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 16 , 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 3.4 6.5 52 24.3 25.6 95
COTTONWOOD CREEK 7670 20.6 13.9 148 38.5 33.9 114
GRAND TARGHEE 9260 52.8 -M * 42.4 -M *
GRANITE CREEK 6770 5.9 7.8 76 25.5 23.6 108
GRASSY LAKE 7265 25.1 26.5 95 43.0 42.9 100
GROS VENTRE SUMMIT 8750 10.5 9.9 106 19.4 16.4 118
GUNSIGHT PASS 9820 18.1 -M * 20.9 -M *
LEWIS LAKE DIVIDE 7850 35.3 29.0 122 42.1 43.4 97
PHILLIPS BENCH 8200 27.1 24.1 112 36.1 34.8 104
SALT RIVER SUMMIT 7760 7.0 4.9 143 20.4 22.8 89
SNAKE RIVER STATION 6920 5.5 5.7 96 28.9 26.9 107
SPRING CREEK DIVIDE 9000 30.5 24.7 123 32.8 31.6 104
THUMB DIVIDE 7980 16.2 9.7 167 27.5 23.4 118
TOGWOTEE PASS 9580 33.2 27.4 121 36.5 30.8 119
TWO OCEAN PLATEAU 9240 48.7 30.7 159 37.8 34.1 111
WILLOW CREEK 8380 30.9 25.3 122 48.5 40.1 121
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Basin wide percent of average 122 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 28.6 25.5 112 27.3 25.2 108
BLACK BEAR 8170 42.4 36.5 116 45.3 48.0 94
CANYON 7870 13.1 7.1 185 20.3 19.0 107
FISHER CREEK 9100 45.4 36.6 124 45.0 44.1 102
MADISON PLATEAU 7750 23.8 19.5 122 32.1 32.1 100
NORTHEAST ENTRANCE 7350 .0 3.3 0 17.8 16.0 111
PARKER PEAK 9400 32.6 24.0 136 24.5 21.2 116
SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115
THUMB DIVIDE 7980 16.2 9.7 167 27.5 23.4 118
TWO OCEAN PLATEAU 9240 48.7 30.7 159 37.8 34.1 111
WHISKEY CREEK 6800 15.7 9.8 160 26.7 25.6 104
WHITE MILL 8700 31.1 24.7 126 31.6 33.1 95
WOLVERINE 7650 2.5 3.2 78 16.9 16.7 101
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Basin wide percent of average 129 105
WIND RIVER
BURROUGHS CREEK 8750 17.4 10.4 167 21.9 20.9 105
COLD SPRINGS 9630 4.1 3.3 124 15.6 15.5 101
DEER PARK 9700 13.3 17.2 77 23.1 28.8 80
HOBBS PARK 10100 17.2 16.7 103 20.9 18.9 111
LITTLE WARM 9370 10.2 7.8 131 19.7 18.5 106
SOUTH PASS 9040 11.3 14.1 80 20.1 24.5 82
ST. LAWRENCE ALT 8620 -M 3.7 * 14.6 13.7 107
TOGWOTEE PASS 9580 33.2 27.4 121 36.5 30.8 119
TOWNSEND CREEK 8700 6.0 5.7 105 17.3 17.2 101
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Basin wide percent of average 110 100
BIGHORN BASIN
BALD MTN. 9380 22.3 23.0 97 19.8 23.4 85
BEAR TRAP MEADOW 8200 .2 .7 29 12.5 12.5 100
BLACKWATER 9780 33.4 28.8 116 30.8 26.6 116
BONE SPRINGS DIV 9350 18.9 16.2 117 18.8 20.3 93
EVENING STAR 9200 34.8 32.5 107 39.9 32.0 125
GRAVE SPRINGS 8550 6.7 7.9 85 12.6 14.6 86
KIRWIN 9550 14.0 11.0 127 19.8 15.8 125
MARQUETTE 8760 7.5 8.9 84 13.5 15.8 85
MIDDLE POWDER 7760 9.9 11.1 89 13.5 17.5 77
OWL CREEK 8975 .0 2.3 0 10.3 9.5 108
POWDER RIVER PASS 9480 12.5 8.1 154 19.5 17.6 111
SHELL CREEK 9580 19.6 16.3 120 20.3 18.6 109
SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115
SYLVAN ROAD 7120 .3 2.7 11 25.5 21.9 116
TIMBER CREEK 7950 .2 2.2 9 12.2 12.4 98
YOUNTS PEAK 8350 20.0 15.4 130 20.7 20.3 102
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Basin wide percent of average 107 105
SHOSHONE RIVER
BLACKWATER 9780 33.4 28.8 116 30.8 26.6 116
EVENING STAR 9200 34.8 32.5 107 39.9 32.0 125
KIRWIN 9550 14.0 11.0 127 19.8 15.8 125
MARQUETTE 8760 7.5 8.9 84 13.5 15.8 85
SYLVAN LAKE 8420 22.5 20.3 111 30.7 26.6 115
SYLVAN ROAD 7120 .3 2.7 11 25.5 21.9 116
YOUNTS PEAK 8350 20.0 15.4 130 20.7 20.3 102
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Basin wide percent of average 111 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .2 .7 29 12.5 12.5 100
BIG GOOSE 7990 9.2 9.1 101 16.5 14.8 111
BONE SPRINGS DIV 9350 18.9 16.2 117 18.8 20.3 93
BURGESS JUNCTION 7880 11.8 10.2 116 16.0 17.0 94
CLOUD PEAK RESERVOIR 9860 19.5 14.8 132 21.7 19.4 112
DOME LAKE 8880 10.1 10.4 97 19.8 18.8 105
GRAVE SPRINGS 8550 6.7 7.9 85 12.6 14.6 86
HANSEN SAWMILL 8360 .0 2.2 0 13.2 12.4 106
MIDDLE POWDER 7760 9.9 11.1 89 13.5 17.5 77
POWDER RIVER PASS 9480 12.5 8.1 154 19.5 17.6 111
SUCKER CREEK 8880 14.9 10.2 146 21.4 19.5 110
TIE CREEK 6870 .0 1.3 0 17.6 15.4 114
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Basin wide percent of average 111 102
BELLE FOURCHE
BLIND PARK 6890 -M .1 * 18.0 15.9 113
COLE CANYON 5910 .0 .8 0 15.0 11.2 134
NORTH RAPID CREEK 6130 .0 .6 0 17.4 12.7 137
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Basin wide percent of average 0 127
UPPER N. PLATTE RIVER
COLUMBINE 9160 4.4 13.1 34 33.2 30.7 108
DIVIDE PEAK 8880 16.9 12.8 132 33.4 25.9 129
ELK RIVER 8700 .1 7.6 1 25.7 24.5 105
JOE WRIGHT 10120 22.6 23.8 95 34.9 32.5 107
NORTH FRENCH CREEK 10130 36.6 33.2 110 39.7 32.0 124
OLD BATTLE 10000 38.2 35.5 108 47.4 42.2 112
SAGE CREEK BASIN 7850 .0 7.4 0 19.4 15.0 129
SOUTH BRUSH CREEK 8440 .1 6.5 2 22.8 21.9 104
TOWER 10500 47.9 51.5 93 51.0 47.7 107
WEBBER SPRINGS 9250 16.3 18.1 90 35.8 33.0 108
WILLOW CREEK PASS 9540 8.2 11.2 73 16.1 17.1 94
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Basin wide percent of average 87 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 20.4 23.1 88 28.4 29.2 97
CASPER MTN. 7900 8.9 11.7 76 17.5 21.8 80
DEADMAN HILL 10220 18.6 18.0 103 23.8 22.9 104
DEER PARK 9700 13.3 17.2 77 23.1 28.8 80
LAPRELE CREEK 8375 2.3 3.6 64 16.9 18.2 93
RENO HILL 8400 10.5 9.7 108 21.4 22.5 95
ROACH 9700 11.2 13.4 84 24.2 24.4 99
SAND LAKE 10050 34.4 35.5 97 36.9 31.8 116
SOUTH PASS 9040 11.3 14.1 80 20.1 24.5 82
WINDY PEAK 7900 1.0 1.7 59 15.3 15.2 101
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Basin wide percent of average 89 95
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .6 0 22.9 19.8 116
DIVIDE PEAK 8880 16.9 12.8 132 33.4 25.9 129
OLD BATTLE 10000 38.2 35.5 108 47.4 42.2 112
SANDSTONE RS 8150 .0 3.8 0 25.4 23.4 109
WHISKEY PARK 8950 27.4 26.5 103 40.8 36.0 113
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Basin wide percent of average 104 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.0 9.0 89 16.7 17.2 97
BLIND BULL SUM 8650 31.6 24.9 127 25.6 26.6 96
EAST RIM DIVIDE 7930 .0 9.2 0 14.7 14.9 99
ELKHART PARK G.S. 9400 12.1 9.4 129 18.9 17.4 109
GROS VENTRE SUMMIT 8750 10.5 9.9 106 19.4 16.4 118
GUNSIGHT PASS 9820 18.1 -M * 20.9 -M *
KENDALL R.S. 7740 .1 3.7 3 17.5 17.5 100
LOOMIS PARK 8240 7.4 9.7 76 22.4 21.2 106
NEW FORK LAKE 8340 2.5 3.8 66 14.5 14.5 100
SNIDER BASIN 8060 5.7 7.7 74 18.1 19.4 93
SPRING CREEK DIVIDE 9000 30.5 24.7 123 32.8 31.6 104
TRIPLE PEAK 8500 19.2 17.1 112 33.7 30.3 111
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Basin wide percent of average 99 103
LOWER GREEN RIVER
HAMS FORK 7840 .1 1.1 9 16.0 15.9 101
HEWINTA 9519 .0 4.5 0 17.3 19.0 91
HICKERSON PARK 9145 .0 2.1 0 13.3 11.4 117
HOLE-IN-ROCK 9150 .0 1.7 0 12.7 10.9 117
INDIAN CREEK 9425 -M 23.7 * 27.4 31.0 88
KELLEY R.S. 8180 9.3 9.1 102 22.1 24.9 89
STEEL CREEK PARK 10200 10.0 18.1 55 21.0 21.6 97
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Basin wide percent of average 53 96
UPPER BEAR RIVER
BUG LAKE 7950 9.4 10.9 86 22.0 23.8 92
HAYDEN FORK 9212 .1 7.3 1 27.3 26.8 102
KELLEY R.S. 8180 9.3 9.1 102 22.1 24.9 89
LILY LAKE 9156 .0 6.3 0 21.6 22.6 96
MONTE CRISTO 8960 18.7 22.7 82 32.0 32.2 99
SALT RIVER SUMMIT 7760 7.0 4.9 143 20.4 22.8 89
TRIAL LAKE 9992 16.8 23.2 72 29.7 31.3 95
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Basin wide percent of average 73 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.