Wyoming Water Supply Outlook---updated May 17th, 2011

Well above normal spring and summer runoff volumes are still expected for the Upper and Lower North Platte, the Little Snake, the Laramie, the Upper Bear, and portions of the Upper Yellowstone and Snake Drainages…

...Above normal spring and summer runoff volumes are forecasted for the rest of Wyoming's major watersheds...

Mountain snowpack (as of early May) Wyoming continues to be well above normal at 130 - 155 percent of average. Snowpack "water" numbers and/or snow water equivalent (SWEs) figures at the beginning of May continued to be the highest across southern Wyoming--with 150 to 200 percent of normal.  SWEs across the rest of Wyoming varied from 115 to 140 percent of normal.

Above to well above normal (> 120 percent) snowmelt streamflow volumes are expected across the almost every major drainage basin across Wyoming.   

The Upper and Lower North Platte (including the Laramie) Basins are expected to see well above average streamflow volumes (150 to 220 percent of normal) during the spring and summer runoff. 

The latest Wyoming water supply outlook graphic:

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