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 SUNDAY: JANUARY 31 , 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 15.4 12.4 124 16.5 16.1 102
COTTONWOOD CREEK 7600 13.9 13.9 100 17.0 17.1 99
GRANITE CREEK 6770 12.1 12.2 99 14.3 17.0 84
GRASSY LAKE 7265 27.0 22.7 119 27.3 26.1 105
GROS VENTRE SUMMIT 8775 9.2 10.5 88 9.4 11.5 82
LEWIS LAKE DIVIDE 7860 25.3 22.5 112 25.8 26.6 97
PHILLIPS BENCH 8200 19.4 19.2 101 19.5 21.1 92
SALT RIVER SUMMIT 7600 8.7 8.9 98 11.0 12.2 90
SNAKE RIVER STATION 6920 14.5 12.3 118 17.9 18.4 97
SPRING CREEK DIVIDE 9000 16.5 18.0 92 17.1 19.2 89
THUMB DIVIDE 7980 14.8 11.3 131 14.6 15.1 97
TOGWOTEE PASS 9580 -M 16.7 * 19.6 19.9 98
TWO OCEAN PLATEAU 9360 23.9 18.1 132 20.8 22.3 93
WILLOW CREEK 8450 19.5 20.8 94 24.5 22.6 108
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Basin wide percent of average 109 96
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 18.7 15.9 118 16.8 12.0 140
BLACK BEAR 7950 31.4 24.2 130 -M 26.2 *
CANYON 7940 12.1 8.2 148 12.9 9.8 132
FISHER CREEK 9100 27.2 23.9 114 23.7 24.3 98
MADISON PLATEAU 7750 -M 15.9 * 19.7 17.1 115
NORTHEAST ENTRANCE 7350 8.5 6.3 135 10.4 8.2 127
PARKER PEAK 9400 16.4 14.2 115 -M 10.4 *
SYLVAN LAKE 8420 18.7 14.8 126 20.9 13.1 160
THUMB DIVIDE 7980 14.8 11.3 131 14.6 15.1 97
TWO OCEAN PLATEAU 9360 23.9 18.1 132 20.8 22.3 93
WHISKEY CREEK 6800 13.2 11.1 119 15.8 14.2 111
WHITE MILL 8700 18.3 16.6 110 16.7 19.1 87
WOLVERINE 7650 11.5 7.8 147 9.9 8.7 114
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Basin wide percent of average 125 111
WIND RIVER
BURROUGHS CREEK 8750 11.8 10.3 115 12.8 11.2 114
COLD SPRINGS 9630 6.5 5.8 112 8.2 6.9 119
DEER PARK 9700 10.2 -M * 13.8 -M *
HOBBS PARK 10100 10.5 9.9 106 10.3 9.1 113
LITTLE WARM 9620 8.7 7.1 123 9.8 8.8 111
SOUTH PASS 9040 11.1 11.2 99 12.6 10.7 118
ST. LAWRENCE ALT 8620 4.6 4.8 96 7.3 6.3 116
TOGWOTEE PASS 9580 -M 16.7 * 19.6 19.9 98
TOWNSEND CREEK 8700 5.6 6.1 92 8.1 7.7 105
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Basin wide percent of average 107 110
BIGHORN BASIN
BALD MTN. 9375 14.1 13.7 103 13.2 11.6 114
BEAR TRAP MEADOW 7900 4.5 4.8 94 6.9 5.4 128
BLACKWATER 9780 20.9 13.9 150 18.2 12.1 150
BONE SPRINGS DIV 9350 10.9 10.5 104 11.1 9.3 119
EVENING STAR 9200 23.9 17.7 135 24.6 15.2 162
GRAVE SPRINGS 8550 4.8 6.1 79 7.7 6.4 120
KIRWIN 9550 8.3 6.6 126 9.5 6.7 142
MARQUETTE 8760 6.2 5.1 122 7.0 5.8 121
MIDDLE POWDER 7760 5.0 7.7 65 11.0 7.7 143
OWL CREEK 8975 4.2 2.8 150 4.9 3.8 129
POWDER RIVER PASS 9480 8.4 6.9 122 10.5 7.7 136
SHELL CREEK 9580 12.1 10.1 120 10.9 8.8 124
SYLVAN LAKE 8420 18.7 14.8 126 20.9 13.1 160
SYLVAN ROAD 8120 12.3 8.4 146 14.4 11.0 131
TIMBER CREEK 7950 3.8 3.6 106 5.6 4.2 133
YOUNTS PEAK 8350 14.8 12.1 122 13.0 11.2 116
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Basin wide percent of average 119 135
SHOSHONE RIVER
BLACKWATER 9780 20.9 13.9 150 18.2 12.1 150
EVENING STAR 9200 23.9 17.7 135 24.6 15.2 162
KIRWIN 9550 8.3 6.6 126 9.5 6.7 142
MARQUETTE 8760 6.2 5.1 122 7.0 5.8 121
SYLVAN LAKE 8420 18.7 14.8 126 20.9 13.1 160
SYLVAN ROAD 8120 12.3 8.4 146 14.4 11.0 131
YOUNTS PEAK 8350 14.8 12.1 122 13.0 11.2 116
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Basin wide percent of average 134 143
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.5 4.8 94 6.9 5.4 128
BIG GOOSE 7990 3.8 -M * 6.7 -M *
BONE SPRINGS DIV 9350 10.9 10.5 104 11.1 9.3 119
BURGESS JUNCTION 7880 5.4 7.5 72 7.3 7.1 103
CLOUD PEAK RESERVOIR 9860 9.6 7.9 122 8.4 8.0 105
DOME LAKE 8880 5.6 8.9 63 7.4 8.6 86
GRAVE SPRINGS 8550 4.8 6.1 79 7.7 6.4 120
HANSEN SAWMILL 8760 3.8 4.6 83 5.8 5.0 116
MIDDLE POWDER 7760 5.0 7.7 65 11.0 7.7 143
POWDER RIVER PASS 9480 8.4 6.9 122 10.5 7.7 136
SUCKER CREEK 8880 6.9 7.4 93 9.0 8.5 106
TIE CREEK 6870 2.4 -M * 5.9 6.8 87
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Basin wide percent of average 90 113
BELLE FOURCHE
BLIND PARK 6890 5.3 7.1 75 12.4 6.1 203
NORTH RAPID CREEK 6130 4.0 -M * 10.7 -M *
WARREN PEAK 6520 6.0 7.1 85 10.9 5.2 210
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Basin wide percent of average 80 206
UPPER N. PLATTE RIVER
COLUMBINE 9400 13.5 15.6 87 15.0 16.2 93
DIVIDE PEAK 8800 12.9 13.2 98 18.3 16.0 114
ELK RIVER 8700 -M 12.4 * 16.2 12.4 131
JOE WRIGHT 10120 14.4 13.9 104 19.5 16.3 120
NORTH FRENCH CREEK 10100 19.7 15.9 124 20.1 15.0 134
OLD BATTLE 10000 18.3 20.3 90 24.4 19.2 127
SOUTH BRUSH CREEK 8400 5.2 7.0 74 14.7 10.7 137
TOWER 10500 27.7 29.7 93 26.7 23.9 112
WEBBER SPRINGS 9200 12.8 17.2 74 17.8 16.5 108
WILLOW CREEK PASS 9540 7.9 7.3 108 9.2 7.7 119
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Basin wide percent of average 95 118
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 13.5 15.9 85 15.8 12.0 132
CASPER MTN. 7900 6.9 9.3 74 12.3 8.6 143
DEADMAN HILL 10220 12.3 11.0 112 13.4 10.2 131
DEER PARK 9700 10.2 -M * 13.8 -M *
LAPRELE CREEK 8320 2.8 6.5 43 10.0 7.5 133
RENO HILL 8400 8.8 8.2 107 13.2 11.3 117
ROACH 9700 12.3 10.9 113 15.0 14.1 106
SAND LAKE 10080 21.8 21.0 104 20.5 12.9 159
SOUTH PASS 9040 11.1 11.2 99 12.6 10.7 118
WINDY PEAK 7840 3.6 4.5 80 9.3 5.8 160
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Basin wide percent of average 95 131
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.8 7.2 108 12.5 10.8 116
DIVIDE PEAK 8800 12.9 13.2 98 18.3 16.0 114
OLD BATTLE 10000 18.3 20.3 90 24.4 19.2 127
SANDSTONE RS 8150 7.9 9.2 86 14.6 13.2 111
WHISKEY PARK 8950 16.7 18.2 92 20.6 19.7 105
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Basin wide percent of average 93 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 10.5 9.5 111 9.8 11.8 83
BLIND BULL SUM 8650 17.8 18.8 95 14.8 16.6 89
EAST RIM DIVIDE 7930 8.5 9.2 92 8.9 11.0 81
ELKHART PARK G.S. 9400 8.6 8.8 98 9.2 11.6 79
GROS VENTRE SUMMIT 8775 9.2 10.5 88 9.4 11.5 82
KENDALL R.S. 7740 9.1 9.8 93 9.7 11.2 87
LOOMIS PARK 8240 9.7 11.5 84 12.8 13.7 93
NEW FORK LAKE 8340 7.5 7.8 96 7.8 10.5 74
SNIDER BASIN 8250 8.8 9.8 90 9.4 11.0 85
SPRING CREEK DIVIDE 9000 16.5 18.0 92 17.1 19.2 89
TRIPLE PEAK 8500 15.9 17.2 92 17.8 22.5 79
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Basin wide percent of average 93 84
LOWER GREEN RIVER
HAMS FORK 7840 7.3 8.0 91 7.0 9.7 72
HEWINTA 9500 5.8 6.1 95 9.1 8.3 110
HICKERSON PARK 9150 3.9 3.5 111 6.6 6.0 110
HOLE-IN-ROCK 9150 4.1 3.2 128 7.1 6.0 118
INDIAN CREEK 9425 16.1 17.7 91 13.8 18.1 76
KELLEY R.S. 8180 9.6 10.6 91 11.3 13.6 83
STEEL CREEK PARK 10100 8.7 9.7 90 10.7 8.5 126
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Basin wide percent of average 94 93
UPPER BEAR RIVER
BUG LAKE 7950 10.8 12.8 84 11.3 12.7 89
HAYDEN FORK 9400 8.4 10.1 83 12.3 11.8 104
KELLEY R.S. 8180 9.6 10.6 91 11.3 13.6 83
LILY LAKE 9050 8.0 8.0 100 11.4 9.4 121
MONTE CRISTO 8960 14.6 17.1 85 16.1 16.4 98
SALT RIVER SUMMIT 7600 8.7 8.9 98 11.0 12.2 90
TRIAL LAKE 9960 10.7 15.7 68 11.9 15.1 79
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Basin wide percent of average 85 94
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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.