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 MONDAY: MAY 12 , 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 14.1 7.9 178 31.0 25.3 123
COTTONWOOD CREEK 7670 21.8 15.3 142 29.7 33.5 89
GRAND TARGHEE 9260 58.0 -M * 40.9 -M *
GRANITE CREEK 6770 13.6 9.0 151 25.5 23.3 109
GRASSY LAKE 7265 -M 28.3 * 49.4 42.4 117
GROS VENTRE SUMMIT 8750 12.2 10.8 113 16.7 16.1 104
GUNSIGHT PASS 9820 12.7 -M * 17.9 -M *
LEWIS LAKE DIVIDE 7850 39.1 30.5 128 42.0 43.1 97
PHILLIPS BENCH 8200 31.5 25.5 124 39.1 34.4 114
SALT RIVER SUMMIT 7760 10.1 6.2 163 18.7 22.6 83
SNAKE RIVER STATION 6920 13.5 7.2 188 31.6 26.6 119
SPRING CREEK DIVIDE 9000 23.3 25.9 90 27.3 31.3 87
THUMB DIVIDE 7980 14.7 10.9 135 23.7 23.1 103
TOGWOTEE PASS 9580 30.9 27.8 111 35.0 30.4 115
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 *
WILLOW CREEK 8380 30.2 26.8 113 45.9 39.7 116
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Basin wide percent of average 125 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 29.3 25.7 114 28.4 24.9 114
BLACK BEAR 8170 48.0 37.5 128 48.8 47.6 103
CANYON 7870 16.2 8.0 202 24.2 18.7 129
FISHER CREEK 9100 47.6 37.3 128 44.6 43.7 102
MADISON PLATEAU 7750 31.2 20.9 149 37.3 31.7 118
NORTHEAST ENTRANCE 7350 5.5 4.4 125 16.3 15.8 103
PARKER PEAK 9400 32.9 24.2 136 29.9 20.9 143
SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121
THUMB DIVIDE 7980 14.7 10.9 135 23.7 23.1 103
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 *
WHISKEY CREEK 6800 18.9 11.3 167 28.7 25.3 113
WHITE MILL 8700 32.1 25.5 126 32.1 32.7 98
WOLVERINE 7650 6.0 4.2 143 17.0 16.4 104
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Basin wide percent of average 132 111
WIND RIVER
BURROUGHS CREEK 8750 15.7 11.1 141 21.3 20.5 104
COLD SPRINGS 9630 .4 4.0 10 12.6 15.2 83
DEER PARK 9700 15.7 17.0 92 24.1 28.4 85
HOBBS PARK 10100 16.3 17.3 94 19.1 18.5 103
LITTLE WARM 9370 8.7 8.5 102 17.6 18.1 97
SOUTH PASS 9040 13.4 15.1 89 21.0 24.2 87
ST. LAWRENCE ALT 8620 1.4 4.5 31 10.7 13.4 80
TOGWOTEE PASS 9580 30.9 27.8 111 35.0 30.4 115
TOWNSEND CREEK 8700 6.1 6.5 94 15.4 16.9 91
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Basin wide percent of average 97 95
BIGHORN BASIN
BALD MTN. 9380 20.0 23.5 85 19.6 23.0 85
BEAR TRAP MEADOW 8200 4.6 1.1 418 12.5 12.1 103
BLACKWATER 9780 31.0 28.8 108 29.3 26.2 112
BONE SPRINGS DIV 9350 20.7 16.9 122 22.4 19.9 113
EVENING STAR 9200 33.0 32.9 100 39.7 31.5 126
GRAVE SPRINGS 8550 11.5 9.2 125 14.1 14.4 98
KIRWIN 9550 12.6 11.9 106 17.3 15.5 112
MARQUETTE 8760 9.5 9.6 99 14.0 15.3 92
MIDDLE POWDER 7760 15.4 11.9 129 14.0 17.1 82
OWL CREEK 8975 .1 2.8 4 8.7 9.2 95
POWDER RIVER PASS 9480 12.5 8.8 142 18.5 17.3 107
SHELL CREEK 9580 19.0 16.7 114 20.0 18.3 109
SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121
SYLVAN ROAD 7120 4.9 3.7 132 24.3 21.6 112
TIMBER CREEK 7950 3.0 2.8 107 11.4 12.0 95
YOUNTS PEAK 8350 17.1 16.5 104 20.1 20.0 101
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Basin wide percent of average 108 106
SHOSHONE RIVER
BLACKWATER 9780 31.0 28.8 108 29.3 26.2 112
EVENING STAR 9200 33.0 32.9 100 39.7 31.5 126
KIRWIN 9550 12.6 11.9 106 17.3 15.5 112
MARQUETTE 8760 9.5 9.6 99 14.0 15.3 92
SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121
SYLVAN ROAD 7120 4.9 3.7 132 24.3 21.6 112
YOUNTS PEAK 8350 17.1 16.5 104 20.1 20.0 101
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Basin wide percent of average 104 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 4.6 1.1 418 12.5 12.1 103
BIG GOOSE 7990 11.3 9.7 116 17.4 14.5 120
BONE SPRINGS DIV 9350 20.7 16.9 122 22.4 19.9 113
BURGESS JUNCTION 7880 16.4 11.1 148 19.2 16.7 115
CLOUD PEAK RESERVOIR 9860 19.5 15.4 127 21.1 18.9 112
DOME LAKE 8880 12.6 11.2 112 20.4 18.4 111
GRAVE SPRINGS 8550 11.5 9.2 125 14.1 14.4 98
HANSEN SAWMILL 8360 2.4 3.0 80 12.3 12.1 102
MIDDLE POWDER 7760 15.4 11.9 129 14.0 17.1 82
POWDER RIVER PASS 9480 12.5 8.8 142 18.5 17.3 107
SUCKER CREEK 8880 17.4 11.0 158 22.8 19.1 119
TIE CREEK 6870 5.4 2.1 257 16.4 15.0 109
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Basin wide percent of average 134 108
BELLE FOURCHE
BLIND PARK 6890 1.4 .8 175 16.2 15.6 104
COLE CANYON 5910 4.3 1.2 358 14.2 10.9 130
NORTH RAPID CREEK 6130 6.6 .9 733 16.2 12.5 130
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Basin wide percent of average 424 119
UPPER N. PLATTE RIVER
COLUMBINE 9160 22.5 15.1 149 34.4 30.4 113
DIVIDE PEAK 8880 20.5 14.5 141 28.2 25.6 110
ELK RIVER 8700 17.3 9.2 188 28.2 24.2 117
JOE WRIGHT 10120 29.2 24.4 120 36.0 32.0 112
NORTH FRENCH CREEK 10130 34.5 33.8 102 36.6 31.6 116
OLD BATTLE 10000 39.2 36.4 108 47.0 41.7 113
SAGE CREEK BASIN 7850 8.0 8.4 95 20.0 14.8 135
SOUTH BRUSH CREEK 8440 5.7 7.6 75 21.0 21.5 98
TOWER 10500 51.0 52.1 98 49.9 47.3 105
WEBBER SPRINGS 9250 24.9 20.0 124 37.1 32.6 114
WILLOW CREEK PASS 9540 21.5 12.3 175 21.0 16.8 125
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Basin wide percent of average 117 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.0 24.8 85 27.6 28.7 96
CASPER MTN. 7900 16.5 13.2 125 20.6 21.3 97
DEADMAN HILL 10220 21.3 18.7 114 25.0 22.5 111
DEER PARK 9700 15.7 17.0 92 24.1 28.4 85
LAPRELE CREEK 8375 4.4 4.3 102 16.1 17.9 90
RENO HILL 8400 17.7 10.9 162 25.3 22.1 114
ROACH 9700 20.0 14.8 135 27.6 24.0 115
SAND LAKE 10050 34.9 36.2 96 36.9 31.3 118
SOUTH PASS 9040 13.4 15.1 89 21.0 24.2 87
WINDY PEAK 7900 3.8 2.3 165 13.8 14.8 93
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Basin wide percent of average 107 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 1.5 7 20.1 19.6 103
DIVIDE PEAK 8880 20.5 14.5 141 28.2 25.6 110
OLD BATTLE 10000 39.2 36.4 108 47.0 41.7 113
SANDSTONE RS 8150 10.1 4.9 206 25.4 23.1 110
WHISKEY PARK 8950 36.1 27.9 129 42.8 35.6 120
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Basin wide percent of average 124 112
UPPER GREEN RIVER
BIG SANDY OPENING 9080 10.5 10.2 103 16.0 16.9 95
BLIND BULL SUM 8650 27.7 25.8 107 20.5 26.3 78
EAST RIM DIVIDE 7930 5.5 10.3 53 12.9 14.7 88
ELKHART PARK G.S. 9400 10.1 10.3 98 14.0 17.1 82
GROS VENTRE SUMMIT 8750 12.2 10.8 113 16.7 16.1 104
GUNSIGHT PASS 9820 12.7 -M * 17.9 -M *
KENDALL R.S. 7740 5.2 5.2 100 15.7 17.3 91
LOOMIS PARK 8240 10.1 10.8 94 20.5 20.9 98
NEW FORK LAKE 8340 4.6 4.9 94 11.4 14.3 80
SNIDER BASIN 8060 8.1 8.9 91 16.1 19.3 83
SPRING CREEK DIVIDE 9000 23.3 25.9 90 27.3 31.3 87
TRIPLE PEAK 8500 21.8 18.9 115 33.3 30.0 111
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Basin wide percent of average 98 91
LOWER GREEN RIVER
HAMS FORK 7840 4.2 2.2 191 12.6 15.7 80
HEWINTA 9519 6.5 5.5 118 19.8 18.8 105
HICKERSON PARK 9145 .3 2.8 11 11.3 11.1 102
HOLE-IN-ROCK 9150 .2 2.3 9 11.9 10.7 111
INDIAN CREEK 9425 -M 25.0 * -M 30.7 *
KELLEY R.S. 8180 12.3 10.3 119 21.0 24.6 85
STEEL CREEK PARK 10200 19.4 18.6 104 21.9 21.4 102
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Basin wide percent of average 103 96
UPPER BEAR RIVER
BUG LAKE 7950 14.7 12.5 118 19.7 23.5 84
HAYDEN FORK 9212 8.3 8.6 97 27.0 26.4 102
KELLEY R.S. 8180 12.3 10.3 119 21.0 24.6 85
LILY LAKE 9156 9.0 7.4 122 21.0 22.3 94
MONTE CRISTO 8960 25.2 24.1 105 30.2 31.9 95
SALT RIVER SUMMIT 7760 10.1 6.2 163 18.7 22.6 83
TRIAL LAKE 9992 21.3 24.3 88 28.4 30.9 92
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Basin wide percent of average 108 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.