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 THURSDAY: APRIL 29 , 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 17.9 11.5 158 29.0 25.2 116
COTTONWOOD CREEK 7600 24.5 20.5 120 31.7 28.2 113
GRANITE CREEK 6770 18.4 13.6 136 25.4 26.7 96
GRASSY LAKE 7265 41.8 34.4 122 44.8 41.8 108
GROS VENTRE SUMMIT 8775 16.9 14.2 120 17.5 18.0 98
LEWIS LAKE DIVIDE 7860 40.2 34.8 116 42.8 42.4 101
PHILLIPS BENCH 8200 36.3 29.7 123 34.5 33.5 103
SALT RIVER SUMMIT 7600 15.5 11.2 139 20.9 19.2 109
SNAKE RIVER STATION 6920 16.9 16.7 102 28.0 29.4 96
SPRING CREEK DIVIDE 9000 34.9 29.7 118 32.5 30.7 106
THUMB DIVIDE 7980 -M 15.5 * -M 23.5 *
TOGWOTEE PASS 9580 -M 28.2 * 32.0 31.9 101
TWO OCEAN PLATEAU 9360 40.3 27.5 147 34.7 34.5 101
WILLOW CREEK 8450 34.0 31.9 107 42.4 36.0 118
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Basin wide percent of average 123 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.2 26.0 105 26.7 21.0 127
BLACK BEAR 7950 -M 39.9 * 49.3 46.3 107
CANYON 7940 16.5 11.4 147 20.9 16.2 129
FISHER CREEK 9100 39.7 38.8 103 40.8 41.9 98
MADISON PLATEAU 7750 -M 24.2 * 34.7 29.7 117
NORTHEAST ENTRANCE 7350 7.5 6.3 120 16.0 13.9 116
PARKER PEAK 9400 27.4 23.7 116 -M 18.2 *
SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140
THUMB DIVIDE 7980 -M 15.5 * -M 23.5 *
TWO OCEAN PLATEAU 9360 40.3 27.5 147 34.7 34.5 101
WHISKEY CREEK 6800 21.2 15.6 136 26.4 24.9 107
WHITE MILL 8700 30.4 26.4 116 27.9 32.4 87
WOLVERINE 7650 9.6 8.6 112 14.6 15.1 97
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Basin wide percent of average 119 109
WIND RIVER
BURROUGHS CREEK 8750 18.4 13.4 138 20.0 19.4 104
COLD SPRINGS 9630 15.5 7.1 217 19.0 13.0 147
DEER PARK 9700 25.2 -M * 30.7 -M *
HOBBS PARK 10100 27.4 17.9 154 24.9 17.2 146
LITTLE WARM 9620 17.7 10.9 163 20.4 16.2 126
SOUTH PASS 9040 24.7 18.2 137 28.4 20.4 140
ST. LAWRENCE ALT 8620 13.6 5.8 239 -M 12.5 *
TOGWOTEE PASS 9580 -M 28.2 * 32.0 31.9 101
TOWNSEND CREEK 8700 -M 9.7 * -M 15.5 *
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Basin wide percent of average 161 123
BIGHORN BASIN
BALD MTN. 9375 22.4 23.9 94 21.5 20.7 105
BEAR TRAP MEADOW 7900 2.3 4.6 48 13.2 10.5 126
BLACKWATER 9780 34.8 25.7 136 28.2 20.5 138
BONE SPRINGS DIV 9350 20.9 18.4 114 21.2 18.0 118
EVENING STAR 9200 36.8 30.7 120 38.8 25.7 151
GRAVE SPRINGS 8550 11.2 11.5 98 15.6 12.4 127
KIRWIN 9550 15.9 11.7 136 18.2 13.2 138
MARQUETTE 8760 16.4 8.7 188 17.4 13.4 131
MIDDLE POWDER 7760 17.7 14.7 121 21.2 14.7 144
OWL CREEK 8975 9.0 3.7 248 10.1 8.0 127
POWDER RIVER PASS 9480 13.2 10.7 124 18.4 14.5 127
SHELL CREEK 9580 17.9 17.0 106 18.0 15.9 114
SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140
SYLVAN ROAD 8120 13.7 8.4 166 21.4 18.5 116
TIMBER CREEK 7950 9.7 6.1 160 13.6 10.0 138
YOUNTS PEAK 8350 21.5 18.4 117 20.9 19.2 109
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Basin wide percent of average 122 128
SHOSHONE RIVER
BLACKWATER 9780 34.8 25.7 136 28.2 20.5 138
EVENING STAR 9200 36.8 30.7 120 38.8 25.7 151
KIRWIN 9550 15.9 11.7 136 18.2 13.2 138
MARQUETTE 8760 16.4 8.7 188 17.4 13.4 131
SYLVAN LAKE 8420 26.9 23.9 113 31.0 22.2 140
SYLVAN ROAD 8120 13.7 8.4 166 21.4 18.5 116
YOUNTS PEAK 8350 21.5 18.4 117 20.9 19.2 109
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Basin wide percent of average 131 133
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.3 4.6 48 13.2 10.5 126
BIG GOOSE 7990 10.6 -M * 16.0 -M *
BONE SPRINGS DIV 9350 20.9 18.4 114 21.2 18.0 118
BURGESS JUNCTION 7880 12.0 13.5 89 15.5 14.4 108
CLOUD PEAK RESERVOIR 9860 22.0 17.7 125 21.2 16.9 125
DOME LAKE 8880 -M 15.0 * 15.9 16.2 98
GRAVE SPRINGS 8550 11.2 11.5 98 15.6 12.4 127
HANSEN SAWMILL 8760 6.1 7.0 88 13.2 10.2 130
MIDDLE POWDER 7760 17.7 14.7 121 21.2 14.7 144
POWDER RIVER PASS 9480 13.2 10.7 124 18.4 14.5 127
SUCKER CREEK 8880 14.5 13.9 106 18.9 16.4 116
TIE CREEK 6870 -M -M * -M 13.7 *
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Basin wide percent of average 108 121
BELLE FOURCHE
BLIND PARK 6890 -M 10.0 * 17.9 13.6 131
NORTH RAPID CREEK 6130 2.3 -M * 16.5 -M *
WARREN PEAK 6520 8.5 10.0 85 13.2 10.2 130
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Basin wide percent of average 85* 131
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.9 22.4 80 27.2 27.9 98
DIVIDE PEAK 8800 22.4 19.7 114 29.7 27.2 110
ELK RIVER 8700 16.0 16.9 95 26.7 22.0 121
JOE WRIGHT 10120 23.9 24.7 97 30.7 30.0 103
NORTH FRENCH CREEK 10100 38.3 29.4 131 36.5 27.9 132
OLD BATTLE 10000 36.8 38.0 97 43.0 35.4 122
SOUTH BRUSH CREEK 8400 10.2 11.0 93 22.9 20.4 113
TOWER 10500 54.5 50.9 108 45.9 42.8 108
WEBBER SPRINGS 9200 21.7 26.4 83 31.4 30.4 104
WILLOW CREEK PASS 9540 15.1 13.5 112 14.5 15.4 95
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Basin wide percent of average 102 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.7 29.0 82 29.4 23.7 125
CASPER MTN. 7900 15.1 18.0 84 21.2 18.5 115
DEADMAN HILL 10220 20.4 19.0 107 21.9 20.9 105
DEER PARK 9700 25.2 -M * 30.7 -M *
LAPRELE CREEK 8320 .0 6.8 0 19.4 14.6 133
RENO HILL 8400 17.4 13.7 128 24.4 22.2 110
ROACH 9700 19.0 18.2 105 24.9 25.5 98
SAND LAKE 10080 45.7 37.2 123 36.5 24.7 149
SOUTH PASS 9040 24.7 18.2 137 28.4 20.4 140
WINDY PEAK 7840 7.8 8.1 97 17.2 12.1 142
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Basin wide percent of average 104 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 6.1 5.6 109 21.7 18.4 119
DIVIDE PEAK 8800 22.4 19.7 114 29.7 27.2 110
OLD BATTLE 10000 36.8 38.0 97 43.0 35.4 122
SANDSTONE RS 8150 10.0 10.5 95 24.4 22.9 108
WHISKEY PARK 8950 31.4 29.9 106 34.9 33.8 104
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Basin wide percent of average 103 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.0 14.1 121 17.9 18.4 97
BLIND BULL SUM 8650 31.2 23.9 132 24.7 26.9 93
EAST RIM DIVIDE 7930 14.5 15.0 97 16.0 17.2 93
ELKHART PARK G.S. 9400 15.5 14.2 110 17.2 18.2 96
GROS VENTRE SUMMIT 8775 16.9 14.2 120 17.5 18.0 98
KENDALL R.S. 7740 13.4 11.0 121 18.4 17.5 106
LOOMIS PARK 8240 -M 15.5 * 22.4 21.4 106
NEW FORK LAKE 8340 12.5 9.5 133 14.0 16.4 86
SNIDER BASIN 8250 20.4 13.5 152 20.4 17.2 120
SPRING CREEK DIVIDE 9000 34.9 29.7 118 32.5 30.7 106
TRIPLE PEAK 8500 30.7 25.4 121 34.0 34.8 98
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Basin wide percent of average 122 100
LOWER GREEN RIVER
HAMS FORK 7840 12.0 5.8 206 15.7 15.1 104
HEWINTA 9500 12.7 5.8 219 17.4 16.2 109
HICKERSON PARK 9150 6.0 3.4 177 13.5 12.2 110
HOLE-IN-ROCK 9150 9.5 2.8 336 14.0 12.2 114
INDIAN CREEK 9425 35.9 29.2 124 30.7 29.2 106
KELLEY R.S. 8180 17.7 15.5 115 22.4 21.2 106
STEEL CREEK PARK 10100 19.2 18.9 102 20.9 16.0 131
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Basin wide percent of average 139 111
UPPER BEAR RIVER
BUG LAKE 7950 24.9 16.5 151 25.7 22.5 114
HAYDEN FORK 9400 13.4 7.3 185 24.2 22.9 106
KELLEY R.S. 8180 17.7 15.5 115 22.4 21.2 106
LILY LAKE 9050 13.1 9.4 141 21.9 17.9 124
MONTE CRISTO 8960 35.2 26.7 132 33.3 30.0 111
SALT RIVER SUMMIT 7600 15.5 11.2 139 20.9 19.2 109
TRIAL LAKE 9960 23.9 24.4 99 26.7 28.2 96
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Basin wide percent of average 130 109
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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.