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 FRIDAY: MAY 7 , 1999
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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 15.1 8.2 185 29.9 25.9 116
COTTONWOOD CREEK 7600 23.4 17.5 134 34.2 28.9 119
GRANITE CREEK 6770 15.5 10.6 146 26.9 27.4 98
GRASSY LAKE 7265 40.5 31.2 131 48.0 42.8 113
GROS VENTRE SUMMIT 8775 16.4 12.4 134 18.7 18.5 102
LEWIS LAKE DIVIDE 7860 39.8 32.4 123 44.8 43.5 103
PHILLIPS BENCH 8200 35.3 27.9 127 36.4 34.3 107
SALT RIVER SUMMIT 7600 13.4 6.3 215 21.7 19.7 110
SNAKE RIVER STATION 6920 13.9 14.5 96 29.2 30.0 98
SPRING CREEK DIVIDE 9000 37.3 28.2 133 34.7 31.4 111
THUMB DIVIDE 7980 19.2 13.5 142 25.7 24.2 107
TOGWOTEE PASS 9580 -M 27.4 * 33.3 32.7 103
TWO OCEAN PLATEAU 9360 41.2 27.2 152 35.7 35.5 101
WILLOW CREEK 8450 32.2 30.2 107 45.8 37.0 124
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Basin wide percent of average 132 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 25.7 114 27.5 22.0 125
BLACK BEAR 7950 55.7 38.8 144 52.8 47.3 112
CANYON 7940 14.2 9.1 157 21.2 16.9 126
FISHER CREEK 9100 41.3 38.3 109 42.2 43.3 98
MADISON PLATEAU 7750 -M 21.9 * 36.7 30.7 120
NORTHEAST ENTRANCE 7350 4.5 4.5 98 16.7 14.5 115
PARKER PEAK 9400 -M 23.4 * -M 18.9 *
SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139
THUMB DIVIDE 7980 19.2 13.5 142 25.7 24.2 107
TWO OCEAN PLATEAU 9360 41.2 27.2 152 35.7 35.5 101
WHISKEY CREEK 6800 19.7 12.9 154 28.4 25.5 111
WHITE MILL 8700 30.9 25.9 120 28.9 33.4 87
WOLVERINE 7650 5.5 6.0 92 15.2 15.9 97
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Basin wide percent of average 128 110
WIND RIVER
BURROUGHS CREEK 8750 18.2 10.5 175 21.5 20.0 108
COLD SPRINGS 9630 18.9 5.1 369 23.4 13.7 171
DEER PARK 9700 26.2 -M * 32.3 -M *
HOBBS PARK 10100 29.9 17.7 170 27.2 18.0 152
LITTLE WARM 9620 19.9 8.4 239 23.2 16.9 138
SOUTH PASS 9040 25.2 17.5 145 29.9 21.4 141
ST. LAWRENCE ALT 8620 14.5 4.3 343 20.9 13.0 161
TOGWOTEE PASS 9580 -M 27.4 * 33.3 32.7 103
TOWNSEND CREEK 8700 20.2 8.1 249 25.7 16.2 159
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Basin wide percent of average 206 136
BIGHORN BASIN
BALD MTN. 9375 22.9 24.4 94 22.5 21.7 104
BEAR TRAP MEADOW 7900 .9 3.2 26 14.9 11.4 131
BLACKWATER 9780 35.4 25.4 140 29.2 21.4 137
BONE SPRINGS DIV 9350 20.4 17.7 116 21.9 18.9 116
EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.2 132
KIRWIN 9550 16.4 11.1 148 19.4 14.0 139
MARQUETTE 8760 17.2 8.2 210 19.2 14.4 135
MIDDLE POWDER 7760 17.2 14.5 118 23.2 15.5 150
OWL CREEK 8975 10.5 2.4 438 13.0 8.7 150
POWDER RIVER PASS 9480 12.5 8.7 143 20.2 15.5 131
SHELL CREEK 9580 18.2 17.0 107 19.0 16.7 114
SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139
SYLVAN ROAD 8120 9.7 6.3 154 21.7 19.4 113
TIMBER CREEK 7950 10.5 4.5 232 16.0 10.9 148
YOUNTS PEAK 8350 21.5 17.4 125 21.4 19.9 108
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Basin wide percent of average 127 130
SHOSHONE RIVER
BLACKWATER 9780 35.4 25.4 140 29.2 21.4 137
EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150
KIRWIN 9550 16.4 11.1 148 19.4 14.0 139
MARQUETTE 8760 17.2 8.2 210 19.2 14.4 135
SYLVAN LAKE 8420 24.4 22.5 109 31.9 23.2 139
SYLVAN ROAD 8120 9.7 6.3 154 21.7 19.4 113
YOUNTS PEAK 8350 21.5 17.4 125 21.4 19.9 108
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Basin wide percent of average 134 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 3.2 26 14.9 11.4 131
BIG GOOSE 7990 10.0 -M * 17.7 -M *
BONE SPRINGS DIV 9350 20.4 17.7 116 21.9 18.9 116
BURGESS JUNCTION 7880 11.0 12.5 88 16.2 15.1 107
CLOUD PEAK RESERVOIR 9860 24.4 17.2 143 23.9 18.0 133
DOME LAKE 8880 -M 13.0 * 16.9 17.2 99
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.2 132
HANSEN SAWMILL 8760 5.6 5.8 99 15.7 11.0 145
MIDDLE POWDER 7760 17.2 14.5 118 23.2 15.5 150
POWDER RIVER PASS 9480 12.5 8.7 143 20.2 15.5 131
SUCKER CREEK 8880 14.2 12.5 115 20.0 17.4 116
TIE CREEK 6870 -M -M * -M 14.5 *
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Basin wide percent of average 114 125
BELLE FOURCHE
BLIND PARK 6890 .0 7.5 0 18.4 14.7 126
NORTH RAPID CREEK 6130 .3 -M * 16.7 -M *
WARREN PEAK 6520 2.7 7.5 35 -M 11.0 *
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Basin wide percent of average 18 126*
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.4 18.7 94 28.9 28.7 101
DIVIDE PEAK 8800 22.2 16.4 135 31.2 28.0 112
ELK RIVER 8700 15.2 13.0 117 27.7 22.7 123
JOE WRIGHT 10120 24.2 24.4 100 32.7 31.2 105
NORTH FRENCH CREEK 10100 41.3 28.4 146 39.8 28.9 138
OLD BATTLE 10000 40.2 37.8 107 46.2 36.5 127
SOUTH BRUSH CREEK 8400 10.4 8.6 120 25.5 21.2 121
TOWER 10500 58.0 51.0 114 48.4 44.5 109
WEBBER SPRINGS 9200 22.7 23.7 96 33.4 31.4 107
WILLOW CREEK PASS 9540 16.0 12.5 130 15.4 16.0 96
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Basin wide percent of average 115 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.9 27.2 107 31.7 24.5 130
CASPER MTN. 7900 13.9 15.0 93 22.7 19.7 116
DEADMAN HILL 10220 22.4 18.9 119 23.7 21.9 109
DEER PARK 9700 26.2 -M * 32.3 -M *
LAPRELE CREEK 8320 .0 5.1 0 20.4 15.5 133
RENO HILL 8400 16.2 11.5 143 26.2 22.9 115
ROACH 9700 -M 17.4 * 25.7 26.7 97
SAND LAKE 10080 46.3 36.5 127 37.4 25.5 147
SOUTH PASS 9040 25.2 17.5 145 29.9 21.4 141
WINDY PEAK 7840 4.8 6.1 78 18.2 13.0 141
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Basin wide percent of average 115 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .6 2.8 22 22.7 19.0 119
DIVIDE PEAK 8800 22.2 16.4 135 31.2 28.0 112
OLD BATTLE 10000 40.2 37.8 107 46.2 36.5 127
SANDSTONE RS 8150 7.3 6.6 110 25.5 23.7 109
WHISKEY PARK 8950 32.9 27.9 119 37.4 34.9 108
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Basin wide percent of average 113 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.4 12.2 126 18.5 19.0 98
BLIND BULL SUM 8650 32.8 22.7 145 27.0 27.5 99
EAST RIM DIVIDE 7930 14.6 14.0 105 17.4 17.7 99
ELKHART PARK G.S. 9400 16.0 12.4 131 18.4 18.7 99
GROS VENTRE SUMMIT 8775 16.4 12.4 134 18.7 18.5 102
KENDALL R.S. 7740 11.0 6.1 179 19.2 18.2 107
LOOMIS PARK 8240 -M 13.5 * 24.0 21.9 110
NEW FORK LAKE 8340 11.5 8.0 145 15.2 16.9 91
SNIDER BASIN 8250 19.4 11.1 175 22.2 17.7 127
SPRING CREEK DIVIDE 9000 37.3 28.2 133 34.7 31.4 111
TRIPLE PEAK 8500 31.7 23.4 136 37.4 35.8 105
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Basin wide percent of average 138 104
LOWER GREEN RIVER
HAMS FORK 7840 9.6 3.3 291 17.7 15.6 113
HEWINTA 9500 13.7 3.2 442 18.9 16.9 112
HICKERSON PARK 9150 6.3 2.0 311 14.4 13.0 111
HOLE-IN-ROCK 9150 9.5 1.7 588 14.7 13.0 114
INDIAN CREEK 9425 38.3 27.2 141 33.0 29.9 111
KELLEY R.S. 8180 16.9 13.0 131 23.4 21.9 108
STEEL CREEK PARK 10100 21.4 18.0 119 22.7 16.9 135
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Basin wide percent of average 170 114
UPPER BEAR RIVER
BUG LAKE 7950 25.9 13.5 192 28.2 23.2 123
HAYDEN FORK 9400 15.0 4.1 366 27.4 23.7 116
KELLEY R.S. 8180 16.9 13.0 131 23.4 21.9 108
LILY LAKE 9050 13.5 7.5 181 23.7 18.7 127
MONTE CRISTO 8960 39.7 24.4 163 36.4 31.0 118
SALT RIVER SUMMIT 7600 13.4 6.3 215 21.7 19.7 110
TRIAL LAKE 9960 28.0 22.9 123 30.2 29.0 105
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Basin wide percent of average 167 115
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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.