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: MAY 1 , 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 18.3 9.3 197 28.8 22.8 126
BLACK BEAR 8170 45.9 37.4 123 45.7 41.7 110
BLIND BULL SUM 8650 38.3 23.1 166 24.7 21.3 116
COTTONWOOD CREEK 7670 28.2 15.3 184 37.2 27.4 136
EAST RIM DIVIDE 7930 11.6 8.2 141 16.6 12.9 129
GRAND TARGHEE 9260 55.5 44.8 124 -M 34.6 *
GRANITE CREEK 6770 19.4 8.3 234 26.2 21.3 123
GRASSY LAKE 7265 39.5 29.1 136 44.1 39.3 112
GROS VENTRE SUMMIT 8750 14.3 11.6 123 15.8 14.6 108
GUNSIGHT PASS 9820 20.7 12.5 166 20.6 16.0 129
LEWIS LAKE DIVIDE 7850 43.1 30.1 143 44.1 38.5 115
PHILLIPS BENCH 8200 36.7 25.4 144 38.4 30.7 125
SALT RIVER SUMMIT 7760 13.9 7.9 176 20.7 18.4 112
SNAKE RIVER STATION 6920 15.1 7.4 204 28.4 24.8 115
SPRING CREEK DIVIDE 9000 38.4 24.3 158 34.6 26.2 132
THUMB DIVIDE 7980 20.2 12.4 163 22.0 20.9 105
TOGWOTEE PASS 9580 35.2 24.7 143 36.1 27.2 133
TWO OCEAN PLATEAU 9240 39.7 29.7 134 37.7 30.1 125
WILLOW CREEK 8380 40.3 23.0 175 44.7 37.6 119
YOUNTS PEAK 8350 -M 15.5 * -M 17.6 *
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Basin Index (%) 149 120
MADISON-GALLATIN
BLACK BEAR 8170 45.9 37.4 123 45.7 41.7 110
CANYON 7870 15.4 10.4 148 19.2 18.0 107
MADISON PLATEAU 7750 27.4 21.3 129 29.1 28.9 101
WEST YELLOWSTONE 6700 4.2 1.8 233 18.7 16.0 117
WHISKEY CREEK 6800 17.4 14.6 119 24.7 22.3 111
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Basin Index (%) 129 108
YELLOWSTONE
BEARTOOTH LAKE 9360 34.9 22.8 153 33.2 21.9 152
BURNT MTN 5880 5.2 .0 * 22.7 15.9 143
CANYON 7870 15.4 10.4 148 19.2 18.0 107
COLE CREEK 7850 25.7 16.6 155 19.6 16.4 120
EVENING STAR 9200 42.5 24.9 171 44.9 30.4 148
FISHER CREEK 9100 47.9 32.7 146 44.5 35.1 127
NORTHEAST ENTRANCE 7350 11.4 3.0 380 18.0 13.8 130
PARKER PEAK 9400 37.7 21.3 177 33.7 20.0 168
SYLVAN LAKE 8420 25.4 19.8 128 33.4 25.1 133
THUMB DIVIDE 7980 20.2 12.4 163 22.0 20.9 105
TWO OCEAN PLATEAU 9240 39.7 29.7 134 37.7 30.1 125
WHITE MILL 8700 36.5 23.8 153 32.8 26.3 125
WOLVERINE 7650 12.7 2.5 508 20.0 13.7 146
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Basin Index (%) 162 133
WIND RIVER
BURROUGHS CREEK 8750 -M 12.9 * -M 17.9 *
CASTLE CREEK 8400 5.9 -M * 13.3 -M *
COLD SPRINGS 9630 6.2 1.3 477 14.3 12.4 115
DEER PARK 9700 18.2 16.0 114 21.7 23.4 93
HOBBS PARK 10100 16.3 16.0 102 15.7 16.6 95
KIRWIN 9550 19.2 10.4 185 19.9 13.8 144
LITTLE WARM 9370 13.4 8.7 154 18.4 15.4 119
OWL CREEK 8975 1.8 1.0 180 8.8 7.9 111
SOUTH PASS 9040 15.2 14.9 102 16.8 20.3 83
ST. LAWRENCE ALT 8620 .0 2.5 0 10.5 11.5 91
TOGWOTEE PASS 9580 35.2 24.7 143 36.1 27.2 133
TOWNSEND CREEK 8700 5.3 7.5 71 10.9 14.9 73
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Basin Index (%) 127 106
BIGHORN BASIN
BALD MTN. 9380 30.0 20.5 146 23.3 19.7 118
BEAR TRAP MEADOW 8200 8.0 .9 889 12.8 10.6 121
BONE SPRINGS DIV 9350 25.4 16.5 154 20.2 18.2 111
GRAVE SPRINGS 8550 13.3 9.4 141 14.4 12.8 112
KIRWIN 9550 19.2 10.4 185 19.9 13.8 144
MARQUETTE 8760 15.7 -M * 15.5 -M *
MIDDLE POWDER 7760 18.9 11.6 163 16.6 14.1 118
OWL CREEK 8975 1.8 1.0 180 8.8 7.9 111
POWDER RIVER PASS 9480 15.8 9.4 168 18.6 15.1 123
SHELL CREEK 9580 22.1 15.9 139 19.5 16.3 120
TIMBER CREEK 7950 1.4 3.1 45 11.1 10.0 111
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Basin Index (%) 158 119
SHOSHONE RIVER
BLACKWATER 9780 36.0 25.3 142 33.4 23.4 143
EVENING STAR 9200 42.5 24.9 171 44.9 30.4 148
MARQUETTE 8760 15.7 -M * 15.5 -M *
SYLVAN ROAD 7120 7.9 5.8 136 24.6 18.6 132
YOUNTS PEAK 8350 -M 15.5 * -M 17.6 *
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Basin Index (%) 154 142
POWDER RIVER
BEAR TRAP MEADOW 8200 8.0 .9 889 12.8 10.6 121
CLOUD PEAK RESERVOIR 9860 24.6 16.5 149 22.7 16.6 137
GRAVE SPRINGS 8550 13.3 9.4 141 14.4 12.8 112
HANSEN SAWMILL 8360 8.4 2.5 336 14.3 10.8 132
MIDDLE POWDER 7760 18.9 11.6 163 16.6 14.1 118
POWDER RIVER PASS 9480 15.8 9.4 168 18.6 15.1 123
SOLDIER PARK 8720 12.9 -M * 14.5 -M *
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Basin Index (%) 177 124
TONGUE RIVER
BIG GOOSE 7990 13.2 9.2 143 17.8 14.0 127
BONE SPRINGS DIV 9350 25.4 16.5 154 20.2 18.2 111
BURGESS JUNCTION 7880 18.4 12.1 152 19.5 14.8 132
DOME LAKE 8880 18.0 11.4 158 18.4 16.4 112
LITTLE GOOSE 8870 15.6 -M * 20.5 -M *
SUCKER CREEK 8880 19.2 12.2 157 23.4 17.3 135
TIE CREEK 6870 7.3 2.7 270 18.2 14.3 127
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Basin Index (%) 158 124
BELLE FOURCHE
COLE CANYON 5910 4.0 .3 1333* 15.8 11.8 134
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Basin Index (%) 1333* 134
CHEYENNE RIVER BASIN
BLIND PARK 6890 3.0 .8 375 19.3 14.3 135
NORTH RAPID CREEK 6130 3.8 .8 475 18.7 12.2 153
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Basin Index (%) 425 143
UPPER N. PLATTE
ARAPAHO RIDGE 10960 29.8 22.3 134 30.6 26.2 117
BLACKHALL MTN 9820 39.6 -M * -M -M *
COLUMBINE 9160 31.3 18.2 172 -M 28.5 *
DIVIDE PEAK 8880 15.7 18.0 87 25.3 24.3 104
JOE WRIGHT 10120 28.9 23.3 124 37.3 29.8 125
LAPRELE CREEK 8375 6.7 6.1 110 14.3 15.0 95
MED BOW 10500 -M -M * 43.8 -M *
NORTH FRENCH CREEK 10130 40.6 32.9 123 39.6 30.7 129
NEVER SUMMER 10280 28.9 21.8 133 23.7 -M *
OLD BATTLE 10000 35.9 34.7 103 39.8 39.2 102
RAWAH 9020 10.0 6.1 164 20.4 17.2 119
SAGE CREEK BASIN 7850 1.8 1.1 164* 14.0 16.1 87
SAND LAKE 10050 37.0 31.4 118 37.0 29.0 128
SOUTH BRUSH CREEK 8440 8.8 9.2 96 18.3 17.8 103
TOWER 10500 54.8 50.0 110 55.9 44.7 125
WEBBER SPRINGS 9250 22.7 21.7 105 31.2 29.9 104
WILLOW CREEK PASS 9540 16.7 14.2 118 17.4 15.8 110
ZIRKEL 9340 37.7 21.0 180 -M 31.0 *
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Basin Index (%) 123 114
SWEETWATER
DEER PARK 9700 18.2 16.0 114 21.7 23.4 93
LARSEN CREEK 9000 7.8 9.2 85 16.5 -M *
SOUTH PASS 9040 15.2 14.9 102 16.8 20.3 83
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Basin Index (%) 103 88
LOWER N. PLATTE
CASPER MTN. 7900 18.2 13.3 137 18.8 17.9 105
LAPRELE CREEK 8375 6.7 6.1 110 14.3 15.0 95
RENO HILL 8400 19.7 12.6 156 24.8 18.9 131
WINDY PEAK 7900 6.9 4.0 172 14.6 13.0 112
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Basin Index (%) 143 112
LARAMIE RIVER
BROOKLYN LAKE 10240 31.2 23.3 134 33.8 24.7 137
CINNABAR PARK 9574 24.4 19.4 126 32.5 26.9 121
CROW CREEK 8330 1.6 .0 * 14.4 13.4 107
DEADMAN HILL 10220 27.4 19.0 144 27.0 20.6 131
RAWAH 9020 10.0 6.1 164 20.4 17.2 119
ROACH 9700 20.9 17.2 122 26.8 22.2 121
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Basin Index (%) 136 124
S. PLATTE
BLACK MOUNTAIN 8920 10.5 -M * -M -M *
CROW CREEK 8330 1.6 .0 * 14.4 13.4 107
DEADMAN HILL 10220 27.4 19.0 144 27.0 20.6 131
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Basin Index (%) 153* 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 * 19.1 17.1 112
DIVIDE PEAK 8880 15.7 18.0 87 25.3 24.3 104
ELK RIVER 8700 15.9 13.2 120 24.7 22.7 109
LITTLE SNAKE RIVER 8915 26.2 22.3 117 37.3 32.7 114
OLD BATTLE 10000 35.9 34.7 103 39.8 39.2 102
SAGE CREEK BASIN 7850 1.8 1.1 164* 14.0 16.1 87
SANDSTONE RS 8150 5.0 5.9 85 19.3 20.8 93
WHISKEY PARK 8950 37.9 26.5 143 43.2 31.5 137
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Basin Index (%) 114 109
UPPER GREEN RIVER
BIG SANDY OPENING 9080 14.4 10.6 136 15.6 15.1 103
BLIND BULL SUM 8650 38.3 23.1 166 24.7 21.3 116
EAST RIM DIVIDE 7930 11.6 8.2 141 16.6 12.9 129
ELKHART PARK G.S. 9400 18.4 11.3 163 18.3 15.0 122
GROS VENTRE SUMMIT 8750 14.3 11.6 123 15.8 14.6 108
GUNSIGHT PASS 9820 20.7 12.5 166 20.6 16.0 129
KENDALL R.S. 7740 16.5 4.3 384 23.8 15.5 154
LOOMIS PARK 8240 22.9 11.0 208 26.3 18.9 139
NEW FORK LAKE 8340 12.1 6.5 186 14.0 12.1 116
POCKET CREEK 9360 12.5 -M * 13.5 -M *
SNIDER BASIN 8060 12.8 9.4 136 20.4 15.6 131
SPRING CREEK DIVIDE 9000 38.4 24.3 158 34.6 26.2 132
TRIPLE PEAK 8500 32.7 17.5 187 39.2 27.9 141
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Basin Index (%) 168 128
LOWER GREEN RIVER
BLACKS FORK JCT 8870 3.8 -M * 15.3 -M *
BUCK PASTURE 9700 12.2 -M * 19.8 -M *
EF BLACKS FORK GS 9360 6.1 -M * 11.6 -M *
HAMS FORK 7840 9.2 2.9 317 15.0 13.1 115
HEWINTA 9519 6.9 4.8 144 16.3 16.1 101
HICKERSON PARK 9145 .0 4.2 0 9.5 12.0 79
HOLE-IN-ROCK 9150 .0 2.5 0 11.0 11.4 96
INDIAN CREEK 9425 32.7 23.0 142 28.4 25.0 114
KELLEY R.S. 8180 15.7 11.5 137 21.7 20.2 107
SPIRIT LK 10235 8.9 -M * 15.7 -M *
STEEL CREEK PARK 10200 21.8 17.1 127 18.7 19.1 98
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Basin Index (%) 131 103
UPPER BEAR RIVER
BEAR RIVER RS 8777 .0 -M * 14.3 -M *
BUG LAKE 7950 20.0 15.1 132 22.2 21.7 102
BURTS MILLER RANCH 8000 .0 -M * 7.8 -M *
CHALK CREEK #1 8993 20.8 24.2 86 26.0 28.4 92
HAYDEN FORK 9212 10.0 9.3 108 24.1 23.8 101
KELLEY R.S. 8180 15.7 11.5 137 21.7 20.2 107
LILY LAKE 9156 10.8 9.9 109 17.5 19.5 90
MONTE CRISTO 8960 24.2 26.5 91 28.1 29.2 96
SALT RIVER SUMMIT 7760 13.9 7.9 176 20.7 18.4 112
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Basin Index (%) 111 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.