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 TUESDAY: APRIL 27 , 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 19.4 12.1 161 28.9 24.9 117
COTTONWOOD CREEK 7600 25.0 20.9 120 31.2 27.9 112
GRANITE CREEK 6770 19.4 14.2 136 24.4 26.5 93
GRASSY LAKE 7265 43.0 34.9 124 44.8 41.4 108
GROS VENTRE SUMMIT 8775 16.9 14.5 117 17.4 17.9 97
LEWIS LAKE DIVIDE 7860 40.8 35.0 117 42.8 42.2 102
PHILLIPS BENCH 8200 35.8 29.9 120 34.3 33.3 103
SALT RIVER SUMMIT 7600 16.2 11.6 139 20.5 19.0 108
SNAKE RIVER STATION 6920 18.4 17.0 109 27.9 29.2 96
SPRING CREEK DIVIDE 9000 34.4 29.7 117 31.9 30.5 105
THUMB DIVIDE 7980 22.5 15.7 144 24.7 23.4 106
TOGWOTEE PASS 9580 -M 28.0 * 31.7 31.7 101
TWO OCEAN PLATEAU 9360 40.7 27.4 149 34.3 34.3 100
WILLOW CREEK 8450 33.8 31.9 106 41.9 35.8 118
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Basin wide percent of average 125 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.9 25.9 104 26.2 20.9 125
BLACK BEAR 7950 -M 39.9 * 49.2 45.9 107
CANYON 7940 16.9 11.6 145 20.7 16.2 129
FISHER CREEK 9100 37.2 38.7 97 39.8 41.7 96
MADISON PLATEAU 7750 -M 24.4 * 34.4 29.5 117
NORTHEAST ENTRANCE 7350 8.5 6.8 126 15.2 13.7 111
PARKER PEAK 9400 27.4 23.7 117 -M 17.9 *
SYLVAN LAKE 8420 27.5 23.9 116 30.7 22.0 140
THUMB DIVIDE 7980 22.5 15.7 144 24.7 23.4 106
TWO OCEAN PLATEAU 9360 40.7 27.4 149 34.3 34.3 100
WHISKEY CREEK 6800 21.7 16.0 136 26.2 24.7 107
WHITE MILL 8700 29.7 26.2 114 26.9 32.2 84
WOLVERINE 7650 11.0 9.1 120 14.1 15.0 95
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Basin wide percent of average 120 108
WIND RIVER
BURROUGHS CREEK 8750 18.2 13.6 134 19.9 19.2 105
COLD SPRINGS 9630 14.7 7.3 202 18.2 12.9 143
DEER PARK 9700 25.2 -M * -M -M *
HOBBS PARK 10100 27.4 17.7 155 24.7 16.9 147
LITTLE WARM 9620 17.5 11.2 157 19.9 16.0 125
SOUTH PASS 9040 24.9 18.0 139 26.4 20.2 131
ST. LAWRENCE ALT 8620 13.7 6.0 233 -M 12.2 *
TOGWOTEE PASS 9580 -M 28.0 * 31.7 31.7 101
TOWNSEND CREEK 8700 -M 9.9 * -M 15.2 *
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Basin wide percent of average 158 121
BIGHORN BASIN
BALD MTN. 9375 23.0 23.7 98 21.4 20.4 105
BEAR TRAP MEADOW 7900 2.8 5.0 58 13.0 10.4 127
BLACKWATER 9780 34.4 25.5 135 28.0 20.4 138
BONE SPRINGS DIV 9350 21.2 18.4 116 21.2 17.9 119
EVENING STAR 9200 36.2 30.5 119 37.9 25.5 149
GRAVE SPRINGS 8550 11.6 11.5 102 15.5 12.1 128
KIRWIN 9550 15.5 11.6 134 17.7 13.0 137
MARQUETTE 8760 15.5 8.7 179 16.5 13.0 127
MIDDLE POWDER 7760 18.5 14.6 127 20.9 14.5 145
OWL CREEK 8975 9.0 3.8 235 9.7 8.0 123
POWDER RIVER PASS 9480 13.5 10.9 125 18.2 14.4 127
SHELL CREEK 9580 18.9 16.9 112 17.9 15.6 115
SYLVAN LAKE 8420 27.5 23.9 116 30.7 22.0 140
SYLVAN ROAD 8120 -M 8.7 * -M 18.4 *
TIMBER CREEK 7950 9.5 6.3 152 12.6 9.7 130
YOUNTS PEAK 8350 21.7 18.4 118 20.7 19.0 109
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Basin wide percent of average 122 129
SHOSHONE RIVER
BLACKWATER 9780 34.4 25.5 135 28.0 20.4 138
EVENING STAR 9200 36.2 30.5 119 37.9 25.5 149
KIRWIN 9550 15.5 11.6 134 17.7 13.0 137
MARQUETTE 8760 15.5 8.7 179 16.5 13.0 127
SYLVAN LAKE 8420 27.5 23.9 116 30.7 22.0 140
SYLVAN ROAD 8120 -M 8.7 * -M 18.4 *
YOUNTS PEAK 8350 21.7 18.4 118 20.7 19.0 109
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Basin wide percent of average 128 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.8 5.0 58 13.0 10.4 127
BIG GOOSE 7990 11.1 -M * 16.0 -M *
BONE SPRINGS DIV 9350 21.2 18.4 116 21.2 17.9 119
BURGESS JUNCTION 7880 12.5 13.5 94 15.4 14.1 109
CLOUD PEAK RESERVOIR 9860 22.0 17.5 126 20.9 16.7 126
DOME LAKE 8880 -M 15.0 * 15.9 16.0 99
GRAVE SPRINGS 8550 11.6 11.5 102 15.5 12.1 128
HANSEN SAWMILL 8760 6.8 7.1 96 13.0 10.0 130
MIDDLE POWDER 7760 18.5 14.6 127 20.9 14.5 145
POWDER RIVER PASS 9480 13.5 10.9 125 18.2 14.4 127
SUCKER CREEK 8880 15.1 13.7 111 18.7 16.2 117
TIE CREEK 6870 -M -M * -M 13.5 *
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Basin wide percent of average 111 122
BELLE FOURCHE
BLIND PARK 6890 2.9 10.1 29 17.9 13.4 135
NORTH RAPID CREEK 6130 4.1 -M * 16.2 -M *
WARREN PEAK 6520 10.2 10.1 101 13.2 10.0 133
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Basin wide percent of average 65 134
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.5 22.7 82 26.9 27.7 98
DIVIDE PEAK 8800 22.5 20.0 113 29.4 26.9 110
ELK RIVER 8700 16.4 17.4 95 26.2 21.9 121
JOE WRIGHT 10120 23.7 24.7 96 30.5 29.7 104
NORTH FRENCH CREEK 10100 38.2 29.2 131 36.5 27.5 133
OLD BATTLE 10000 36.5 37.8 97 42.8 35.0 123
SOUTH BRUSH CREEK 8400 10.2 11.4 91 22.9 20.2 114
TOWER 10500 54.3 50.7 108 45.3 42.3 108
WEBBER SPRINGS 9200 22.2 26.7 84 31.0 29.9 104
WILLOW CREEK PASS 9540 15.0 13.5 112 14.2 15.1 95
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Basin wide percent of average 102 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.5 29.0 82 28.9 23.4 125
CASPER MTN. 7900 15.5 18.2 86 21.0 18.2 116
DEADMAN HILL 10220 20.4 18.9 108 21.5 20.7 105
DEER PARK 9700 25.2 -M * -M -M *
LAPRELE CREEK 8320 .0 7.3 0 19.0 14.5 132
RENO HILL 8400 18.2 14.0 130 24.2 22.0 110
ROACH 9700 19.2 18.2 105 24.7 25.2 99
SAND LAKE 10080 44.9 36.9 122 36.2 24.4 149
SOUTH PASS 9040 24.9 18.0 139 26.4 20.2 131
WINDY PEAK 7840 8.6 8.4 104 16.5 12.0 139
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Basin wide percent of average 104 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.8 6.5 122 21.4 18.2 119
DIVIDE PEAK 8800 22.5 20.0 113 29.4 26.9 110
OLD BATTLE 10000 36.5 37.8 97 42.8 35.0 123
SANDSTONE RS 8150 10.7 11.2 96 24.4 22.5 109
WHISKEY PARK 8950 30.9 29.9 104 34.8 33.3 105
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Basin wide percent of average 104 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.0 14.4 119 17.7 18.4 97
BLIND BULL SUM 8650 30.7 24.9 124 24.2 26.7 91
EAST RIM DIVIDE 7930 14.7 15.0 99 15.6 17.2 92
ELKHART PARK G.S. 9400 15.5 14.4 108 17.0 18.0 95
GROS VENTRE SUMMIT 8775 16.9 14.5 117 17.4 17.9 97
KENDALL R.S. 7740 14.1 11.4 125 18.2 17.4 105
LOOMIS PARK 8240 -M 15.6 * 22.2 21.2 105
NEW FORK LAKE 8340 12.9 9.5 135 14.0 16.2 86
SNIDER BASIN 8250 19.9 13.7 146 20.0 17.0 118
SPRING CREEK DIVIDE 9000 34.4 29.7 117 31.9 30.5 105
TRIPLE PEAK 8500 30.4 25.5 120 33.3 34.7 96
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Basin wide percent of average 120 99
LOWER GREEN RIVER
HAMS FORK 7840 12.7 5.8 219 15.2 15.0 102
HEWINTA 9500 12.4 6.3 196 17.0 16.0 107
HICKERSON PARK 9150 6.0 3.9 152 13.0 12.0 109
HOLE-IN-ROCK 9150 9.2 3.3 279 13.5 12.0 113
INDIAN CREEK 9425 35.7 29.4 122 30.2 28.9 105
KELLEY R.S. 8180 17.5 15.7 112 21.7 21.2 103
STEEL CREEK PARK 10100 18.4 18.7 98 20.2 15.7 129
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Basin wide percent of average 135 109
UPPER BEAR RIVER
BUG LAKE 7950 24.0 17.0 142 24.5 22.4 110
HAYDEN FORK 9400 12.7 7.8 165 23.4 22.5 105
KELLEY R.S. 8180 17.5 15.7 112 21.7 21.2 103
LILY LAKE 9050 12.5 9.9 127 20.9 17.7 119
MONTE CRISTO 8960 33.8 27.0 126 31.7 29.7 107
SALT RIVER SUMMIT 7600 16.2 11.6 139 20.5 19.0 108
TRIAL LAKE 9960 22.4 24.5 92 25.4 27.9 92
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Basin wide percent of average 123 106
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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.