>>Water Supply & Measurement
Water Supply
Idaho water supply information is provided through the combined efforts of state and federal governmental agencies involved in water management in Idaho. Each agency brings a different technical aspect and expertise in order to provide the most extensive water supply outlook available.
Technical data sources used by the Water Supply Committee to prepare the comprehensive water supply outlook:
River | Snow | Reservoir Storage | Precipitation & Weather | El Nino | Drought
River
River Flows for Recreationists - flow in cubic feet per second for rivers of local interest
River Flow Information By River
- Real-time data from the USGS website.
River Flow Information by River - Real-time data from Idaho Power's website.
Surface Water Data - USGS
Western U.S. Streamflow Forecast Map - Monthly forecasts provided by the NRCS.
Snow
Idaho Snow Survey - NRCS
National Snow Information - Daily Snowdepth and Snow fall information from the Climate Prediction Center
Northwest SNOTEL Summary - Pacific Northwest Region summary from the USBR
Satellite Snow Cover Maps(By Month) - Satellite Areal Extent of Snow Cover from
NRCS/NWCC
Snow Cover Information (By Location) - Graphic snow parameter for Western US and Columbia Basin from NWS.
Western US SNOTEL Information - Narrative and mapped Snotel climate information from the WRCC
West-wide Snowpack Map - Monthly mountain snowpack maps
Weekly Maps Showing Snow Water Equivalent
Reservoir Storage
Boise and Payette River Systems - Reservoir levels and average daily streamflows from the
USBR.
Pacific Northwest End of Month Reservoir Reports
- Daily and monthly Pacific Northwest water storage reports.
Pacific Northwest System Information - Reservoir Data is under Report List on this page from
USCE.
River Basin Reports - Near real-time Pacific Northwest water and environmental data from the
USBR.
Upper Snake River System - Reservoir levels and average daily streamflows from the USBR.
Precipitation & Weather
Climate Prediction Center
Idaho Annual Average Precipitation - graphical map
Idaho Climate Summaries - clickable map from WRCC
Idaho Evapotranspiration Charts
- crop water use charts - USBR
Idaho Weather Forecasts - NOAA
National 10-Day Precipitation Outlook from the Institute of Global Environment and Society
National 10-Day Temperature Outlook also from IGES
National Long Range Precipitation
& Temperature Outlook - (1 Year By 90-Day Intervals) - WRCC
Northwest Weather Radar Summary - Intellicast summaries
Northwest Precipitation Outlook - done every 6 hours at Intellicast
Western Regional Climate Center
El Nino Information
Basic Facts & Background - How to determine if an El Nino event is occurring today from
NOAA.
Frequently Asked Questions - Commonly asked questions and their answers from the Western Regional Climate Center
Drought Information
Drought Assessment Information - weekly US drought assessment from the Climate Prediction Center of NOAA.
Palmer Drought Index - Color coded map of the United States from NOAA.
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