Greetings from Silverton,
Site visits to CODOS study plots at Grand Mesa on June 7, Swamp Angel Study Plot (SASP) on June 9, and Wolf Creek on June 10, revealed snow-all-gone (SAG) at all locations. As the photos shown below illustrate, snow is either totally gone (Wolf Cr.) or exists only in thin, patchy areas. Snow is mostly present in heavily treed areas and higher elevations, and predominately on northerly aspects. All dust layers are merged at the surface of the snow. Just like the other CODOS sites with dust, an “all-layers-merged” (ALM) sample was collected at each of these locations and sent to our USGS collaborators for chemical analyses for inter-site comparison.
May was cooler than normal state-wide. Here at Senator Beck Basin (SBB), SASP, and even more so Senator Beck Study Plot (SBSP) located at 12,180’, saw a boost in precipitation from three storms the first half of May along with an overall period of slowed snowmelt. The last 10 days of May, after precipitation events ceased (besides a brief precipitation event on May 26 effectively creating an “albedo reset”), the snowpack began melting rapidly with increasing rising minimum and maximum temperatures. Nighttime minimum air temperatures began to stay above 0° C on June 2.
In response, stream discharge starting the end of May surged to a record peak at the SBB gauge. The gauge reached 20 cfs on June 5. The water year with the next highest daily peak is WY2010 at 18 cfs. Similarly, stream gauges around the state are showing the same jump in streamflow. Please see plots below.
Swamp Angel Study Plot