Wow, what swings in average we are having. The Black Hills are melted out. Also, some of the other basins are suspect as there are many sites melted out. These low amounts of SWE at this time of year can change dramatically. Twelve basins gained & one basin is melted out. Last year at this time the state average was 30% with a low of 0% and a high of 48% of average. This year the state average is 132% with a low of 0% and a high of 211% of average. See the table & map below for more information. The map may differ slightly from the table depending upon how many stations were reporting at the time.
For those of you with INTERNET capability, this report and map showing SWE percentages for the state can be found at “http://www.wrds.uwyo.edu/wrds/nrcs/nrcs.html”
Figure 1 -- SNOW WATER EQUIVALENT AS PERCENT OF AVERAGE. The following table shows the current, last year and preceding weeks' % of average snow water equivalent (SWE) amounts for Wyoming basins. Average is based on all reporting SNOTEL sites in the basin, not the snow courses. The reference period for average comparison is 1971-2000.
|
DRAINAGE BASIN |
5/26/2008 |
5/19/2008 |
5/12/2008 |
5/26/2007 |
5/19/2007 |
|
|
SNAKE RIVER |
134 |
120 |
125 |
15 |
15 |
|
|
UPPER YELLOWSTONE |
151 |
132 |
132 |
36 |
35 |
|
|
WIND RIVER |
128 |
93 |
97 |
20 |
23 |
|
|
BIGHORN BASIN |
138 |
103 |
108 |
38 |
36 |
|
|
SHOSHONE |
124 |
97 |
104 |
23 |
25 |
|
|
POWDER - TONGUE |
211 |
136 |
134 |
48 |
53 |
|
|
BELLE FOURCHE |
* |
0 |
424 |
* |
0 |
|
|
UPPER NORTH PLATTE |
124 |
123 |
117 |
43 |
42 |
|
|
LOWER N PLATTE,SWT |
133 |
112 |
107 |
37 |
45 |
|
|
LITTLE SNAKE RIVER |
154 |
137 |
124 |
33 |
35 |
|
|
UPPER GREEN RIVER |
97 |
78 |
98 |
18 |
19 |
|
|
LOWER GREEN RIVER |
126 |
91 |
103 |
23 |
27 |
|
|
UPPER BEAR RIVER |
102 |
89 |
108 |
0 |
0 |
|
|
Weighted State Average |
132 |
104 |
130 |
30 |
32 |
|
* red = down * blue = up * green = even
For more information, contact:
Lee Hackleman or Terry Gonzales (307) 233-6744, 6743
NRCS Snow Surveys
100 East B St., Room 3124
Casper, WY