Observation: Abnormally low water levels have been observed in Nome area rivers due to low snow fall and low precipitation. These include the Nome River, Snake River, Penny River, and Grand Central River. The reduced water depth could cause elevated water temperatures and may also result in some areas that are more difficult for migrating salmon to negotiate. Water temperatures in some reaches and upper tributaries have been elevated at times during the summer due to low water and exceptionally sunny, warm weather. Water temperature at this location was recorded at 13.8 C (57° F) on July 28th, which is above state standards for salmon spawning areas or for eggs & fry incubation. Here are the State of Alaska standards: migration routes 15 degrees C (59° F) / spawning areas 13 degrees C (55° F) / rearing areas 15 degrees C (59° F) / egg & fry incubation 13 degrees C (55° F). Here is a link to a gauge on the Snake River. It appears to be the only one near Nome, and it doesn’t list any low-water events (only high water crests from back in mid-90’s). Adding gauges to other significant area rivers would help identify trends in stream flow and discharge. Mike Sloan and Jacob Martin
Consult: This observation was shared with David Strubel of the NOAA River Forecast Center, Scott Kent, a fisheries biologist with the Alaska Department of Fish and Game, and Ed Washburn, Multimedia Team Leader for the U.S. Environmental Protection Agency.
