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 SUNDAY: MAY 9 , 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 13.6 7.5 184 29.9 25.9 116
COTTONWOOD CREEK 7600 22.7 16.7 137 34.4 29.0 119
GRANITE CREEK 6770 14.7 9.9 150 27.2 27.7 99
GRASSY LAKE 7265 39.5 30.2 132 48.0 43.2 112
GROS VENTRE SUMMIT 8775 -M 11.9 * -M 18.7 *
LEWIS LAKE DIVIDE 7860 38.7 31.7 122 44.8 43.8 103
PHILLIPS BENCH 8200 34.5 27.2 127 36.5 34.7 106
SALT RIVER SUMMIT 7600 12.1 4.8 258 21.9 19.9 111
SNAKE RIVER STATION 6920 12.0 13.6 89 29.4 30.2 98
SPRING CREEK DIVIDE 9000 37.3 27.7 135 34.9 31.7 111
THUMB DIVIDE 7980 17.4 13.0 135 25.7 24.4 106
TOGWOTEE PASS 9580 -M 27.0 * 33.8 32.8 104
TWO OCEAN PLATEAU 9360 40.8 26.9 152 35.8 35.8 101
WILLOW CREEK 8450 31.7 29.7 107 46.4 37.3 125
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Basin wide percent of average 133 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.7 25.4 113 27.7 22.2 125
BLACK BEAR 7950 54.5 38.3 143 52.8 47.7 111
CANYON 7940 13.1 8.5 156 21.4 17.0 126
FISHER CREEK 9100 40.3 38.0 106 42.3 43.5 98
MADISON PLATEAU 7750 -M 21.0 * 36.8 30.9 120
NORTHEAST ENTRANCE 7350 3.3 4.1 79 16.7 14.6 115
PARKER PEAK 9400 26.4 23.2 114 -M 19.2 *
SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137
THUMB DIVIDE 7980 17.4 13.0 135 25.7 24.4 106
TWO OCEAN PLATEAU 9360 40.8 26.9 152 35.8 35.8 101
WHISKEY CREEK 6800 19.0 12.0 159 28.4 25.7 111
WHITE MILL 8700 30.4 25.5 119 28.9 33.8 86
WOLVERINE 7650 3.7 5.3 70 15.2 16.0 95
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Basin wide percent of average 125 109
WIND RIVER
BURROUGHS CREEK 8750 18.2 9.5 192 22.0 20.2 109
COLD SPRINGS 9630 18.7 4.6 407 23.7 14.0 171
DEER PARK 9700 25.7 -M * 32.4 -M *
HOBBS PARK 10100 29.9 17.4 172 27.5 18.4 151
LITTLE WARM 9620 20.0 7.6 264 23.9 17.2 140
SOUTH PASS 9040 24.4 17.2 142 30.0 21.5 140
ST. LAWRENCE ALT 8620 13.5 3.8 363 20.9 13.1 160
TOGWOTEE PASS 9580 -M 27.0 * 33.8 32.8 104
TOWNSEND CREEK 8700 18.9 7.6 249 25.7 16.4 157
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Basin wide percent of average 213 136
BIGHORN BASIN
BALD MTN. 9375 23.7 24.4 98 23.4 22.0 106
BEAR TRAP MEADOW 7900 .9 2.8 30 15.2 11.5 133
BLACKWATER 9780 35.3 25.2 141 29.4 21.5 137
BONE SPRINGS DIV 9350 20.9 17.4 120 22.7 19.2 119
EVENING STAR 9200 36.0 30.7 118 39.9 27.0 148
GRAVE SPRINGS 8550 11.2 11.4 100 17.7 13.5 133
KIRWIN 9550 17.4 10.9 161 20.4 14.1 144
MARQUETTE 8760 16.7 8.1 207 19.4 14.5 134
MIDDLE POWDER 7760 16.9 14.5 117 23.4 15.7 149
OWL CREEK 8975 10.7 2.2 510 -M 8.9 *
POWDER RIVER PASS 9480 11.6 8.1 144 20.7 15.7 132
SHELL CREEK 9580 18.2 17.0 107 19.0 17.0 112
SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137
SYLVAN ROAD 8120 8.2 5.8 144 21.9 19.5 112
TIMBER CREEK 7950 10.4 4.0 258 16.4 11.0 149
YOUNTS PEAK 8350 21.0 16.9 125 21.7 20.2 108
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Basin wide percent of average 129 129
SHOSHONE RIVER
BLACKWATER 9780 35.3 25.2 141 29.4 21.5 137
EVENING STAR 9200 36.0 30.7 118 39.9 27.0 148
KIRWIN 9550 17.4 10.9 161 20.4 14.1 144
MARQUETTE 8760 16.7 8.1 207 19.4 14.5 134
SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137
SYLVAN ROAD 8120 8.2 5.8 144 21.9 19.5 112
YOUNTS PEAK 8350 21.0 16.9 125 21.7 20.2 108
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Basin wide percent of average 134 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 2.8 30 15.2 11.5 133
BIG GOOSE 7990 9.5 -M * 17.7 -M *
BONE SPRINGS DIV 9350 20.9 17.4 120 22.7 19.2 119
BURGESS JUNCTION 7880 11.0 12.2 90 16.7 15.4 110
CLOUD PEAK RESERVOIR 9860 24.2 16.9 145 24.2 18.2 133
DOME LAKE 8880 -M 12.5 * 17.0 17.4 98
GRAVE SPRINGS 8550 11.2 11.4 100 17.7 13.5 133
HANSEN SAWMILL 8760 4.5 5.3 84 16.4 11.0 150
MIDDLE POWDER 7760 16.9 14.5 117 23.4 15.7 149
POWDER RIVER PASS 9480 11.6 8.1 144 20.7 15.7 132
SUCKER CREEK 8880 14.0 12.0 116 20.4 17.7 116
TIE CREEK 6870 -M -M * -M 14.7 *
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Basin wide percent of average 115 126
BELLE FOURCHE
BLIND PARK 6890 .2 6.8 2 18.5 15.0 124
NORTH RAPID CREEK 6130 .3 -M * 16.9 -M *
WARREN PEAK 6520 1.7 6.8 24 -M 11.1 *
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Basin wide percent of average 13 124*
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.7 17.7 95 29.4 28.9 102
DIVIDE PEAK 8800 21.2 15.5 137 31.4 28.4 111
ELK RIVER 8700 12.5 12.0 105 28.4 22.9 125
JOE WRIGHT 10120 23.7 24.2 98 32.8 31.5 104
NORTH FRENCH CREEK 10100 41.3 27.9 149 39.8 29.2 137
OLD BATTLE 10000 39.5 37.5 106 46.2 36.8 126
SOUTH BRUSH CREEK 8400 10.2 8.0 128 25.4 21.4 120
TOWER 10500 57.2 51.0 112 48.8 44.9 109
WEBBER SPRINGS 9200 21.2 22.9 93 33.5 31.5 107
WILLOW CREEK PASS 9540 15.5 12.0 129 15.7 16.2 97
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Basin wide percent of average 114 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 -M 26.7 * -M 24.7 *
CASPER MTN. 7900 13.0 14.1 92 22.7 19.9 115
DEADMAN HILL 10220 22.4 18.9 118 23.7 22.2 108
DEER PARK 9700 25.7 -M * 32.4 -M *
LAPRELE CREEK 8320 .0 4.8 0 20.5 15.6 132
RENO HILL 8400 15.0 10.7 141 26.2 22.9 115
ROACH 9700 -M 17.0 * 25.7 27.0 96
SAND LAKE 10080 46.3 36.3 128 37.5 25.9 146
SOUTH PASS 9040 24.4 17.2 142 30.0 21.5 140
WINDY PEAK 7840 3.2 5.5 58 18.7 13.2 141
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Basin wide percent of average 116 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 2.2 5 22.7 19.2 119
DIVIDE PEAK 8800 21.2 15.5 137 31.4 28.4 111
OLD BATTLE 10000 39.5 37.5 106 46.2 36.8 126
SANDSTONE RS 8150 3.9 5.6 70 25.5 23.9 108
WHISKEY PARK 8950 31.9 27.2 117 37.4 35.3 107
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Basin wide percent of average 110 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.6 11.6 126 18.7 19.2 98
BLIND BULL SUM 8650 32.3 22.7 143 27.4 27.7 99
EAST RIM DIVIDE 7930 14.6 13.7 107 17.7 17.9 100
ELKHART PARK G.S. 9400 15.6 11.7 134 18.9 18.9 100
GROS VENTRE SUMMIT 8775 -M 11.9 * -M 18.7 *
KENDALL R.S. 7740 10.2 4.6 222 19.9 18.2 109
LOOMIS PARK 8240 -M 13.0 * 24.4 22.2 110
NEW FORK LAKE 8340 11.1 7.5 148 15.7 16.9 93
SNIDER BASIN 8250 18.5 10.5 177 22.4 17.9 126
SPRING CREEK DIVIDE 9000 37.3 27.7 135 34.9 31.7 111
TRIPLE PEAK 8500 30.9 22.9 135 37.7 36.0 105
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Basin wide percent of average 140 106
LOWER GREEN RIVER
HAMS FORK 7840 7.5 2.5 300 17.9 15.7 114
HEWINTA 9500 12.0 2.3 522 18.9 17.0 112
HICKERSON PARK 9150 5.0 1.7 313 14.4 13.1 110
HOLE-IN-ROCK 9150 7.8 1.4 600 14.7 13.1 113
INDIAN CREEK 9425 37.8 26.7 142 33.3 30.0 112
KELLEY R.S. 8180 15.5 12.2 128 23.7 22.0 108
STEEL CREEK PARK 10100 21.4 17.7 122 22.7 17.2 133
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Basin wide percent of average 167 114
UPPER BEAR RIVER
BUG LAKE 7950 24.9 12.7 197 28.4 23.2 123
HAYDEN FORK 9400 13.6 3.3 413 27.7 23.9 116
KELLEY R.S. 8180 15.5 12.2 128 23.7 22.0 108
LILY LAKE 9050 12.4 7.0 176 23.7 18.9 125
MONTE CRISTO 8960 40.0 23.9 169 36.5 31.2 117
SALT RIVER SUMMIT 7600 12.1 4.8 258 21.9 19.9 111
TRIAL LAKE 9960 27.7 22.4 125 30.2 29.2 104
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Basin wide percent of average 170 115
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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.