Wyoming – NRCS

Report #26                              Weekly Snow Report                        May 21, 2018

A good day to everyone! This is the 26th Snow Report for Water Year 2018 (2017-2018 snow season).  Currently the state’s SNOTELs are reading 90% of median with a basin high of 141% and a basin low of 5% (Belle Fourche & Cheyenne are melted out, normal for the date).  Last year at this time the state was at 165%, and at 93% in 2016.  The map may differ slightly from the table depending upon how many stations were reporting at the time. This report and a map displaying basin SWE percentages of median for the state may be found at:  http://www.wrds.uwyo.edu/wrds/nrcs/nrcs.html.  The westwide map is provided for reference.

For information on the use of median vs. average go to http://www.wcc.nrcs.usda.gov/normals/median_average.htm

Figure 1 -- SNOW WATER EQUIVALENT AS PERCENT OF MEDIAN.  The following table shows the percent of median for today, the 2 previous weeks, one year ago, and two years ago for Wyoming basins.  Normal (median) is based on all reporting SNOTEL sites in the basin with calculated medians (newer SNOTEL sites do not have medians figured), but does not include manually measured snow courses.  The statewide SNOTEL percent of median is a percent of median using all SNOTEL sites in Wyoming with calculated medians.  The weighted state average is figured using the area of basins (square miles).  The reference period for computing medians is 1981-2010.

red = down                   blue = up                    green = same       * data is suspect

For more info contact: 

Ken Von Buettner  

kenneth.vonbuettner@wy.usda.gov 

(307) 233-6743  

NRCS Snow Survey

100 East B St., Room 3124 

Casper, WY 82601