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 22 , 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 21.1 14.9 142 -M 19.2 *
COTTONWOOD CREEK 7600 20.5 17.5 117 23.0 21.1 109
GRANITE CREEK 6770 18.7 14.7 127 20.4 20.1 101
GRASSY LAKE 7265 34.9 29.7 118 34.4 31.0 111
GROS VENTRE SUMMIT 8775 13.5 12.3 110 13.2 13.6 97
LEWIS LAKE DIVIDE 7860 34.1 27.9 122 28.6 31.5 91
PHILLIPS BENCH 8200 27.8 23.1 120 23.6 24.9 95
SALT RIVER SUMMIT 7600 13.8 11.4 121 15.9 14.4 110
SNAKE RIVER STATION 6920 18.7 15.4 121 22.1 21.8 101
SPRING CREEK DIVIDE 9000 24.3 22.0 110 23.8 22.9 104
THUMB DIVIDE 7980 -M 13.6 * -M 17.9 *
TOGWOTEE PASS 9580 -M 19.9 * 24.5 23.6 104
TWO OCEAN PLATEAU 9360 31.1 21.3 146 23.3 26.4 88
WILLOW CREEK 8450 28.0 24.8 113 31.6 27.2 116
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Basin wide percent of average 122 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 22.1 19.0 116 19.7 14.4 137
BLACK BEAR 7950 42.5 30.0 142 -M 31.9 *
CANYON 7940 16.0 10.1 158 16.3 11.6 141
FISHER CREEK 9100 34.0 28.8 118 -M 29.2 *
MADISON PLATEAU 7750 -M 19.6 * 24.3 20.7 117
NORTHEAST ENTRANCE 7350 10.6 7.7 138 12.3 9.7 127
PARKER PEAK 9400 19.9 17.1 116 -M 12.5 *
SYLVAN LAKE 8420 22.4 17.7 127 24.3 15.5 157
THUMB DIVIDE 7980 -M 13.6 * -M 17.9 *
TWO OCEAN PLATEAU 9360 31.1 21.3 146 23.3 26.4 88
WHISKEY CREEK 6800 18.1 13.7 132 19.3 17.1 113
WHITE MILL 8700 22.8 20.3 112 20.4 22.7 90
WOLVERINE 7650 12.6 9.6 131 11.4 10.5 109
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Basin wide percent of average 129 115
WIND RIVER
BURROUGHS CREEK 8750 14.9 12.5 119 16.1 13.3 121
COLD SPRINGS 9630 8.3 6.7 124 10.2 8.0 128
DEER PARK 9700 14.9 -M * 19.2 -M *
HOBBS PARK 10100 15.0 11.6 129 13.8 10.7 129
LITTLE WARM 9620 11.9 8.7 137 13.0 10.3 126
SOUTH PASS 9040 15.8 13.4 118 16.9 13.1 129
ST. LAWRENCE ALT 8620 6.4 5.9 108 9.2 7.6 121
TOGWOTEE PASS 9580 -M 19.9 * 24.5 23.6 104
TOWNSEND CREEK 8700 8.6 7.6 113 11.3 9.3 122
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Basin wide percent of average 122 120
BIGHORN BASIN
BALD MTN. 9375 16.5 16.3 101 15.3 13.5 113
BEAR TRAP MEADOW 7900 5.6 5.7 98 7.9 6.1 130
BLACKWATER 9780 25.6 17.0 151 21.7 14.5 150
BONE SPRINGS DIV 9350 13.1 12.7 103 13.2 11.1 119
EVENING STAR 9200 28.7 21.5 133 28.3 18.1 156
GRAVE SPRINGS 8550 6.0 7.2 83 8.8 7.2 122
KIRWIN 9550 10.9 7.7 142 12.6 8.2 154
MARQUETTE 8760 6.7 6.2 108 7.4 6.8 109
MIDDLE POWDER 7760 6.7 9.2 73 12.3 8.8 140
OWL CREEK 8975 5.4 3.5 154 5.9 4.6 128
POWDER RIVER PASS 9480 10.6 8.4 126 -M 9.0 *
SHELL CREEK 9580 14.2 12.1 117 13.1 10.2 128
SYLVAN LAKE 8420 22.4 17.7 127 24.3 15.5 157
SYLVAN ROAD 8120 -M 10.6 * -M 13.0 *
TIMBER CREEK 7950 4.6 4.6 100 6.3 4.9 129
YOUNTS PEAK 8350 18.6 14.2 131 16.4 13.3 123
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Basin wide percent of average 119 136
SHOSHONE RIVER
BLACKWATER 9780 25.6 17.0 151 21.7 14.5 150
EVENING STAR 9200 28.7 21.5 133 28.3 18.1 156
KIRWIN 9550 10.9 7.7 142 12.6 8.2 154
MARQUETTE 8760 6.7 6.2 108 7.4 6.8 109
SYLVAN LAKE 8420 22.4 17.7 127 24.3 15.5 157
SYLVAN ROAD 8120 -M 10.6 * -M 13.0 *
YOUNTS PEAK 8350 18.6 14.2 131 16.4 13.3 123
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Basin wide percent of average 134 145
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.6 5.7 98 7.9 6.1 130
BIG GOOSE 7990 4.9 -M * 7.8 -M *
BONE SPRINGS DIV 9350 13.1 12.7 103 13.2 11.1 119
BURGESS JUNCTION 7880 6.8 9.2 74 8.6 8.2 105
CLOUD PEAK RESERVOIR 9860 11.9 10.4 114 10.4 9.8 106
DOME LAKE 8880 6.8 10.7 64 9.2 10.0 92
GRAVE SPRINGS 8550 6.0 7.2 83 8.8 7.2 122
HANSEN SAWMILL 8760 4.6 5.5 84 6.9 5.8 119
MIDDLE POWDER 7760 6.7 9.2 73 12.3 8.8 140
POWDER RIVER PASS 9480 10.6 8.4 126 -M 9.0 *
SUCKER CREEK 8880 8.3 9.2 90 10.3 10.0 103
TIE CREEK 6870 2.8 -M * 6.6 7.8 85
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Basin wide percent of average 91 111
BELLE FOURCHE
BLIND PARK 6890 6.1 8.7 70 13.2 7.2 183
NORTH RAPID CREEK 6130 4.6 -M * 11.2 -M *
WARREN PEAK 6520 7.5 8.7 86 11.8 6.0 197
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Basin wide percent of average 78 189
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.1 19.7 87 18.0 19.5 92
DIVIDE PEAK 8800 16.3 16.0 102 21.3 18.1 118
ELK RIVER 8700 15.4 15.8 97 19.0 14.8 128
JOE WRIGHT 10120 16.6 16.6 100 21.9 19.3 113
NORTH FRENCH CREEK 10100 24.4 19.3 126 24.9 17.9 139
OLD BATTLE 10000 23.7 24.8 96 30.3 23.2 131
SOUTH BRUSH CREEK 8400 2.8 8.8 32 16.3 12.4 131
TOWER 10500 35.9 35.5 101 33.0 28.5 116
WEBBER SPRINGS 9200 16.0 21.2 75 21.7 19.7 110
WILLOW CREEK PASS 9540 10.0 8.8 114 10.6 9.4 113
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Basin wide percent of average 96 119
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 17.8 18.9 94 18.9 14.7 129
CASPER MTN. 7900 9.3 11.6 80 14.1 10.3 137
DEADMAN HILL 10220 14.3 13.0 110 14.8 12.3 120
DEER PARK 9700 14.9 -M * 19.2 -M *
LAPRELE CREEK 8320 -M 8.0 * 12.4 8.7 143
RENO HILL 8400 11.2 10.2 110 15.5 13.8 112
ROACH 9700 14.3 13.3 108 16.6 16.5 101
SAND LAKE 10080 27.7 25.5 109 23.9 15.6 153
SOUTH PASS 9040 15.8 13.4 118 16.9 13.1 129
WINDY PEAK 7840 5.4 5.8 93 11.2 6.8 165
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Basin wide percent of average 104 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.3 9.2 134 15.5 12.2 127
DIVIDE PEAK 8800 16.3 16.0 102 21.3 18.1 118
OLD BATTLE 10000 23.7 24.8 96 30.3 23.2 131
SANDSTONE RS 8150 11.6 11.5 101 17.6 14.9 118
WHISKEY PARK 8950 22.1 22.3 99 23.1 21.9 105
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Basin wide percent of average 103 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.9 11.4 122 12.8 13.9 92
BLIND BULL SUM 8650 25.1 23.1 109 19.9 20.0 100
EAST RIM DIVIDE 7930 12.2 11.3 108 12.5 13.0 96
ELKHART PARK G.S. 9400 12.0 10.9 110 12.4 13.7 91
GROS VENTRE SUMMIT 8775 13.5 12.3 110 13.2 13.6 97
KENDALL R.S. 7740 13.9 11.9 117 13.2 13.3 99
LOOMIS PARK 8240 -M 14.2 * 17.6 16.1 109
NEW FORK LAKE 8340 11.1 9.4 118 10.8 12.3 88
SNIDER BASIN 8250 14.4 12.1 119 14.3 13.0 110
SPRING CREEK DIVIDE 9000 24.3 22.0 110 23.8 22.9 104
TRIPLE PEAK 8500 23.0 20.7 111 24.0 26.6 90
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Basin wide percent of average 113 98
LOWER GREEN RIVER
HAMS FORK 7840 11.3 10.0 113 9.6 11.4 84
HEWINTA 9500 9.3 7.9 118 11.6 9.8 118
HICKERSON PARK 9150 5.7 4.7 121 8.1 6.9 117
HOLE-IN-ROCK 9150 5.8 4.2 138 8.6 6.9 125
INDIAN CREEK 9425 24.6 21.8 113 20.3 21.5 94
KELLEY R.S. 8180 14.5 13.4 108 16.1 16.0 101
STEEL CREEK PARK 10100 11.8 11.8 100 13.7 9.9 138
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Basin wide percent of average 112 107
UPPER BEAR RIVER
BUG LAKE 7950 18.3 15.9 115 16.7 15.1 111
HAYDEN FORK 9400 12.8 12.9 99 16.1 14.4 112
KELLEY R.S. 8180 14.5 13.4 108 16.1 16.0 101
LILY LAKE 9050 11.2 10.1 111 15.1 11.2 135
MONTE CRISTO 8960 22.5 21.7 104 22.4 19.7 114
SALT RIVER SUMMIT 7600 13.8 11.4 121 15.9 14.4 110
TRIAL LAKE 9960 17.4 19.7 88 18.2 18.6 98
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Basin wide percent of average 105 110
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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.