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: MAY 2 , 2014
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 17.2 8.9 193 28.8 22.9 126
BLACK BEAR 8170 46.0 37.4 123 45.7 41.8 109
BLIND BULL SUM 8650 38.0 23.0 165 24.7 21.4 115
COTTONWOOD CREEK 7670 26.3 15.0 175 37.2 27.6 135
EAST RIM DIVIDE 7930 10.4 8.2 127 16.6 13.0 128
GRAND TARGHEE 9260 54.6 45.1 121 40.6 34.8 117
GRANITE CREEK 6770 18.7 8.1 231 26.2 21.4 122
GRASSY LAKE 7265 39.1 28.7 136 44.1 39.4 112
GROS VENTRE SUMMIT 8750 14.3 11.5 124 15.8 14.7 107
GUNSIGHT PASS 9820 20.5 12.3 167 20.8 16.1 129
LEWIS LAKE DIVIDE 7850 42.9 29.9 143 44.2 38.6 115
PHILLIPS BENCH 8200 36.8 25.1 147 38.4 30.7 125
SALT RIVER SUMMIT 7760 13.1 7.8 168 20.8 18.4 113
SNAKE RIVER STATION 6920 13.0 6.8 191 28.4 24.8 115
SPRING CREEK DIVIDE 9000 38.3 24.3 158 34.6 26.3 132
THUMB DIVIDE 7980 19.5 11.9 164 22.1 21.0 105
TOGWOTEE PASS 9580 34.7 24.8 140 36.1 27.4 132
TWO OCEAN PLATEAU 9240 39.7 29.8 133 37.7 30.2 125
WILLOW CREEK 8380 39.5 22.6 175 44.7 37.7 119
YOUNTS PEAK 8350 -M 15.6 * -M 17.7 *
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Basin Index (%) 148 120
MADISON-GALLATIN
BLACK BEAR 8170 46.0 37.4 123 45.7 41.8 109
CANYON 7870 14.8 10.0 148 19.2 18.1 106
MADISON PLATEAU 7750 27.0 21.2 127 29.1 29.0 100
WEST YELLOWSTONE 6700 2.9 1.2 242 18.7 16.0 117
WHISKEY CREEK 6800 17.1 14.2 120 24.7 22.4 110
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Basin Index (%) 128 108
YELLOWSTONE
BEARTOOTH LAKE 9360 34.6 22.7 152 33.3 22.0 151
BURNT MTN 5880 4.2 .0 * 22.9 16.0 143
CANYON 7870 14.8 10.0 148 19.2 18.1 106
COLE CREEK 7850 25.4 16.6 153 19.6 16.5 119
EVENING STAR 9200 42.5 24.8 171 45.0 30.5 148
FISHER CREEK 9100 48.5 32.6 149 44.6 35.2 127
NORTHEAST ENTRANCE 7350 10.5 2.4 438 18.0 13.8 130
PARKER PEAK 9400 38.0 21.2 179 33.7 20.1 168
SYLVAN LAKE 8420 25.2 19.5 129 33.4 25.2 133
THUMB DIVIDE 7980 19.5 11.9 164 22.1 21.0 105
TWO OCEAN PLATEAU 9240 39.7 29.8 133 37.7 30.2 125
WHITE MILL 8700 36.3 23.8 153 32.8 26.4 124
WOLVERINE 7650 12.3 1.9 647 20.2 13.8 146
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Basin Index (%) 162 132
WIND RIVER
BURROUGHS CREEK 8750 -M 12.8 * -M 18.0 *
CASTLE CREEK 8400 4.9 -M * 13.3 -M *
COLD SPRINGS 9630 5.8 1.2 483 14.3 12.5 114
DEER PARK 9700 17.7 15.8 112 21.7 23.5 92
HOBBS PARK 10100 15.4 16.0 96 15.9 16.8 95
KIRWIN 9550 19.2 10.5 183 20.0 13.9 144
LITTLE WARM 9370 12.8 8.6 149 18.5 15.4 120
OWL CREEK 8975 1.0 .8 125 8.8 8.0 110
SOUTH PASS 9040 14.8 14.7 101 16.9 20.4 83
ST. LAWRENCE ALT 8620 .0 2.1 0 10.4 11.6 90
TOGWOTEE PASS 9580 34.7 24.8 140 36.1 27.4 132
TOWNSEND CREEK 8700 5.0 7.3 68 11.1 15.0 74
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Basin Index (%) 124 106
BIGHORN BASIN
BALD MTN. 9380 29.9 20.5 146 23.4 19.8 118
BEAR TRAP MEADOW 8200 7.3 .7 1043 12.8 10.7 120
BONE SPRINGS DIV 9350 25.5 16.5 155 20.5 18.3 112
GRAVE SPRINGS 8550 13.0 9.5 137 14.5 13.0 112
KIRWIN 9550 19.2 10.5 183 20.0 13.9 144
MARQUETTE 8760 15.8 -M * 15.6 -M *
MIDDLE POWDER 7760 18.9 11.5 164 16.7 14.2 118
OWL CREEK 8975 1.0 .8 125 8.8 8.0 110
POWDER RIVER PASS 9480 14.7 9.2 160 18.7 15.2 123
SHELL CREEK 9580 21.8 15.9 137 19.5 16.4 119
TIMBER CREEK 7950 .0 3.0 0 11.1 10.1 110
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Basin Index (%) 154 119
SHOSHONE RIVER
BLACKWATER 9780 36.0 25.5 141 33.4 23.6 142
EVENING STAR 9200 42.5 24.8 171 45.0 30.5 148
MARQUETTE 8760 15.8 -M * 15.6 -M *
SYLVAN ROAD 7120 6.4 5.2 123 24.6 18.6 132
YOUNTS PEAK 8350 -M 15.6 * -M 17.7 *
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Basin Index (%) 153 142
POWDER RIVER
BEAR TRAP MEADOW 8200 7.3 .7 1043 12.8 10.7 120
CLOUD PEAK RESERVOIR 9860 24.5 16.4 149 23.1 16.8 138
GRAVE SPRINGS 8550 13.0 9.5 137 14.5 13.0 112
HANSEN SAWMILL 8360 7.9 2.1 376 14.5 11.0 132
MIDDLE POWDER 7760 18.9 11.5 164 16.7 14.2 118
POWDER RIVER PASS 9480 14.7 9.2 160 18.7 15.2 123
SOLDIER PARK 8720 12.3 -M * 14.5 -M *
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Basin Index (%) 175 124
TONGUE RIVER
BIG GOOSE 7990 13.0 9.2 141 18.0 14.2 127
BONE SPRINGS DIV 9350 25.5 16.5 155 20.5 18.3 112
BURGESS JUNCTION 7880 18.3 12.0 152 19.6 14.9 132
DOME LAKE 8880 18.1 11.4 159 18.6 16.6 112
LITTLE GOOSE 8870 15.4 -M * 20.6 -M *
SUCKER CREEK 8880 19.0 12.0 158 23.5 17.5 134
TIE CREEK 6870 7.0 2.6 269 18.1 14.6 124
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Basin Index (%) 158 123
BELLE FOURCHE
COLE CANYON 5910 4.0 .4 1000* 15.9 12.1 131
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Basin Index (%) 1000* 131
CHEYENNE RIVER BASIN
BLIND PARK 6890 2.7 .3 900* 19.3 14.5 133
NORTH RAPID CREEK 6130 3.7 .7 529 18.7 12.4 151
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Basin Index (%) 640 141
UPPER N. PLATTE
ARAPAHO RIDGE 10960 29.8 22.3 134 30.9 26.3 117
BLACKHALL MTN 9820 39.6 -M * -M -M *
COLUMBINE 9160 31.0 17.8 174 -M 28.7 *
DIVIDE PEAK 8880 15.7 18.0 87 25.4 24.4 104
JOE WRIGHT 10120 29.1 23.1 126 37.6 30.0 125
LAPRELE CREEK 8375 6.5 5.8 112 14.4 15.1 95
MED BOW 10500 -M -M * 44.9 -M *
NORTH FRENCH CREEK 10130 40.5 32.8 123 39.6 30.8 129
NEVER SUMMER 10280 28.9 21.8 133 23.8 -M *
OLD BATTLE 10000 35.9 34.7 103 40.2 39.3 102
RAWAH 9020 9.7 5.6 173 20.5 17.3 118
SAGE CREEK BASIN 7850 .8 1.1 73* 14.0 16.2 86
SAND LAKE 10050 37.2 31.4 118 37.1 29.2 127
SOUTH BRUSH CREEK 8440 8.5 8.8 97 18.3 17.9 102
TOWER 10500 54.7 50.2 109 56.0 44.9 125
WEBBER SPRINGS 9250 22.9 21.5 107 31.2 30.1 104
WILLOW CREEK PASS 9540 17.0 14.3 119 17.3 15.8 109
ZIRKEL 9340 37.6 20.9 180 -M 31.1 *
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Basin Index (%) 123 113
SWEETWATER
DEER PARK 9700 17.7 15.8 112 21.7 23.5 92
LARSEN CREEK 9000 7.2 8.9 81 16.6 -M *
SOUTH PASS 9040 14.8 14.7 101 16.9 20.4 83
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Basin Index (%) 101 88
LOWER N. PLATTE
CASPER MTN. 7900 18.3 13.0 141 19.0 18.1 105
LAPRELE CREEK 8375 6.5 5.8 112 14.4 15.1 95
RENO HILL 8400 19.6 12.4 158 24.9 19.0 131
WINDY PEAK 7900 6.7 3.7 181 14.6 13.0 112
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Basin Index (%) 146 112
LARAMIE RIVER
BROOKLYN LAKE 10240 31.2 23.3 134 33.9 24.8 137
CINNABAR PARK 9574 24.3 19.2 127 32.4 27.0 120
CROW CREEK 8330 1.4 .0 * 14.4 13.5 107
DEADMAN HILL 10220 27.5 19.1 144 27.1 20.8 130
RAWAH 9020 9.7 5.6 173 20.5 17.3 118
ROACH 9700 20.8 17.1 122 26.9 22.4 120
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Basin Index (%) 136 123
S. PLATTE
BLACK MOUNTAIN 8920 10.8 -M * -M -M *
CROW CREEK 8330 1.4 .0 * 14.4 13.5 107
DEADMAN HILL 10220 27.5 19.1 144 27.1 20.8 130
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Basin Index (%) 151* 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 * 19.1 17.2 111
DIVIDE PEAK 8880 15.7 18.0 87 25.4 24.4 104
ELK RIVER 8700 15.8 12.9 122 24.8 22.8 109
LITTLE SNAKE RIVER 8915 26.2 22.1 119 37.3 32.9 113
OLD BATTLE 10000 35.9 34.7 103 40.2 39.3 102
SAGE CREEK BASIN 7850 .8 1.1 73* 14.0 16.2 86
SANDSTONE RS 8150 4.5 5.6 80 19.4 20.8 93
WHISKEY PARK 8950 38.0 26.6 143 43.1 31.6 136
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Basin Index (%) 113 109
UPPER GREEN RIVER
BIG SANDY OPENING 9080 14.0 10.2 137 15.6 15.2 103
BLIND BULL SUM 8650 38.0 23.0 165 24.7 21.4 115
EAST RIM DIVIDE 7930 10.4 8.2 127 16.6 13.0 128
ELKHART PARK G.S. 9400 18.1 11.1 163 18.3 15.1 121
GROS VENTRE SUMMIT 8750 14.3 11.5 124 15.8 14.7 107
GUNSIGHT PASS 9820 20.5 12.3 167 20.8 16.1 129
KENDALL R.S. 7740 15.7 3.8 413 23.9 15.6 153
LOOMIS PARK 8240 21.6 10.8 200 26.4 19.0 139
NEW FORK LAKE 8340 11.3 6.3 179 14.0 12.2 115
POCKET CREEK 9360 12.2 -M * 13.5 -M *
SNIDER BASIN 8060 11.9 9.1 131 20.5 15.7 131
SPRING CREEK DIVIDE 9000 38.3 24.3 158 34.6 26.3 132
TRIPLE PEAK 8500 32.3 17.1 189 39.2 28.0 140
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Basin Index (%) 167 127
LOWER GREEN RIVER
BLACKS FORK JCT 8870 3.3 -M * 15.2 -M *
BUCK PASTURE 9700 11.7 -M * 19.7 -M *
EF BLACKS FORK GS 9360 5.9 -M * 11.6 -M *
HAMS FORK 7840 7.9 2.5 316 15.1 13.2 114
HEWINTA 9519 6.5 4.6 141 16.3 16.3 100
HICKERSON PARK 9145 .2 3.9 5 9.6 12.1 79
HOLE-IN-ROCK 9150 .0 2.2 0 11.0 11.6 95
INDIAN CREEK 9425 32.2 22.8 141 28.5 25.1 114
KELLEY R.S. 8180 14.8 11.2 132 21.8 20.2 108
SPIRIT LK 10235 8.3 -M * 15.8 -M *
STEEL CREEK PARK 10200 21.9 17.2 127 18.6 19.2 97
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Basin Index (%) 130 103
UPPER BEAR RIVER
BEAR RIVER RS 8777 .0 -M * 14.3 -M *
BUG LAKE 7950 19.8 14.7 135 22.3 21.8 102
BURTS MILLER RANCH 8000 .2 -M * 7.9 -M *
CHALK CREEK #1 8993 20.5 24.0 85 26.0 28.6 91
HAYDEN FORK 9212 9.3 9.1 102 24.1 23.9 101
KELLEY R.S. 8180 14.8 11.2 132 21.8 20.2 108
LILY LAKE 9156 10.5 10.0 105 17.4 19.6 89
MONTE CRISTO 8960 23.5 26.2 90 28.2 29.3 96
SALT RIVER SUMMIT 7760 13.1 7.8 168 20.8 18.4 113
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Basin Index (%) 108 99
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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.
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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.