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Rain on Snow up to 7,000 - 8,000 feet in Clearwater Basin above Dworshak Reservoir Jan 26, 2015 IDWR State Water Supply Meeting Feb 13, 2015 Ron Abramovich.

Published byBlake Allison Modified over 8 years ago

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Presentation on theme: "Rain on Snow up to 7,000 - 8,000 feet in Clearwater Basin above Dworshak Reservoir Jan 26, 2015 IDWR State Water Supply Meeting Feb 13, 2015 Ron Abramovich."— Presentation transcript:

1 Rain on Snow up to 7,000 - 8,000 feet in Clearwater Basin above Dworshak Reservoir Jan 26, 2015 IDWR State Water Supply Meeting Feb 13, 2015 Ron Abramovich Water Supply Specialist USDA NRCS Snow Survey Boise, Idaho

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6 Feb 1 – 13 Precipitation as % of Feb Monthly Total Panhandle121% Spokane & Clearwater 74% Salmon & Weiser 82% Payette, Boise Big Wood 93% Little Wood & Big Lost 90% Little Lost & Birch 67% Mud Lake & Henrys Fork 45% Snake abv Palisades 62% Raft & Goose 70% Willow, Blackfoot & Portneuf 49% Bear 55% Salmon Falls & Owyhee 47% Bruneau 22%

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14 Feb 1 Panhandle Snowpack varies with elevation, many snow courses in the lower 10%ile Feb 1 CDA Snow Index (Lookout & Mosquito Ridge) shows the 26.1” which is lowest since 2005 & 5 th lowest since record starts in 1961. 6.6 “ of SWE at Benton Springs Snow Course, 4,920 feet, in Priest River is 5 th lowest since record starts in 1937 (lowest years: 1977 2005 1942 1981 1979 1976 and 2015)

15 SWE as of Feb 13 Clearwater Basin Selway 115% Locsha 96% NF Clearwater 81% Clearwater Basin 85% Salmon abv Salmon 115% Lemhi115% MF Salmon101% SF Salmon 94% Little Salmon 81% Salmon Basin106%

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17 2014 Apr-Jul runoff 14% avg Mud Flat SNOTEL site melted out Feb 10 previous earliest melt-outs: Mar 1, 1981 Mar 8, 1992 Mar 27, 2001 Mar 4, 2014

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19 Idaho Surface Water Supply Index February 1, 2015

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22 Need above 70% of average runoff

23 Need above 100% of average runoff

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25 Soil moisture slides

26 Trinity and the road to Trinity Mountain SNOTEL site Feb 11, 2015 Questions?

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