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 15 , 2008
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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 13.0 6.5 200 31.3 25.6 122
COTTONWOOD CREEK 7670 21.4 13.9 154 30.1 33.9 89
GRAND TARGHEE 9260 58.8 -M * 41.8 -M *
GRANITE CREEK 6770 12.2 7.8 156 25.5 23.6 108
GRASSY LAKE 7265 32.8 26.5 124 49.9 42.9 116
GROS VENTRE SUMMIT 8750 11.2 9.9 113 16.9 16.4 103
GUNSIGHT PASS 9820 12.3 -M * 18.0 -M *
LEWIS LAKE DIVIDE 7850 38.1 29.0 131 42.5 43.4 98
PHILLIPS BENCH 8200 30.1 24.1 125 39.4 34.8 113
SALT RIVER SUMMIT 7760 9.2 4.9 188 18.9 22.8 83
SNAKE RIVER STATION 6920 11.9 5.7 209 31.8 26.9 118
SPRING CREEK DIVIDE 9000 22.3 24.7 90 27.5 31.6 87
THUMB DIVIDE 7980 14.1 9.7 145 24.2 23.4 103
TOGWOTEE PASS 9580 31.1 27.4 114 35.3 30.8 115
TWO OCEAN PLATEAU 9240 -M 30.7 * -M 34.1 *
WILLOW CREEK 8380 29.9 25.3 118 46.3 40.1 115
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Basin wide percent of average 129 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 29.3 25.5 115 29.0 25.2 115
BLACK BEAR 8170 48.8 36.5 134 49.5 48.0 103
CANYON 7870 15.6 7.1 220 24.5 19.0 129
FISHER CREEK 9100 47.5 36.6 130 45.2 44.1 102
MADISON PLATEAU 7750 31.1 19.5 159 37.8 32.1 118
NORTHEAST ENTRANCE 7350 3.9 3.3 118 16.5 16.0 103
PARKER PEAK 9400 33.0 24.0 138 30.3 21.2 143
SYLVAN LAKE 8420 21.7 20.3 107 32.1 26.6 121
THUMB DIVIDE 7980 14.1 9.7 145 24.2 23.4 103
TWO OCEAN PLATEAU 9240 -M 30.7 * -M 34.1 *
WHISKEY CREEK 6800 18.4 9.8 188 29.3 25.6 114
WHITE MILL 8700 31.8 24.7 129 32.3 33.1 98
WOLVERINE 7650 4.7 3.2 147 17.4 16.7 104
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Basin wide percent of average 136 111
WIND RIVER
BURROUGHS CREEK 8750 14.9 10.4 143 21.3 20.9 102
COLD SPRINGS 9630 .2 3.3 6 13.4 15.5 86
DEER PARK 9700 16.2 17.2 94 24.8 28.8 86
HOBBS PARK 10100 17.2 16.7 103 19.9 18.9 105
LITTLE WARM 9370 8.0 7.8 103 17.7 18.5 96
SOUTH PASS 9040 13.4 14.1 95 21.6 24.5 88
ST. LAWRENCE ALT 8620 1.4 3.7 38 11.7 13.7 85
TOGWOTEE PASS 9580 31.1 27.4 114 35.3 30.8 115
TOWNSEND CREEK 8700 6.1 5.7 107 16.0 17.2 93
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Basin wide percent of average 102 96
BIGHORN BASIN
BALD MTN. 9380 20.9 23.0 91 20.4 23.4 87
BEAR TRAP MEADOW 8200 4.4 .7 629 13.0 12.5 104
BLACKWATER 9780 31.4 28.8 109 29.8 26.6 112
BONE SPRINGS DIV 9350 21.7 16.2 134 23.3 20.3 115
EVENING STAR 9200 32.8 32.5 101 40.3 32.0 126
GRAVE SPRINGS 8550 12.0 7.9 152 14.6 14.6 100
KIRWIN 9550 12.5 11.0 114 17.7 15.8 112
MARQUETTE 8760 10.2 8.9 115 14.8 15.8 94
MIDDLE POWDER 7760 15.7 11.1 141 14.4 17.5 82
OWL CREEK 8975 .0 2.3 0 9.4 9.5 99
POWDER RIVER PASS 9480 12.8 8.1 158 19.1 17.6 109
SHELL CREEK 9580 19.9 16.3 122 20.7 18.6 111
SYLVAN LAKE 8420 21.7 20.3 107 32.1 26.6 121
SYLVAN ROAD 7120 3.3 2.7 122 24.5 21.9 112
TIMBER CREEK 7950 3.7 2.2 168 12.6 12.4 102
YOUNTS PEAK 8350 16.6 15.4 108 20.3 20.3 100
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Basin wide percent of average 116 107
SHOSHONE RIVER
BLACKWATER 9780 31.4 28.8 109 29.8 26.6 112
EVENING STAR 9200 32.8 32.5 101 40.3 32.0 126
KIRWIN 9550 12.5 11.0 114 17.7 15.8 112
MARQUETTE 8760 10.2 8.9 115 14.8 15.8 94
SYLVAN LAKE 8420 21.7 20.3 107 32.1 26.6 121
SYLVAN ROAD 7120 3.3 2.7 122 24.5 21.9 112
YOUNTS PEAK 8350 16.6 15.4 108 20.3 20.3 100
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Basin wide percent of average 107 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 4.4 .7 629 13.0 12.5 104
BIG GOOSE 7990 11.7 9.1 129 18.0 14.8 122
BONE SPRINGS DIV 9350 21.7 16.2 134 23.3 20.3 115
BURGESS JUNCTION 7880 17.3 10.2 170 20.4 17.0 120
CLOUD PEAK RESERVOIR 9860 20.2 14.8 136 21.9 19.4 113
DOME LAKE 8880 13.1 10.4 126 21.3 18.8 113
GRAVE SPRINGS 8550 12.0 7.9 152 14.6 14.6 100
HANSEN SAWMILL 8360 3.2 2.2 145 13.2 12.4 106
MIDDLE POWDER 7760 15.7 11.1 141 14.4 17.5 82
POWDER RIVER PASS 9480 12.8 8.1 158 19.1 17.6 109
SUCKER CREEK 8880 18.7 10.2 183 24.0 19.5 123
TIE CREEK 6870 5.6 1.3 431 17.4 15.4 113
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Basin wide percent of average 153 110
BELLE FOURCHE
BLIND PARK 6890 1.9 .1 1900 16.7 15.9 105
COLE CANYON 5910 3.2 .8 400 14.4 11.2 129
NORTH RAPID CREEK 6130 5.4 .6 900 16.6 12.7 131
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Basin wide percent of average 700 120
UPPER N. PLATTE RIVER
COLUMBINE 9160 21.6 13.1 165 34.9 30.7 114
DIVIDE PEAK 8880 21.1 12.8 165 29.0 25.9 112
ELK RIVER 8700 17.6 7.6 232 28.8 24.5 118
JOE WRIGHT 10120 29.6 23.8 124 36.7 32.5 113
NORTH FRENCH CREEK 10130 34.6 33.2 104 37.2 32.0 116
OLD BATTLE 10000 40.0 35.5 113 47.7 42.2 113
SAGE CREEK BASIN 7850 7.9 7.4 107 20.6 15.0 137
SOUTH BRUSH CREEK 8440 5.9 6.5 91 21.5 21.9 98
TOWER 10500 51.4 51.5 100 50.6 47.7 106
WEBBER SPRINGS 9250 25.0 18.1 138 37.6 33.0 114
WILLOW CREEK PASS 9540 21.8 11.2 195 21.4 17.1 125
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Basin wide percent of average 125 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 20.9 23.1 90 28.0 29.2 96
CASPER MTN. 7900 16.9 11.7 144 21.3 21.8 98
DEADMAN HILL 10220 21.9 18.0 122 25.7 22.9 112
DEER PARK 9700 16.2 17.2 94 24.8 28.8 86
LAPRELE CREEK 8375 3.9 3.6 108 16.4 18.2 90
RENO HILL 8400 18.0 9.7 186 25.8 22.5 115
ROACH 9700 20.8 13.4 155 28.6 24.4 117
SAND LAKE 10050 35.1 35.5 99 37.6 31.8 118
SOUTH PASS 9040 13.4 14.1 95 21.6 24.5 88
WINDY PEAK 7900 3.1 1.7 182 14.2 15.2 93
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Basin wide percent of average 115 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .6 0 20.8 19.8 105
DIVIDE PEAK 8880 21.1 12.8 165 29.0 25.9 112
OLD BATTLE 10000 40.0 35.5 113 47.7 42.2 113
SANDSTONE RS 8150 10.0 3.8 263 26.0 23.4 111
WHISKEY PARK 8950 36.6 26.5 138 43.5 36.0 121
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Basin wide percent of average 136 113
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.9 9.0 99 15.9 17.2 92
BLIND BULL SUM 8650 27.6 24.9 111 20.7 26.6 78
EAST RIM DIVIDE 7930 4.1 9.2 45 12.9 14.9 87
ELKHART PARK G.S. 9400 9.3 9.4 99 13.9 17.4 80
GROS VENTRE SUMMIT 8750 11.2 9.9 113 16.9 16.4 103
GUNSIGHT PASS 9820 12.3 -M * 18.0 -M *
KENDALL R.S. 7740 3.4 3.7 92 15.7 17.5 90
LOOMIS PARK 8240 8.8 9.7 91 20.6 21.2 97
NEW FORK LAKE 8340 3.2 3.8 84 11.4 14.5 79
SNIDER BASIN 8060 6.7 7.7 87 16.1 19.4 83
SPRING CREEK DIVIDE 9000 22.3 24.7 90 27.5 31.6 87
TRIPLE PEAK 8500 21.1 17.1 123 33.7 30.3 111
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Basin wide percent of average 98 90
LOWER GREEN RIVER
HAMS FORK 7840 2.9 1.1 264 12.7 15.9 80
HEWINTA 9519 6.7 4.5 149 20.4 19.0 107
HICKERSON PARK 9145 .1 2.1 5 11.4 11.4 100
HOLE-IN-ROCK 9150 .0 1.7 0 11.9 10.9 109
INDIAN CREEK 9425 -M 23.7 * -M 31.0 *
KELLEY R.S. 8180 11.5 9.1 126 21.3 24.9 86
STEEL CREEK PARK 10200 20.3 18.1 112 22.5 21.6 104
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Basin wide percent of average 113 97
UPPER BEAR RIVER
BUG LAKE 7950 14.4 10.9 132 20.0 23.8 84
HAYDEN FORK 9212 8.7 7.3 119 27.8 26.8 104
KELLEY R.S. 8180 11.5 9.1 126 21.3 24.9 86
LILY LAKE 9156 9.3 6.3 148 21.8 22.6 96
MONTE CRISTO 8960 24.6 22.7 108 30.5 32.2 95
SALT RIVER SUMMIT 7760 9.2 4.9 188 18.9 22.8 83
TRIAL LAKE 9992 20.9 23.2 90 28.8 31.3 92
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Basin wide percent of average 117 92
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
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.