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: FEBRUARY 28 , 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 22.9 15.6 147 24.2 20.0 121
COTTONWOOD CREEK 7600 21.6 18.4 117 24.0 22.1 109
GRANITE CREEK 6770 19.4 15.3 127 20.9 21.0 100
GRASSY LAKE 7265 37.8 29.6 128 36.7 32.3 114
GROS VENTRE SUMMIT 8775 13.9 12.8 109 13.5 14.1 96
LEWIS LAKE DIVIDE 7860 36.9 29.3 126 29.5 32.8 90
PHILLIPS BENCH 8200 29.4 24.0 123 25.0 25.9 97
SALT RIVER SUMMIT 7600 14.2 12.0 118 16.3 15.0 109
SNAKE RIVER STATION 6920 20.1 16.1 125 23.3 22.7 103
SPRING CREEK DIVIDE 9000 25.5 23.1 110 24.8 23.9 104
THUMB DIVIDE 7980 21.1 14.2 149 19.7 18.7 105
TOGWOTEE PASS 9580 -M 20.7 * 25.7 24.5 105
TWO OCEAN PLATEAU 9360 32.7 22.1 148 23.4 27.5 85
WILLOW CREEK 8450 29.2 25.7 114 33.2 28.4 117
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Basin wide percent of average 126 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 23.2 19.8 117 20.9 15.0 139
BLACK BEAR 7950 45.8 31.5 145 -M 33.4 *
CANYON 7940 16.4 10.6 155 17.0 12.0 142
FISHER CREEK 9100 36.0 30.1 120 -M 30.5 *
MADISON PLATEAU 7750 -M 20.5 * 24.6 21.6 114
NORTHEAST ENTRANCE 7350 11.0 8.0 138 12.8 10.1 127
PARKER PEAK 9400 20.7 17.9 116 -M 13.0 *
SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154
THUMB DIVIDE 7980 21.1 14.2 149 19.7 18.7 105
TWO OCEAN PLATEAU 9360 32.7 22.1 148 23.4 27.5 85
WHISKEY CREEK 6800 18.9 14.4 131 19.5 17.9 109
WHITE MILL 8700 24.3 21.1 115 21.6 23.6 92
WOLVERINE 7650 12.9 10.0 129 11.6 10.9 106
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Basin wide percent of average 131 113
WIND RIVER
BURROUGHS CREEK 8750 15.5 13.0 119 16.9 13.9 122
COLD SPRINGS 9630 8.6 7.0 123 10.6 8.3 128
DEER PARK 9700 14.7 -M * 19.7 -M *
HOBBS PARK 10100 15.4 12.0 128 14.0 11.1 126
LITTLE WARM 9620 12.3 9.1 135 13.6 10.7 127
SOUTH PASS 9040 15.9 13.9 114 17.0 13.7 124
ST. LAWRENCE ALT 8620 6.3 6.2 102 9.3 7.9 118
TOGWOTEE PASS 9580 -M 20.7 * 25.7 24.5 105
TOWNSEND CREEK 8700 8.6 7.9 109 11.4 9.7 118
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Basin wide percent of average 120 119
BIGHORN BASIN
BALD MTN. 9375 17.6 16.9 104 16.3 14.0 116
BEAR TRAP MEADOW 7900 5.9 5.9 100 8.0 6.3 127
BLACKWATER 9780 27.2 17.9 152 22.6 15.1 150
BONE SPRINGS DIV 9350 13.7 13.3 103 13.9 11.6 120
EVENING STAR 9200 30.2 22.4 135 28.4 18.9 150
GRAVE SPRINGS 8550 6.6 7.5 88 9.4 7.4 127
KIRWIN 9550 11.1 8.0 139 13.0 8.5 153
MARQUETTE 8760 7.0 6.5 108 7.8 7.1 110
MIDDLE POWDER 7760 7.4 9.6 77 13.2 9.2 143
OWL CREEK 8975 5.5 3.7 149 6.1 4.9 124
POWDER RIVER PASS 9480 11.0 8.7 126 13.1 9.3 141
SHELL CREEK 9580 14.6 12.5 117 13.5 10.5 129
SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154
SYLVAN ROAD 8120 15.7 11.1 141 17.7 13.5 131
TIMBER CREEK 7950 4.6 4.9 94 6.3 5.1 124
YOUNTS PEAK 8350 19.3 14.7 131 17.1 13.8 124
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Basin wide percent of average 121 135
SHOSHONE RIVER
BLACKWATER 9780 27.2 17.9 152 22.6 15.1 150
EVENING STAR 9200 30.2 22.4 135 28.4 18.9 150
KIRWIN 9550 11.1 8.0 139 13.0 8.5 153
MARQUETTE 8760 7.0 6.5 108 7.8 7.1 110
SYLVAN LAKE 8420 23.2 18.4 126 25.0 16.2 154
SYLVAN ROAD 8120 15.7 11.1 141 17.7 13.5 131
YOUNTS PEAK 8350 19.3 14.7 131 17.1 13.8 124
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Basin wide percent of average 135 141
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.9 5.9 100 8.0 6.3 127
BIG GOOSE 7990 4.9 -M * 7.9 -M *
BONE SPRINGS DIV 9350 13.7 13.3 103 13.9 11.6 120
BURGESS JUNCTION 7880 7.0 9.6 73 8.8 8.5 104
CLOUD PEAK RESERVOIR 9860 12.4 11.0 113 10.8 10.2 106
DOME LAKE 8880 6.9 11.2 62 9.5 10.3 92
GRAVE SPRINGS 8550 6.6 7.5 88 9.4 7.4 127
HANSEN SAWMILL 8760 4.6 5.7 81 6.9 6.0 115
MIDDLE POWDER 7760 7.4 9.6 77 13.2 9.2 143
POWDER RIVER PASS 9480 11.0 8.7 126 13.1 9.3 141
SUCKER CREEK 8880 8.5 9.6 89 10.8 10.4 104
TIE CREEK 6870 2.9 -M * 6.8 8.2 83
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Basin wide percent of average 91 114
BELLE FOURCHE
BLIND PARK 6890 7.0 9.0 78 14.0 7.5 187
NORTH RAPID CREEK 6130 5.0 -M * 11.5 -M *
WARREN PEAK 6520 9.2 9.0 102 12.8 6.2 206
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Basin wide percent of average 90 196
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.3 20.8 88 18.9 20.4 93
DIVIDE PEAK 8800 16.4 16.7 98 21.8 18.6 117
ELK RIVER 8700 16.2 16.6 98 19.5 15.4 127
JOE WRIGHT 10120 17.4 17.3 101 23.1 20.1 115
NORTH FRENCH CREEK 10100 25.3 20.2 125 25.7 18.8 137
OLD BATTLE 10000 24.2 26.0 93 30.9 24.3 127
SOUTH BRUSH CREEK 8400 11.3 9.3 122 16.9 12.8 132
TOWER 10500 37.9 37.0 102 34.4 29.8 115
WEBBER SPRINGS 9200 16.5 22.1 75 22.4 20.6 109
WILLOW CREEK PASS 9540 10.0 9.1 110 10.3 9.8 105
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Basin wide percent of average 99 117
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.3 19.8 92 19.4 15.4 126
CASPER MTN. 7900 9.4 12.2 77 14.3 10.7 134
DEADMAN HILL 10220 14.7 13.4 110 15.0 12.9 116
DEER PARK 9700 14.7 -M * 19.7 -M *
LAPRELE CREEK 8320 -M 8.3 * 12.6 9.0 140
RENO HILL 8400 11.3 10.7 106 16.0 14.5 110
ROACH 9700 14.4 13.9 104 16.9 17.2 98
SAND LAKE 10080 28.9 26.6 109 24.8 16.4 151
SOUTH PASS 9040 15.9 13.9 114 17.0 13.7 124
WINDY PEAK 7840 5.3 6.1 87 11.2 7.1 158
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Basin wide percent of average 101 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.1 9.8 123 15.7 12.5 126
DIVIDE PEAK 8800 16.4 16.7 98 21.8 18.6 117
OLD BATTLE 10000 24.2 26.0 93 30.9 24.3 127
SANDSTONE RS 8150 11.6 12.1 96 18.2 15.3 119
WHISKEY PARK 8950 23.2 23.4 99 24.0 22.4 107
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Basin wide percent of average 99 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.1 12.0 118 13.1 14.4 91
BLIND BULL SUM 8650 26.0 24.1 108 20.3 20.9 97
EAST RIM DIVIDE 7930 12.5 11.9 105 12.8 13.5 95
ELKHART PARK G.S. 9400 12.3 11.3 109 12.7 14.2 89
GROS VENTRE SUMMIT 8775 13.9 12.8 109 13.5 14.1 96
KENDALL R.S. 7740 14.4 12.4 116 14.5 13.8 105
LOOMIS PARK 8240 -M 14.8 * 18.4 16.7 110
NEW FORK LAKE 8340 11.4 9.8 116 11.1 12.8 87
SNIDER BASIN 8250 15.0 12.7 118 14.8 13.5 110
SPRING CREEK DIVIDE 9000 25.5 23.1 110 24.8 23.9 104
TRIPLE PEAK 8500 24.6 21.6 114 25.3 27.7 91
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Basin wide percent of average 112 98
LOWER GREEN RIVER
HAMS FORK 7840 12.8 10.4 123 9.8 11.8 83
HEWINTA 9500 9.7 8.4 115 12.2 10.1 121
HICKERSON PARK 9150 5.7 5.0 114 8.2 7.2 114
HOLE-IN-ROCK 9150 5.9 4.5 131 8.6 7.2 119
INDIAN CREEK 9425 25.5 22.7 112 21.0 22.4 94
KELLEY R.S. 8180 14.9 14.1 106 16.5 16.7 99
STEEL CREEK PARK 10100 12.4 12.5 99 14.2 10.2 139
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Basin wide percent of average 112 106
UPPER BEAR RIVER
BUG LAKE 7950 19.1 16.8 114 17.3 15.8 109
HAYDEN FORK 9400 13.4 13.6 99 17.2 15.1 114
KELLEY R.S. 8180 14.9 14.1 106 16.5 16.7 99
LILY LAKE 9050 11.6 10.5 110 15.5 11.6 134
MONTE CRISTO 8960 23.2 23.2 100 23.0 20.6 112
SALT RIVER SUMMIT 7600 14.2 12.0 118 16.3 15.0 109
TRIAL LAKE 9960 17.8 21.0 85 18.6 19.5 95
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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.