California Department of Water Resources
Division of Flood Management

Snow Course Measurements for January 2001

January measurements received as of Friday, February 2, 03:16 PM

Snow depth and water content are in inches. April 1 averages are based on measurements made during years 1946-1995. Courses are grouped by river basins, listed in north-south and high-low elevation order. Contact Dave Hart for more information.

Num         Name                 Elev.  Date     Depth  Water   Density  April 1 Average
                                                       Content
                              Feather River Basin
361 Kettle Rock               7,300	28-DEC	 15.7	  4.6	29%	 23.1	 20%	
359 Grizzly Ridge             6,900	29-DEC	 20.8	  5.9	28%	 29.7	 20%	
 75 Church Meadows            6,700	27-DEC	 16.6	  4.9	30%	 32.4	 15%	
360 Mount Hough               6,700	27-DEC	 18.6	  5.5	30%	 29.5	 19%	
280 Rowland Creek             6,700	26-DEC	 11.2	  2.9	26%	 17.3	 17%	
353 Frenchman Cove            5,800	26-DEC	  1.7	  0.6	35%	  2.3	 26%	
354 Antelope Ridge            5,650	26-DEC	  5.2	  1.5	29%	  3.2	 47%	
355 Abbey                     5,650	26-DEC	  9.9	  2.3	23%	  8.8	 26%	
                                                Basin Average Pct. of April 1:  24%
                                                                     January 1:  55%
                              Yuba River Basin
 65 Castle Creek 5            7,400	30-DEC	 30.2	  9.0	30%	 51.6	 17%	
391 Lexington                 5,600	28-DEC	 18.2	  5.8	32%	 28.8	 20%	
                                                Basin Average Pct. of April 1:  19%
                                                                     January 1:  44%
                              American River Basin
365 Alpha                     7,600		Scheduled for measurement by CA Dept of Water Resources
108 Echo Summit               7,450		Scheduled for measurement by Placerville Ranger District
110 Lake Audrain              7,300	28-DEC	 27.3	  7.3	27%	 35.4	 21%	
111 Darrington                7,100	04-JAN	 21.9	  6.1	28%	 29.9	 20%	
113 PHillips                  6,800	04-JAN	 22.6	  6.3	28%	 28.1	 22%	
320 Lyons Creek               6,700	28-DEC	 28.1	  9.2	33%	 31.2	 29%	
289 Tamarack Flat             6,550	04-JAN	 22.3	  6.0	27%	 27.1	 22%	
                                                Basin Average Pct. of April 1:  23%
                                                                     January 1:  54%

Summary of Snow Surveys

RegionNo. BasinsNo. CoursesAvg WC% Average
April 1		% Average
January 1
North Coast
Sacramento 3 15 5.2" 23% 53%
San Joaquin Valley
Tulare Lake
North Lahontan
South Lahontan
Statewide Average (weighted) 8% 20%

THIS SUMMARY MAY NOT MATCH THAT PUBLISHED IN BULLETIN 120 DUE TO CHANGES IN AVERAGES AND COURSE SELECTION. USE ONLY FOR COMPARISONS BETWEEN YEARS

Data are preliminary and subject to revision. This document is updated every 30 minutes during the data-collection period.

hart@water.ca.gov

Webmaster

Revised: February 02, 2001 03:17