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 THURSDAY: MAY 20 , 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 4.7 0 16.1 26.0 62
COTTONWOOD CREEK 7670 12.2 12.0 102 28.3 34.4 82
GRAND TARGHEE 9260 43.4 -M * 35.5 -M *
GRANITE CREEK 6770 .0 6.3 0 16.0 23.9 67
GRASSY LAKE 7265 14.1 24.0 59 31.4 43.4 72
GROS VENTRE SUMMIT 8750 5.3 8.6 62 12.2 16.7 73
GUNSIGHT PASS 9820 10.6 -M * 15.2 -M *
LEWIS LAKE DIVIDE 7850 14.2 26.8 53 26.3 43.9 60
PHILLIPS BENCH 8200 13.3 22.0 60 24.9 35.2 71
SALT RIVER SUMMIT 7760 1.8 3.0 60 16.4 23.1 71
SNAKE RIVER STATION 6920 .0 3.7 0 19.7 27.2 72
SPRING CREEK DIVIDE 9000 21.0 22.8 92 23.6 32.0 74
THUMB DIVIDE 7980 .2 8.0 3 16.6 23.7 70
TOGWOTEE PASS 9580 22.6 26.6 85 -M 31.3 *
TWO OCEAN PLATEAU 9240 24.5 29.8 82 22.3 34.7 64
WILLOW CREEK 8380 18.9 23.1 82 35.9 40.8 88
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Basin wide percent of average 67 72
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.9 24.8 68 18.2 25.7 71
BLACK BEAR 8170 22.7 34.9 65 31.7 48.6 65
CANYON 7870 2.9 5.6 52 14.4 19.3 75
FISHER CREEK 9100 24.3 35.4 69 29.7 44.8 66
MADISON PLATEAU 7750 12.6 17.5 72 25.4 32.6 78
NORTHEAST ENTRANCE 7350 .0 1.9 0 12.0 16.4 73
PARKER PEAK 9400 18.4 23.4 79 17.3 21.7 80
SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83
THUMB DIVIDE 7980 .2 8.0 3 16.6 23.7 70
TWO OCEAN PLATEAU 9240 24.5 29.8 82 22.3 34.7 64
WHISKEY CREEK 6800 4.5 7.7 58 16.2 26.0 62
WHITE MILL 8700 16.8 23.7 71 20.7 33.6 62
WOLVERINE 7650 .0 1.8 0 9.8 17.1 57
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Basin wide percent of average 67 69
WIND RIVER
BURROUGHS CREEK 8750 9.7 9.3 104 13.2 21.3 62
COLD SPRINGS 9630 7.8 2.6 300 18.4 15.9 116
DEER PARK 9700 21.9 16.6 132 28.0 29.4 95
HOBBS PARK 10100 25.9 15.8 164 27.5 19.5 141
LITTLE WARM 9370 8.9 6.3 141 14.5 18.8 77
SOUTH PASS 9040 18.4 12.1 152 25.9 24.9 104
ST. LAWRENCE ALT 8620 7.4 2.6 285 19.5 14.1 138
TOGWOTEE PASS 9580 22.6 26.6 85 -M 31.3 *
TOWNSEND CREEK 8700 14.8 4.7 315 24.5 17.6 139
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Basin wide percent of average 142 106
BIGHORN BASIN
BALD MTN. 9380 17.7 22.3 79 16.0 23.9 67
BEAR TRAP MEADOW 8200 2.5 .2 1250* 12.9 12.9 100
BLACKWATER 9780 22.3 28.8 77 22.3 27.2 82
BONE SPRINGS DIV 9350 13.4 15.1 89 15.5 20.8 75
EVENING STAR 9200 18.7 31.7 59 26.4 32.5 81
GRAVE SPRINGS 8550 10.3 5.7 181 17.4 15.0 116
KIRWIN 9550 12.1 10.2 119 16.2 16.2 100
MARQUETTE 8760 13.6 8.1 168 17.7 16.3 109
MIDDLE POWDER 7760 11.4 9.1 125 13.6 17.9 76
OWL CREEK 8975 1.2 1.8 67 11.7 9.9 118
POWDER RIVER PASS 9480 7.1 6.8 104 15.3 18.1 85
SHELL CREEK 9580 14.5 15.4 94 16.2 19.1 85
SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83
SYLVAN ROAD 7120 .0 1.7 0 16.3 22.2 73
TIMBER CREEK 7950 3.3 1.8 183 14.1 12.9 109
YOUNTS PEAK 8350 10.0 13.9 72 13.3 20.7 64
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Basin wide percent of average 89 86
SHOSHONE RIVER
BLACKWATER 9780 22.3 28.8 77 22.3 27.2 82
EVENING STAR 9200 18.7 31.7 59 26.4 32.5 81
KIRWIN 9550 12.1 10.2 119 16.2 16.2 100
MARQUETTE 8760 13.6 8.1 168 17.7 16.3 109
SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83
SYLVAN ROAD 7120 .0 1.7 0 16.3 22.2 73
YOUNTS PEAK 8350 10.0 13.9 72 13.3 20.7 64
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Basin wide percent of average 78 83
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.5 .2 1250* 12.9 12.9 100
BIG GOOSE 7990 11.9 8.2 145 18.5 15.2 122
BONE SPRINGS DIV 9350 13.4 15.1 89 15.5 20.8 75
BURGESS JUNCTION 7880 12.8 8.6 149 16.7 17.4 96
CLOUD PEAK RESERVOIR 9860 18.4 13.9 132 19.9 20.0 100
DOME LAKE 8880 12.7 8.9 143 19.6 19.2 102
GRAVE SPRINGS 8550 10.3 5.7 181 17.4 15.0 116
HANSEN SAWMILL 8360 3.6 1.4 257 14.3 12.8 112
MIDDLE POWDER 7760 11.4 9.1 125 13.6 17.9 76
POWDER RIVER PASS 9480 7.1 6.8 104 15.3 18.1 85
SUCKER CREEK 8880 16.6 8.8 189 21.8 20.0 109
TIE CREEK 6870 4.5 .7 643 18.8 15.8 119
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Basin wide percent of average 143 100
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 18.5 16.4 113
COLE CANYON 5910 .0 .3 0* 17.6 11.6 152
NORTH RAPID CREEK 6130 .0 .2 0* 17.1 13.0 132
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Basin wide percent of average 0* 130
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.0 10.2 157 30.7 31.1 99
DIVIDE PEAK 8880 18.0 10.4 173 31.5 26.3 120
ELK RIVER 8700 11.6 5.5 211 27.2 24.9 109
JOE WRIGHT 10120 25.8 22.8 113 31.2 33.1 94
NORTH FRENCH CREEK 10130 -M 31.8 * -M 32.6 *
OLD BATTLE 10000 43.2 33.8 128 46.9 42.7 110
SAGE CREEK BASIN 7850 .1 6.0 2 17.2 15.3 112
SOUTH BRUSH CREEK 8440 9.8 5.1 192 26.8 22.4 120
TOWER 10500 45.2 50.4 90 44.7 48.3 93
WEBBER SPRINGS 9250 23.7 15.3 155 36.6 33.4 110
WILLOW CREEK PASS 9540 14.1 9.4 150 18.3 17.5 105
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Basin wide percent of average 123 105
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.1 20.7 121 30.1 29.7 101
CASPER MTN. 7900 13.2 9.7 136 21.2 22.4 95
DEADMAN HILL 10220 -M 16.8 * -M 23.3 *
DEER PARK 9700 21.9 16.6 132 28.0 29.4 95
LAPRELE CREEK 8375 3.8 2.7 141 19.3 18.7 103
RENO HILL 8400 17.0 8.0 213 26.7 23.1 116
ROACH 9700 22.4 11.6 193 29.8 24.9 120
SAND LAKE 10050 41.0 34.1 120 40.8 32.5 126
SOUTH PASS 9040 18.4 12.1 152 25.9 24.9 104
WINDY PEAK 7900 4.6 1.1 418 18.7 15.7 119
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Basin wide percent of average 144 109
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 20.2 20.1 100
DIVIDE PEAK 8880 18.0 10.4 173 31.5 26.3 120
OLD BATTLE 10000 43.2 33.8 128 46.9 42.7 110
SANDSTONE RS 8150 .0 2.5 0 23.1 23.7 97
WHISKEY PARK 8950 27.5 24.2 114 40.6 36.5 111
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Basin wide percent of average 125 109
UPPER GREEN RIVER
BIG SANDY OPENING 9080 -M 7.4 * 13.0 17.5 74
BLIND BULL SUM 8650 18.2 23.6 77 16.9 27.0 63
EAST RIM DIVIDE 7930 .2 7.6 3 9.4 15.2 62
ELKHART PARK G.S. 9400 5.3 8.1 65 11.8 17.8 66
GROS VENTRE SUMMIT 8750 5.3 8.6 62 12.2 16.7 73
GUNSIGHT PASS 9820 10.6 -M * 15.2 -M *
KENDALL R.S. 7740 .1 1.6 6 11.3 17.8 63
LOOMIS PARK 8240 .2 8.1 2 13.2 21.5 61
NEW FORK LAKE 8340 .0 2.3 0 9.1 14.9 61
POCKET CREEK 9360 7.5 -M * 14.5 -M *
SNIDER BASIN 8060 4.1 5.9 69 15.7 19.7 80
SPRING CREEK DIVIDE 9000 21.0 22.8 92 23.6 32.0 74
TRIPLE PEAK 8500 14.9 14.5 103 27.2 30.7 89
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Basin wide percent of average 67 71
LOWER GREEN RIVER
HAMS FORK 7840 .3 .0 * 14.1 16.1 88
HEWINTA 9519 6.8 3.2 213 17.8 19.4 92
HICKERSON PARK 9145 .0 1.2 0 15.3 11.7 131
HOLE-IN-ROCK 9150 .0 1.0 0 15.1 11.2 135
INDIAN CREEK 9425 19.2 21.9 88 22.6 31.4 72
KELLEY R.S. 8180 5.5 7.4 74 17.6 25.2 70
STEEL CREEK PARK 10200 21.1 17.1 123 22.3 22.0 101
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Basin wide percent of average 102 91
UPPER BEAR RIVER
BUG LAKE 7950 8.3 8.6 97 19.3 24.1 80
HAYDEN FORK 9212 4.1 5.7 72 24.3 27.2 89
KELLEY R.S. 8180 5.5 7.4 74 17.6 25.2 70
LILY LAKE 9156 9.9 5.0 198 20.4 22.9 89
MONTE CRISTO 8960 16.7 20.5 81 25.1 32.7 77
SALT RIVER SUMMIT 7760 1.8 3.0 60 16.4 23.1 71
TRIAL LAKE 9992 19.5 21.5 91 22.0 31.8 69
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Basin wide percent of average 92 78
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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.