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 21 , 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 20.7 14.1 147 28.7 24.5 117
COTTONWOOD CREEK 7600 24.2 22.2 110 29.9 27.4 110
GRANITE CREEK 6770 20.7 16.0 130 24.2 25.9 94
GRASSY LAKE 7265 42.5 36.4 117 44.2 40.8 109
GROS VENTRE SUMMIT 8775 16.5 15.4 108 16.9 17.7 96
LEWIS LAKE DIVIDE 7860 41.0 35.9 115 42.2 41.4 102
PHILLIPS BENCH 8200 35.4 30.4 117 33.8 32.8 104
SALT RIVER SUMMIT 7600 15.2 12.7 120 19.5 18.7 105
SNAKE RIVER STATION 6920 19.7 17.9 111 27.4 28.5 97
SPRING CREEK DIVIDE 9000 31.9 29.5 109 30.4 30.0 102
THUMB DIVIDE 7980 -M 16.7 * -M 22.9 *
TOGWOTEE PASS 9580 -M 27.5 * 30.9 31.0 100
TWO OCEAN PLATEAU 9360 40.5 27.0 150 33.8 33.8 100
WILLOW CREEK 8450 33.0 31.9 104 40.4 35.3 115
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Basin wide percent of average 119 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.7 25.7 108 24.9 20.4 123
BLACK BEAR 7950 47.2 40.2 118 -M 44.8 *
CANYON 7940 17.5 12.6 139 20.4 15.7 130
FISHER CREEK 9100 37.5 38.3 98 38.9 40.7 96
MADISON PLATEAU 7750 -M 25.0 * 34.0 28.9 118
NORTHEAST ENTRANCE 7350 10.5 8.0 133 15.0 13.4 113
PARKER PEAK 9400 25.9 23.4 111 -M 17.4 *
SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142
THUMB DIVIDE 7980 -M 16.7 * -M 22.9 *
TWO OCEAN PLATEAU 9360 40.5 27.0 150 33.8 33.8 100
WHISKEY CREEK 6800 21.7 17.2 127 25.7 24.0 108
WHITE MILL 8700 29.2 26.0 112 26.2 31.4 84
WOLVERINE 7650 12.1 10.5 116 13.7 14.5 95
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Basin wide percent of average 118 108
WIND RIVER
BURROUGHS CREEK 8750 17.7 14.5 122 19.4 18.5 105
COLD SPRINGS 9630 9.4 8.0 117 13.5 12.4 109
DEER PARK 9700 18.2 -M * 24.7 -M *
HOBBS PARK 10100 19.9 17.2 116 18.2 16.4 112
LITTLE WARM 9620 15.6 12.5 126 17.7 15.5 115
SOUTH PASS 9040 17.7 17.9 100 21.7 19.5 111
ST. LAWRENCE ALT 8620 8.1 6.5 125 12.0 11.9 101
TOGWOTEE PASS 9580 -M 27.5 * 30.9 31.0 100
TOWNSEND CREEK 8700 11.1 10.1 110 15.6 14.6 107
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Basin wide percent of average 115 107
BIGHORN BASIN
BALD MTN. 9375 22.4 23.0 98 20.7 19.7 106
BEAR TRAP MEADOW 7900 1.2 6.0 21 11.2 10.0 114
BLACKWATER 9780 32.8 25.2 131 27.0 19.9 137
BONE SPRINGS DIV 9350 19.9 18.4 109 19.9 17.2 116
EVENING STAR 9200 35.2 29.9 118 36.7 24.9 147
GRAVE SPRINGS 8550 10.7 11.0 98 14.0 11.5 121
KIRWIN 9550 13.7 11.5 121 15.6 12.5 125
MARQUETTE 8760 11.1 8.7 128 12.1 12.2 100
MIDDLE POWDER 7760 16.9 14.1 120 20.0 14.0 144
OWL CREEK 8975 6.5 4.3 149 7.8 7.5 105
POWDER RIVER PASS 9480 12.9 11.2 115 17.2 13.7 126
SHELL CREEK 9580 18.0 16.5 110 16.9 15.0 113
SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142
SYLVAN ROAD 8120 15.7 9.9 161 20.9 17.9 117
TIMBER CREEK 7950 6.0 6.5 93 9.0 9.1 98
YOUNTS PEAK 8350 22.4 18.4 122 20.5 18.5 111
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Basin wide percent of average 115 123
SHOSHONE RIVER
BLACKWATER 9780 32.8 25.2 131 27.0 19.9 137
EVENING STAR 9200 35.2 29.9 118 36.7 24.9 147
KIRWIN 9550 13.7 11.5 121 15.6 12.5 125
MARQUETTE 8760 11.1 8.7 128 12.1 12.2 100
SYLVAN LAKE 8420 27.7 23.9 116 30.2 21.4 142
SYLVAN ROAD 8120 15.7 9.9 161 20.9 17.9 117
YOUNTS PEAK 8350 22.4 18.4 122 20.5 18.5 111
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Basin wide percent of average 125 129
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.2 6.0 21 11.2 10.0 114
BIG GOOSE 7990 9.7 -M * 14.0 -M *
BONE SPRINGS DIV 9350 19.9 18.4 109 19.9 17.2 116
BURGESS JUNCTION 7880 12.0 13.2 91 14.1 13.5 105
CLOUD PEAK RESERVOIR 9860 20.0 17.2 117 18.4 16.0 116
DOME LAKE 8880 -M 15.0 * 14.2 15.5 93
GRAVE SPRINGS 8550 10.7 11.0 98 14.0 11.5 121
HANSEN SAWMILL 8760 4.6 7.5 63 11.0 9.6 114
MIDDLE POWDER 7760 16.9 14.1 120 20.0 14.0 144
POWDER RIVER PASS 9480 12.9 11.2 115 17.2 13.7 126
SUCKER CREEK 8880 13.6 13.5 101 17.2 15.5 112
TIE CREEK 6870 -M -M * -M 13.0 *
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Basin wide percent of average 100 116
BELLE FOURCHE
BLIND PARK 6890 4.5 11.0 42 17.5 12.6 139
NORTH RAPID CREEK 6130 5.5 -M * 15.6 -M *
WARREN PEAK 6520 11.2 11.0 103 12.5 9.6 130
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Basin wide percent of average 73 135
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.4 23.7 74 24.2 27.0 90
DIVIDE PEAK 8800 21.4 20.9 103 27.7 25.9 107
ELK RIVER 8700 15.1 18.9 80 24.0 21.2 114
JOE WRIGHT 10120 22.0 24.4 91 28.7 28.7 101
NORTH FRENCH CREEK 10100 34.8 28.7 121 33.2 26.7 125
OLD BATTLE 10000 33.4 36.8 91 39.8 33.9 118
SOUTH BRUSH CREEK 8400 10.5 12.2 87 21.4 19.2 111
TOWER 10500 49.2 49.8 99 41.8 40.9 103
WEBBER SPRINGS 9200 20.9 27.7 76 29.2 28.9 102
WILLOW CREEK PASS 9540 13.2 13.5 98 13.5 14.5 93
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Basin wide percent of average 93 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.2 29.0 56 24.9 22.4 111
CASPER MTN. 7900 15.0 18.7 81 20.4 17.4 118
DEADMAN HILL 10220 17.9 18.4 98 19.2 19.7 98
DEER PARK 9700 18.2 -M * 24.7 -M *
LAPRELE CREEK 8320 -M 8.7 * 17.4 13.9 127
RENO HILL 8400 17.2 14.9 117 22.9 21.4 107
ROACH 9700 18.0 18.2 99 22.9 24.4 94
SAND LAKE 10080 40.2 36.3 111 32.3 23.4 139
SOUTH PASS 9040 17.7 17.9 100 21.7 19.5 111
WINDY PEAK 7840 7.0 8.9 79 15.0 11.5 132
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Basin wide percent of average 92 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.5 8.7 87 19.4 17.5 111
DIVIDE PEAK 8800 21.4 20.9 103 27.7 25.9 107
OLD BATTLE 10000 33.4 36.8 91 39.8 33.9 118
SANDSTONE RS 8150 11.9 13.4 89 22.7 21.7 105
WHISKEY PARK 8950 29.4 30.4 98 32.5 32.2 102
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Basin wide percent of average 95 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.2 15.0 109 16.5 17.9 93
BLIND BULL SUM 8650 30.2 27.9 108 23.5 26.2 90
EAST RIM DIVIDE 7930 14.4 15.0 96 15.0 16.9 90
ELKHART PARK G.S. 9400 14.9 14.7 101 16.0 17.7 91
GROS VENTRE SUMMIT 8775 16.5 15.4 108 16.9 17.7 96
KENDALL R.S. 7740 14.5 12.2 119 17.7 17.2 103
LOOMIS PARK 8240 -M 16.4 * 21.4 20.9 103
NEW FORK LAKE 8340 12.6 10.1 125 13.0 16.0 82
SNIDER BASIN 8250 17.4 14.6 119 18.9 16.7 114
SPRING CREEK DIVIDE 9000 31.9 29.5 109 30.4 30.0 102
TRIPLE PEAK 8500 28.2 26.2 108 32.3 34.0 95
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Basin wide percent of average 109 96
LOWER GREEN RIVER
HAMS FORK 7840 11.5 5.8 199 12.5 14.9 85
HEWINTA 9500 10.1 7.8 132 15.5 15.4 102
HICKERSON PARK 9150 3.9 5.3 74 10.5 11.5 92
HOLE-IN-ROCK 9150 6.6 4.8 138 11.0 11.5 97
INDIAN CREEK 9425 32.3 29.9 108 27.2 28.4 96
KELLEY R.S. 8180 16.4 16.7 98 20.2 20.7 98
STEEL CREEK PARK 10100 16.0 18.4 88 18.2 15.1 120
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Basin wide percent of average 110 98
UPPER BEAR RIVER
BUG LAKE 7950 22.0 18.5 119 21.9 21.7 101
HAYDEN FORK 9400 11.6 9.4 125 22.2 21.9 102
KELLEY R.S. 8180 16.4 16.7 98 20.2 20.7 98
LILY LAKE 9050 11.4 11.5 100 19.4 17.0 114
MONTE CRISTO 8960 27.4 28.2 98 28.7 28.9 100
SALT RIVER SUMMIT 7600 15.2 12.7 120 19.5 18.7 105
TRIAL LAKE 9960 20.4 25.4 81 23.7 26.9 89
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Basin wide percent of average 102 100
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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.