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 WEDNESDAY: MAY 6 , 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 8.9 10.8 82 23.3 24.7 94
COTTONWOOD CREEK 7670 26.5 18.3 145 38.2 32.5 118
GRAND TARGHEE 9260 55.7 -M * 42.1 -M *
GRANITE CREEK 6770 11.1 11.5 97 25.0 22.7 110
GRASSY LAKE 7265 32.0 31.7 101 42.0 41.5 101
GROS VENTRE SUMMIT 8750 13.9 12.5 111 18.9 15.6 121
GUNSIGHT PASS 9820 17.9 -M * 20.3 -M *
LEWIS LAKE DIVIDE 7850 37.1 33.3 111 40.8 42.2 97
PHILLIPS BENCH 8200 31.2 28.3 110 35.4 33.6 105
SALT RIVER SUMMIT 7760 13.0 9.2 141 20.4 21.9 93
SNAKE RIVER STATION 6920 12.1 10.5 115 28.1 25.9 108
SPRING CREEK DIVIDE 9000 33.2 27.9 119 32.4 30.6 106
THUMB DIVIDE 7980 20.6 13.6 151 26.4 22.4 118
TOGWOTEE PASS 9580 32.6 28.1 116 35.6 29.5 121
TWO OCEAN PLATEAU 9240 46.4 31.7 146 36.1 32.7 110
WILLOW CREEK 8380 36.2 29.5 123 47.9 38.4 125
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Basin wide percent of average 120 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.0 26.0 104 25.2 24.0 105
BLACK BEAR 8170 43.4 39.2 111 44.3 46.5 95
CANYON 7870 15.1 10.1 150 19.4 18.1 107
FISHER CREEK 9100 41.7 37.6 111 41.7 42.6 98
MADISON PLATEAU 7750 25.6 23.1 111 31.1 30.9 101
NORTHEAST ENTRANCE 7350 3.8 5.9 64 16.6 15.1 110
PARKER PEAK 9400 33.1 24.5 135 23.3 20.0 116
SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116
THUMB DIVIDE 7980 20.6 13.6 151 26.4 22.4 118
TWO OCEAN PLATEAU 9240 46.4 31.7 146 36.1 32.7 110
WHISKEY CREEK 6800 18.7 13.8 136 25.9 24.6 105
WHITE MILL 8700 28.8 26.2 110 29.0 31.8 91
WOLVERINE 7650 8.4 6.2 135 15.6 15.6 100
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Basin wide percent of average 120 104
WIND RIVER
BURROUGHS CREEK 8750 19.0 12.6 151 21.4 19.8 108
COLD SPRINGS 9630 8.9 4.6 193 15.3 14.4 106
DEER PARK 9700 15.3 17.2 89 22.6 27.5 82
HOBBS PARK 10100 18.1 17.7 102 20.5 17.5 117
LITTLE WARM 9370 13.2 10.0 132 19.2 17.3 111
SOUTH PASS 9040 15.1 17.2 88 19.9 23.3 85
ST. LAWRENCE ALT 8620 6.8 5.4 126 14.5 12.6 115
TOGWOTEE PASS 9580 32.6 28.1 116 35.6 29.5 121
TOWNSEND CREEK 8700 10.9 8.0 136 17.3 16.0 108
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Basin wide percent of average 116 105
BIGHORN BASIN
BALD MTN. 9380 21.0 23.5 89 18.9 21.9 86
BEAR TRAP MEADOW 8200 5.0 1.9 263 12.2 11.4 107
BLACKWATER 9780 31.1 28.7 108 28.6 25.3 113
BONE SPRINGS DIV 9350 18.5 17.8 104 17.7 18.9 94
EVENING STAR 9200 33.5 33.2 101 37.3 30.5 122
GRAVE SPRINGS 8550 9.2 10.4 88 12.4 13.6 91
KIRWIN 9550 15.7 12.7 124 19.1 14.7 130
MARQUETTE 8760 8.7 10.7 81 12.5 14.3 87
MIDDLE POWDER 7760 11.7 13.6 86 12.8 16.3 79
OWL CREEK 8975 4.1 3.6 114 9.9 8.6 115
POWDER RIVER PASS 9480 12.8 9.8 131 18.6 16.3 114
SHELL CREEK 9580 18.9 16.6 114 19.1 17.4 110
SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116
SYLVAN ROAD 7120 5.5 7.0 79 23.6 20.9 113
TIMBER CREEK 7950 4.6 4.5 102 11.8 11.0 107
YOUNTS PEAK 8350 21.0 17.8 118 19.9 19.2 104
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Basin wide percent of average 104 106
SHOSHONE RIVER
BLACKWATER 9780 31.1 28.7 108 28.6 25.3 113
EVENING STAR 9200 33.5 33.2 101 37.3 30.5 122
KIRWIN 9550 15.7 12.7 124 19.1 14.7 130
MARQUETTE 8760 8.7 10.7 81 12.5 14.3 87
SYLVAN LAKE 8420 23.4 23.0 102 29.2 25.2 116
SYLVAN ROAD 7120 5.5 7.0 79 23.6 20.9 113
YOUNTS PEAK 8350 21.0 17.8 118 19.9 19.2 104
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Basin wide percent of average 104 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 5.0 1.9 263 12.2 11.4 107
BIG GOOSE 7990 10.4 11.0 95 16.0 13.5 119
BONE SPRINGS DIV 9350 18.5 17.8 104 17.7 18.9 94
BURGESS JUNCTION 7880 13.0 12.6 103 15.6 15.9 98
CLOUD PEAK RESERVOIR 9860 19.5 16.0 122 21.0 17.8 118
DOME LAKE 8880 12.2 12.6 97 19.0 17.4 109
GRAVE SPRINGS 8550 9.2 10.4 88 12.4 13.6 91
HANSEN SAWMILL 8360 3.2 4.2 76 13.0 11.4 114
MIDDLE POWDER 7760 11.7 13.6 86 12.8 16.3 79
POWDER RIVER PASS 9480 12.8 9.8 131 18.6 16.3 114
SUCKER CREEK 8880 15.7 12.2 129 20.7 18.0 115
TIE CREEK 6870 2.6 3.4 76 17.4 14.0 124
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Basin wide percent of average 107 106
BELLE FOURCHE
BLIND PARK 6890 -M 3.4 * 17.3 14.7 118
COLE CANYON 5910 3.4 3.2 106 15.1 10.1 150
NORTH RAPID CREEK 6130 .0 2.4 0 16.9 11.8 143
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Basin wide percent of average 61 135
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.8 19.1 88 32.9 29.6 111
DIVIDE PEAK 8880 25.9 17.9 145 33.5 24.8 135
ELK RIVER 8700 11.1 13.0 85 25.7 23.5 109
JOE WRIGHT 10120 27.6 25.1 110 34.8 30.8 113
NORTH FRENCH CREEK 10130 40.8 34.5 118 39.6 30.4 130
OLD BATTLE 10000 41.5 37.3 111 47.2 40.6 116
SAGE CREEK BASIN 7850 8.0 10.4 77 19.5 14.4 135
SOUTH BRUSH CREEK 8440 8.5 9.9 86 22.7 20.7 110
TOWER 10500 52.1 52.4 99 50.5 46.0 110
WEBBER SPRINGS 9250 24.0 23.7 101 35.8 31.7 113
WILLOW CREEK PASS 9540 13.6 13.8 99 15.8 16.1 98
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Basin wide percent of average 105 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 26.5 27.5 96 27.9 27.7 101
CASPER MTN. 7900 13.4 16.1 83 17.6 20.3 87
DEADMAN HILL 10220 23.0 19.6 117 23.7 21.5 110
DEER PARK 9700 15.3 17.2 89 22.6 27.5 82
LAPRELE CREEK 8375 8.0 6.1 131 16.8 17.0 99
RENO HILL 8400 14.7 13.6 108 21.4 20.9 102
ROACH 9700 17.8 17.6 101 24.2 23.0 105
SAND LAKE 10050 37.5 37.0 101 36.6 30.1 122
SOUTH PASS 9040 15.1 17.2 88 19.9 23.3 85
WINDY PEAK 7900 8.2 3.9 210 14.9 14.0 106
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Basin wide percent of average 102 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 3.5 0 23.0 19.0 121
DIVIDE PEAK 8880 25.9 17.9 145 33.5 24.8 135
OLD BATTLE 10000 41.5 37.3 111 47.2 40.6 116
SANDSTONE RS 8150 10.8 7.9 137 25.4 22.3 114
WHISKEY PARK 8950 32.3 30.0 108 40.8 34.6 118
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Basin wide percent of average 114 120
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.9 12.4 104 16.4 16.3 101
BLIND BULL SUM 8650 31.8 27.2 117 24.9 25.6 97
EAST RIM DIVIDE 7930 3.7 12.3 30 14.7 14.2 104
ELKHART PARK G.S. 9400 14.8 12.1 122 18.8 16.4 115
GROS VENTRE SUMMIT 8750 13.9 12.5 111 18.9 15.6 121
GUNSIGHT PASS 9820 17.9 -M * 20.3 -M *
KENDALL R.S. 7740 4.9 8.4 58 17.0 16.8 101
LOOMIS PARK 8240 12.3 13.2 93 22.0 20.3 108
NEW FORK LAKE 8340 8.5 7.3 116 14.0 13.7 102
SNIDER BASIN 8060 11.6 11.5 101 17.9 18.8 95
SPRING CREEK DIVIDE 9000 33.2 27.9 119 32.4 30.6 106
TRIPLE PEAK 8500 23.7 22.3 106 32.4 29.1 111
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Basin wide percent of average 103 106
LOWER GREEN RIVER
HAMS FORK 7840 4.5 4.7 96 15.6 15.1 103
HEWINTA 9519 2.4 8.0 30 17.3 18.2 95
HICKERSON PARK 9145 2.2 4.7 47 13.4 10.5 128
HOLE-IN-ROCK 9150 1.8 3.9 46 12.8 10.1 127
INDIAN CREEK 9425 -M 27.3 * 27.0 29.9 90
KELLEY R.S. 8180 14.4 12.8 112 22.0 24.0 92
STEEL CREEK PARK 10200 17.3 18.9 92 21.0 20.7 101
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Basin wide percent of average 80 100
UPPER BEAR RIVER
BUG LAKE 7950 16.2 16.2 100 22.0 22.8 96
HAYDEN FORK 9212 8.4 11.5 73 27.4 25.6 107
KELLEY R.S. 8180 14.4 12.8 112 22.0 24.0 92
LILY LAKE 9156 9.5 9.8 97 21.6 21.5 100
MONTE CRISTO 8960 26.4 27.0 98 32.0 30.9 104
SALT RIVER SUMMIT 7760 13.0 9.2 141 20.4 21.9 93
TRIAL LAKE 9992 26.0 26.0 100 29.8 30.0 99
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Basin wide percent of average 101 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.