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 SATURDAY: MAY 22 , 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 .1 3.8 3 16.3 26.1 62
COTTONWOOD CREEK 7670 11.4 11.0 104 28.7 34.6 83
GRAND TARGHEE 9260 43.8 -M * 36.3 -M *
GRANITE CREEK 6770 .1 5.4 2 15.9 24.0 66
GRASSY LAKE 7265 13.2 22.7 58 31.8 43.6 73
GROS VENTRE SUMMIT 8750 5.1 7.9 65 12.9 16.8 77
GUNSIGHT PASS 9820 10.8 -M * 15.7 -M *
LEWIS LAKE DIVIDE 7850 13.3 25.5 52 26.7 44.2 60
PHILLIPS BENCH 8200 12.7 20.8 61 25.0 35.5 70
SALT RIVER SUMMIT 7760 .8 2.0 40 16.7 23.3 72
SNAKE RIVER STATION 6920 .0 2.6 0 19.9 27.4 73
SPRING CREEK DIVIDE 9000 20.9 21.7 96 24.1 32.2 75
THUMB DIVIDE 7980 .3 7.1 4 16.8 23.9 70
TOGWOTEE PASS 9580 22.6 26.0 87 -M 31.5 *
TWO OCEAN PLATEAU 9240 24.5 29.3 84 22.6 34.9 65
WILLOW CREEK 8380 19.0 21.9 87 36.6 41.1 89
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Basin wide percent of average 69 72
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.9 24.2 70 18.2 25.9 70
BLACK BEAR 8170 22.5 33.9 66 32.3 48.8 66
CANYON 7870 2.2 4.7 47 14.6 19.5 75
FISHER CREEK 9100 24.7 34.5 72 30.0 45.1 67
MADISON PLATEAU 7750 12.0 16.3 74 25.7 32.9 78
NORTHEAST ENTRANCE 7350 .0 1.6 0 12.2 16.6 73
PARKER PEAK 9400 18.0 22.8 79 17.4 21.9 79
SYLVAN LAKE 8420 10.9 17.6 62 23.1 27.4 84
THUMB DIVIDE 7980 .3 7.1 4 16.8 23.9 70
TWO OCEAN PLATEAU 9240 24.5 29.3 84 22.6 34.9 65
WHISKEY CREEK 6800 3.5 6.6 53 16.5 26.2 63
WHITE MILL 8700 16.4 23.0 71 20.9 33.8 62
WOLVERINE 7650 .0 1.5 0 9.9 17.3 57
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Basin wide percent of average 68 70
WIND RIVER
BURROUGHS CREEK 8750 9.4 8.2 115 -M 21.5 *
COLD SPRINGS 9630 7.6 2.0 380 18.6 16.1 116
DEER PARK 9700 21.6 15.9 136 28.2 29.7 95
HOBBS PARK 10100 26.1 15.1 173 27.7 19.7 141
LITTLE WARM 9370 8.3 5.4 154 14.8 19.0 78
SOUTH PASS 9040 18.1 11.0 165 26.2 25.1 104
ST. LAWRENCE ALT 8620 6.9 1.9 363 19.8 14.3 138
TOGWOTEE PASS 9580 22.6 26.0 87 -M 31.5 *
TOWNSEND CREEK 8700 14.2 3.9 364 24.8 17.8 139
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Basin wide percent of average 151 113
BIGHORN BASIN
BALD MTN. 9380 17.0 21.6 79 16.1 24.1 67
BEAR TRAP MEADOW 8200 1.5 .0 * 13.3 13.1 102
BLACKWATER 9780 22.2 28.5 78 22.5 27.4 82
BONE SPRINGS DIV 9350 12.9 14.0 92 15.6 21.0 74
EVENING STAR 9200 18.6 31.0 60 26.6 32.8 81
GRAVE SPRINGS 8550 9.5 4.4 216 17.4 15.2 114
KIRWIN 9550 11.7 9.7 121 16.5 16.4 101
MARQUETTE 8760 12.9 7.4 174 17.8 16.6 107
MIDDLE POWDER 7760 10.5 7.9 133 13.7 18.1 76
OWL CREEK 8975 .3 1.4 21 11.8 10.1 117
POWDER RIVER PASS 9480 6.2 5.8 107 15.5 18.4 84
SHELL CREEK 9580 14.4 14.8 97 16.5 19.3 85
SYLVAN LAKE 8420 10.9 17.6 62 23.1 27.4 84
SYLVAN ROAD 7120 .0 1.1 0* 16.5 22.4 74
TIMBER CREEK 7950 2.7 1.5 180 14.3 13.2 108
YOUNTS PEAK 8350 9.3 13.0 72 13.6 20.9 65
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Basin wide percent of average 89 86
SHOSHONE RIVER
BLACKWATER 9780 22.2 28.5 78 22.5 27.4 82
EVENING STAR 9200 18.6 31.0 60 26.6 32.8 81
KIRWIN 9550 11.7 9.7 121 16.5 16.4 101
MARQUETTE 8760 12.9 7.4 174 17.8 16.6 107
SYLVAN LAKE 8420 10.9 17.6 62 23.1 27.4 84
SYLVAN ROAD 7120 .0 1.1 0* 16.5 22.4 74
YOUNTS PEAK 8350 9.3 13.0 72 13.6 20.9 65
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Basin wide percent of average 79 83
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.5 .0 * 13.3 13.1 102
BIG GOOSE 7990 11.1 7.6 146 18.8 15.4 122
BONE SPRINGS DIV 9350 12.9 14.0 92 15.6 21.0 74
BURGESS JUNCTION 7880 11.9 7.6 157 16.9 17.6 96
CLOUD PEAK RESERVOIR 9860 17.7 12.8 138 20.1 20.2 100
DOME LAKE 8880 11.9 7.8 153 19.8 19.5 102
GRAVE SPRINGS 8550 9.5 4.4 216 17.4 15.2 114
HANSEN SAWMILL 8360 2.3 1.0 230 14.5 13.0 112
MIDDLE POWDER 7760 10.5 7.9 133 13.7 18.1 76
POWDER RIVER PASS 9480 6.2 5.8 107 15.5 18.4 84
SUCKER CREEK 8880 15.5 8.1 191 21.8 20.3 107
TIE CREEK 6870 3.2 .5 640* 18.8 16.1 117
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Basin wide percent of average 147 99
BELLE FOURCHE
BLIND PARK 6890 .3 .0 * 18.8 16.6 113
COLE CANYON 5910 .0 .1 0* 17.8 11.8 151
NORTH RAPID CREEK 6130 .2 .1 200* 17.7 13.2 134
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Basin wide percent of average 250* 131
UPPER N. PLATTE RIVER
COLUMBINE 9160 13.0 8.7 149 30.9 31.3 99
DIVIDE PEAK 8880 15.5 9.3 167 31.6 26.5 119
ELK RIVER 8700 8.1 4.6 176 27.4 25.1 109
JOE WRIGHT 10120 -M 22.2 * -M 33.4 *
NORTH FRENCH CREEK 10130 43.9 30.9 142 45.3 32.9 138
OLD BATTLE 10000 43.7 32.8 133 47.2 43.0 110
SAGE CREEK BASIN 7850 .0 5.4 0 17.4 15.4 113
SOUTH BRUSH CREEK 8440 7.0 4.5 156 27.3 22.6 121
TOWER 10500 45.0 49.6 91 45.4 48.6 93
WEBBER SPRINGS 9250 22.6 13.9 163 36.8 33.6 110
WILLOW CREEK PASS 9540 12.7 8.4 151 18.5 17.7 105
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Basin wide percent of average 126 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.9 19.3 124 30.2 29.9 101
CASPER MTN. 7900 11.8 8.7 136 21.3 22.7 94
DEADMAN HILL 10220 -M 16.1 * -M 23.5 *
DEER PARK 9700 21.6 15.9 136 28.2 29.7 95
LAPRELE CREEK 8375 1.3 2.3 57 19.3 19.0 102
RENO HILL 8400 16.1 7.1 227 27.0 23.4 115
ROACH 9700 20.9 10.6 197 29.8 25.1 119
SAND LAKE 10050 40.4 33.2 122 41.3 32.8 126
SOUTH PASS 9040 18.1 11.0 165 26.2 25.1 104
WINDY PEAK 7900 2.1 .9 233 19.1 15.9 120
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Basin wide percent of average 143 108
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 20.3 20.2 100
DIVIDE PEAK 8880 15.5 9.3 167 31.6 26.5 119
OLD BATTLE 10000 43.7 32.8 133 47.2 43.0 110
SANDSTONE RS 8150 -M 2.0 * 23.3 23.9 97
WHISKEY PARK 8950 27.5 22.8 121 40.8 36.7 111
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Basin wide percent of average 134 109
UPPER GREEN RIVER
BIG SANDY OPENING 9080 4.4 6.5 68 13.3 17.7 75
BLIND BULL SUM 8650 17.8 22.9 78 17.2 27.1 63
EAST RIM DIVIDE 7930 .6 6.7 9 9.8 15.3 64
ELKHART PARK G.S. 9400 4.9 7.4 66 12.2 18.0 68
GROS VENTRE SUMMIT 8750 5.1 7.9 65 12.9 16.8 77
GUNSIGHT PASS 9820 10.8 -M * 15.7 -M *
KENDALL R.S. 7740 .4 .5 80* 11.7 17.9 65
LOOMIS PARK 8240 .7 7.2 10 13.7 21.7 63
NEW FORK LAKE 8340 .2 1.6 13 9.2 15.0 61
POCKET CREEK 9360 7.5 -M * 14.8 -M *
SNIDER BASIN 8060 2.9 4.9 59 16.1 19.8 81
SPRING CREEK DIVIDE 9000 20.9 21.7 96 24.1 32.2 75
TRIPLE PEAK 8500 13.9 13.1 106 27.5 30.9 89
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Basin wide percent of average 72 72
LOWER GREEN RIVER
HAMS FORK 7840 .6 .0 * 14.8 16.3 91
HEWINTA 9519 4.3 2.6 165 17.9 19.5 92
HICKERSON PARK 9145 .0 .9 0 15.5 11.8 131
HOLE-IN-ROCK 9150 .0 .7 0* 15.2 11.4 133
INDIAN CREEK 9425 20.0 20.9 96 23.4 31.5 74
KELLEY R.S. 8180 5.5 6.5 85 18.6 25.4 73
STEEL CREEK PARK 10200 21.0 16.4 128 22.4 22.2 101
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Basin wide percent of average 107 93
UPPER BEAR RIVER
BUG LAKE 7950 7.9 7.5 105 19.9 24.3 82
HAYDEN FORK 9212 1.9 4.8 40 24.3 27.4 89
KELLEY R.S. 8180 5.5 6.5 85 18.6 25.4 73
LILY LAKE 9156 8.3 4.3 193 20.5 23.1 89
MONTE CRISTO 8960 17.1 19.4 88 25.9 32.9 79
SALT RIVER SUMMIT 7760 .8 2.0 40 16.7 23.3 72
TRIAL LAKE 9992 18.9 20.5 92 22.1 32.1 69
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Basin wide percent of average 93 79
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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.