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 THURSDAY: MAY 22 , 1997
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 8.3 2.8 296 39.4 27.0 146
COTTONWOOD CREEK 7600 14.9 8.2 182 40.7 30.2 135
GRANITE CREEK 6770 12.1 5.0 242 35.9 28.8 125
GRASSY LAKE 7265 26.7 20.9 128 62.1 44.9 138
GROS VENTRE SUMMIT 8775 12.0 5.9 203 23.5 19.5 121
LEWIS LAKE DIVIDE 7860 37.4 25.6 146 64.7 45.6 142
PHILLIPS BENCH 8200 31.5 22.1 143 51.7 36.0 144
SALT RIVER SUMMIT 7600 .2 .0 * 27.7 20.7 134
SNAKE RIVER STATION 6920 .2 6.8 3 41.6 31.5 132
SPRING CREEK DIVIDE 9000 26.4 23.1 114 37.9 32.8 116
THUMB DIVIDE 7980 11.2 6.6 170 38.1 25.3 151
TOGWOTEE PASS 9580 28.0 25.0 112 40.3 34.2 118
TWO OCEAN PLATEAU 9360 40.1 24.7 162 -M 37.2 *
WILLOW CREEK 8450 27.8 24.3 114 54.9 38.8 141
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Basin wide percent of average 138 134
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 22.6 * 35.5 23.8 149
BLACK BEAR 7950 -M 33.1 * -M 49.3 *
CANYON 7940 7.7 4.4 175 29.9 18.1 165
FISHER CREEK 9100 48.8 35.1 139 -M 45.5 *
MADISON PLATEAU 7750 24.2 14.2 170 46.8 32.2 145
NORTHEAST ENTRANCE 7350 .2 1.6 12 23.6 15.7 150
PARKER PEAK 9400 28.2 21.0 134 28.4 20.4 139
SYLVAN LAKE 8420 -M 17.9 * 37.6 25.0 150
THUMB DIVIDE 7980 11.2 6.6 170 38.1 25.3 151
TWO OCEAN PLATEAU 9360 40.1 24.7 162 -M 37.2 *
WHISKEY CREEK 6800 10.0 6.1 164 35.6 26.7 133
WHITE MILL 8700 34.2 22.6 151 36.8 35.3 104
WOLVERINE 7650 .4 1.8 22 19.2 17.2 112
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Basin wide percent of average 148 138
WIND RIVER
BURROUGHS CREEK 8750 12.6 4.9 257 29.4 21.5 137
CHRISTINA LAKE 9980 15.9 14.1 113 28.0 22.4 125
COLD SPRINGS 9630 .1 1.8 6 16.9 15.1 112
HOBBS PARK 10100 16.1 13.8 117 19.8 19.7 101
LITTLE WARM 9620 4.6 3.5 131 25.8 18.3 141
SOUTH PASS 9040 16.3 13.8 118 30.2 22.9 132
ST. LAWRENCE ALT 8620 .0 1.5 0 16.5 14.1 117
TOGWOTEE PASS 9580 28.0 25.0 112 40.3 34.2 118
TOWNSEND CREEK 8700 .2 4.3 5 18.4 17.6 105
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Basin wide percent of average 113 121
BIGHORN BASIN
BALD MTN. 9375 20.5 22.0 93 23.0 23.8 97
BEAR TRAP MEADOW 7900 .2 .8 25 13.4 12.8 105
BLACKWATER 9780 -M 22.3 * 34.6 22.9 151
BONE SPRINGS DIV 9350 16.9 13.1 129 22.0 20.9 105
EVENING STAR 9200 34.3 28.3 121 47.0 28.6 164
GRAVE SPRINGS 8550 1.3 -M * 14.9 15.0 99
KIRWIN 9550 7.0 8.0 88 20.5 15.3 134
LOST CREEK 8080 14.4 10.4 138 20.9 17.6 119
MARQUETTE 8760 5.9 6.2 95 16.8 16.1 104
MIDDLE POWDER 7760 7.5 9.3 81 19.3 17.1 113
OWL CREEK 8975 .2 .6 33 9.7 9.9 98
POWDER RIVER PASS 9480 10.1 4.2 240 19.1 17.1 112
SHELL CREEK 9580 14.6 14.6 100 19.8 18.5 107
SYLVAN LAKE 8420 -M 17.9 * 37.6 25.0 150
SYLVAN ROAD 8120 .2 2.8 7 30.6 20.8 147
TIMBER CREEK 7950 .1 1.6 6 11.6 12.6 92
YOUNTS PEAK 8350 17.1 13.0 132 31.0 21.3 146
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Basin wide percent of average 110 124
SHOSHONE RIVER
BLACKWATER 9780 -M 22.3 * 34.6 22.9 151
EVENING STAR 9200 34.3 28.3 121 47.0 28.6 164
KIRWIN 9550 7.0 8.0 88 20.5 15.3 134
MARQUETTE 8760 5.9 6.2 95 16.8 16.1 104
SYLVAN LAKE 8420 -M 17.9 * 37.6 25.0 150
SYLVAN ROAD 8120 .2 2.8 7 30.6 20.8 147
YOUNTS PEAK 8350 17.1 13.0 132 31.0 21.3 146
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Basin wide percent of average 111 145
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .2 .8 25 13.4 12.8 105
BONE SPRINGS DIV 9350 16.9 13.1 129 22.0 20.9 105
BURGESS JUNCTION 7880 9.1 7.5 121 18.3 16.6 110
CLOUD PEAK RESERVOIR 9860 16.1 12.9 125 21.3 19.9 107
DOME LAKE 8880 7.5 7.7 97 20.5 19.0 108
GRAVE SPRINGS 8550 1.3 -M * 14.9 15.0 99
HANSEN SAWMILL 8760 .0 2.7 0 12.8 12.1 106
LOST CREEK 8080 14.4 10.4 138 20.9 17.6 119
MIDDLE POWDER 7760 7.5 9.3 81 19.3 17.1 113
POWDER RIVER PASS 9480 10.1 4.2 240 19.1 17.1 112
SUCKER CREEK 8880 12.0 7.8 154 22.6 19.2 118
TIE CREEK 6870 .1 -M * 18.3 16.0 114
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Basin wide percent of average 123 110
BELLE FOURCHE
BLIND PARK 6890 .0 2.7 0 20.3 16.8 121
NORTH RAPID CREEK 6130 .0 -M * 19.1 -M *
WARREN PEAK 6520 3.7 2.7 137 -M 12.3 *
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Basin wide percent of average 69 121*
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.7 9.4 71 38.9 30.0 130
DIVIDE PEAK 8800 7.8 8.5 92 29.8 29.7 100
ELK RIVER 8700 4.6 5.1 90 31.1 23.7 131
JOE WRIGHT 10120 22.6 21.0 108 38.1 33.4 114
NORTH FRENCH CREEK 10100 29.3 24.0 122 36.7 30.9 119
OLD BATTLE 10000 41.1 31.6 130 46.9 38.3 122
SOUTH BRUSH CREEK 8400 .0 3.9 0 22.6 22.4 101
TOWER 10500 57.8 48.2 120 60.0 47.4 127
WEBBER SPRINGS 9200 19.2 16.3 118 42.7 32.7 131
WILLOW CREEK PASS 9540 14.2 7.2 197 21.1 17.4 121
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Basin wide percent of average 116 120
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.7 19.9 124 35.1 26.0 135
CASPER MTN. 7900 11.6 8.0 145 27.5 21.6 127
CHRISTINA LAKE 9980 15.9 14.1 113 28.0 22.4 125
DEADMAN HILL 10220 16.5 15.1 109 25.1 23.5 107
LAPRELE CREEK 8320 .1 2.4 4 18.6 17.0 109
RENO HILL 8400 10.9 6.3 173 26.8 23.7 113
ROACH 9700 15.2 12.5 122 28.2 28.8 98
SAND LAKE 10080 37.4 31.0 121 36.8 27.2 135
SOUTH PASS 9040 16.3 13.8 118 30.2 22.9 132
WINDY PEAK 7840 .2 2.1 10 14.6 14.6 100
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Basin wide percent of average 119 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .3 .0 * -M 20.1 *
DIVIDE PEAK 8800 7.8 8.5 92 29.8 29.7 100
OLD BATTLE 10000 41.1 31.6 130 46.9 38.3 122
SANDSTONE RS 8150 .0 1.4 0* 26.4 25.0 106
WHISKEY PARK 8950 -M 19.8 * 41.3 36.9 112
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Basin wide percent of average 118* 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .3 5.8 5 19.8 19.9 99
BLIND BULL SUM 8650 44.0 19.9 221 37.6 28.7 131
EAST RIM DIVIDE 7930 5.4 10.4 52 19.1 18.6 103
ELKHART PARK G.S. 9400 5.8 7.6 76 21.4 19.6 109
GROS VENTRE SUMMIT 8775 12.0 5.9 203 23.5 19.5 121
KENDALL R.S. 7740 .9 .0 * 25.4 19.0 134
LOOMIS PARK 8240 -M 6.6 * 30.3 23.0 132
NEW FORK LAKE 8340 .1 3.6 3 16.0 17.7 90
SNIDER BASIN 8250 1.4 5.0 28 22.0 18.6 118
SPRING CREEK DIVIDE 9000 26.4 23.1 114 37.9 32.8 116
TRIPLE PEAK 8500 17.4 18.5 94 44.4 37.6 118
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Basin wide percent of average 113 117
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 19.2 16.4 117
HEWINTA 9500 .0 .0 100* 17.3 18.1 96
HICKERSON PARK 9150 .0 .4 0* 12.7 14.3 89
HOLE-IN-ROCK 9150 .1 .3 33* 13.3 14.3 93
INDIAN CREEK 9425 28.2 21.8 129 37.2 31.3 119
KELLEY R.S. 8180 4.9 5.9 83 35.5 23.0 154
STEEL CREEK PARK 10100 12.7 14.7 86 20.1 18.6 108
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Basin wide percent of average 106* 114
UPPER BEAR RIVER
BUG LAKE 7950 14.8 6.9 214 34.7 24.2 143
HAYDEN FORK 9400 .4 .4 100* 30.3 25.2 120
KELLEY R.S. 8180 4.9 5.9 83 35.5 23.0 154
LILY LAKE 9050 .2 3.8 5 24.0 20.1 119
MONTE CRISTO 8960 22.3 16.9 132 39.6 32.6 121
SALT RIVER SUMMIT 7600 .2 .0 * 27.7 20.7 134
TRIAL LAKE 9960 22.4 17.3 129 39.7 30.6 130
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Basin wide percent of average 127 131
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-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.
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-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.