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 11 , 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 14.4 8.3 173 30.9 25.2 123
COTTONWOOD CREEK 7670 21.9 15.8 139 29.6 33.4 89
GRAND TARGHEE 9260 57.2 -M * 40.1 -M *
GRANITE CREEK 6770 14.0 9.4 149 25.5 23.2 110
GRASSY LAKE 7265 -M 28.8 * 49.0 42.3 116
GROS VENTRE SUMMIT 8750 12.4 11.0 113 16.7 16.1 104
GUNSIGHT PASS 9820 13.2 -M * 17.7 -M *
LEWIS LAKE DIVIDE 7850 39.2 30.9 127 41.8 43.0 97
PHILLIPS BENCH 8200 31.9 26.0 123 39.0 34.3 114
SALT RIVER SUMMIT 7760 10.3 6.7 154 18.6 22.5 83
SNAKE RIVER STATION 6920 14.4 7.7 187 31.2 26.5 118
SPRING CREEK DIVIDE 9000 23.5 26.2 90 27.2 31.2 87
THUMB DIVIDE 7980 14.9 11.3 132 23.5 23.0 102
TOGWOTEE PASS 9580 30.8 27.9 110 34.8 30.3 115
TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 *
WILLOW CREEK 8380 30.3 27.2 111 45.4 39.5 115
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Basin wide percent of average 124 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 28.9 25.9 112 27.9 24.7 113
BLACK BEAR 8170 -M 37.8 * 48.3 47.4 102
CANYON 7870 16.5 8.3 199 23.9 18.6 128
FISHER CREEK 9100 47.5 37.5 127 44.5 43.5 102
MADISON PLATEAU 7750 30.7 21.2 145 36.9 31.6 117
NORTHEAST ENTRANCE 7350 5.8 4.7 123 16.1 15.7 103
PARKER PEAK 9400 32.1 24.3 132 -M 20.7 *
SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119
THUMB DIVIDE 7980 14.9 11.3 132 23.5 23.0 102
TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 *
WHISKEY CREEK 6800 19.0 11.7 162 28.6 25.2 113
WHITE MILL 8700 32.0 25.7 125 31.9 32.6 98
WOLVERINE 7650 6.2 4.5 138 16.7 16.2 103
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Basin wide percent of average 130 108
WIND RIVER
BURROUGHS CREEK 8750 16.0 11.2 143 21.2 20.4 104
COLD SPRINGS 9630 1.0 4.1 24 12.5 15.1 83
DEER PARK 9700 15.8 16.8 94 24.1 28.2 85
HOBBS PARK 10100 16.6 17.4 95 18.8 18.4 102
LITTLE WARM 9370 8.9 8.7 102 17.4 18.0 97
SOUTH PASS 9040 13.9 15.5 90 21.0 24.1 87
ST. LAWRENCE ALT 8620 2.4 4.7 51 10.6 13.3 80
TOGWOTEE PASS 9580 30.8 27.9 110 34.8 30.3 115
TOWNSEND CREEK 8700 6.8 6.8 100 15.4 16.8 92
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Basin wide percent of average 99 95
BIGHORN BASIN
BALD MTN. 9380 20.2 23.5 86 19.4 22.8 85
BEAR TRAP MEADOW 8200 5.3 1.3 408 12.5 12.0 104
BLACKWATER 9780 30.3 28.7 106 28.7 26.1 110
BONE SPRINGS DIV 9350 21.2 17.1 124 22.3 19.7 113
EVENING STAR 9200 32.5 33.0 98 39.4 31.4 125
GRAVE SPRINGS 8550 11.8 9.4 126 14.1 14.3 99
KIRWIN 9550 12.8 12.0 107 17.2 15.4 112
MARQUETTE 8760 9.5 9.8 97 14.0 15.2 92
MIDDLE POWDER 7760 15.6 12.1 129 14.1 17.0 83
OWL CREEK 8975 .1 3.0 3 8.7 9.1 96
POWDER RIVER PASS 9480 12.7 9.0 141 18.5 17.1 108
SHELL CREEK 9580 19.1 16.8 114 19.9 18.1 110
SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119
SYLVAN ROAD 7120 5.4 4.1 132 23.7 21.5 110
TIMBER CREEK 7950 3.5 3.0 117 11.4 11.9 96
YOUNTS PEAK 8350 17.5 16.6 105 19.9 19.8 101
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Basin wide percent of average 108 106
SHOSHONE RIVER
BLACKWATER 9780 30.3 28.7 106 28.7 26.1 110
EVENING STAR 9200 32.5 33.0 98 39.4 31.4 125
KIRWIN 9550 12.8 12.0 107 17.2 15.4 112
MARQUETTE 8760 9.5 9.8 97 14.0 15.2 92
SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119
SYLVAN ROAD 7120 5.4 4.1 132 23.7 21.5 110
YOUNTS PEAK 8350 17.5 16.6 105 19.9 19.8 101
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Basin wide percent of average 103 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 5.3 1.3 408 12.5 12.0 104
BIG GOOSE 7990 11.5 9.9 116 17.2 14.3 120
BONE SPRINGS DIV 9350 21.2 17.1 124 22.3 19.7 113
BURGESS JUNCTION 7880 16.7 11.4 146 19.1 16.6 115
CLOUD PEAK RESERVOIR 9860 20.0 15.5 129 20.9 18.8 111
DOME LAKE 8880 13.1 11.4 115 20.3 18.2 112
GRAVE SPRINGS 8550 11.8 9.4 126 14.1 14.3 99
HANSEN SAWMILL 8360 3.5 3.2 109 12.3 12.0 103
MIDDLE POWDER 7760 15.6 12.1 129 14.1 17.0 83
POWDER RIVER PASS 9480 12.7 9.0 141 18.5 17.1 108
SUCKER CREEK 8880 17.7 11.2 158 22.5 19.0 118
TIE CREEK 6870 6.1 2.4 254 16.4 14.9 110
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Basin wide percent of average 136 108
BELLE FOURCHE
BLIND PARK 6890 2.2 1.3 169 16.1 15.4 105
COLE CANYON 5910 4.7 1.4 336 13.9 10.8 129
NORTH RAPID CREEK 6130 6.9 1.1 627 16.0 12.4 129
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Basin wide percent of average 363 119
UPPER N. PLATTE RIVER
COLUMBINE 9160 22.5 15.7 143 34.0 30.3 112
DIVIDE PEAK 8880 21.1 15.0 141 28.1 25.4 111
ELK RIVER 8700 18.1 9.8 185 28.0 24.1 116
JOE WRIGHT 10120 29.3 24.6 119 35.9 31.8 113
NORTH FRENCH CREEK 10130 34.4 34.0 101 36.6 31.4 117
OLD BATTLE 10000 39.2 36.6 107 46.9 41.6 113
SAGE CREEK BASIN 7850 10.0 8.7 115 20.0 14.8 135
SOUTH BRUSH CREEK 8440 6.9 7.9 87 20.8 21.4 97
TOWER 10500 50.6 52.2 97 49.8 47.1 106
WEBBER SPRINGS 9250 25.5 20.6 124 37.1 32.5 114
WILLOW CREEK PASS 9540 21.6 12.6 171 21.0 16.7 126
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Basin wide percent of average 117 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.4 25.3 85 27.6 28.6 97
CASPER MTN. 7900 16.6 13.7 121 20.5 21.2 97
DEADMAN HILL 10220 21.2 18.9 112 25.0 22.4 112
DEER PARK 9700 15.8 16.8 94 24.1 28.2 85
LAPRELE CREEK 8375 4.9 4.6 107 15.9 17.8 89
RENO HILL 8400 17.9 11.4 157 25.0 21.9 114
ROACH 9700 20.4 15.3 133 27.6 23.9 115
SAND LAKE 10050 34.6 36.4 95 36.7 31.2 118
SOUTH PASS 9040 13.9 15.5 90 21.0 24.1 87
WINDY PEAK 7900 4.4 2.5 176 13.9 14.7 95
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Basin wide percent of average 107 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.1 1.7 65 20.1 19.5 103
DIVIDE PEAK 8880 21.1 15.0 141 28.1 25.4 111
OLD BATTLE 10000 39.2 36.6 107 46.9 41.6 113
SANDSTONE RS 8150 11.5 5.3 217 25.4 23.0 110
WHISKEY PARK 8950 36.2 28.3 128 42.7 35.5 120
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Basin wide percent of average 126 113
UPPER GREEN RIVER
BIG SANDY OPENING 9080 10.6 10.5 101 15.8 16.9 93
BLIND BULL SUM 8650 27.8 26.0 107 20.5 26.2 78
EAST RIM DIVIDE 7930 5.8 10.6 55 12.8 14.6 88
ELKHART PARK G.S. 9400 10.3 10.6 97 13.9 17.0 82
GROS VENTRE SUMMIT 8750 12.4 11.0 113 16.7 16.1 104
GUNSIGHT PASS 9820 13.2 -M * 17.7 -M *
KENDALL R.S. 7740 5.7 5.7 100 15.6 17.2 91
LOOMIS PARK 8240 10.6 11.2 95 20.4 20.8 98
NEW FORK LAKE 8340 5.0 5.3 94 11.3 14.2 80
SNIDER BASIN 8060 8.7 9.3 94 16.0 19.2 83
SPRING CREEK DIVIDE 9000 23.5 26.2 90 27.2 31.2 87
TRIPLE PEAK 8500 22.3 19.4 115 33.2 29.9 111
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Basin wide percent of average 98 91
LOWER GREEN RIVER
HAMS FORK 7840 5.2 2.6 200 12.5 15.6 80
HEWINTA 9519 8.1 5.9 137 19.8 18.7 106
HICKERSON PARK 9145 .0 3.1 0 11.0 11.0 100
HOLE-IN-ROCK 9150 .5 2.5 20 11.8 10.6 111
INDIAN CREEK 9425 -M 25.4 * -M 30.6 *
KELLEY R.S. 8180 12.6 10.7 118 20.9 24.5 85
STEEL CREEK PARK 10200 19.6 18.7 105 21.9 21.3 103
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Basin wide percent of average 106 96
UPPER BEAR RIVER
BUG LAKE 7950 14.8 13.1 113 19.5 23.4 83
HAYDEN FORK 9212 10.7 9.1 118 26.8 26.3 102
KELLEY R.S. 8180 12.6 10.7 118 20.9 24.5 85
LILY LAKE 9156 10.1 7.7 131 20.9 22.2 94
MONTE CRISTO 8960 27.0 24.6 110 30.1 31.7 95
SALT RIVER SUMMIT 7760 10.3 6.7 154 18.6 22.5 83
TRIAL LAKE 9992 22.4 24.6 91 28.4 30.8 92
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Basin wide percent of average 112 91
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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.