2017 opened to cold temperatures followed by rain and today the first significant snow in Reno this winter. Since the beginning of the stormy weather here in the central Sierra surrounding Lake Tahoe, snowpack has gone from well below the 1981-2010 average to now above that 30 year average. Total precipitation, however, continues above average since October with at least one station around Tahoe currently reporting  greater than 170% of average.

The National Weather Service is forecasting more rain for lower elevations and snow in higher areas of the Sierra. “Heavy rain” is in the forecast for Saturday and Sunday for Reno.

Currently there are concerns about flooding on the Truckee River through the Truckee Meadows although flooding is expected to be only moderate perhaps similar to that experienced in 2005. Hopefully, damages will be minimal. While the community completed a flood management project proposal prior to 2005, it has still not been implemented in the Truckee Meadows.

The impact of heavy mountain snow and rain in lower elevations increases the likelihood that the Truckee River may see moderate flooding all the way to Pyramid Lake. Such an event should have a significant positive effect on the river environment by helping to restore meanders and provide new or rearranged gravel bars for seedlings of cottonwood, willow, and alder trees to become established. Areas that have been restored by the Nature Conservancy downstream of the Truckee Meadows using federal funding (think – Lockwood to the McCarran Ranch) could see even more benefits from high water that spills onto the restored flood plain.

Let’s keep our fingers crossed that it helps get the Truckee River up to and beyond its long term average flow for 2017. [Typically, the western water year is measured from October 1 to September 30; so the first full month of fall kicks off the water year.]

So here’s where we are today (January 5, 2017) with Lake Tahoe water level, Truckee River flows at 3 locations (taken early morning), and snowpack measurements and annual precipitation at 2 locations.  We’ll look again after the approaching storm is over next week.  [CFS stands for cubic feet per second and the percent of average is compared to the 30 year period from 1981-2010. “Snow water equivalent” measures the amount of water in a column of snow. “Total precipitation” is all rain and water content of snowfall, etc.]

Lake Tahoe water elevation	6223.68	8.2″ above rim
Truckee River Flow at Reno (changes daily)	722 CFS	–
Truckee River Flow at Tracy (changes daily)	1,480 CFS	–
Truckee River Flow at Pyramid Lake	1,360 CFS	–
Ward Creek site (848) at 6745 ft: Snow water equivalent in snowpack	13.3 inches	112% ave
Ward Creek site (848) at 6745 ft: Snowpack depth	72 inches	–
Ward Creek site (848) at 6745 ft: Total precipitation	48.4 inches	175% ave
Mt Rose Ski Area at 8801 ft: Snow water equivalent in snowpack	22.6 inches	154% ave
Mt Rose Ski Area at 8801 ft: Snowpack depth	103 inches	–
Mt Rose Ski Area at 8801 ft: Total precipitation	29.7 inches	143% ave

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