Streamflow, Drought, and Water Supply Conditions


Water supply conditions as of 11/15/2017

From Jacqueline Knutson, Hydrology Technician, Montana Fish, Wildlife and Parks

Snowpack: Winter came quickly this year and has given our snowpack a very strong start. October and early November snowfall has put the Jefferson basin at 191% of normal and the Big Hole Basin at 216% of normal for the water year which began on October 1st. These percentages can change quickly this early in the water year but so far things bode well for a good winter and solid snow totals for runoff if snow continues to accumulate this way as winter progresses. This time last year things were looking pretty abysmal with a very slow start to the snowpack as precipitation was coming in as rain; this is certainly not the case this year.


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)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
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. 

National Climate Center Three Month Outlook Report – December 2017-February 2017

 


Montana Water Supply Reports

Statewide information for water supply and drought conditions. Report breaks out conditions by major basins:

Montana Water Supply Outlook Reports (by Basin)

Guide to Using the New Montana Water Supply Report

Water supply and drought condition information specific to the Upper Missouri Basin:

Upper Missouri River Basin Water Supply Report: Spring 2017

 


Past Streamflow & Snowpack Reports

November 2017 Streamflow/Snowpack Report (PDF)

October 2017 Streamflow/Snowpack Report (PDF)

August 2017 Streamflow/Snowpack Report (PDF)

June 2017 Streamflow/Snowpack Report (PDF)

April 2017 Streamflow/Snowpack Report (PDF)

March 2017 Snowpack Report (PDF)

February 2017 Snowpack Report (PDF)

November 2016 Streamflow/Snowpack Report (PDF)

September 2016 Streamflow/Snowpack Report (PDF)

May 2016 Streamflow/Snowpack Report (PDF)

April 2016 Streamflow/Snowpack Report (PDF)

March 2016 Streamflow/Snowpack/CCAA Report (PDF)

February 2016 Streamflow/Snowpack Report (PDF)