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Jan 1-9 SNOTEL Precipitation ranges from <10% in the Little Wood & Big Lost to 25% in northern Idaho and Oakley basin.

Published byShon Eugene O’Brien’ Modified over 9 years ago

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Presentation on theme: "Jan 1-9 SNOTEL Precipitation ranges from <10% in the Little Wood & Big Lost to 25% in northern Idaho and Oakley basin."— Presentation transcript:

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6 Jan 1-9 SNOTEL Precipitation ranges from <10% in the Little Wood & Big Lost to 25% in northern Idaho and Oakley basin

7 PRISM Maps Maps were produced by Oregon State University's PRISM Climate Group. Data and website development are funded by USDA Risk Management Agency (RMA) for crop insurance verification, and quality control of SNOTEL data is funded by NRCS. The maps include all SNOTEL stations and many other national and regional networks. Maps are http://www.prism.oregonstate.edu/http://www.prism.oregonstate.edu/

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12 4 out of 52 years, ~8% chance to return to March- April normals Boise Basin: Of the lowest 12 years: 1963, 1998, 2000, 2010 & 1968 had a cool PDO signal like 2014. Neutral years include: 1990, 1987,1963, 1979, 1991, 2000 & 1968 like 2014. Weather is more variable today than historically, and UofI analysis shows storms are bigger, so just takes a few storms to get us back in the game for 2 nd of winter. ?

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16 IDAHO RESERVOIR STORAGE Usable Contents Reservoir (s) Percent of Capacity December 31, 2013 Percent of Average December 31, 2013 Salmon Falls629 Owyhee819 Coeur d' Alene1539 Oakley1765 Magic2060 Palisades & Jackson2647 Little Wood3371 Blackfoot4286 Boise (3)4283 American Falls4274 Mackay4286 Bear Lake4693 Payette (2)5970 Dworshak6696

17 IDAHO SURFACE WATER SUPPLY INDEX (SWSI)January 1, 2014

18 Water Supply Forecasts, Amount Needed & Exeedance Forecasts BASIN or REGION Adequate Irrigation Water Supply (KAF) Projected March 31 Reservoir Storage (KAF) Streamflow Volume Needed for Adequate Water Supply (KAF) (% of Ave.) 90% Chance of Exceedance Streamflow Forecast Apr- Sep (KAF) 70% Chance of Exceedance Streamflow Forecast Apr- Sep (KAF) 50% Chance of Exceedance Streamflow Forecast Apr- Sep (KAF) 30% Chance of Exceedance Streamflow Forecast Apr- Sep (KAF) 10% Chance of Exceedance Streamflow Forecast Apr- Sep (KAF) Big Wood27540235 (89%) 7 (-228)18 -(217) 82 (-153)160 (-75)265 (+30) Salmon Falls1102090 (122%) 14 (-76)28 (-62) 40 (-50)54 (-36)79 (-11) Oakley502030 (115%) 1 (-29)11 (-19) 18 (-12)25 (-5)35 (+5) Big Lost18030150 (100%) 7 (-143)58 (-92) 93 (-57)128 (-22)179 (+29) Little Lost40040 (119%) 14 (-26)21 (-19) 26 (-14)32 (-8)42 (+2) Boise1,5004801020 (75%) 205 (-815)625 (-395) 815 (-205)1010 (-10)1420 (+400) Snake (Heise)4,4006843516 (93%) 2440 (-1076)2980 (-536) 3350 (-166)3720 (+204)4260 (+744) Little Wood601842 (51%) 7 (-35)17 (-25) 42 (+ -0)65 (+23)100 (+58) Owyhee45075375 (93%) 145 (-230)285 (-90) 405 (+30)545 (+170)795 (+420) Teton85085 (44%) 88 (+3)125 (+40) 154 (+69)186 (+101)240 (+155) Bear River4006700 3 (+3)108 (+108) 160 (+160)252 (+252)357 (+357)

19 November 26, 2013 Grand Teton National Park Questions / Comments / Corrections

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