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 WEDNESDAY: APRIL 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 18.4 11.7 158 28.9 25.0 116
COTTONWOOD CREEK 7600 24.9 20.7 121 31.4 28.0 113
GRANITE CREEK 6770 18.7 14.0 135 24.5 26.7 93
GRASSY LAKE 7265 42.8 34.8 124 44.8 41.7 108
GROS VENTRE SUMMIT 8775 16.9 14.4 119 17.4 18.0 97
LEWIS LAKE DIVIDE 7860 40.7 34.9 117 42.8 42.3 102
PHILLIPS BENCH 8200 36.4 29.9 123 34.3 33.4 103
SALT RIVER SUMMIT 7600 16.0 11.5 141 20.7 19.2 108
SNAKE RIVER STATION 6920 17.4 16.9 103 27.9 29.2 96
SPRING CREEK DIVIDE 9000 34.5 29.7 117 32.2 30.7 105
THUMB DIVIDE 7980 -M 15.6 * -M 23.4 *
TOGWOTEE PASS 9580 -M 28.2 * 31.7 31.7 100
TWO OCEAN PLATEAU 9360 38.8 27.5 142 34.4 34.4 100
WILLOW CREEK 8450 34.2 31.9 107 42.3 35.9 118
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Basin wide percent of average 123 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.7 26.0 99 26.2 21.0 125
BLACK BEAR 7950 -M 39.9 * 49.2 46.0 107
CANYON 7940 16.7 11.5 147 20.7 16.2 128
FISHER CREEK 9100 38.4 38.7 100 40.3 41.8 97
MADISON PLATEAU 7750 -M 24.2 * 34.5 29.7 117
NORTHEAST ENTRANCE 7350 8.0 6.5 122 15.5 13.9 113
PARKER PEAK 9400 27.2 23.7 115 -M 18.0 *
SYLVAN LAKE 8420 27.2 23.9 114 30.7 22.2 139
THUMB DIVIDE 7980 -M 15.6 * -M 23.4 *
TWO OCEAN PLATEAU 9360 38.8 27.5 142 34.4 34.4 100
WHISKEY CREEK 6800 21.4 15.9 136 26.4 24.7 107
WHITE MILL 8700 30.0 26.4 115 27.4 32.3 85
WOLVERINE 7650 10.0 8.9 114 14.1 15.0 95
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Basin wide percent of average 117 108
WIND RIVER
BURROUGHS CREEK 8750 18.2 13.5 136 19.9 19.2 104
COLD SPRINGS 9630 14.6 7.3 203 18.2 13.0 142
DEER PARK 9700 25.2 -M * 30.5 -M *
HOBBS PARK 10100 27.4 17.9 154 24.7 17.0 146
LITTLE WARM 9620 17.7 11.0 161 19.9 16.2 124
SOUTH PASS 9040 24.9 18.2 138 -M 20.4 *
ST. LAWRENCE ALT 8620 13.6 5.8 235 -M 12.4 *
TOGWOTEE PASS 9580 -M 28.2 * 31.7 31.7 100
TOWNSEND CREEK 8700 -M 9.7 * -M 15.4 *
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Basin wide percent of average 159 119
BIGHORN BASIN
BALD MTN. 9375 22.9 23.9 97 21.5 20.5 105
BEAR TRAP MEADOW 7900 2.7 4.8 55 13.0 10.5 125
BLACKWATER 9780 34.5 25.7 135 28.0 20.4 138
BONE SPRINGS DIV 9350 21.2 18.4 115 21.2 17.9 119
EVENING STAR 9200 36.3 30.7 119 38.0 25.7 149
GRAVE SPRINGS 8550 11.5 11.5 100 15.5 12.2 128
KIRWIN 9550 15.5 11.6 133 17.7 13.1 136
MARQUETTE 8760 15.5 8.7 179 16.5 13.2 126
MIDDLE POWDER 7760 18.2 14.6 124 21.0 14.6 144
OWL CREEK 8975 8.9 3.8 238 9.9 8.0 123
POWDER RIVER PASS 9480 13.5 10.9 125 18.2 14.5 127
SHELL CREEK 9580 18.7 16.9 111 18.0 15.7 115
SYLVAN LAKE 8420 27.2 23.9 114 30.7 22.2 139
SYLVAN ROAD 8120 14.2 8.5 168 21.2 18.4 116
TIMBER CREEK 7950 9.4 6.3 151 12.6 9.9 129
YOUNTS PEAK 8350 21.5 18.4 117 20.7 19.2 109
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Basin wide percent of average 123 127
SHOSHONE RIVER
BLACKWATER 9780 34.5 25.7 135 28.0 20.4 138
EVENING STAR 9200 36.3 30.7 119 38.0 25.7 149
KIRWIN 9550 15.5 11.6 133 17.7 13.1 136
MARQUETTE 8760 15.5 8.7 179 16.5 13.2 126
SYLVAN LAKE 8420 27.2 23.9 114 30.7 22.2 139
SYLVAN ROAD 8120 14.2 8.5 168 21.2 18.4 116
YOUNTS PEAK 8350 21.5 18.4 117 20.7 19.2 109
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Basin wide percent of average 130 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.7 4.8 55 13.0 10.5 125
BIG GOOSE 7990 11.0 -M * 16.0 -M *
BONE SPRINGS DIV 9350 21.2 18.4 115 21.2 17.9 119
BURGESS JUNCTION 7880 12.4 13.5 92 15.5 14.2 109
CLOUD PEAK RESERVOIR 9860 22.2 17.7 126 21.0 16.9 125
DOME LAKE 8880 -M 15.0 * 15.9 16.2 99
GRAVE SPRINGS 8550 11.5 11.5 100 15.5 12.2 128
HANSEN SAWMILL 8760 6.6 7.1 93 13.0 10.1 129
MIDDLE POWDER 7760 18.2 14.6 124 21.0 14.6 144
POWDER RIVER PASS 9480 13.5 10.9 125 18.2 14.5 127
SUCKER CREEK 8880 15.0 13.9 108 18.9 16.2 117
TIE CREEK 6870 -M -M * -M 13.6 *
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Basin wide percent of average 110 121
BELLE FOURCHE
BLIND PARK 6890 2.0 10.0 21 17.9 13.5 132
NORTH RAPID CREEK 6130 3.4 -M * 16.4 -M *
WARREN PEAK 6520 9.6 10.0 96 13.2 10.1 131
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Basin wide percent of average 59 132
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.2 22.7 81 26.9 27.9 97
DIVIDE PEAK 8800 23.0 19.9 117 29.7 26.9 111
ELK RIVER 8700 16.4 17.0 97 26.2 21.9 120
JOE WRIGHT 10120 23.7 24.7 96 30.5 29.9 103
NORTH FRENCH CREEK 10100 38.3 29.2 131 36.7 27.7 133
OLD BATTLE 10000 36.8 37.8 98 42.9 35.3 122
SOUTH BRUSH CREEK 8400 10.1 11.1 91 22.9 20.2 114
TOWER 10500 54.4 50.8 108 45.8 42.7 108
WEBBER SPRINGS 9200 22.0 26.5 84 31.4 30.2 104
WILLOW CREEK PASS 9540 15.0 13.5 112 14.2 15.2 94
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Basin wide percent of average 102 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.4 29.0 81 29.0 23.4 124
CASPER MTN. 7900 15.5 18.2 86 21.2 18.4 116
DEADMAN HILL 10220 20.2 18.9 107 21.7 20.7 105
DEER PARK 9700 25.2 -M * 30.5 -M *
LAPRELE CREEK 8320 .0 7.0 0 19.2 14.5 132
RENO HILL 8400 18.2 13.9 132 24.2 22.2 110
ROACH 9700 19.0 18.2 105 24.9 25.4 98
SAND LAKE 10080 45.3 37.0 123 36.3 24.4 149
SOUTH PASS 9040 24.9 18.2 138 -M 20.4 *
WINDY PEAK 7840 8.5 8.2 103 16.7 12.0 139
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Basin wide percent of average 104 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.3 6.0 122 21.5 18.2 119
DIVIDE PEAK 8800 23.0 19.9 117 29.7 26.9 111
OLD BATTLE 10000 36.8 37.8 98 42.9 35.3 122
SANDSTONE RS 8150 10.5 11.0 96 24.4 22.7 108
WHISKEY PARK 8950 31.5 29.9 106 34.8 33.5 104
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Basin wide percent of average 105 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.2 14.2 121 17.9 18.4 97
BLIND BULL SUM 8650 30.9 24.4 128 24.4 26.7 92
EAST RIM DIVIDE 7930 14.5 15.0 97 15.7 17.2 92
ELKHART PARK G.S. 9400 15.5 14.2 110 17.0 18.2 94
GROS VENTRE SUMMIT 8775 16.9 14.4 119 17.4 18.0 97
KENDALL R.S. 7740 13.7 11.1 124 18.2 17.5 105
LOOMIS PARK 8240 -M 15.5 * 22.2 21.2 105
NEW FORK LAKE 8340 12.7 9.5 134 14.0 16.4 86
SNIDER BASIN 8250 20.0 13.5 149 20.2 17.2 118
SPRING CREEK DIVIDE 9000 34.5 29.7 117 32.2 30.7 105
TRIPLE PEAK 8500 30.2 25.4 119 33.3 34.8 96
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Basin wide percent of average 121 99
LOWER GREEN RIVER
HAMS FORK 7840 12.5 5.8 214 15.4 15.1 102
HEWINTA 9500 12.7 6.0 212 17.4 16.0 109
HICKERSON PARK 9150 6.1 3.7 170 13.4 12.1 110
HOLE-IN-ROCK 9150 9.5 3.2 304 13.7 12.1 114
INDIAN CREEK 9425 35.9 29.2 123 30.4 29.0 105
KELLEY R.S. 8180 17.9 15.5 115 22.2 21.2 105
STEEL CREEK PARK 10100 18.9 18.9 100 20.5 15.9 130
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Basin wide percent of average 138 110
UPPER BEAR RIVER
BUG LAKE 7950 24.4 16.9 146 24.9 22.4 112
HAYDEN FORK 9400 13.1 7.5 178 23.7 22.7 105
KELLEY R.S. 8180 17.9 15.5 115 22.2 21.2 105
LILY LAKE 9050 13.0 9.5 137 21.5 17.7 122
MONTE CRISTO 8960 34.8 26.9 130 32.7 29.9 110
SALT RIVER SUMMIT 7600 16.0 11.5 141 20.7 19.2 108
TRIAL LAKE 9960 23.0 24.4 95 25.9 27.9 93
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Basin wide percent of average 128 107
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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.