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: FEBRUARY 18 , 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 19.9 14.4 138 -M 18.6 *
COTTONWOOD CREEK 7600 18.8 16.9 111 21.4 20.3 105
GRANITE CREEK 6770 17.5 14.2 123 19.4 19.6 99
GRASSY LAKE 7265 33.1 29.8 111 32.9 30.1 109
GROS VENTRE SUMMIT 8775 13.0 12.0 108 12.8 13.2 97
LEWIS LAKE DIVIDE 7860 32.4 27.1 120 28.5 30.6 93
PHILLIPS BENCH 8200 26.0 22.5 116 23.5 24.2 97
SALT RIVER SUMMIT 7600 13.0 10.9 119 15.1 14.0 108
SNAKE RIVER STATION 6920 17.6 14.9 118 21.1 21.2 100
SPRING CREEK DIVIDE 9000 22.9 21.3 108 22.8 22.3 102
THUMB DIVIDE 7980 19.4 13.2 147 18.5 17.4 106
TOGWOTEE PASS 9580 -M 19.3 * 23.8 22.9 104
TWO OCEAN PLATEAU 9360 30.2 20.8 145 23.3 25.7 91
WILLOW CREEK 8450 26.3 24.2 109 29.4 26.3 112
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Basin wide percent of average 120 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 21.4 18.4 116 19.3 13.9 139
BLACK BEAR 7950 41.0 29.0 141 -M 30.9 *
CANYON 7940 15.3 9.8 156 15.9 11.2 142
FISHER CREEK 9100 32.8 27.9 118 -M 28.3 *
MADISON PLATEAU 7750 -M 19.0 * 24.1 20.0 121
NORTHEAST ENTRANCE 7350 10.1 7.5 135 11.8 9.5 124
PARKER PEAK 9400 19.5 16.6 117 -M 12.1 *
SYLVAN LAKE 8420 21.9 17.2 127 24.0 15.1 159
THUMB DIVIDE 7980 19.4 13.2 147 18.5 17.4 106
TWO OCEAN PLATEAU 9360 30.2 20.8 145 23.3 25.7 91
WHISKEY CREEK 6800 17.4 13.2 132 19.4 16.6 117
WHITE MILL 8700 21.8 19.7 111 19.6 22.0 89
WOLVERINE 7650 12.3 9.3 132 11.2 10.1 111
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Basin wide percent of average 130 116
WIND RIVER
BURROUGHS CREEK 8750 14.5 12.2 119 15.8 12.9 122
COLD SPRINGS 9630 8.1 6.5 125 10.0 7.8 128
DEER PARK 9700 14.6 -M * 18.7 -M *
HOBBS PARK 10100 14.5 11.2 129 13.8 10.4 133
LITTLE WARM 9620 11.4 8.4 136 12.7 10.1 126
SOUTH PASS 9040 15.5 13.0 119 16.6 12.6 132
ST. LAWRENCE ALT 8620 6.3 5.7 111 9.2 7.3 126
TOGWOTEE PASS 9580 -M 19.3 * 23.8 22.9 104
TOWNSEND CREEK 8700 8.3 7.3 114 11.0 9.0 122
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Basin wide percent of average 122 121
BIGHORN BASIN
BALD MTN. 9375 15.5 15.8 98 14.4 13.2 109
BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132
BLACKWATER 9780 25.0 16.4 152 21.2 14.0 151
BONE SPRINGS DIV 9350 12.4 12.3 101 12.6 10.8 117
EVENING STAR 9200 27.9 20.9 133 27.7 17.5 158
GRAVE SPRINGS 8550 5.8 7.0 83 8.7 7.0 124
KIRWIN 9550 10.7 7.5 143 12.5 7.9 158
MARQUETTE 8760 6.6 6.0 110 7.3 6.6 111
MIDDLE POWDER 7760 6.5 8.9 73 12.1 8.7 139
OWL CREEK 8975 5.3 3.3 161 5.9 4.5 131
POWDER RIVER PASS 9480 10.0 8.1 123 11.8 8.8 134
SHELL CREEK 9580 13.6 11.7 116 12.6 9.9 127
SYLVAN LAKE 8420 21.9 17.2 127 24.0 15.1 159
SYLVAN ROAD 8120 -M 10.2 * -M 12.6 *
TIMBER CREEK 7950 4.6 4.4 105 6.3 4.7 134
YOUNTS PEAK 8350 18.1 13.8 131 15.6 12.9 121
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Basin wide percent of average 119 136
SHOSHONE RIVER
BLACKWATER 9780 25.0 16.4 152 21.2 14.0 151
EVENING STAR 9200 27.9 20.9 133 27.7 17.5 158
KIRWIN 9550 10.7 7.5 143 12.5 7.9 158
MARQUETTE 8760 6.6 6.0 110 7.3 6.6 111
SYLVAN LAKE 8420 21.9 17.2 127 24.0 15.1 159
SYLVAN ROAD 8120 -M 10.2 * -M 12.6 *
YOUNTS PEAK 8350 18.1 13.8 131 15.6 12.9 121
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Basin wide percent of average 135 146
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132
BIG GOOSE 7990 4.7 -M * 7.6 -M *
BONE SPRINGS DIV 9350 12.4 12.3 101 12.6 10.8 117
BURGESS JUNCTION 7880 6.4 8.8 73 8.3 8.0 104
CLOUD PEAK RESERVOIR 9860 11.4 9.9 115 9.8 9.4 104
DOME LAKE 8880 6.5 10.4 62 8.9 9.7 92
GRAVE SPRINGS 8550 5.8 7.0 83 8.7 7.0 124
HANSEN SAWMILL 8760 4.2 5.3 79 6.8 5.6 121
MIDDLE POWDER 7760 6.5 8.9 73 12.1 8.7 139
POWDER RIVER PASS 9480 10.0 8.1 123 11.8 8.8 134
SUCKER CREEK 8880 7.8 8.9 88 9.9 9.8 101
TIE CREEK 6870 2.6 -M * 6.4 7.7 83
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Basin wide percent of average 90 113
BELLE FOURCHE
BLIND PARK 6890 5.8 8.4 69 12.9 7.0 184
NORTH RAPID CREEK 6130 4.5 -M * 11.1 -M *
WARREN PEAK 6520 6.8 8.4 81 11.2 5.8 193
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Basin wide percent of average 75 188
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.0 19.0 84 16.4 18.9 87
DIVIDE PEAK 8800 15.7 15.5 101 20.7 17.7 117
ELK RIVER 8700 -M 15.2 * -M 14.3 *
JOE WRIGHT 10120 15.9 16.1 99 21.1 18.7 113
NORTH FRENCH CREEK 10100 23.1 18.7 124 23.8 17.4 137
OLD BATTLE 10000 22.4 24.0 93 27.7 22.5 123
SOUTH BRUSH CREEK 8400 -M 8.5 * 16.1 12.0 134
TOWER 10500 34.0 34.5 99 31.7 27.7 114
WEBBER SPRINGS 9200 15.1 20.5 74 20.8 19.1 109
WILLOW CREEK PASS 9540 9.8 8.5 115 10.2 9.1 112
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Basin wide percent of average 97 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.5 18.3 90 17.8 14.2 125
CASPER MTN. 7900 9.1 11.1 82 14.0 9.9 141
DEADMAN HILL 10220 12.8 12.6 102 14.4 11.9 121
DEER PARK 9700 14.6 -M * 18.7 -M *
LAPRELE CREEK 8320 .5 7.7 6 11.7 8.5 138
RENO HILL 8400 10.7 9.8 109 15.1 13.3 114
ROACH 9700 14.0 12.8 109 15.5 16.1 96
SAND LAKE 10080 26.3 24.7 106 22.9 15.1 152
SOUTH PASS 9040 15.5 13.0 119 16.6 12.6 132
WINDY PEAK 7840 4.8 5.5 87 10.4 6.6 158
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Basin wide percent of average 95 128
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.5 8.8 131 15.0 11.9 126
DIVIDE PEAK 8800 15.7 15.5 101 20.7 17.7 117
OLD BATTLE 10000 22.4 24.0 93 27.7 22.5 123
SANDSTONE RS 8150 10.9 11.1 98 17.3 14.6 118
WHISKEY PARK 8950 20.5 21.6 95 22.9 21.5 107
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Basin wide percent of average 100 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.3 11.0 121 12.6 13.5 93
BLIND BULL SUM 8650 24.0 22.3 108 19.0 19.4 98
EAST RIM DIVIDE 7930 11.6 10.9 106 11.9 12.6 94
ELKHART PARK G.S. 9400 11.5 10.6 108 12.0 13.3 90
GROS VENTRE SUMMIT 8775 13.0 12.0 108 12.8 13.2 97
KENDALL R.S. 7740 13.3 11.5 116 12.8 12.9 99
LOOMIS PARK 8240 -M 13.7 * 17.0 15.6 109
NEW FORK LAKE 8340 10.6 9.1 116 10.4 12.0 87
SNIDER BASIN 8250 13.4 11.6 116 13.4 12.6 106
SPRING CREEK DIVIDE 9000 22.9 21.3 108 22.8 22.3 102
TRIPLE PEAK 8500 21.2 20.1 105 22.4 25.9 86
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Basin wide percent of average 110 96
LOWER GREEN RIVER
HAMS FORK 7840 10.6 9.6 110 9.1 11.1 82
HEWINTA 9500 8.3 7.6 109 10.7 9.5 113
HICKERSON PARK 9150 5.5 4.5 122 8.1 6.7 121
HOLE-IN-ROCK 9150 5.5 4.0 138 8.3 6.7 124
INDIAN CREEK 9425 23.2 21.1 110 19.3 20.9 92
KELLEY R.S. 8180 13.7 12.9 106 15.3 15.6 98
STEEL CREEK PARK 10100 10.9 11.3 96 12.8 9.6 133
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Basin wide percent of average 109 104
UPPER BEAR RIVER
BUG LAKE 7950 16.8 15.3 110 15.7 14.7 107
HAYDEN FORK 9400 11.5 12.4 93 15.0 13.9 108
KELLEY R.S. 8180 13.7 12.9 106 15.3 15.6 98
LILY LAKE 9050 10.5 9.7 108 14.2 10.8 131
MONTE CRISTO 8960 20.5 20.7 99 20.9 19.1 109
SALT RIVER SUMMIT 7600 13.0 10.9 119 15.1 14.0 108
TRIAL LAKE 9960 16.0 18.8 85 16.9 17.9 94
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Basin wide percent of average 101 107
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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.