Monday, March 11, 2013

Latest Water Supply Outlook

The Riverton Forecast Office has issued the latest update for this Springs runoff and water supply.  Hopefully this will be a wet Spring!


Wyoming Water Supply Outlook---issued March 11

...February basin precipitation was 85 to 90 percent of average across Wyoming…
…Mountain snowpack across Wyoming continues to be around 80 to 85 percent of average... 
Below normal streamflow volumes expected across a majority of Wyoming’s watersheds...
…Wyoming reservoir storages continue to be near average for early March…
February precipitation across Wyoming was 85 to 90 percent of average. Precipitation numbers varied between 153 percent of normal over the Tongue Basin to 49 percent of normal over the Upper Green Drainage.
Mountain snowpack across Wyoming continued to be around 80 to 85 percent of normal by early March.  Snowpack "water" numbers and/or SWEs were the highest across northern Wyoming—varying between 85 to 95 percent of normal.  SWEs were the lowest across southern Wyoming---varying from 65 to 80 percent of normal.
Streamflow snowmelt volumes are expected to be below normal across a majority of basins across Wyoming.  Near normal (91 to 99 percent) streamflow volumes are expected across portions of the Powder, Big Horn, and Shoshone Watersheds
Well below normal (50 to 75 percent) spring and early summer snowmelt volumes are expected for a majority of watersheds across southern Wyoming.
Reservoirs storages across Wyoming are near average for early March.
The latest Wyoming water supply outlook graphic:

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