Snow Course Measurements for January 2009

January measurements received as of Friday, January 9, 05:01 PM

Snow depth and water content are in inches. April 1 averages are based on measurements made during years 1951-2000. Courses are grouped by river basins, listed in north-south and high-low elevation order. Contact Dave Rizzardo for more information.

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Num         Name                 Elev.  Date     Depth  Water   Density  April 1 Average
                                                       Content
                              Feather River Basin
361 Kettle Rock               7,300		Scheduled for measurement by CA Dept of Water Resources, Beckwourth
359 Grizzly Ridge             6,900	29-DEC	 32.5	  7.1	22%	 30.4	 23%	
 75 Church Meadows            6,700	30-DEC	 38.5	  9.6	25%	 30.7	 31%	
280 Rowland Creek             6,700	02-JAN	 17.4	  3.3	19%	 17.4	 19%	
360 Mount Hough               6,700	31-DEC	 26.8	  6.3	24%	 30.7	 21%	
353 Frenchman Cove            5,800	02-JAN	 11.2	  2.1	19%	  2.1	100%	*
354 Antelope Ridge            5,650	01-JAN	 13.3	  2.6	20%	  3.0	 87%	*
355 Abbey                     5,650	29-DEC	 19.5	  3.7	19%	  9.0	 41%	
                                                Basin Average Pct. of April 1:  27%
                                                                     January 1:  73%
                              Yuba River Basin
 65 Castle Creek 5            7,400		Scheduled for measurement by Central Sierra Snow Lab
                              American River Basin
365 Alpha                     7,600		Scheduled for measurement by CA Dept of Water Resources/Snow Surveys
108 Echo Summit               7,450		Scheduled for measurement by Placerville Ranger District
110 Lake Audrain              7,300	29-DEC	 45.0	 11.7	26%	 35.3	 33%	
113 PHillips                  6,800	30-DEC	 40.6	 10.1	25%	 27.6	 37%	
320 Lyons Creek               6,700	05-JAN	 43.4	 12.5	29%	 31.8	 39%	
289 Tamarack Flat             6,550		Scheduled for measurement by CA Dept of Water Resources/Snow Surveys
                                                Basin Average Pct. of April 1:  36%
                                                                     January 1:  98%

Summary of Snow Surveys

Region	No. Basins	No. Courses	Avg WC	% Average April 1	% Average January 1
North Coast
Sacramento	2	10	6.4"	24%	66%
San Joaquin Valley
Tulare Lake
North Lahontan
South Lahontan
Statewide Average (weighted)				9%	24%

* This course not included in river, basin or Statewide computations.

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 hourly during the data-collection period.

hart@water.ca.gov

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