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Idaho Drought and Surface Water Supply Index (SWSI)

SWSI: Background Information Monthly Tables

Adequate Surface Irrigation Requirement Outlook

Drought and Water Supply Related Links

Individual Basin Products - SWSI Tables and Graphs

Panhandle Region Wood and Lost River Basins

Clearwater River Basin Upper Snake River Basins

Salmon River Basin Southside Snake River Basins - including new Owyhee products

Weiser, Payette, Boise River Basins Bear River Basin

SWSI Background Information

Monthly SWSI Tables

Some of the following documents require Adobe Acrobat.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep

Adequate Surface Irrigation Requirement Outlook

The following documents require Adobe Acrobat.

2012 Snowpack & Streamflow Needed for Adequate Irrigation Supply as of 11/14/2011 (26KB)
2011 Snowpack & Streamflow Needed for Adequate Irrigation Supply as of 11/15/2010 (65KB)

Drought and Water Supply Related Links

US Drought Monitor - Map of Current Drought Status -Updated weekly
NRCS Snowpack/Drought Monitor Weekly Update Reports -Updated weekly
US Seasonal Drought Outlook - Map -Updated monthly

Individual Basin Products - SWSI Tables and Graphs

Panhandle Region

Northern Panhandle Region

SWSI Tables require Adobe Acrobat. Adobe Acrobat

Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep

Graphs - Streamflow - 1971 to present, and Historic

Jan Feb Mar Apr May Jun Jul Aug Sep
Spokane River Basin
- Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat. Adobe Acrobat
- Graphs - Reservoir and Streamflow - 1971 to present, and Historic

Clearwater River Basin

Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly
SWSI Tables require Adobe Acrobat.

Graphs - Reservoir and Streamflow - 1971 to present, and Historic

Dworshak Reservoir Inflow Forecast Graphs, 2002 - Present
Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total

Salmon River Basin

Monthly Graph of Snow and Streamflow for Recent Years -Updated monthly

SWSI Tables require Adobe Acrobat.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep

Graphs - Streamflow - 1971 to present, and Historic

Jan Feb Mar Apr May Jun Jul Aug Sep

Streamflow Forecast Graphs, 2002 - Present
Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total

1yr 2yr 3yr 4yr 6yr 8yr 10yr

Moose Creek Precipitation Monthly

Mill Creek Summit Precipitaton Monthly

Weiser, Payette, Boise River Basins

Weiser River Basin

Monthly Graph of Snow and Streamflow for Recent Years -Updated monthly

SWSI Tables require Adobe Acrobat.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep

Graphs - Streamflow - 1971 to present, and Historic

Jan Feb Mar Apr May Jun Jul Aug Sep

Streamflow Forecast Graphs, 2002 - Present
Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total

1yr 2yr 3yr 4yr 6yr 8yr 10yr
Payette River Basin
- Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat.
  
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep
- Graphs - Reservoir and Streamflow - 1971 to present, and Historic
- Streamflow Forecast Graphs, 2002 - Present
- Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total
- Deadwood Summit Precipitation Monthly Annual Departure
Boise River Basin
- Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat.
  
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep 2013 Amount Needed
- Graphs - Reservoir and Streamflow - 1971 to present, and Historic
- Streamflow Forecast Graphs, 2002 - Present
- Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total
- Prairie Precipitation Monthly
- Trinity Mountain Precipitation Monthly

Wood and Lost River Basins

Big Wood River Basin

Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly

SWSI Tables require Adobe Acrobat.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep 2013 Amount Needed

Graphs - Reservoir and Streamflow - 1971 to present, and Historic

Jan Feb Mar Apr May Jun Jul Aug Sep

Streamflow Forecast Graph, 2002 - Present
Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total

1yr 2yr 3yr 4yr 6yr 8yr 10yr

Hyndman Precipitation Monthly
Little Wood River Basin
- Monthly Graph of Snow and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat.
  
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep 2012 Amount Needed
- Graphs - Streamflow - 1971 to present, and Historic
- Streamflow Forecast Graphs, 2002 - Present
- Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total
Big Lost River Basin
- Monthly Graph of Snow, Reservoir and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep 2013 Amount Needed
- Graphs - Reservoir and Streamflow - 1971 to present, and Historic
- Streamflow Forecast Graphs, 2002 - Present
- Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total
Little Lost River Basin
- Monthly Graph of Snow and Streamflow for Recent Years -Updated monthly
- SWSI Tables require Adobe Acrobat.
  
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct-Sep 2012 Amount Needed
- Graphs - Streamflow - 1971 to present, and Historic
- Streamflow Forecast Graphs, 2002 - Present
- Annual Streamflow - Historic Data - 1, 2, 3, 4, 6, 8, 10 Year Total
- Moonshine Precipitation Monthly