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 TUESDAY: MAY 18 , 2010
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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 .0 5.6 0 15.9 25.8 62
COTTONWOOD CREEK 7670 13.1 13.0 101 27.6 34.1 81
GRAND TARGHEE 9260 44.4 -M * 35.1 -M *
GRANITE CREEK 6770 .0 7.1 0 15.7 23.7 66
GRASSY LAKE 7265 15.4 25.3 61 31.0 43.1 72
GROS VENTRE SUMMIT 8750 6.2 9.2 67 11.9 16.5 72
GUNSIGHT PASS 9820 11.1 -M * 15.1 -M *
LEWIS LAKE DIVIDE 7850 16.1 27.9 58 26.3 43.7 60
PHILLIPS BENCH 8200 14.6 23.1 63 25.0 35.0 71
SALT RIVER SUMMIT 7760 3.2 3.9 82 15.8 23.0 69
SNAKE RIVER STATION 6920 .0 4.7 0 19.3 27.1 71
SPRING CREEK DIVIDE 9000 22.2 23.8 93 23.6 31.8 74
THUMB DIVIDE 7980 1.4 8.8 16 16.7 23.6 71
TOGWOTEE PASS 9580 22.7 27.0 84 -M 31.0 *
TWO OCEAN PLATEAU 9240 25.1 30.3 83 22.3 34.4 65
WILLOW CREEK 8380 19.4 24.2 80 34.9 40.5 86
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Basin wide percent of average 68 71
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.5 25.2 65 18.0 25.4 71
BLACK BEAR 8170 24.2 35.8 68 31.7 48.3 66
CANYON 7870 4.3 6.3 68 14.1 19.2 73
FISHER CREEK 9100 25.1 36.0 70 29.6 44.4 67
MADISON PLATEAU 7750 14.0 18.6 75 25.1 32.4 77
NORTHEAST ENTRANCE 7350 .0 2.6 0 11.6 16.2 72
PARKER PEAK 9400 19.3 23.7 81 16.9 21.5 79
SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82
THUMB DIVIDE 7980 1.4 8.8 16 16.7 23.6 71
TWO OCEAN PLATEAU 9240 25.1 30.3 83 22.3 34.4 65
WHISKEY CREEK 6800 6.3 8.7 72 16.2 25.8 63
WHITE MILL 8700 17.7 24.2 73 20.5 33.3 62
WOLVERINE 7650 .0 2.4 0 9.6 16.9 57
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Basin wide percent of average 68 69
WIND RIVER
BURROUGHS CREEK 8750 10.7 9.9 108 13.2 21.1 63
COLD SPRINGS 9630 8.4 2.9 290 17.7 15.7 113
DEER PARK 9700 21.9 16.7 131 27.5 29.1 95
HOBBS PARK 10100 25.1 16.3 154 26.6 19.2 139
LITTLE WARM 9370 9.4 7.1 132 14.5 18.6 78
SOUTH PASS 9040 18.8 13.0 145 25.6 24.7 104
ST. LAWRENCE ALT 8620 8.5 3.1 274 19.2 13.9 138
TOGWOTEE PASS 9580 22.7 27.0 84 -M 31.0 *
TOWNSEND CREEK 8700 15.3 5.2 294 24.1 17.4 139
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Basin wide percent of average 139 105
BIGHORN BASIN
BALD MTN. 9380 18.0 22.7 79 16.0 23.6 68
BEAR TRAP MEADOW 8200 3.8 .4 950* 12.4 12.7 98
BLACKWATER 9780 22.3 28.7 78 21.8 26.9 81
BONE SPRINGS DIV 9350 14.2 15.7 90 15.4 20.5 75
EVENING STAR 9200 19.4 32.0 61 26.3 32.3 81
GRAVE SPRINGS 8550 11.0 6.7 164 16.8 14.8 114
KIRWIN 9550 12.3 10.6 116 15.7 16.0 98
MARQUETTE 8760 13.9 8.4 165 16.8 16.0 105
MIDDLE POWDER 7760 12.6 10.1 125 13.2 17.7 75
OWL CREEK 8975 2.1 2.0 105 11.3 9.7 116
POWDER RIVER PASS 9480 8.3 7.4 112 15.2 17.9 85
SHELL CREEK 9580 15.0 16.0 94 16.1 18.9 85
SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82
SYLVAN ROAD 7120 .0 2.3 0 15.8 22.0 72
TIMBER CREEK 7950 4.2 2.0 210 13.3 12.6 106
YOUNTS PEAK 8350 11.1 14.6 76 13.3 20.5 65
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Basin wide percent of average 90 85
SHOSHONE RIVER
BLACKWATER 9780 22.3 28.7 78 21.8 26.9 81
EVENING STAR 9200 19.4 32.0 61 26.3 32.3 81
KIRWIN 9550 12.3 10.6 116 15.7 16.0 98
MARQUETTE 8760 13.9 8.4 165 16.8 16.0 105
SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82
SYLVAN ROAD 7120 .0 2.3 0 15.8 22.0 72
YOUNTS PEAK 8350 11.1 14.6 76 13.3 20.5 65
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Basin wide percent of average 78 82
POWDER-TONGUE
BEAR TRAP MEADOW 8200 3.8 .4 950* 12.4 12.7 98
BIG GOOSE 7990 12.6 8.7 145 18.2 15.0 121
BONE SPRINGS DIV 9350 14.2 15.7 90 15.4 20.5 75
BURGESS JUNCTION 7880 13.6 9.3 146 16.6 17.2 97
CLOUD PEAK RESERVOIR 9860 19.0 14.3 133 19.7 19.7 100
DOME LAKE 8880 13.3 9.6 139 19.2 19.0 101
GRAVE SPRINGS 8550 11.0 6.7 164 16.8 14.8 114
HANSEN SAWMILL 8360 4.7 1.8 261 14.0 12.6 111
MIDDLE POWDER 7760 12.6 10.1 125 13.2 17.7 75
POWDER RIVER PASS 9480 8.3 7.4 112 15.2 17.9 85
SUCKER CREEK 8880 17.1 9.4 182 21.5 19.8 109
TIE CREEK 6870 5.7 1.2 475 18.6 15.6 119
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Basin wide percent of average 144 99
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 18.3 16.2 113
COLE CANYON 5910 2.5 .5 500* 17.1 11.4 150
NORTH RAPID CREEK 6130 .0 .4 0* 17.0 12.9 132
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Basin wide percent of average 278* 129
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.2 11.7 138 29.6 30.9 96
DIVIDE PEAK 8880 18.0 11.6 155 29.8 26.1 114
ELK RIVER 8700 12.4 6.5 191 26.3 24.7 106
JOE WRIGHT 10120 25.4 23.4 109 30.4 32.8 93
NORTH FRENCH CREEK 10130 -M 32.6 * -M 32.3 *
OLD BATTLE 10000 43.2 34.7 124 46.0 42.4 108
SAGE CREEK BASIN 7850 .3 6.7 4 16.1 15.1 107
SOUTH BRUSH CREEK 8440 9.8 5.8 169 25.4 22.1 115
TOWER 10500 43.4 51.0 85 43.4 48.0 90
WEBBER SPRINGS 9250 24.6 16.7 147 36.2 33.2 109
WILLOW CREEK PASS 9540 14.1 10.4 136 18.0 17.3 104
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Basin wide percent of average 116 103
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.3 21.9 116 29.8 29.4 101
CASPER MTN. 7900 15.2 10.7 142 20.1 22.1 91
DEADMAN HILL 10220 -M 17.5 * -M 23.1 *
DEER PARK 9700 21.9 16.7 131 27.5 29.1 95
LAPRELE CREEK 8375 5.5 3.1 177 18.7 18.5 101
RENO HILL 8400 17.7 8.8 201 25.9 22.8 114
ROACH 9700 22.3 12.5 178 29.0 24.6 118
SAND LAKE 10050 40.7 34.9 117 40.5 32.2 126
SOUTH PASS 9040 18.8 13.0 145 25.6 24.7 104
WINDY PEAK 7900 5.9 1.4 421 18.1 15.4 118
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Basin wide percent of average 141 107
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 19.0 19.9 95
DIVIDE PEAK 8880 18.0 11.6 155 29.8 26.1 114
OLD BATTLE 10000 43.2 34.7 124 46.0 42.4 108
SANDSTONE RS 8150 1.4 3.1 45 22.0 23.6 93
WHISKEY PARK 8950 27.2 25.4 107 39.5 36.2 109
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Basin wide percent of average 120 105
UPPER GREEN RIVER
BIG SANDY OPENING 9080 -M 8.2 * 12.5 17.4 72
BLIND BULL SUM 8650 19.0 24.3 78 16.8 26.8 63
EAST RIM DIVIDE 7930 .2 8.4 2 9.2 15.0 61
ELKHART PARK G.S. 9400 6.5 8.8 74 11.6 17.6 66
GROS VENTRE SUMMIT 8750 6.2 9.2 67 11.9 16.5 72
GUNSIGHT PASS 9820 11.1 -M * 15.1 -M *
KENDALL R.S. 7740 .1 2.7 4 10.8 17.7 61
LOOMIS PARK 8240 1.5 8.9 17 13.1 21.3 62
NEW FORK LAKE 8340 .1 3.1 3 9.5 14.7 65
POCKET CREEK 9360 8.7 -M * 14.5 -M *
SNIDER BASIN 8060 6.1 6.8 90 15.7 19.6 80
SPRING CREEK DIVIDE 9000 22.2 23.8 93 23.6 31.8 74
TRIPLE PEAK 8500 16.2 15.8 103 27.2 30.5 89
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Basin wide percent of average 70 71
LOWER GREEN RIVER
HAMS FORK 7840 .3 .4 75* 13.9 16.0 87
HEWINTA 9519 7.1 3.8 187 17.7 19.2 92
HICKERSON PARK 9145 1.0 1.6 63 15.3 11.5 133
HOLE-IN-ROCK 9150 1.1 1.4 79 15.1 11.1 136
INDIAN CREEK 9425 20.0 22.9 87 22.4 31.2 72
KELLEY R.S. 8180 6.4 8.2 78 17.6 25.0 70
STEEL CREEK PARK 10200 21.0 17.6 119 22.0 21.8 101
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Basin wide percent of average 102 91
UPPER BEAR RIVER
BUG LAKE 7950 9.8 9.7 101 19.2 23.9 80
HAYDEN FORK 9212 4.6 6.5 71 23.8 27.0 88
KELLEY R.S. 8180 6.4 8.2 78 17.6 25.0 70
LILY LAKE 9156 10.1 5.6 180 20.0 22.8 88
MONTE CRISTO 8960 17.0 21.6 79 24.5 32.5 75
SALT RIVER SUMMIT 7760 3.2 3.9 82 15.8 23.0 69
TRIAL LAKE 9992 19.6 22.4 88 21.5 31.6 68
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Basin wide percent of average 91 77
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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 1971-2000.
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.