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 SUNDAY: MAY 17 , 2009
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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 2.3 6.1 38 24.3 25.7 95
COTTONWOOD CREEK 7670 19.9 13.4 149 38.5 34.0 113
GRAND TARGHEE 9260 48.5 -M * 42.5 -M *
GRANITE CREEK 6770 5.1 7.5 68 25.6 23.6 108
GRASSY LAKE 7265 23.6 25.9 91 43.1 43.0 100
GROS VENTRE SUMMIT 8750 10.0 9.6 104 19.4 16.5 118
GUNSIGHT PASS 9820 17.5 -M * 20.9 -M *
LEWIS LAKE DIVIDE 7850 34.0 28.4 120 42.1 43.6 97
PHILLIPS BENCH 8200 26.2 23.6 111 36.2 34.9 104
SALT RIVER SUMMIT 7760 6.0 4.4 136 20.4 22.9 89
SNAKE RIVER STATION 6920 4.0 5.2 77 28.9 27.0 107
SPRING CREEK DIVIDE 9000 29.5 24.2 122 32.8 31.7 103
THUMB DIVIDE 7980 15.1 9.3 162 27.5 23.5 117
TOGWOTEE PASS 9580 32.8 27.2 121 36.5 30.9 118
TWO OCEAN PLATEAU 9240 48.4 30.5 159 37.8 34.2 111
WILLOW CREEK 8380 29.8 24.7 121 48.5 40.3 120
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Basin wide percent of average 119 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.6 25.4 109 27.5 25.3 109
BLACK BEAR 8170 41.5 36.1 115 45.3 48.2 94
CANYON 7870 12.3 6.8 181 20.3 19.1 106
FISHER CREEK 9100 45.6 36.3 126 45.0 44.3 102
MADISON PLATEAU 7750 23.1 19.1 121 32.2 32.2 100
NORTHEAST ENTRANCE 7350 .0 2.9 0 17.9 16.1 111
PARKER PEAK 9400 31.6 23.8 133 24.5 21.3 115
SYLVAN LAKE 8420 21.8 20.0 109 30.6 26.7 115
THUMB DIVIDE 7980 15.1 9.3 162 27.5 23.5 117
TWO OCEAN PLATEAU 9240 48.4 30.5 159 37.8 34.2 111
WHISKEY CREEK 6800 14.9 9.3 160 26.7 25.7 104
WHITE MILL 8700 30.0 24.4 123 31.7 33.2 95
WOLVERINE 7650 1.4 2.8 50 17.2 16.8 102
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Basin wide percent of average 127 105
WIND RIVER
BURROUGHS CREEK 8750 16.7 10.1 165 21.9 21.0 104
COLD SPRINGS 9630 3.1 3.1 100 15.7 15.6 101
DEER PARK 9700 12.4 17.0 73 23.1 29.0 80
HOBBS PARK 10100 16.5 16.4 101 20.9 19.1 109
LITTLE WARM 9370 9.4 7.4 127 19.8 18.5 107
SOUTH PASS 9040 10.3 13.6 76 20.0 24.6 81
ST. LAWRENCE ALT 8620 -M 3.4 * 14.6 13.8 106
TOGWOTEE PASS 9580 32.8 27.2 121 36.5 30.9 118
TOWNSEND CREEK 8700 5.0 5.4 93 17.3 17.3 100
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Basin wide percent of average 106 100
BIGHORN BASIN
BALD MTN. 9380 22.0 22.8 96 19.9 23.5 85
BEAR TRAP MEADOW 8200 .2 .6 33 12.5 12.6 99
BLACKWATER 9780 33.4 28.8 116 30.9 26.8 115
BONE SPRINGS DIV 9350 18.4 16.0 115 19.0 20.4 93
EVENING STAR 9200 33.6 32.2 104 40.0 32.1 125
GRAVE SPRINGS 8550 6.1 7.3 84 12.5 14.7 85
KIRWIN 9550 13.5 10.8 125 19.9 15.9 125
MARQUETTE 8760 7.2 8.7 83 13.6 15.9 86
MIDDLE POWDER 7760 9.5 10.6 90 13.4 17.6 76
OWL CREEK 8975 .1 2.1 5 10.3 9.6 107
POWDER RIVER PASS 9480 11.9 7.8 153 19.5 17.8 110
SHELL CREEK 9580 19.4 16.1 120 20.4 18.8 109
SYLVAN LAKE 8420 21.8 20.0 109 30.6 26.7 115
SYLVAN ROAD 7120 .2 2.5 8 25.4 21.9 116
TIMBER CREEK 7950 .3 2.1 14 12.0 12.5 96
YOUNTS PEAK 8350 19.4 15.0 129 20.8 20.4 102
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Basin wide percent of average 107 104
SHOSHONE RIVER
BLACKWATER 9780 33.4 28.8 116 30.9 26.8 115
EVENING STAR 9200 33.6 32.2 104 40.0 32.1 125
KIRWIN 9550 13.5 10.8 125 19.9 15.9 125
MARQUETTE 8760 7.2 8.7 83 13.6 15.9 86
SYLVAN LAKE 8420 21.8 20.0 109 30.6 26.7 115
SYLVAN ROAD 7120 .2 2.5 8 25.4 21.9 116
YOUNTS PEAK 8350 19.4 15.0 129 20.8 20.4 102
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Basin wide percent of average 109 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .2 .6 33 12.5 12.6 99
BIG GOOSE 7990 8.8 8.9 99 16.6 14.9 111
BONE SPRINGS DIV 9350 18.4 16.0 115 19.0 20.4 93
BURGESS JUNCTION 7880 11.3 9.7 116 16.1 17.1 94
CLOUD PEAK RESERVOIR 9860 18.9 14.6 129 21.9 19.5 112
DOME LAKE 8880 9.5 10.0 95 19.8 18.9 105
GRAVE SPRINGS 8550 6.1 7.3 84 12.5 14.7 85
HANSEN SAWMILL 8360 -M 1.9 * 13.2 12.5 106
MIDDLE POWDER 7760 9.5 10.6 90 13.4 17.6 76
POWDER RIVER PASS 9480 11.9 7.8 153 19.5 17.8 110
SUCKER CREEK 8880 14.2 9.8 145 21.5 19.7 109
TIE CREEK 6870 .0 1.2 0 17.7 15.5 114
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Basin wide percent of average 113 101
BELLE FOURCHE
BLIND PARK 6890 -M .0 * 18.1 16.0 113
COLE CANYON 5910 .1 .7 14 15.4 11.3 136
NORTH RAPID CREEK 6130 .0 .5 0 17.5 12.8 137
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Basin wide percent of average 8 127
UPPER N. PLATTE RIVER
COLUMBINE 9160 2.8 12.4 23 33.1 30.8 107
DIVIDE PEAK 8880 15.5 12.2 127 33.4 26.0 128
ELK RIVER 8700 .1 7.0 1 25.4 24.6 103
JOE WRIGHT 10120 21.8 23.6 92 34.9 32.6 107
NORTH FRENCH CREEK 10130 35.7 32.9 109 39.7 32.2 123
OLD BATTLE 10000 37.6 35.1 107 47.4 42.3 112
SAGE CREEK BASIN 7850 .0 7.1 0 19.4 15.1 128
SOUTH BRUSH CREEK 8440 .0 6.2 0 22.8 22.0 104
TOWER 10500 47.2 51.3 92 50.9 47.9 106
WEBBER SPRINGS 9250 15.4 17.4 89 35.8 33.1 108
WILLOW CREEK PASS 9540 7.4 10.8 69 16.1 17.2 94
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Basin wide percent of average 85 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 19.3 22.5 86 28.4 29.3 97
CASPER MTN. 7900 8.2 11.2 73 17.5 22.0 80
DEADMAN HILL 10220 18.3 17.8 103 23.8 23.0 103
DEER PARK 9700 12.4 17.0 73 23.1 29.0 80
LAPRELE CREEK 8375 1.5 3.4 44 16.9 18.4 92
RENO HILL 8400 9.8 9.2 107 21.5 22.7 95
ROACH 9700 10.4 13.0 80 24.2 24.5 99
SAND LAKE 10050 33.8 35.2 96 37.0 32.0 116
SOUTH PASS 9040 10.3 13.6 76 20.0 24.6 81
WINDY PEAK 7900 .7 1.5 47 15.5 15.3 101
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Basin wide percent of average 86 95
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .3 0 22.9 19.9 115
DIVIDE PEAK 8880 15.5 12.2 127 33.4 26.0 128
OLD BATTLE 10000 37.6 35.1 107 47.4 42.3 112
SANDSTONE RS 8150 .0 3.4 0 25.4 23.5 108
WHISKEY PARK 8950 25.7 26.0 99 40.7 36.1 113
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Basin wide percent of average 102 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 7.1 8.6 83 16.8 17.3 97
BLIND BULL SUM 8650 31.0 24.6 126 25.6 26.7 96
EAST RIM DIVIDE 7930 .0 8.8 0 14.8 15.0 99
ELKHART PARK G.S. 9400 11.0 9.1 121 19.0 17.5 109
GROS VENTRE SUMMIT 8750 10.0 9.6 104 19.4 16.5 118
GUNSIGHT PASS 9820 17.5 -M * 20.9 -M *
KENDALL R.S. 7740 .1 3.2 3 17.5 17.6 99
LOOMIS PARK 8240 6.3 9.3 68 22.4 21.2 106
NEW FORK LAKE 8340 1.2 3.5 34 14.8 14.6 101
SNIDER BASIN 8060 4.7 7.2 65 18.1 19.5 93
SPRING CREEK DIVIDE 9000 29.5 24.2 122 32.8 31.7 103
TRIPLE PEAK 8500 18.0 16.5 109 33.7 30.4 111
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Basin wide percent of average 95 103
LOWER GREEN RIVER
HAMS FORK 7840 .1 .7 14 16.0 15.9 101
HEWINTA 9519 .0 4.1 0 17.2 19.1 90
HICKERSON PARK 9145 .0 1.9 0 13.4 11.4 118
HOLE-IN-ROCK 9150 .0 1.5 0 12.7 11.0 115
INDIAN CREEK 9425 -M 23.3 * 27.5 31.1 88
KELLEY R.S. 8180 8.3 8.7 95 22.2 24.9 89
STEEL CREEK PARK 10200 9.1 17.9 51 21.0 21.7 97
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Basin wide percent of average 50 96
UPPER BEAR RIVER
BUG LAKE 7950 8.3 10.3 81 22.0 23.8 92
HAYDEN FORK 9212 .2 6.9 3 27.3 26.9 101
KELLEY R.S. 8180 8.3 8.7 95 22.2 24.9 89
LILY LAKE 9156 .0 6.0 0 21.5 22.7 95
MONTE CRISTO 8960 17.6 22.1 80 32.0 32.3 99
SALT RIVER SUMMIT 7760 6.0 4.4 136 20.4 22.9 89
TRIAL LAKE 9992 15.6 22.8 68 29.7 31.5 94
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Basin wide percent of average 69 95
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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.