Water Supply & Reservoir Storage

Water Supply Outlook Report (WSOR)                   Drought and Surface Water Supply Index (SWSI)

Streamflow Forecasts                                               Reservoir Storage

Monthly Snowpack and Streamflow Maps             Peak Streamflow for Individual Basins

Water Supply Presentations                                    More Info about Water Supply Forecast Products

Fall 2007 - Snow Survey and Water Supply News - Updated 10/31/07

 

• Idaho and ALL Western States WSOR  (current & historic reports available - HTML and text versions)
• Idaho WSOR Hardcopy by Mail - To receive the Jan - May issues by mail please call the Idaho Snow Survey at 208-378-5740.
• Idaho WSOR in Adobe PDF format

  The following documents require Adobe Acrobat.
  Select WSOR by Month and Year    Jan 2008 (555 KB) Feb 2008 (495 KB) Mar 2008 (600 KB) Apr 2008 (524 KB) May 2008 (294 KB) Jun 2008 Jan 2007 (316 KB) Feb 2007 (185 KB) Mar 2007 (325 KB) Apr 2007 (247 KB) May 2007 (353 KB) Jun 2007 (311 KB) Jan 2006 (203 KB) Feb 2006 (304 KB) Mar 2006 (264 KB) Apr 2006 (506 KB) May 2006 (596 KB) Jun 2006 (360 KB) Jan 2005 (217 KB) Feb 2005 (190 KB) Mar 2005 (287 KB) Apr 2005 (223 KB) May 2005 (431 KB) Jun 2005 (427 KB) Jan 2004 (228 KB) Feb 2004 (331 KB) Mar 2004 (544 KB) Apr 2004 (295 KB) May 2004 (182 KB) Jun 2004 (182 KB) Jan 2003 (1.6 MB) Feb 2003 (356 KB) Mar 2003 (652 KB) Apr 2003 (498 KB) May 2003 (389 KB) Jun 2003 (591 KB) Jan 2002 (1.2 MB) Feb 2002 (1.7 MB) Mar 2002 (372 KB) Apr 2002 (612 KB) May 2002 (782 KB) Jun 2002 (421 KB)
  Idaho WSOR Streamflow Adjustments and Reservoir Capacity Definitions (167 KB)

Drought and Surface Water Supply Index (SWSI)

Streamflow Forecasts

• Quick Glance Idaho Streamflow Forecasts (current year)
  • January 1 | February 1 | March 1 | April 1 | May 1 | June 1
  
  
  • January 15 | February 15 | March 15 | April 15 | May 15 |

• Daily Guidance Streamflow Forecasts Using SNOTEL Data - New Format

  Disclaimer:  The Daily Seasonal Water Supply Forecast Guidance Product is a completely automated product based on SNOTEL data.  This product is not meant to replace or supersede the official forecasts produced in coordination with the National Weather Service.

• Western US Streamflow Forecast Tables
• Streamflow Forecast Probability Charts  (For selected stations in each state)

• Guide to Interpreting Streamflow Forecasts

• 2008 Water Year Monthly Streamflow Totals for Idaho and Surrounding States
• Idaho | Montana | Wyoming | Nevada | Oregon | Washington
• 2007 Water Year Monthly Streamflow Totals for Idaho and Surrounding States
• Idaho | Montana | Wyoming | Nevada | Oregon | Washington

• Current Idaho Reservoir Storage Graphic
• Current Western US Reservoir Storage Graphic
• Historic Western US Reservoir Storage Graphics
• Monthly Reservoir Reports  (Format types: BARE, BARS)


• 2008 Water Year End of Month Reservoir Storage Totals for Idaho and Surrounding States
• Idaho | Montana | Wyoming | Nevada | Oregon | Washington


• 2007 Water Year End of Month Reservoir Storage Totals for Idaho and Surrounding States
• Idaho | Montana | Wyoming | Nevada | Oregon | Washington

• Idaho Reservoir Capacity Definitions and Streamflow Adjustments (as published in WSOR)

  The following document requires Adobe Acrobat.
  
  Idaho Streamflow Adjustments and Reservoir Capacity Definitions (34KB)



• Links to Some Idaho Reservoir Levels Provided by Other Agencies

• Idaho First of Month Snowpack Maps

  Jan

  Feb

  Mar

  Apr

  May

  Jun

• Idaho First of Month Streamflow Forecast Maps

  Jan

  Feb

  Mar

  Apr

  May

  Jun

• Western US Streamflow Forecast Maps  

The following document requires Adobe Acrobat.

How NRCS Snow Survey Data and Products are Used (Dec. 2006) (883 KB)
Uses of NRCS Snow Survey Data and Products (April 2007) (871 KB)
Powerpoint presentation of Uses of NRCS Snow Survey Data and Products (April 2007) (5 MB)

Last Modified: 05/07/2008