Streamflow, Drought, and Water Supply Conditions
Water supply conditions
From The montana water supply outlook report
June 1, 2019
Jefferson Basin: “May yielded variable precipitation to the Jefferson Drainage as the Ruby received just a third of its average while the Big Hole, Beaverhead, and Boulder were only slightly below normal. The good news is water year to date numbers are spot on at 101% of average and snowpack in the Ruby is 128% of normal while the basin-wide average is near normal. Reservoir storage is up to 119% of average as water managers are trying to hold back as much as they can with an average snowpack above them in the mountains. Water supplies are looking sufficient for now, but keep in mind that we still need to receive normal amounts of precipitation from June to August to avoid water shortages towards the end of the irrigation season.”
Big Hole Sub-basin Snowpack: 101% of normal (1981-2010 median)
About the Montana Water Supply Outlook Report: The Montana NRCS Snow Survey Program provides mountain snowpack and precipitation information via the SNOwpack TELemetry (SNOTEL) network in order to issue streamflow forecasts for Montana and Wyoming. Common applications of snow survey products include water supply management, flood control, climate modeling, recreation, and conservation planning. The Snow Survey Program issues the Montana Water Supply Outlook Report on the 5th business day of each month. (January 1 – June 1).
Period of Record Monthly Climate Summary – Period of Record : 01/01/1923 to 06/09/2016
See details below from Western Regional Climate Center:
WISDOM, MONTANA (249067)
|Average Max. Temperature (F)||26.4||31.1||38.5||49.2||60.3||68.6||79.4||77.8||67.6||55.0||38.0||28.0||51.7|
|Average Min. Temperature (F)||1.2||3.3||10.8||21.2||28.7||36.1||38.2||34.7||27.8||21.3||12.3||3.6||19.9|
|Average Total Precipitation (in.)||0.70||0.52||0.74||0.95||1.64||1.96||1.09||1.03||0.99||0.83||0.76||0.77||11.97|
|Average Total SnowFall (in.)||11.8||8.3||8.6||4.5||2.5||0.5||0.0||0.0||0.5||1.9||7.8||10.8||57.0|
|Average Snow Depth (in.)||9||10||8||1||0||0||0||0||0||0||2||5||3|
Percent of possible observations for period of record.
Max. Temp.: 98.7% Min. Temp.: 98.6% Precipitation: 98.6% Snowfall: 76.4% Snow Depth: 50.3%
National Water Supply Reports
Nation-wide information for water supply and climate prediction & forecasts.
Montana Water Supply Reports & resources
Statewide information for water supply and drought conditions. Report breaks out conditions by major basins:
Water supply and drought condition information specific to the Upper Missouri Basin:
Water Monitoring Resources from the Montana Watershed Coordination Council
Past Streamflow & Snowpack Reports