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 7 , 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 8.7 10.4 84 23.8 24.8 96
COTTONWOOD CREEK 7670 26.8 17.9 150 38.4 32.6 118
GRAND TARGHEE 9260 55.9 -M * 42.2 -M *
GRANITE CREEK 6770 11.0 11.2 98 25.2 22.8 111
GRASSY LAKE 7265 31.7 31.3 101 42.4 41.6 102
GROS VENTRE SUMMIT 8750 14.0 12.3 114 19.0 15.7 121
GUNSIGHT PASS 9820 18.2 -M * 20.6 -M *
LEWIS LAKE DIVIDE 7850 37.4 33.0 113 41.3 42.3 98
PHILLIPS BENCH 8200 31.4 28.0 112 35.6 33.7 106
SALT RIVER SUMMIT 7760 12.6 8.8 143 20.4 22.0 93
SNAKE RIVER STATION 6920 11.8 10.1 117 28.3 26.0 109
SPRING CREEK DIVIDE 9000 33.5 27.7 121 32.6 30.7 106
THUMB DIVIDE 7980 20.6 13.2 156 26.6 22.5 118
TOGWOTEE PASS 9580 32.8 28.1 117 35.9 29.6 121
TWO OCEAN PLATEAU 9240 46.6 31.7 147 36.4 32.8 111
WILLOW CREEK 8380 36.0 29.2 123 48.1 38.6 125
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Basin wide percent of average 121 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.7 25.8 107 25.8 24.1 107
BLACK BEAR 8170 43.9 39.0 113 44.7 46.6 96
CANYON 7870 15.1 9.8 154 19.6 18.2 108
FISHER CREEK 9100 42.8 37.7 114 42.4 42.7 99
MADISON PLATEAU 7750 25.7 22.7 113 31.6 31.0 102
NORTHEAST ENTRANCE 7350 3.7 5.7 65 16.9 15.2 111
PARKER PEAK 9400 33.4 24.4 137 23.5 20.1 117
SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116
THUMB DIVIDE 7980 20.6 13.2 156 26.6 22.5 118
TWO OCEAN PLATEAU 9240 46.6 31.7 147 36.4 32.8 111
WHISKEY CREEK 6800 18.8 13.4 140 26.3 24.7 106
WHITE MILL 8700 29.6 26.0 114 29.8 31.9 93
WOLVERINE 7650 8.4 5.9 142 16.1 15.7 103
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Basin wide percent of average 122 105
WIND RIVER
BURROUGHS CREEK 8750 19.2 12.3 156 21.5 19.9 108
COLD SPRINGS 9630 8.7 4.6 189 15.4 14.5 106
DEER PARK 9700 15.2 16.7 91 22.7 27.6 82
HOBBS PARK 10100 18.2 17.6 103 20.7 17.7 117
LITTLE WARM 9370 13.3 9.8 136 19.4 17.4 111
SOUTH PASS 9040 14.8 16.9 88 20.0 23.4 85
ST. LAWRENCE ALT 8620 6.3 5.3 119 14.6 12.7 115
TOGWOTEE PASS 9580 32.8 28.1 117 35.9 29.6 121
TOWNSEND CREEK 8700 10.4 7.8 133 17.3 16.1 107
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Basin wide percent of average 117 105
BIGHORN BASIN
BALD MTN. 9380 21.2 23.4 91 18.9 22.1 86
BEAR TRAP MEADOW 8200 4.5 1.8 250 12.1 11.5 105
BLACKWATER 9780 31.6 28.7 110 28.9 25.4 114
BONE SPRINGS DIV 9350 18.6 17.6 106 17.8 19.0 94
EVENING STAR 9200 34.4 33.2 104 37.9 30.6 124
GRAVE SPRINGS 8550 8.8 10.1 87 12.4 13.8 90
KIRWIN 9550 15.8 12.6 125 19.2 14.8 130
MARQUETTE 8760 8.5 10.6 80 12.5 14.4 87
MIDDLE POWDER 7760 11.2 13.3 84 12.8 16.4 78
OWL CREEK 8975 3.8 3.5 109 9.9 8.7 114
POWDER RIVER PASS 9480 12.7 9.6 132 18.6 16.5 113
SHELL CREEK 9580 19.1 16.7 114 19.3 17.5 110
SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116
SYLVAN ROAD 7120 5.2 6.5 80 23.9 21.0 114
TIMBER CREEK 7950 4.3 4.2 102 11.9 11.2 106
YOUNTS PEAK 8350 21.3 17.6 121 20.2 19.3 105
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Basin wide percent of average 105 106
SHOSHONE RIVER
BLACKWATER 9780 31.6 28.7 110 28.9 25.4 114
EVENING STAR 9200 34.4 33.2 104 37.9 30.6 124
KIRWIN 9550 15.8 12.6 125 19.2 14.8 130
MARQUETTE 8760 8.5 10.6 80 12.5 14.4 87
SYLVAN LAKE 8420 23.7 22.7 104 29.5 25.4 116
SYLVAN ROAD 7120 5.2 6.5 80 23.9 21.0 114
YOUNTS PEAK 8350 21.3 17.6 121 20.2 19.3 105
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Basin wide percent of average 107 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 4.5 1.8 250 12.1 11.5 105
BIG GOOSE 7990 10.2 10.8 94 16.0 13.6 118
BONE SPRINGS DIV 9350 18.6 17.6 106 17.8 19.0 94
BURGESS JUNCTION 7880 12.8 12.3 104 15.6 16.0 98
CLOUD PEAK RESERVOIR 9860 19.6 15.8 124 21.1 17.9 118
DOME LAKE 8880 12.2 12.4 98 19.1 17.5 109
GRAVE SPRINGS 8550 8.8 10.1 87 12.4 13.8 90
HANSEN SAWMILL 8360 2.6 4.1 63 13.0 11.5 113
MIDDLE POWDER 7760 11.2 13.3 84 12.8 16.4 78
POWDER RIVER PASS 9480 12.7 9.6 132 18.6 16.5 113
SUCKER CREEK 8880 15.5 11.9 130 20.7 18.2 114
TIE CREEK 6870 2.1 3.2 66 17.4 14.2 123
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Basin wide percent of average 106 106
BELLE FOURCHE
BLIND PARK 6890 -M 3.0 * 17.4 14.8 118
COLE CANYON 5910 2.8 2.8 100 15.3 10.2 150
NORTH RAPID CREEK 6130 .0 2.1 0 17.0 11.9 143
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Basin wide percent of average 57 135
UPPER N. PLATTE RIVER
COLUMBINE 9160 15.1 18.6 81 32.9 29.8 110
DIVIDE PEAK 8880 25.1 17.4 144 33.5 24.9 135
ELK RIVER 8700 9.6 12.5 77 25.8 23.6 109
JOE WRIGHT 10120 27.5 25.0 110 34.8 31.0 112
NORTH FRENCH CREEK 10130 40.6 34.5 118 39.6 30.6 129
OLD BATTLE 10000 41.5 37.3 111 47.3 40.7 116
SAGE CREEK BASIN 7850 6.8 10.1 67 19.5 14.4 135
SOUTH BRUSH CREEK 8440 7.4 9.6 77 22.8 20.8 110
TOWER 10500 52.0 52.4 99 50.6 46.2 110
WEBBER SPRINGS 9250 23.4 23.3 100 35.8 31.8 113
WILLOW CREEK PASS 9540 13.1 13.7 96 15.8 16.2 98
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Basin wide percent of average 103 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 26.1 27.2 96 28.1 27.8 101
CASPER MTN. 7900 12.8 15.7 82 17.5 20.4 86
DEADMAN HILL 10220 22.4 19.6 114 23.7 21.7 109
DEER PARK 9700 15.2 16.7 91 22.7 27.6 82
LAPRELE CREEK 8375 7.5 5.9 127 16.8 17.1 98
RENO HILL 8400 14.2 13.3 107 21.4 21.1 101
ROACH 9700 17.0 17.3 98 24.2 23.2 104
SAND LAKE 10050 37.2 37.0 101 36.8 30.3 121
SOUTH PASS 9040 14.8 16.9 88 20.0 23.4 85
WINDY PEAK 7900 7.3 3.7 197 15.0 14.1 106
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Basin wide percent of average 101 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 3.2 0 23.0 19.1 120
DIVIDE PEAK 8880 25.1 17.4 144 33.5 24.9 135
OLD BATTLE 10000 41.5 37.3 111 47.3 40.7 116
SANDSTONE RS 8150 9.2 7.5 123 25.3 22.4 113
WHISKEY PARK 8950 32.0 29.7 108 40.8 34.7 118
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Basin wide percent of average 113 120
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.0 12.2 107 16.7 16.4 102
BLIND BULL SUM 8650 32.4 27.1 120 25.2 25.7 98
EAST RIM DIVIDE 7930 3.3 12.1 27 14.7 14.2 104
ELKHART PARK G.S. 9400 14.2 11.8 120 18.9 16.5 115
GROS VENTRE SUMMIT 8750 14.0 12.3 114 19.0 15.7 121
GUNSIGHT PASS 9820 18.2 -M * 20.6 -M *
KENDALL R.S. 7740 4.6 8.0 57 17.2 16.9 102
LOOMIS PARK 8240 12.1 12.9 94 22.1 20.4 108
NEW FORK LAKE 8340 8.3 7.0 119 14.0 13.8 101
SNIDER BASIN 8060 11.2 11.2 100 18.1 18.9 96
SPRING CREEK DIVIDE 9000 33.5 27.7 121 32.6 30.7 106
TRIPLE PEAK 8500 23.8 21.9 109 33.1 29.3 113
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Basin wide percent of average 104 106
LOWER GREEN RIVER
HAMS FORK 7840 3.8 4.3 88 15.9 15.2 105
HEWINTA 9519 .9 7.6 12 17.3 18.3 95
HICKERSON PARK 9145 1.1 4.4 25 13.4 10.6 126
HOLE-IN-ROCK 9150 .6 3.6 17 12.8 10.2 125
INDIAN CREEK 9425 -M 27.1 * 27.2 30.0 91
KELLEY R.S. 8180 14.1 12.5 113 22.1 24.0 92
STEEL CREEK PARK 10200 16.8 18.9 89 21.0 20.8 101
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Basin wide percent of average 73 100
UPPER BEAR RIVER
BUG LAKE 7950 15.5 15.7 99 22.0 22.9 96
HAYDEN FORK 9212 7.1 11.1 64 27.4 25.7 107
KELLEY R.S. 8180 14.1 12.5 113 22.1 24.0 92
LILY LAKE 9156 8.2 9.5 86 21.6 21.6 100
MONTE CRISTO 8960 25.5 26.6 96 32.0 31.0 103
SALT RIVER SUMMIT 7760 12.6 8.8 143 20.4 22.0 93
TRIAL LAKE 9992 25.4 25.9 98 29.8 30.1 99
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Basin wide percent of average 98 99
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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.