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 FRIDAY: APRIL 30 , 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 17.4 11.1 157 29.2 25.2 116
COTTONWOOD CREEK 7600 23.9 20.4 118 32.0 28.2 114
GRANITE CREEK 6770 18.2 13.4 137 26.4 26.9 99
GRASSY LAKE 7265 41.8 34.3 123 45.0 41.8 108
GROS VENTRE SUMMIT 8775 17.2 14.1 122 18.0 18.2 100
LEWIS LAKE DIVIDE 7860 39.8 34.7 115 42.8 42.5 101
PHILLIPS BENCH 8200 37.5 29.7 127 35.4 33.7 106
SALT RIVER SUMMIT 7600 14.7 11.0 134 20.9 19.2 109
SNAKE RIVER STATION 6920 16.2 16.7 98 28.2 29.4 96
SPRING CREEK DIVIDE 9000 35.3 29.7 120 32.8 30.9 107
THUMB DIVIDE 7980 20.9 15.4 137 24.7 23.7 105
TOGWOTEE PASS 9580 -M 28.4 * 32.5 31.9 102
TWO OCEAN PLATEAU 9360 39.3 27.7 143 34.7 34.7 100
WILLOW CREEK 8450 33.2 31.9 104 43.2 36.2 120
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Basin wide percent of average 123 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.4 26.0 109 27.2 21.2 128
BLACK BEAR 7950 -M 39.9 * 49.3 46.4 107
CANYON 7940 16.2 11.1 146 20.9 16.4 128
FISHER CREEK 9100 -M 38.8 * 41.0 42.2 98
MADISON PLATEAU 7750 -M 24.0 * 34.7 29.9 117
NORTHEAST ENTRANCE 7350 7.0 6.1 114 16.2 14.0 116
PARKER PEAK 9400 27.7 23.7 117 -M 18.2 *
SYLVAN LAKE 8420 26.0 23.9 109 31.0 22.4 140
THUMB DIVIDE 7980 20.9 15.4 137 24.7 23.7 105
TWO OCEAN PLATEAU 9360 39.3 27.7 143 34.7 34.7 100
WHISKEY CREEK 6800 20.7 15.5 135 26.5 24.9 107
WHITE MILL 8700 30.4 26.4 116 28.0 32.5 87
WOLVERINE 7650 9.5 8.5 114 15.0 15.2 99
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Basin wide percent of average 123 108
WIND RIVER
BURROUGHS CREEK 8750 19.0 13.1 146 21.2 19.4 109
COLD SPRINGS 9630 -M 7.0 * -M 13.1 *
DEER PARK 9700 25.7 -M * 31.4 -M *
HOBBS PARK 10100 28.7 18.0 159 25.7 17.2 149
LITTLE WARM 9620 -M 10.6 * -M 16.4 *
SOUTH PASS 9040 24.9 18.2 138 28.9 20.5 141
ST. LAWRENCE ALT 8620 14.5 5.6 259 20.2 12.5 161
TOGWOTEE PASS 9580 -M 28.4 * 32.5 31.9 102
TOWNSEND CREEK 8700 19.5 9.6 204 24.7 15.5 160
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Basin wide percent of average 166 131
BIGHORN BASIN
BALD MTN. 9375 22.2 24.0 93 21.7 20.7 105
BEAR TRAP MEADOW 7900 2.0 4.5 46 13.7 10.6 130
BLACKWATER 9780 35.0 25.7 137 28.7 20.7 139
BONE SPRINGS DIV 9350 20.5 18.4 112 21.4 18.2 118
EVENING STAR 9200 37.2 30.9 121 39.3 25.9 152
GRAVE SPRINGS 8550 11.5 11.6 99 16.4 12.5 132
KIRWIN 9550 16.7 11.7 142 19.2 13.4 144
MARQUETTE 8760 17.4 8.7 199 18.5 13.5 139
MIDDLE POWDER 7760 17.0 14.9 115 21.5 14.9 146
OWL CREEK 8975 -M 3.5 * -M 8.1 *
POWDER RIVER PASS 9480 13.4 10.6 126 18.9 14.6 130
SHELL CREEK 9580 18.0 17.0 106 18.0 16.0 114
SYLVAN LAKE 8420 26.0 23.9 109 31.0 22.4 140
SYLVAN ROAD 8120 12.6 8.1 156 21.4 18.7 115
TIMBER CREEK 7950 10.5 6.1 171 15.0 10.0 150
YOUNTS PEAK 8350 21.9 18.4 119 21.2 19.4 110
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Basin wide percent of average 121 130
SHOSHONE RIVER
BLACKWATER 9780 35.0 25.7 137 28.7 20.7 139
EVENING STAR 9200 37.2 30.9 121 39.3 25.9 152
KIRWIN 9550 16.7 11.7 142 19.2 13.4 144
MARQUETTE 8760 17.4 8.7 199 18.5 13.5 139
SYLVAN LAKE 8420 26.0 23.9 109 31.0 22.4 140
SYLVAN ROAD 8120 12.6 8.1 156 21.4 18.7 115
YOUNTS PEAK 8350 21.9 18.4 119 21.2 19.4 110
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Basin wide percent of average 131 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.0 4.5 46 13.7 10.6 130
BIG GOOSE 7990 10.7 -M * 16.7 -M *
BONE SPRINGS DIV 9350 20.5 18.4 112 21.4 18.2 118
BURGESS JUNCTION 7880 11.6 13.5 86 15.5 14.5 108
CLOUD PEAK RESERVOIR 9860 23.5 17.7 133 22.5 17.0 133
DOME LAKE 8880 -M 15.0 * 16.2 16.4 100
GRAVE SPRINGS 8550 11.5 11.6 99 16.4 12.5 132
HANSEN SAWMILL 8760 6.8 7.0 98 14.7 10.4 143
MIDDLE POWDER 7760 17.0 14.9 115 21.5 14.9 146
POWDER RIVER PASS 9480 13.4 10.6 126 18.9 14.6 130
SUCKER CREEK 8880 14.7 13.9 107 19.0 16.4 116
TIE CREEK 6870 -M -M * -M 13.9 *
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Basin wide percent of average 109 124
BELLE FOURCHE
BLIND PARK 6890 .0 9.9 0 17.9 13.7 130
NORTH RAPID CREEK 6130 1.4 -M * 16.4 -M *
WARREN PEAK 6520 7.8 9.9 80 13.1 10.4 128
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Basin wide percent of average 40 129
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.7 22.4 75 27.2 28.0 97
DIVIDE PEAK 8800 21.5 19.5 111 29.7 27.2 109
ELK RIVER 8700 14.7 16.5 90 26.5 22.2 120
JOE WRIGHT 10120 23.2 24.7 94 30.9 30.2 102
NORTH FRENCH CREEK 10100 38.3 29.4 130 36.8 27.9 132
OLD BATTLE 10000 36.5 38.2 96 43.0 35.7 121
SOUTH BRUSH CREEK 8400 9.5 10.9 88 22.9 20.5 112
TOWER 10500 54.7 51.0 108 46.0 43.0 107
WEBBER SPRINGS 9200 21.4 26.2 82 31.4 30.5 103
WILLOW CREEK PASS 9540 15.0 13.5 111 14.5 15.5 95
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Basin wide percent of average 100 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.7 29.0 82 29.7 23.7 125
CASPER MTN. 7900 14.2 17.9 80 21.2 18.7 114
DEADMAN HILL 10220 20.7 19.2 109 22.2 21.0 106
DEER PARK 9700 25.7 -M * 31.4 -M *
LAPRELE CREEK 8320 .0 6.6 0 19.7 14.7 134
RENO HILL 8400 16.2 13.6 120 24.4 22.4 110
ROACH 9700 19.9 18.2 109 24.9 25.7 97
SAND LAKE 10080 45.8 37.3 123 36.8 24.7 149
SOUTH PASS 9040 24.9 18.2 138 28.9 20.5 141
WINDY PEAK 7840 7.1 8.0 89 17.4 12.2 143
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Basin wide percent of average 103 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 4.8 5.3 93 21.7 18.4 118
DIVIDE PEAK 8800 21.5 19.5 111 29.7 27.2 109
OLD BATTLE 10000 36.5 38.2 96 43.0 35.7 121
SANDSTONE RS 8150 9.0 10.2 88 24.4 22.9 107
WHISKEY PARK 8950 30.7 29.7 104 34.9 33.9 103
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Basin wide percent of average 100 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.7 14.0 120 18.0 18.5 98
BLIND BULL SUM 8650 32.0 23.4 138 25.9 26.9 97
EAST RIM DIVIDE 7930 15.2 15.0 103 16.9 17.4 98
ELKHART PARK G.S. 9400 16.0 14.1 113 17.7 18.2 98
GROS VENTRE SUMMIT 8775 17.2 14.1 122 18.0 18.2 100
KENDALL R.S. 7740 13.2 10.9 123 18.9 17.7 108
LOOMIS PARK 8240 -M 15.4 * 23.2 21.4 109
NEW FORK LAKE 8340 13.0 9.4 140 14.7 16.4 90
SNIDER BASIN 8250 20.7 13.2 157 21.2 17.2 123
SPRING CREEK DIVIDE 9000 35.3 29.7 120 32.8 30.9 107
TRIPLE PEAK 8500 31.9 25.2 127 35.7 34.9 103
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Basin wide percent of average 126 103
LOWER GREEN RIVER
HAMS FORK 7840 11.2 5.8 194 16.2 15.2 106
HEWINTA 9500 13.0 5.6 231 17.9 16.2 110
HICKERSON PARK 9150 6.0 3.3 188 13.5 12.4 110
HOLE-IN-ROCK 9150 9.2 2.7 354 14.0 12.4 114
INDIAN CREEK 9425 36.0 29.0 125 30.9 29.2 106
KELLEY R.S. 8180 17.2 15.2 114 22.5 21.4 106
STEEL CREEK PARK 10100 19.7 18.9 104 21.4 16.0 134
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Basin wide percent of average 140 112
UPPER BEAR RIVER
BUG LAKE 7950 25.2 16.4 154 26.4 22.7 117
HAYDEN FORK 9400 13.9 7.0 200 25.2 22.9 111
KELLEY R.S. 8180 17.2 15.2 114 22.5 21.4 106
LILY LAKE 9050 13.5 9.0 150 22.4 17.9 125
MONTE CRISTO 8960 35.9 26.4 136 33.7 30.2 112
SALT RIVER SUMMIT 7600 14.7 11.0 134 20.9 19.2 109
TRIAL LAKE 9960 24.9 24.2 103 27.7 28.2 98
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Basin wide percent of average 134 110
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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.