Monthly Water Supply Outlook Reports (WSOR) are available by the fifth business day of each month, January through June. The report summarizes current conditions related to water supply across Montana, including precipitation, snowpack, temperature, streamflow, drought status, and weather outlooks. It also contains the most recent water supply forecasts for the upcoming spring and summer season.
See the up-to-date, most recent data here. Thank you to USDA NRCS for this resource!