Streamflow, Drought, and Water Supply Conditions


Water supply conditions as of 5/17/2017

From Jacqueline Knutson, MFWP Hydrology Technician

 

Streamflows

“Streamflows have been well above average for the past two weeks especially in the higher reaches in response to precipitation and warming weather that initiated some runoff from the mountains. Daily flows throughout the basin have consistently been double the daily long-term median flow in the last week.”

Snowpack

“The Big Hole Basin is at 110% of average and the Jefferson Basin is at 95% of average. The snowpack in the upper elevations is slightly higher than last year and has even gained as of today. The mid-elevation snowpack is hanging around despite some warming earlier this month.”

Temperatures

“Valley air temperatures for May have been just below average. The outlook for the rest of May is for gradual warming back to the average.”

 


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

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)