Beaverhead Water Users Meeting Current Conditions and Snow Survey - - PowerPoint PPT Presentation

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Beaverhead Water Users Meeting Current Conditions and Snow Survey - - PowerPoint PPT Presentation

Beaverhead Water Users Meeting Current Conditions and Snow Survey Update January 25 th , 2016 Lucas Zukiewicz Water Supply Specialist USDA NRCS Montana Snow Surveys Lucas.Zukiewicz@mt.usda.gov Photo: Slagamelt Lake (406) 587-6843 in the


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Lucas Zukiewicz Water Supply Specialist USDA NRCS Montana Snow Surveys Lucas.Zukiewicz@mt.usda.gov (406) 587-6843 http://www.nrcs.usda.gov/wps/portal/nrcs/main/mt/snow/

Beaverhead Water Users Meeting

Current Conditions and Snow Survey Update January 25th, 2016

Photo: Slagamelt Lake in the Beaverhead

  • Range. Photo: Lucas Z.
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Current Conditions

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Conditions Ending Water Year 2015

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Water Year Precipitation as

  • f Jan 1st, 2016
  • Valleys are well above

average for the period

  • Mountain SNOTEL sites

are average to above average.

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Reservoir Storage as of Jan 1st, 2016

  • Lima – 73% Average
  • Clark Canyon – 72 %

Average

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Current Snowpack Conditions

Snowpack is near or above normal across the basin SNOTEL sites Headwaters of Beaverhead River are 95-120% Snowpack only slightly below normal near Red Rocks

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Water Year-To-Date Precipitation

October 1st, 2015 - Present

Precipitation is near

  • r above average at

mountain SNOTEL sites across the basin SNOTEL sites Headwaters of Beaverhead River are 94 -105%

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Streamflow Forecasts

Streamflow forecasts are presented as a range of

  • utcomes.

90% Exceedance (Chance)

  • likely to occur if dry

70% Exceedance (Chance

  • probable to occur if dry

50% Exceedance (Chance)

  • equal chances of occurring

30% Exceedance (Chance)

  • probable to occur if wet

10% Exceedance (Chance)

  • possible to occur if wet
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Streamflow Forecasts

Streamflow forecasts are presented as a range of

  • utcomes.

Lima Inflow April-September: 90% - 48% Average Flow 70% - 75% Average Flow 50% - 94% Average Flow 30% - 113% Average Flow 10% - 140% Average Flow In general, as we approach peak accumulation the range

  • f values decreases in

basins where snowmelt is the dominant driver of river flows.

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Accessing the Information

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Montana Snow Survey Homepage

http://www.nrcs.usda.gov/wps/portal/nrcs/main/mt/snow/

Google – Montana Snow Survey

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NEW! Water Supply Outlook Report

Our staff has rebuilt the report which now includes more graphical information on current conditions Issued Monthly from Jan 1st – June 1st. Summarizes:

  • Snowpack
  • Precipitation
  • Reservoir Storage
  • Streamflow Forecasts

Includes:

  • State-wide Maps
  • Basin Specific Maps
  • Basin Data Tables
  • Basin Trend Graphs
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Interactive Map

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New Installations (?)

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Proposed Snowcourse Conversions

Snowcourse conversions requested to the USFS Beaverhead-Deerlodge

  • Notch Snowcourse

(Beaverhead)

  • Dad Creek Lake SC

(Beaverhead)

  • Abundance Lake SC

(Big Hole)

  • Foolhen SC

(Big Hole)

  • Slagamelt Lake SC

(Big Hole)

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Lucas Zukiewicz Water Supply Specialist USDA NRCS Montana Snow Surveys Lucas.Zukiewicz@mt.usda.gov (406) 587-6843 http://www.nrcs.usda.gov/wps/portal/nrcs/main/mt/snow/

Beaverhead Water Users Meeting

Current Conditions and Snow Survey Update January 25th, 2016