DEATH VALLEY
2
2
2
146%
 26%
 20%
MOJAVE DESERT
4
2
2
206%
 65%
 54%
COLORADO DESERT
6
4
4
138%
 45%
 31%




Summary By Hydrologic Region
                                                     Basins Reporting                 Stations Reporting             Percent of Historic Average

Hydrologic Region 
Hydro 
Region 
Weight 
Basins 
Apr 
Oct-Apr 
Stations 
Apr 
Oct-Apr 
Apr 
Oct-Apr 
Wat-Yr 

NORTH COAST
0.27
5
5
5
17
13
13
139.9%
90%
82%
SAN FRANCISCO BAY
0.03
2
2
2
6
6
5
154.3%
80%
76%
CENTRAL COAST
0.06
3
3
3
11
8
8
184.8%
74%
70%
SOUTH COAST
0.06
3
3
3
14
12
11
157.1%
65%
61%
SACRAMENTO RIVER
0.26
5
5
5
42
36
36
169.4%
81%
74%
SAN JOAQUIN RIVER
0.12
6
6
6
24
19
18
153.4%
66%
62%
TULARE LAKE
0.07
5
5
5
28
27
26
201.4%
77%
72%
NORTH LAHONTAN
0.04
3
3
3
13
12
12
121.2%
62%
51%
SOUTH LAHONTAN
0.06
3
3
3
15
11
11
128.8%
52%
43%
COLORADO RIVER
0.03
1
1
1
6
4
4
137.9%
45%
31%
STATEWIDE weighted average
1.00
36
36
36
176
148
144
156.18%
76.36%
69.55%