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 31 , 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 .0 100* 17.9 26.9 67
COTTONWOOD CREEK 7670 7.5 6.2 121 30.1 35.6 85
GRAND TARGHEE 9260 46.3 -M * 38.8 -M *
GRANITE CREEK 6770 .0 1.7 0* 16.8 24.8 68
GRASSY LAKE 7265 11.7 15.7 75 34.3 44.8 77
GROS VENTRE SUMMIT 8750 1.0 4.5 22 13.7 17.5 78
GUNSIGHT PASS 9820 9.7 -M * 16.6 -M *
LEWIS LAKE DIVIDE 7850 12.2 19.4 63 28.6 45.2 63
PHILLIPS BENCH 8200 10.0 15.3 65 25.9 36.4 71
SALT RIVER SUMMIT 7760 .0 .0 100* 17.4 24.0 73
SNAKE RIVER STATION 6920 .0 .0 100* 21.4 28.2 76
SPRING CREEK DIVIDE 9000 19.2 16.3 118 25.5 32.9 78
THUMB DIVIDE 7980 .1 2.9 3 17.9 24.7 72
TOGWOTEE PASS 9580 22.6 22.8 99 -M 32.5 *
TWO OCEAN PLATEAU 9240 24.9 26.1 95 24.5 36.1 68
WILLOW CREEK 8380 17.9 15.8 113 39.2 42.3 93
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Basin wide percent of average 87 75
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.4 21.1 78 19.4 26.8 72
BLACK BEAR 8170 22.9 27.6 83 35.2 50.0 70
CANYON 7870 .6 2.0 30 16.0 20.3 79
FISHER CREEK 9100 27.8 30.8 90 32.5 46.4 70
MADISON PLATEAU 7750 10.4 10.2 102 27.7 34.1 81
NORTHEAST ENTRANCE 7350 .0 .5 0* 13.7 17.4 79
PARKER PEAK 9400 16.2 19.4 84 19.1 23.0 83
SYLVAN LAKE 8420 10.2 12.7 80 25.1 28.7 87
THUMB DIVIDE 7980 .1 2.9 3 17.9 24.7 72
TWO OCEAN PLATEAU 9240 24.9 26.1 95 24.5 36.1 68
WHISKEY CREEK 6800 .0 1.8 0 18.5 27.1 68
WHITE MILL 8700 16.1 19.0 85 22.7 35.0 65
WOLVERINE 7650 .0 .0 100* 10.5 18.1 58
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Basin wide percent of average 84 73
WIND RIVER
BURROUGHS CREEK 8750 6.1 4.2 145 -M 22.4 *
COLD SPRINGS 9630 3.0 1.1 273 19.2 16.9 114
DEER PARK 9700 18.6 9.2 202 28.9 30.7 94
HOBBS PARK 10100 24.1 10.9 221 28.6 20.8 138
LITTLE WARM 9370 4.5 2.4 188 15.6 19.8 79
SOUTH PASS 9040 12.8 7.3 175 26.6 25.9 103
ST. LAWRENCE ALT 8620 .0 .7 0* 20.3 15.0 135
TOGWOTEE PASS 9580 22.6 22.8 99 -M 32.5 *
TOWNSEND CREEK 8700 8.3 2.0 415 25.4 18.6 137
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Basin wide percent of average 165 111
BIGHORN BASIN
BALD MTN. 9380 18.8 17.5 107 19.4 25.1 77
BEAR TRAP MEADOW 8200 .1 .0 * 15.2 14.0 109
BLACKWATER 9780 21.7 25.5 85 23.5 28.6 82
BONE SPRINGS DIV 9350 13.0 9.4 138 18.3 22.1 83
EVENING STAR 9200 18.1 27.4 66 28.2 34.1 83
GRAVE SPRINGS 8550 5.1 2.2 232 19.0 15.9 119
KIRWIN 9550 8.0 6.2 129 17.2 17.3 99
MARQUETTE 8760 9.8 4.7 209 18.4 17.7 104
MIDDLE POWDER 7760 4.8 3.5 137 15.3 18.9 81
OWL CREEK 8975 .0 .6 0 13.2 10.9 121
POWDER RIVER PASS 9480 5.1 2.9 176 18.4 19.4 95
SHELL CREEK 9580 14.9 11.4 131 19.6 20.3 97
SYLVAN LAKE 8420 10.2 12.7 80 25.1 28.7 87
SYLVAN ROAD 7120 .0 .2 0* 17.9 23.1 77
TIMBER CREEK 7950 .2 .7 29 15.9 14.2 112
YOUNTS PEAK 8350 6.2 8.1 77 14.3 21.9 65
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Basin wide percent of average 102 90
SHOSHONE RIVER
BLACKWATER 9780 21.7 25.5 85 23.5 28.6 82
EVENING STAR 9200 18.1 27.4 66 28.2 34.1 83
KIRWIN 9550 8.0 6.2 129 17.2 17.3 99
MARQUETTE 8760 9.8 4.7 209 18.4 17.7 104
SYLVAN LAKE 8420 10.2 12.7 80 25.1 28.7 87
SYLVAN ROAD 7120 .0 .2 0* 17.9 23.1 77
YOUNTS PEAK 8350 6.2 8.1 77 14.3 21.9 65
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Basin wide percent of average 87 84
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .0 * 15.2 14.0 109
BIG GOOSE 7990 6.7 3.9 172 20.2 16.3 124
BONE SPRINGS DIV 9350 13.0 9.4 138 18.3 22.1 83
BURGESS JUNCTION 7880 8.4 3.5 240 18.8 18.3 103
CLOUD PEAK RESERVOIR 9860 15.7 8.7 180 22.2 21.5 103
DOME LAKE 8880 7.3 3.9 187 21.4 20.4 105
GRAVE SPRINGS 8550 5.1 2.2 232 19.0 15.9 119
HANSEN SAWMILL 8360 .1 .3 33* 16.0 13.9 115
MIDDLE POWDER 7760 4.8 3.5 137 15.3 18.9 81
POWDER RIVER PASS 9480 5.1 2.9 176 18.4 19.4 95
SUCKER CREEK 8880 13.1 4.3 305 23.9 21.3 112
TIE CREEK 6870 .0 .0 100* 20.5 17.0 121
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Basin wide percent of average 186 105
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 20.3 17.7 115
COLE CANYON 5910 .0 .0 100* 19.8 12.7 156
NORTH RAPID CREEK 6130 .1 .0 * 18.4 13.8 133
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Basin wide percent of average * 132
UPPER N. PLATTE RIVER
COLUMBINE 9160 .2 2.9 7 30.7 32.1 96
DIVIDE PEAK 8880 5.6 4.5 124 32.6 27.3 119
ELK RIVER 8700 .0 1.7 0* 27.3 25.8 106
JOE WRIGHT 10120 17.9 18.1 99 31.5 34.6 91
NORTH FRENCH CREEK 10130 38.2 25.4 150 46.1 34.1 135
OLD BATTLE 10000 38.1 27.1 141 48.3 44.0 110
SAGE CREEK BASIN 7850 .0 2.6 0 18.3 15.8 116
SOUTH BRUSH CREEK 8440 .1 2.1 5 28.1 23.5 120
TOWER 10500 36.3 44.2 82 45.7 49.8 92
WEBBER SPRINGS 9250 14.9 7.8 191 37.4 34.5 108
WILLOW CREEK PASS 9540 4.9 4.0 123 18.3 18.6 98
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Basin wide percent of average 111 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.4 13.0 126 30.6 30.9 99
CASPER MTN. 7900 5.2 4.8 108 21.9 23.8 92
DEADMAN HILL 10220 21.6 12.3 176 26.9 24.5 110
DEER PARK 9700 18.6 9.2 202 28.9 30.7 94
LAPRELE CREEK 8375 .0 1.0 0* 19.7 19.9 99
RENO HILL 8400 7.6 4.0 190 27.6 24.5 113
ROACH 9700 11.2 6.7 167 29.9 26.2 114
SAND LAKE 10050 35.6 27.4 130 42.0 34.0 124
SOUTH PASS 9040 12.8 7.3 175 26.6 25.9 103
WINDY PEAK 7900 .2 .2 100* 20.1 16.9 119
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Basin wide percent of average 150 107
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 20.8 20.8 100
DIVIDE PEAK 8880 5.6 4.5 124 32.6 27.3 119
OLD BATTLE 10000 38.1 27.1 141 48.3 44.0 110
SANDSTONE RS 8150 -M .3 * 23.8 24.6 97
WHISKEY PARK 8950 19.8 15.3 129 41.4 37.6 110
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Basin wide percent of average 135 108
UPPER GREEN RIVER
BIG SANDY OPENING 9080 -M 2.4 * 13.8 18.4 75
BLIND BULL SUM 8650 17.8 18.8 95 18.7 28.0 67
EAST RIM DIVIDE 7930 .1 2.5 4 10.1 15.9 64
ELKHART PARK G.S. 9400 .4 4.1 10 12.6 18.9 67
GROS VENTRE SUMMIT 8750 1.0 4.5 22 13.7 17.5 78
GUNSIGHT PASS 9820 9.7 -M * 16.6 -M *
KENDALL R.S. 7740 .1 .0 * 12.1 18.5 65
LOOMIS PARK 8240 .1 3.2 3 14.1 22.3 63
NEW FORK LAKE 8340 .0 .0 100* 10.3 15.7 66
POCKET CREEK 9360 4.5 -M * 15.4 -M *
SNIDER BASIN 8060 .0 .5 0* 16.5 20.3 81
SPRING CREEK DIVIDE 9000 19.2 16.3 118 25.5 32.9 78
TRIPLE PEAK 8500 9.6 6.4 150 28.8 31.8 91
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Basin wide percent of average 86 73
LOWER GREEN RIVER
HAMS FORK 7840 .3 .0 * 15.5 16.9 92
HEWINTA 9519 .0 .8 0* 18.1 20.2 90
HICKERSON PARK 9145 .0 .1 0* 16.0 12.5 128
HOLE-IN-ROCK 9150 .0 .1 0* 15.5 12.1 128
INDIAN CREEK 9425 18.4 15.9 116 24.6 32.3 76
KELLEY R.S. 8180 2.2 2.4 92 19.7 26.1 75
STEEL CREEK PARK 10200 18.8 12.7 148 22.7 23.0 99
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Basin wide percent of average 124* 92
UPPER BEAR RIVER
BUG LAKE 7950 5.1 3.3 155 21.7 25.0 87
HAYDEN FORK 9212 .1 1.9 5 24.9 28.3 88
KELLEY R.S. 8180 2.2 2.4 92 19.7 26.1 75
LILY LAKE 9156 .1 1.8 6 21.0 23.9 88
MONTE CRISTO 8960 16.5 13.8 120 28.3 33.9 83
SALT RIVER SUMMIT 7760 .0 .0 100* 17.4 24.0 73
TRIAL LAKE 9992 13.7 15.7 87 23.3 33.1 70
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Basin wide percent of average 97 80
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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.