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: APRIL 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 20.2 12.7 159 28.9 24.9 117
COTTONWOOD CREEK 7600 24.5 21.4 116 30.5 27.9 110
GRANITE CREEK 6770 19.9 14.9 134 24.4 26.4 93
GRASSY LAKE 7265 43.3 35.4 123 44.8 41.3 109
GROS VENTRE SUMMIT 8775 -M 14.7 * -M 17.9 *
LEWIS LAKE DIVIDE 7860 41.3 35.4 117 42.8 41.9 102
PHILLIPS BENCH 8200 35.0 30.2 117 34.0 33.2 103
SALT RIVER SUMMIT 7600 15.6 12.0 131 19.9 18.9 106
SNAKE RIVER STATION 6920 19.4 17.4 112 27.9 28.9 97
SPRING CREEK DIVIDE 9000 33.8 29.7 115 31.5 30.4 104
THUMB DIVIDE 7980 23.9 16.0 149 24.5 23.2 106
TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.4 101
TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.2 101
WILLOW CREEK 8450 33.4 31.9 105 41.2 35.7 116
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Basin wide percent of average 124 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.9 25.9 112 25.9 20.7 126
BLACK BEAR 7950 -M 40.0 * 48.8 45.5 108
CANYON 7940 17.4 12.0 146 20.7 16.0 129
FISHER CREEK 9100 39.3 38.5 102 39.3 41.3 96
MADISON PLATEAU 7750 -M 24.5 * -M 29.4 *
NORTHEAST ENTRANCE 7350 9.5 7.1 134 15.1 13.6 112
PARKER PEAK 9400 27.7 23.7 117 -M 17.9 *
SYLVAN LAKE 8420 28.2 23.9 118 30.7 21.9 141
THUMB DIVIDE 7980 23.9 16.0 149 24.5 23.2 106
TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.2 101
WHISKEY CREEK 6800 21.9 16.4 133 26.2 24.4 107
WHITE MILL 8700 29.4 26.2 113 26.7 31.9 84
WOLVERINE 7650 12.4 9.5 130 14.2 14.9 96
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Basin wide percent of average 124 107
WIND RIVER
BURROUGHS CREEK 8750 18.2 14.0 131 19.9 18.9 105
COLD SPRINGS 9630 -M 7.6 * 17.7 12.7 140
DEER PARK 9700 24.0 -M * -M -M *
HOBBS PARK 10100 26.2 17.5 150 23.7 16.7 142
LITTLE WARM 9620 17.7 11.6 152 19.7 15.9 125
SOUTH PASS 9040 -M 18.0 * 26.2 20.0 132
ST. LAWRENCE ALT 8620 -M 6.1 * -M 12.1 *
TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.4 101
TOWNSEND CREEK 8700 -M 10.0 * 22.5 15.0 150
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Basin wide percent of average 144* 124
BIGHORN BASIN
BALD MTN. 9375 22.7 23.5 97 21.2 20.2 105
BEAR TRAP MEADOW 7900 2.7 5.3 50 12.7 10.2 125
BLACKWATER 9780 34.5 25.4 136 27.9 20.2 139
BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 118
EVENING STAR 9200 36.7 30.4 121 37.9 25.4 150
GRAVE SPRINGS 8550 11.4 11.4 100 15.1 12.0 127
KIRWIN 9550 15.5 11.5 134 17.4 13.0 135
MARQUETTE 8760 15.4 8.7 176 16.4 12.9 129
MIDDLE POWDER 7760 18.4 14.5 128 20.7 14.4 145
OWL CREEK 8975 8.7 3.9 224 9.5 7.8 122
POWDER RIVER PASS 9480 13.4 11.0 121 17.9 14.1 127
SHELL CREEK 9580 18.9 16.9 112 17.7 15.5 115
SYLVAN LAKE 8420 28.2 23.9 118 30.7 21.9 141
SYLVAN ROAD 8120 -M 9.0 * -M 18.2 *
TIMBER CREEK 7950 9.5 6.3 150 12.5 9.5 131
YOUNTS PEAK 8350 22.0 18.4 120 20.7 18.9 111
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Basin wide percent of average 122 129
SHOSHONE RIVER
BLACKWATER 9780 34.5 25.4 136 27.9 20.2 139
EVENING STAR 9200 36.7 30.4 121 37.9 25.4 150
KIRWIN 9550 15.5 11.5 134 17.4 13.0 135
MARQUETTE 8760 15.4 8.7 176 16.4 12.9 129
SYLVAN LAKE 8420 28.2 23.9 118 30.7 21.9 141
SYLVAN ROAD 8120 -M 9.0 * -M 18.2 *
YOUNTS PEAK 8350 22.0 18.4 120 20.7 18.9 111
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Basin wide percent of average 129 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.7 5.3 50 12.7 10.2 125
BIG GOOSE 7990 11.0 -M * 15.5 -M *
BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 118
BURGESS JUNCTION 7880 12.6 13.4 95 15.0 14.0 108
CLOUD PEAK RESERVOIR 9860 21.4 17.4 123 20.4 16.4 124
DOME LAKE 8880 -M 15.0 * 15.2 15.9 97
GRAVE SPRINGS 8550 11.4 11.4 100 15.1 12.0 127
HANSEN SAWMILL 8760 6.5 7.3 89 12.5 10.0 127
MIDDLE POWDER 7760 18.4 14.5 128 20.7 14.4 145
POWDER RIVER PASS 9480 13.4 11.0 121 17.9 14.1 127
SUCKER CREEK 8880 14.7 13.7 108 18.2 16.0 114
TIE CREEK 6870 -M -M * -M 13.4 *
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Basin wide percent of average 109 120
BELLE FOURCHE
BLIND PARK 6890 3.8 10.5 36 17.7 13.1 136
NORTH RAPID CREEK 6130 4.8 -M * 16.0 -M *
WARREN PEAK 6520 11.0 10.5 105 12.7 10.0 129
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Basin wide percent of average 71 133
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.2 23.0 79 26.4 27.4 96
DIVIDE PEAK 8800 22.7 20.4 112 28.7 26.5 108
ELK RIVER 8700 16.4 17.9 92 25.5 21.7 119
JOE WRIGHT 10120 23.0 24.7 94 29.7 29.4 102
NORTH FRENCH CREEK 10100 36.3 29.0 125 34.8 27.2 128
OLD BATTLE 10000 35.2 37.4 94 41.5 34.8 120
SOUTH BRUSH CREEK 8400 10.0 11.5 87 21.7 19.9 110
TOWER 10500 52.8 50.4 105 44.8 41.9 107
WEBBER SPRINGS 9200 21.5 27.0 80 30.5 29.7 104
WILLOW CREEK PASS 9540 14.5 13.5 107 14.0 15.0 94
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Basin wide percent of average 99 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.4 29.0 74 28.2 23.0 123
CASPER MTN. 7900 15.2 18.4 84 20.7 17.9 116
DEADMAN HILL 10220 19.7 18.7 105 20.9 20.4 103
DEER PARK 9700 24.0 -M * -M -M *
LAPRELE CREEK 8320 .0 7.8 0 18.4 14.2 130
RENO HILL 8400 17.7 14.2 124 23.7 21.9 109
ROACH 9700 18.7 18.2 103 24.2 24.9 97
SAND LAKE 10080 43.0 36.8 118 34.8 24.0 145
SOUTH PASS 9040 -M 18.0 * 26.2 20.0 132
WINDY PEAK 7840 8.0 8.5 93 16.0 11.7 136
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Basin wide percent of average 95 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.3 7.1 102 20.5 17.9 115
DIVIDE PEAK 8800 22.7 20.4 112 28.7 26.5 108
OLD BATTLE 10000 35.2 37.4 94 41.5 34.8 120
SANDSTONE RS 8150 10.5 12.0 89 23.4 22.2 106
WHISKEY PARK 8950 30.5 30.2 102 33.8 32.9 103
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Basin wide percent of average 100 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.9 14.5 117 17.2 18.2 95
BLIND BULL SUM 8650 30.4 25.9 118 23.9 26.5 91
EAST RIM DIVIDE 7930 14.5 15.0 98 15.4 17.0 91
ELKHART PARK G.S. 9400 15.1 14.5 105 16.5 17.9 93
GROS VENTRE SUMMIT 8775 -M 14.7 * -M 17.9 *
KENDALL R.S. 7740 14.4 11.6 124 17.9 17.4 104
LOOMIS PARK 8240 -M 15.9 * 21.9 21.0 104
NEW FORK LAKE 8340 12.7 9.9 130 13.5 16.2 84
SNIDER BASIN 8250 19.7 14.0 141 19.9 16.9 118
SPRING CREEK DIVIDE 9000 33.8 29.7 115 31.5 30.4 104
TRIPLE PEAK 8500 29.9 25.9 116 32.8 34.4 96
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Basin wide percent of average 117 98
LOWER GREEN RIVER
HAMS FORK 7840 12.6 5.8 218 14.9 15.0 99
HEWINTA 9500 12.0 6.8 178 16.5 15.7 106
HICKERSON PARK 9150 6.1 4.3 142 12.5 11.9 106
HOLE-IN-ROCK 9150 9.4 3.8 245 13.2 11.9 112
INDIAN CREEK 9425 35.2 29.5 119 29.5 28.7 103
KELLEY R.S. 8180 17.0 16.0 107 21.2 20.9 101
STEEL CREEK PARK 10100 17.7 18.7 95 19.5 15.5 126
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Basin wide percent of average 130 107
UPPER BEAR RIVER
BUG LAKE 7950 23.9 17.5 137 24.0 22.2 109
HAYDEN FORK 9400 12.7 8.2 155 22.9 22.4 103
KELLEY R.S. 8180 17.0 16.0 107 21.2 20.9 101
LILY LAKE 9050 12.2 10.4 119 20.4 17.4 117
MONTE CRISTO 8960 31.9 27.4 117 30.7 29.4 105
SALT RIVER SUMMIT 7600 15.6 12.0 131 19.9 18.9 106
TRIAL LAKE 9960 21.7 24.9 88 24.9 27.5 91
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Basin wide percent of average 117 104
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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.