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 25 , 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 22.3 15.2 147 23.6 19.6 120
COTTONWOOD CREEK 7600 21.0 17.9 117 23.7 21.6 110
GRANITE CREEK 6770 19.1 15.0 127 20.7 20.5 101
GRASSY LAKE 7265 36.8 29.7 124 35.6 31.6 113
GROS VENTRE SUMMIT 8775 13.7 12.6 109 13.4 13.8 97
LEWIS LAKE DIVIDE 7860 35.8 28.6 125 29.2 32.1 91
PHILLIPS BENCH 8200 28.8 23.6 122 24.8 25.4 98
SALT RIVER SUMMIT 7600 14.0 11.7 120 16.2 14.7 110
SNAKE RIVER STATION 6920 19.6 15.7 125 22.7 22.2 102
SPRING CREEK DIVIDE 9000 24.9 22.6 110 24.3 23.4 104
THUMB DIVIDE 7980 20.8 13.9 150 19.5 18.3 107
TOGWOTEE PASS 9580 -M 20.3 * 25.2 24.0 105
TWO OCEAN PLATEAU 9360 32.2 21.7 148 23.3 27.0 86
WILLOW CREEK 8450 28.5 25.2 113 32.7 27.8 118
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Basin wide percent of average 125 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 23.2 19.4 120 20.9 14.7 142
BLACK BEAR 7950 44.9 30.7 146 -M 32.7 *
CANYON 7940 16.3 10.4 157 16.9 11.8 143
FISHER CREEK 9100 35.5 29.4 121 -M 29.8 *
MADISON PLATEAU 7750 -M 20.0 * 24.4 21.2 115
NORTHEAST ENTRANCE 7350 10.9 7.9 138 12.7 9.9 128
PARKER PEAK 9400 20.6 17.5 118 -M 12.7 *
SYLVAN LAKE 8420 23.0 18.0 128 24.8 15.9 156
THUMB DIVIDE 7980 20.8 13.9 150 19.5 18.3 107
TWO OCEAN PLATEAU 9360 32.2 21.7 148 23.3 27.0 86
WHISKEY CREEK 6800 18.6 14.0 133 19.5 17.5 111
WHITE MILL 8700 24.0 20.7 116 21.4 23.2 92
WOLVERINE 7650 13.0 9.8 133 11.6 10.7 108
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Basin wide percent of average 133 115
WIND RIVER
BURROUGHS CREEK 8750 15.3 12.8 120 16.7 13.6 123
COLD SPRINGS 9630 8.4 6.8 124 10.3 8.2 126
DEER PARK 9700 14.7 -M * 19.4 -M *
HOBBS PARK 10100 15.3 11.8 130 13.9 10.9 128
LITTLE WARM 9620 12.2 8.9 137 13.4 10.5 128
SOUTH PASS 9040 15.8 13.6 116 16.9 13.4 126
ST. LAWRENCE ALT 8620 6.4 6.0 107 9.2 7.8 118
TOGWOTEE PASS 9580 -M 20.3 * 25.2 24.0 105
TOWNSEND CREEK 8700 8.7 7.7 113 11.4 9.5 120
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Basin wide percent of average 121 120
BIGHORN BASIN
BALD MTN. 9375 16.8 16.6 101 15.7 13.8 114
BEAR TRAP MEADOW 7900 5.7 5.8 98 8.0 6.2 129
BLACKWATER 9780 27.0 17.4 155 22.3 14.8 151
BONE SPRINGS DIV 9350 13.4 13.0 103 13.6 11.4 119
EVENING STAR 9200 30.0 21.9 137 28.4 18.5 154
GRAVE SPRINGS 8550 6.5 7.4 88 9.2 7.3 126
KIRWIN 9550 11.1 7.9 141 12.9 8.3 155
MARQUETTE 8760 7.0 6.3 111 7.9 6.9 114
MIDDLE POWDER 7760 7.4 9.4 79 12.8 9.0 142
OWL CREEK 8975 5.5 3.6 153 6.2 4.7 132
POWDER RIVER PASS 9480 10.7 8.5 126 12.7 9.2 138
SHELL CREEK 9580 14.3 12.3 116 13.1 10.4 126
SYLVAN LAKE 8420 23.0 18.0 128 24.8 15.9 156
SYLVAN ROAD 8120 15.4 10.8 143 17.3 13.2 131
TIMBER CREEK 7950 4.6 4.7 98 6.3 5.0 126
YOUNTS PEAK 8350 19.1 14.4 133 16.9 13.5 125
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Basin wide percent of average 122 136
SHOSHONE RIVER
BLACKWATER 9780 27.0 17.4 155 22.3 14.8 151
EVENING STAR 9200 30.0 21.9 137 28.4 18.5 154
KIRWIN 9550 11.1 7.9 141 12.9 8.3 155
MARQUETTE 8760 7.0 6.3 111 7.9 6.9 114
SYLVAN LAKE 8420 23.0 18.0 128 24.8 15.9 156
SYLVAN ROAD 8120 15.4 10.8 143 17.3 13.2 131
YOUNTS PEAK 8350 19.1 14.4 133 16.9 13.5 125
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Basin wide percent of average 137 143
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.7 5.8 98 8.0 6.2 129
BIG GOOSE 7990 4.9 -M * 7.9 -M *
BONE SPRINGS DIV 9350 13.4 13.0 103 13.6 11.4 119
BURGESS JUNCTION 7880 7.1 9.4 76 8.8 8.4 105
CLOUD PEAK RESERVOIR 9860 12.3 10.7 115 10.8 10.0 108
DOME LAKE 8880 6.9 11.0 63 9.4 10.2 92
GRAVE SPRINGS 8550 6.5 7.4 88 9.2 7.3 126
HANSEN SAWMILL 8760 4.7 5.6 84 6.8 5.9 115
MIDDLE POWDER 7760 7.4 9.4 79 12.8 9.0 142
POWDER RIVER PASS 9480 10.7 8.5 126 12.7 9.2 138
SUCKER CREEK 8880 8.5 9.4 90 10.8 10.2 106
TIE CREEK 6870 2.9 -M * 6.8 8.0 85
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Basin wide percent of average 92 115
BELLE FOURCHE
BLIND PARK 6890 6.2 8.8 70 13.3 7.4 180
NORTH RAPID CREEK 6130 4.7 -M * 11.3 -M *
WARREN PEAK 6520 7.8 8.8 89 11.9 6.1 195
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Basin wide percent of average 80 187
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.8 20.3 88 18.7 19.9 94
DIVIDE PEAK 8800 16.5 16.3 101 21.7 18.3 119
ELK RIVER 8700 16.0 16.2 99 19.4 15.1 128
JOE WRIGHT 10120 17.2 16.9 102 22.8 19.7 116
NORTH FRENCH CREEK 10100 25.3 19.8 128 25.8 18.4 140
OLD BATTLE 10000 24.1 25.4 95 30.9 23.8 130
SOUTH BRUSH CREEK 8400 -M 9.1 * 16.9 12.6 134
TOWER 10500 37.1 36.3 102 33.9 29.2 116
WEBBER SPRINGS 9200 16.4 21.6 76 22.2 20.1 110
WILLOW CREEK PASS 9540 9.9 8.9 111 10.6 9.6 110
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Basin wide percent of average 99 119
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.3 19.3 95 19.4 15.0 129
CASPER MTN. 7900 9.6 11.9 81 14.4 10.5 137
DEADMAN HILL 10220 14.0 13.2 106 15.0 12.6 119
DEER PARK 9700 14.7 -M * 19.4 -M *
LAPRELE CREEK 8320 -M 8.1 * 12.6 8.9 142
RENO HILL 8400 11.3 10.4 109 15.9 14.1 113
ROACH 9700 14.4 13.6 106 16.8 16.9 99
SAND LAKE 10080 28.7 26.0 110 24.7 16.0 154
SOUTH PASS 9040 15.8 13.6 116 16.9 13.4 126
WINDY PEAK 7840 5.4 5.9 92 11.3 6.9 164
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Basin wide percent of average 103 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.2 9.5 128 15.7 12.4 127
DIVIDE PEAK 8800 16.5 16.3 101 21.7 18.3 119
OLD BATTLE 10000 24.1 25.4 95 30.9 23.8 130
SANDSTONE RS 8150 11.7 11.8 99 18.1 15.1 120
WHISKEY PARK 8950 23.0 22.9 100 23.4 22.1 106
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Basin wide percent of average 102 120
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.1 11.7 121 13.1 14.1 93
BLIND BULL SUM 8650 25.7 23.6 109 20.2 20.4 99
EAST RIM DIVIDE 7930 12.5 11.6 108 12.8 13.2 97
ELKHART PARK G.S. 9400 12.2 11.1 110 12.6 13.9 91
GROS VENTRE SUMMIT 8775 13.7 12.6 109 13.4 13.8 97
KENDALL R.S. 7740 14.2 12.1 117 14.5 13.5 107
LOOMIS PARK 8240 -M 14.5 * 18.2 16.4 111
NEW FORK LAKE 8340 11.3 9.6 118 11.1 12.6 88
SNIDER BASIN 8250 14.7 12.4 119 14.5 13.2 110
SPRING CREEK DIVIDE 9000 24.9 22.6 110 24.3 23.4 104
TRIPLE PEAK 8500 23.8 21.1 113 25.1 27.2 92
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Basin wide percent of average 113 99
LOWER GREEN RIVER
HAMS FORK 7840 12.6 10.2 124 9.7 11.6 84
HEWINTA 9500 9.4 8.2 115 12.0 9.9 121
HICKERSON PARK 9150 5.7 4.8 119 8.2 7.0 117
HOLE-IN-ROCK 9150 5.8 4.3 135 8.6 7.0 123
INDIAN CREEK 9425 25.1 22.2 113 20.7 21.9 95
KELLEY R.S. 8180 14.7 13.7 107 16.3 16.4 99
STEEL CREEK PARK 10100 12.1 12.1 100 14.0 10.1 139
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Basin wide percent of average 113 107
UPPER BEAR RIVER
BUG LAKE 7950 18.5 16.4 113 16.9 15.5 109
HAYDEN FORK 9400 13.0 13.2 98 16.9 14.7 115
KELLEY R.S. 8180 14.7 13.7 107 16.3 16.4 99
LILY LAKE 9050 11.3 10.3 110 15.2 11.4 133
MONTE CRISTO 8960 22.8 22.5 101 22.7 20.2 112
SALT RIVER SUMMIT 7600 14.0 11.7 120 16.2 14.7 110
TRIAL LAKE 9960 17.5 20.3 86 18.3 19.1 96
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Basin wide percent of average 103 109
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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.