Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of SUNDAY: MAY 18 , 1997
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 12.1 4.0 302 39.1 26.7 146
COTTONWOOD CREEK 7600 19.1 11.5 166 40.0 29.8 134
GRANITE CREEK 6770 15.2 6.3 241 35.8 28.4 126
GRASSY LAKE 7265 31.4 24.5 128 61.8 44.3 140
GROS VENTRE SUMMIT 8775 15.2 8.3 183 23.4 19.2 122
LEWIS LAKE DIVIDE 7860 43.0 27.9 154 64.5 45.1 143
PHILLIPS BENCH 8200 35.0 23.9 146 51.2 35.5 144
SALT RIVER SUMMIT 7600 4.9 .0 * 27.1 20.4 133
SNAKE RIVER STATION 6920 -M 9.5 * -M 31.1 *
SPRING CREEK DIVIDE 9000 29.1 24.8 117 37.6 32.4 116
THUMB DIVIDE 7980 15.9 9.2 173 37.9 25.0 152
TOGWOTEE PASS 9580 29.4 25.6 115 40.2 33.8 119
TWO OCEAN PLATEAU 9360 43.4 25.6 170 -M 36.7 *
WILLOW CREEK 8450 32.6 26.3 124 53.8 38.3 140
----- -----
Basin wide percent of average 147 135
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 23.9 * 35.5 23.3 152
BLACK BEAR 7950 -M 35.3 * -M 48.7 *
CANYON 7940 11.3 5.6 202 29.9 17.7 169
FISHER CREEK 9100 -M 36.4 * -M 44.8 *
MADISON PLATEAU 7750 28.5 16.9 169 46.5 31.8 146
NORTHEAST ENTRANCE 7350 1.2 2.2 55 23.5 15.3 154
PARKER PEAK 9400 31.9 22.0 145 -M 20.0 *
SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153
THUMB DIVIDE 7980 15.9 9.2 173 37.9 25.0 152
TWO OCEAN PLATEAU 9360 43.4 25.6 170 -M 36.7 *
WHISKEY CREEK 6800 13.5 8.0 169 35.5 26.4 134
WHITE MILL 8700 36.9 23.9 154 -M 34.8 *
WOLVERINE 7650 -M 2.5 * 19.0 16.8 113
----- -----
Basin wide percent of average 161 147
WIND RIVER
BURROUGHS CREEK 8750 16.1 6.0 268 29.3 21.1 139
CHRISTINA LAKE 9980 17.8 15.8 113 27.9 22.0 127
COLD SPRINGS 9630 -M 2.4 * 16.9 14.7 115
HOBBS PARK 10100 18.6 15.6 119 19.7 19.3 102
LITTLE WARM 9620 8.6 4.6 187 25.7 17.9 144
SOUTH PASS 9040 18.7 15.4 121 30.2 22.5 134
ST. LAWRENCE ALT 8620 -M 2.0 * 16.4 13.8 119
TOGWOTEE PASS 9580 29.4 25.6 115 40.2 33.8 119
TOWNSEND CREEK 8700 3.3 5.3 62 18.4 17.2 107
----- -----
Basin wide percent of average 127 123
BIGHORN BASIN
BALD MTN. 9375 21.9 23.4 94 23.0 23.3 99
BEAR TRAP MEADOW 7900 .1 1.2 8 13.3 12.4 107
BLACKWATER 9780 38.7 23.7 163 34.5 22.5 153
BONE SPRINGS DIV 9350 19.0 15.1 126 21.5 20.3 106
EVENING STAR 9200 -M 29.5 * 46.9 28.1 167
GRAVE SPRINGS 8550 4.7 -M * 14.8 14.5 102
KIRWIN 9550 10.1 9.2 110 20.5 14.9 138
LOST CREEK 8080 16.4 12.2 134 20.6 17.1 120
MARQUETTE 8760 8.5 7.0 121 16.4 15.6 105
MIDDLE POWDER 7760 10.6 12.0 88 19.0 16.7 114
OWL CREEK 8975 .2 .8 25 9.6 9.5 101
POWDER RIVER PASS 9480 11.3 5.3 213 18.4 16.6 111
SHELL CREEK 9580 -M 16.0 * 19.7 18.0 109
SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153
SYLVAN ROAD 8120 2.1 3.5 60 30.7 20.4 150
TIMBER CREEK 7950 .1 2.1 5 11.5 12.1 95
YOUNTS PEAK 8350 20.4 14.6 140 -M 20.9 *
----- -----
Basin wide percent of average 123 125
SHOSHONE RIVER
BLACKWATER 9780 38.7 23.7 163 34.5 22.5 153
EVENING STAR 9200 -M 29.5 * 46.9 28.1 167
KIRWIN 9550 10.1 9.2 110 20.5 14.9 138
MARQUETTE 8760 8.5 7.0 121 16.4 15.6 105
SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153
SYLVAN ROAD 8120 2.1 3.5 60 30.7 20.4 150
YOUNTS PEAK 8350 20.4 14.6 140 -M 20.9 *
----- -----
Basin wide percent of average 138 148
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .1 1.2 8 13.3 12.4 107
BONE SPRINGS DIV 9350 19.0 15.1 126 21.5 20.3 106
BURGESS JUNCTION 7880 11.1 9.5 117 18.1 16.2 112
CLOUD PEAK RESERVOIR 9860 17.8 14.7 121 20.9 19.4 108
DOME LAKE 8880 9.6 9.2 104 19.9 18.5 108
GRAVE SPRINGS 8550 4.7 -M * 14.8 14.5 102
HANSEN SAWMILL 8760 .0 3.4 0 12.2 11.8 103
LOST CREEK 8080 16.4 12.2 134 20.6 17.1 120
MIDDLE POWDER 7760 10.6 12.0 88 19.0 16.7 114
POWDER RIVER PASS 9480 11.3 5.3 213 18.4 16.6 111
SUCKER CREEK 8880 13.9 9.4 148 22.1 18.7 118
TIE CREEK 6870 .2 -M * 18.0 15.6 115
----- -----
Basin wide percent of average 119 111
BELLE FOURCHE
BLIND PARK 6890 .0 3.8 0 20.0 16.2 123
NORTH RAPID CREEK 6130 .1 -M * 18.7 -M *
WARREN PEAK 6520 7.9 3.8 208 -M 11.9 *
----- -----
Basin wide percent of average 104 123*
UPPER N. PLATTE RIVER
COLUMBINE 9400 12.1 12.1 100 38.7 29.6 131
DIVIDE PEAK 8800 12.9 10.8 119 29.6 29.2 101
ELK RIVER 8700 9.9 7.0 141 31.4 23.4 134
JOE WRIGHT 10120 29.4 22.5 131 37.9 32.8 116
NORTH FRENCH CREEK 10100 32.9 25.6 129 36.6 30.4 120
OLD BATTLE 10000 43.9 34.6 127 46.7 37.8 124
SOUTH BRUSH CREEK 8400 .0 5.0 0 21.9 22.1 99
TOWER 10500 60.5 49.7 122 59.8 46.6 128
WEBBER SPRINGS 9200 22.9 18.7 122 42.6 32.3 132
WILLOW CREEK PASS 9540 17.6 9.2 191 20.7 17.0 122
----- -----
Basin wide percent of average 124 121
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 29.0 22.8 127 35.0 25.6 137
CASPER MTN. 7900 15.1 9.8 154 27.5 21.0 131
CHRISTINA LAKE 9980 17.8 15.8 113 27.9 22.0 127
DEADMAN HILL 10220 18.6 17.1 109 24.8 23.0 108
LAPRELE CREEK 8320 .0 3.0 0 18.6 16.6 112
RENO HILL 8400 14.7 7.6 193 26.8 23.4 115
ROACH 9700 19.0 14.5 131 28.2 28.2 100
SAND LAKE 10080 42.6 33.5 127 36.9 26.8 138
SOUTH PASS 9040 18.7 15.4 121 30.2 22.5 134
WINDY PEAK 7840 .2 2.9 7 14.3 14.1 101
----- -----
Basin wide percent of average 123 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .3 .0 * -M 19.8 *
DIVIDE PEAK 8800 12.9 10.8 119 29.6 29.2 101
OLD BATTLE 10000 43.9 34.6 127 46.7 37.8 124
SANDSTONE RS 8150 .0 1.9 0 26.3 24.6 107
WHISKEY PARK 8950 34.0 23.0 148 41.2 36.4 113
----- -----
Basin wide percent of average 129 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 5.4 8.1 67 19.8 19.7 101
BLIND BULL SUM 8650 46.3 21.3 217 37.2 28.3 131
EAST RIM DIVIDE 7930 8.3 11.7 71 18.9 18.3 103
ELKHART PARK G.S. 9400 9.6 8.8 109 21.3 19.3 110
GROS VENTRE SUMMIT 8775 15.2 8.3 183 23.4 19.2 122
KENDALL R.S. 7740 6.2 .0 * 25.3 18.8 135
LOOMIS PARK 8240 -M 9.3 * 30.1 22.7 133
NEW FORK LAKE 8340 .3 5.1 6 16.2 17.4 93
SNIDER BASIN 8250 7.5 7.0 107 21.8 18.3 119
SPRING CREEK DIVIDE 9000 29.1 24.8 117 37.6 32.4 116
TRIPLE PEAK 8500 22.1 20.1 110 44.2 37.1 119
----- -----
Basin wide percent of average 125 118
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 19.1 16.1 119
HEWINTA 9500 .0 .0 100* 17.2 17.8 97
HICKERSON PARK 9150 .0 .5 0* 12.5 13.9 90
HOLE-IN-ROCK 9150 .1 .4 25* 12.9 13.9 93
INDIAN CREEK 9425 32.1 23.6 136 37.1 30.9 120
KELLEY R.S. 8180 9.3 8.2 113 35.3 22.7 156
STEEL CREEK PARK 10100 14.7 15.8 93 19.9 18.1 110
----- -----
Basin wide percent of average 116* 115
UPPER BEAR RIVER
BUG LAKE 7950 19.7 8.7 226 34.4 23.9 144
HAYDEN FORK 9400 .7 .6 117* 30.1 24.8 121
KELLEY R.S. 8180 9.3 8.2 113 35.3 22.7 156
LILY LAKE 9050 .2 4.9 4 23.9 19.7 121
MONTE CRISTO 8960 28.1 19.8 142 39.4 32.2 122
SALT RIVER SUMMIT 7600 4.9 .0 * 27.1 20.4 133
TRIAL LAKE 9960 25.9 19.4 134 39.1 30.2 129
----- -----
Basin wide percent of average 136 132
-----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1961-90.
Provisional data, subject to revision.
----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.