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 MONDAY: FEBRUARY 15 , 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 18.8 14.1 133 -M 18.2 *
COTTONWOOD CREEK 7600 18.0 16.4 110 20.8 19.8 105
GRANITE CREEK 6770 16.6 13.9 119 18.5 19.2 96
GRASSY LAKE 7265 31.6 29.8 106 31.4 29.5 106
GROS VENTRE SUMMIT 8775 12.6 11.7 108 12.4 12.9 96
LEWIS LAKE DIVIDE 7860 30.9 26.4 117 28.5 30.0 95
PHILLIPS BENCH 8200 24.8 22.0 113 23.2 23.7 98
SALT RIVER SUMMIT 7600 12.4 10.6 117 14.5 13.7 106
SNAKE RIVER STATION 6920 16.9 14.5 117 20.3 20.7 98
SPRING CREEK DIVIDE 9000 22.1 20.7 107 22.1 21.8 101
THUMB DIVIDE 7980 18.8 12.9 146 18.0 17.1 105
TOGWOTEE PASS 9580 -M 18.9 * 23.1 22.4 103
TWO OCEAN PLATEAU 9360 29.2 20.4 143 23.3 25.1 93
WILLOW CREEK 8450 25.2 23.8 106 29.1 25.7 113
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Basin wide percent of average 117 101
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 21.1 18.0 117 19.0 13.6 140
BLACK BEAR 7950 39.7 28.3 140 -M 30.1 *
CANYON 7940 14.9 9.5 157 15.4 11.0 140
FISHER CREEK 9100 32.0 27.3 117 -M 27.7 *
MADISON PLATEAU 7750 -M 18.5 * 23.9 19.6 122
NORTHEAST ENTRANCE 7350 9.7 7.3 133 11.5 9.3 124
PARKER PEAK 9400 18.8 16.2 116 -M 11.8 *
SYLVAN LAKE 8420 21.4 16.8 127 23.4 14.8 158
THUMB DIVIDE 7980 18.8 12.9 146 18.0 17.1 105
TWO OCEAN PLATEAU 9360 29.2 20.4 143 23.3 25.1 93
WHISKEY CREEK 6800 16.7 12.8 130 19.0 16.2 117
WHITE MILL 8700 21.1 19.3 109 19.0 21.6 88
WOLVERINE 7650 12.0 9.1 132 11.0 9.9 111
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Basin wide percent of average 129 116
WIND RIVER
BURROUGHS CREEK 8750 14.0 11.9 118 15.2 12.7 120
COLD SPRINGS 9630 8.1 6.4 127 9.9 7.7 129
DEER PARK 9700 14.3 -M * 18.6 -M *
HOBBS PARK 10100 14.4 11.0 131 13.4 10.2 131
LITTLE WARM 9620 11.3 8.2 138 12.4 9.9 125
SOUTH PASS 9040 15.3 12.7 120 16.4 12.3 133
ST. LAWRENCE ALT 8620 6.3 5.5 115 9.1 7.2 126
TOGWOTEE PASS 9580 -M 18.9 * 23.1 22.4 103
TOWNSEND CREEK 8700 8.4 7.1 118 11.1 8.8 126
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Basin wide percent of average 124 121
BIGHORN BASIN
BALD MTN. 9375 15.0 15.5 97 14.0 12.9 109
BEAR TRAP MEADOW 7900 5.4 5.4 100 7.7 5.9 131
BLACKWATER 9780 24.4 16.0 152 20.5 13.7 150
BONE SPRINGS DIV 9350 12.4 12.0 103 12.5 10.6 118
EVENING STAR 9200 27.3 20.4 134 27.6 17.2 160
GRAVE SPRINGS 8550 5.6 6.8 82 8.5 6.9 123
KIRWIN 9550 10.6 7.3 145 12.2 7.7 158
MARQUETTE 8760 6.7 5.9 114 7.5 6.5 115
MIDDLE POWDER 7760 6.3 8.7 72 12.0 8.5 141
OWL CREEK 8975 5.3 3.2 166 6.0 4.4 136
POWDER RIVER PASS 9480 9.8 7.9 124 11.9 8.6 138
SHELL CREEK 9580 13.3 11.5 116 12.5 9.8 128
SYLVAN LAKE 8420 21.4 16.8 127 23.4 14.8 158
SYLVAN ROAD 8120 14.2 9.9 143 16.2 12.4 131
TIMBER CREEK 7950 4.5 4.3 105 6.3 4.7 134
YOUNTS PEAK 8350 17.5 13.5 130 15.4 12.6 122
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Basin wide percent of average 121 136
SHOSHONE RIVER
BLACKWATER 9780 24.4 16.0 152 20.5 13.7 150
EVENING STAR 9200 27.3 20.4 134 27.6 17.2 160
KIRWIN 9550 10.6 7.3 145 12.2 7.7 158
MARQUETTE 8760 6.7 5.9 114 7.5 6.5 115
SYLVAN LAKE 8420 21.4 16.8 127 23.4 14.8 158
SYLVAN ROAD 8120 14.2 9.9 143 16.2 12.4 131
YOUNTS PEAK 8350 17.5 13.5 130 15.4 12.6 122
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Basin wide percent of average 136 145
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.4 5.4 100 7.7 5.9 131
BIG GOOSE 7990 4.7 -M * 7.8 -M *
BONE SPRINGS DIV 9350 12.4 12.0 103 12.5 10.6 118
BURGESS JUNCTION 7880 6.3 8.6 73 8.2 7.9 104
CLOUD PEAK RESERVOIR 9860 11.4 9.6 119 9.9 9.2 108
DOME LAKE 8880 6.6 10.1 65 8.7 9.6 91
GRAVE SPRINGS 8550 5.6 6.8 82 8.5 6.9 123
HANSEN SAWMILL 8760 4.5 5.2 87 6.8 5.5 124
MIDDLE POWDER 7760 6.3 8.7 72 12.0 8.5 141
POWDER RIVER PASS 9480 9.8 7.9 124 11.9 8.6 138
SUCKER CREEK 8880 7.8 8.7 90 10.2 9.6 106
TIE CREEK 6870 2.6 -M * 6.3 7.5 84
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Basin wide percent of average 92 114
BELLE FOURCHE
BLIND PARK 6890 5.5 8.2 67 12.5 6.9 181
NORTH RAPID CREEK 6130 4.3 -M * 10.9 -M *
WARREN PEAK 6520 6.4 8.2 78 11.0 5.7 193
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Basin wide percent of average 73 187
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.5 18.4 84 16.7 18.5 90
DIVIDE PEAK 8800 15.3 15.1 101 20.7 17.4 119
ELK RIVER 8700 -M 14.8 * 18.3 14.0 131
JOE WRIGHT 10120 15.8 15.8 100 21.2 18.4 115
NORTH FRENCH CREEK 10100 22.4 18.2 123 23.2 17.0 136
OLD BATTLE 10000 21.5 23.4 92 27.8 22.0 126
SOUTH BRUSH CREEK 8400 5.3 8.2 65 16.1 11.8 136
TOWER 10500 32.8 33.8 97 31.0 27.1 114
WEBBER SPRINGS 9200 14.5 20.0 73 20.3 18.7 109
WILLOW CREEK PASS 9540 9.5 8.3 114 10.3 8.9 116
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Basin wide percent of average 95 118
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.6 17.9 87 17.1 13.8 124
CASPER MTN. 7900 8.3 10.8 77 13.3 9.7 137
DEADMAN HILL 10220 12.9 12.4 104 14.3 11.7 122
DEER PARK 9700 14.3 -M * 18.6 -M *
LAPRELE CREEK 8320 .6 7.5 8 10.8 8.4 129
RENO HILL 8400 9.7 9.5 102 14.3 13.0 110
ROACH 9700 13.6 12.5 109 16.0 15.8 101
SAND LAKE 10080 25.1 24.1 104 22.2 14.8 150
SOUTH PASS 9040 15.3 12.7 120 16.4 12.3 133
WINDY PEAK 7840 4.1 5.3 77 10.2 6.5 157
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Basin wide percent of average 93 127
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.7 8.5 126 14.8 11.8 125
DIVIDE PEAK 8800 15.3 15.1 101 20.7 17.4 119
OLD BATTLE 10000 21.5 23.4 92 27.8 22.0 126
SANDSTONE RS 8150 10.0 10.8 93 16.8 14.4 117
WHISKEY PARK 8950 19.6 21.0 93 22.9 21.3 108
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Basin wide percent of average 98 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.2 10.7 123 12.3 13.2 93
BLIND BULL SUM 8650 23.0 21.8 106 18.4 18.9 97
EAST RIM DIVIDE 7930 11.2 10.6 106 11.5 12.4 93
ELKHART PARK G.S. 9400 11.3 10.4 109 11.8 13.0 91
GROS VENTRE SUMMIT 8775 12.6 11.7 108 12.4 12.9 96
KENDALL R.S. 7740 12.8 11.2 114 12.6 12.6 100
LOOMIS PARK 8240 -M 13.4 * 16.4 15.3 107
NEW FORK LAKE 8340 10.3 8.9 116 10.4 11.8 88
SNIDER BASIN 8250 12.8 11.3 113 12.9 12.4 104
SPRING CREEK DIVIDE 9000 22.1 20.7 107 22.1 21.8 101
TRIPLE PEAK 8500 20.5 19.7 104 21.9 25.3 87
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Basin wide percent of average 109 96
LOWER GREEN RIVER
HAMS FORK 7840 10.1 9.4 107 8.8 10.9 81
HEWINTA 9500 7.8 7.3 107 10.5 9.3 113
HICKERSON PARK 9150 5.2 4.3 121 7.7 6.6 117
HOLE-IN-ROCK 9150 5.1 3.9 131 8.1 6.6 123
INDIAN CREEK 9425 22.5 20.6 109 18.8 20.4 92
KELLEY R.S. 8180 13.1 12.6 104 14.8 15.2 97
STEEL CREEK PARK 10100 10.3 10.9 94 12.4 9.5 131
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Basin wide percent of average 107 103
UPPER BEAR RIVER
BUG LAKE 7950 15.7 14.8 106 14.9 14.4 103
HAYDEN FORK 9400 10.9 12.0 91 14.8 13.6 109
KELLEY R.S. 8180 13.1 12.6 104 14.8 15.2 97
LILY LAKE 9050 9.9 9.5 104 13.7 10.6 129
MONTE CRISTO 8960 19.5 19.9 98 20.2 18.7 108
SALT RIVER SUMMIT 7600 12.4 10.6 117 14.5 13.7 106
TRIAL LAKE 9960 15.2 18.2 84 16.2 17.5 93
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Basin wide percent of average 99 105
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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.