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 TUESDAY: DECEMBER 11 , 2007
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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 4.5 5.3 85 10.8 7.4 146
COTTONWOOD CREEK 7670 3.9 6.1 64 7.4 9.6 77
GRAND TARGHEE 9260 15.8 -M * 13.3 -M *
GRANITE CREEK 6770 2.5 4.6 54 8.2 6.6 124
GRASSY LAKE 7265 7.2 9.7 74 14.8 11.8 125
GROS VENTRE SUMMIT 8750 4.9 4.8 102 6.5 4.9 133
GUNSIGHT PASS 9820 3.2 -M * 6.1 -M *
LEWIS LAKE DIVIDE 7850 8.9 9.8 91 14.2 12.2 116
PHILLIPS BENCH 8200 6.3 8.3 76 10.8 9.2 117
SALT RIVER SUMMIT 7760 .8 3.4 24 3.3 6.1 54
SNAKE RIVER STATION 6920 3.1 5.2 60 10.7 7.9 135
SPRING CREEK DIVIDE 9000 4.4 8.6 51 5.8 9.0 64
THUMB DIVIDE 7980 3.4 5.1 67 7.5 6.5 115
TOGWOTEE PASS 9580 10.3 8.4 123 11.8 8.7 136
TWO OCEAN PLATEAU 9240 14.0 9.9 141 13.5 9.9 136
WILLOW CREEK 8380 5.2 9.6 54 10.8 11.2 96
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Basin wide percent of average 80 112
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 10.3 8.4 123 10.1 7.2 140
BLACK BEAR 8170 12.0 12.0 100 14.7 12.6 117
CANYON 7870 4.9 4.1 120 8.1 5.7 142
FISHER CREEK 9100 16.0 11.6 138 15.3 12.0 128
MADISON PLATEAU 7750 7.1 7.8 91 11.1 9.0 123
NORTHEAST ENTRANCE 7350 1.7 3.3 52 6.0 4.8 125
PARKER PEAK 9400 9.6 7.9 122 9.9 6.4 155
SYLVAN LAKE 8420 6.7 7.7 87 10.9 8.4 130
THUMB DIVIDE 7980 3.4 5.1 67 7.5 6.5 115
TWO OCEAN PLATEAU 9240 14.0 9.9 141 13.5 9.9 136
WHISKEY CREEK 6800 4.0 4.9 82 9.3 7.1 131
WHITE MILL 8700 10.6 8.1 131 11.3 9.4 120
WOLVERINE 7650 2.9 3.9 74 6.4 5.3 121
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Basin wide percent of average 109 129
WIND RIVER
BURROUGHS CREEK 8750 6.8 4.9 139 9.5 5.8 164
COLD SPRINGS 9630 1.1 3.7 30 4.1 4.7 87
DEER PARK 9700 2.5 5.1 49 5.9 8.2 72
HOBBS PARK 10100 2.9 6.2 47 4.6 5.2 88
LITTLE WARM 9370 3.3 4.1 80 5.7 5.2 110
SOUTH PASS 9040 1.9 6.1 31 5.2 7.1 73
ST. LAWRENCE ALT 8620 1.3 3.1 42 3.0 3.8 79
TOGWOTEE PASS 9580 10.3 8.4 123 11.8 8.7 136
TOWNSEND CREEK 8700 1.2 3.4 35 4.3 5.0 86
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Basin wide percent of average 70 101
BIGHORN BASIN
BALD MTN. 9380 4.9 6.9 71 5.7 6.2 92
BEAR TRAP MEADOW 8200 2.2 2.0 110 3.6 3.8 95
BLACKWATER 9780 10.4 9.4 111 9.9 8.4 118
BONE SPRINGS DIV 9350 4.7 6.0 78 5.6 5.6 100
EVENING STAR 9200 11.2 10.4 108 13.5 9.6 141
GRAVE SPRINGS 8550 2.4 2.9 83 4.2 4.0 105
KIRWIN 9550 5.9 4.8 123 7.1 4.7 151
MARQUETTE 8760 .3 4.2 7 4.5 4.5 100
MIDDLE POWDER 7760 2.7 4.0 68 3.8 5.5 69
OWL CREEK 8975 2.0 2.1 95 3.9 2.4 162
POWDER RIVER PASS 9480 3.3 3.9 85 5.2 4.7 111
SHELL CREEK 9580 6.5 5.6 116 7.1 5.2 137
SYLVAN LAKE 8420 6.7 7.7 87 10.9 8.4 130
SYLVAN ROAD 7120 3.2 4.4 73 10.6 7.9 134
TIMBER CREEK 7950 .7 2.5 28 4.6 3.3 139
YOUNTS PEAK 8350 6.4 5.8 110 9.2 6.0 153
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Basin wide percent of average 89 121
SHOSHONE RIVER
BLACKWATER 9780 10.4 9.4 111 9.9 8.4 118
EVENING STAR 9200 11.2 10.4 108 13.5 9.6 141
KIRWIN 9550 5.9 4.8 123 7.1 4.7 151
MARQUETTE 8760 .3 4.2 7 4.5 4.5 100
SYLVAN LAKE 8420 6.7 7.7 87 10.9 8.4 130
SYLVAN ROAD 7120 3.2 4.4 73 10.6 7.9 134
YOUNTS PEAK 8350 6.4 5.8 110 9.2 6.0 153
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Basin wide percent of average 94 133
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.2 2.0 110 3.6 3.8 95
BIG GOOSE 7990 2.9 2.9 100 5.7 3.5 163
BONE SPRINGS DIV 9350 4.7 6.0 78 5.6 5.6 100
BURGESS JUNCTION 7880 2.8 3.9 72 5.1 4.8 106
CLOUD PEAK RESERVOIR 9860 4.8 4.3 112 6.7 5.3 126
DOME LAKE 8880 3.3 4.7 70 6.7 5.5 122
GRAVE SPRINGS 8550 2.4 2.9 83 4.2 4.0 105
HANSEN SAWMILL 8360 2.3 2.4 96 4.6 3.5 131
MIDDLE POWDER 7760 2.7 4.0 68 3.8 5.5 69
POWDER RIVER PASS 9480 3.3 3.9 85 5.2 4.7 111
SUCKER CREEK 8880 3.3 3.7 89 4.8 5.1 94
TIE CREEK 6870 .4 1.3 31 4.2 4.1 102
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Basin wide percent of average 84 109
BELLE FOURCHE
BLIND PARK 6890 1.2 2.2 55 3.1 5.0 62
COLE CANYON 5910 .5 2.4 21 2.3 3.2 72
NORTH RAPID CREEK 6130 1.8 2.1 86 2.4 4.2 57
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Basin wide percent of average 52 63
UPPER N. PLATTE RIVER
COLUMBINE 9160 4.3 6.3 68 7.9 7.9 100
DIVIDE PEAK 8880 6.5 6.2 105 7.5 7.3 103
ELK RIVER 8700 4.7 4.1 115 7.3 6.3 116
JOE WRIGHT 10120 7.2 7.2 100 9.5 9.0 106
NORTH FRENCH CREEK 10130 9.2 9.4 98 10.4 8.8 118
OLD BATTLE 10000 8.9 10.8 82 11.3 11.3 100
SAGE CREEK BASIN 7850 3.5 3.6 97 5.8 4.3 135
SOUTH BRUSH CREEK 8440 4.0 3.5 114 7.1 5.9 120
TOWER 10500 9.4 15.1 62 12.3 12.8 96
WEBBER SPRINGS 9250 6.5 8.1 80 9.2 9.3 99
WILLOW CREEK PASS 9540 5.8 4.2 138 6.6 5.0 132
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Basin wide percent of average 89 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 6.3 7.3 86 7.7 7.3 105
CASPER MTN. 7900 1.7 5.4 31 5.3 5.9 90
DEADMAN HILL 10220 6.0 5.8 103 6.0 6.1 98
DEER PARK 9700 2.5 5.1 49 5.9 8.2 72
LAPRELE CREEK 8375 .7 3.8 18 3.6 4.8 75
RENO HILL 8400 3.0 5.0 60 5.1 5.7 89
ROACH 9700 5.9 5.2 113 7.7 6.2 124
SAND LAKE 10050 9.1 11.0 83 9.7 8.5 114
SOUTH PASS 9040 1.9 6.1 31 5.2 7.1 73
WINDY PEAK 7900 1.7 2.7 63 3.4 4.3 79
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Basin wide percent of average 68 93
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.6 2.3 113 5.4 5.2 104
DIVIDE PEAK 8880 6.5 6.2 105 7.5 7.3 103
OLD BATTLE 10000 8.9 10.8 82 11.3 11.3 100
SANDSTONE RS 8150 2.9 3.1 94 6.5 6.4 102
WHISKEY PARK 8950 6.4 7.5 85 9.7 9.4 103
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Basin wide percent of average 91 102
UPPER GREEN RIVER
BIG SANDY OPENING 9080 2.7 4.9 55 3.6 5.0 72
BLIND BULL SUM 8650 5.4 8.9 61 5.8 7.9 73
EAST RIM DIVIDE 7930 .9 4.0 22 3.6 4.1 88
ELKHART PARK G.S. 9400 2.6 4.3 60 3.9 5.1 76
GROS VENTRE SUMMIT 8750 4.9 4.8 102 6.5 4.9 133
GUNSIGHT PASS 9820 3.2 -M * 6.1 -M *
KENDALL R.S. 7740 2.1 4.2 50 4.6 4.8 96
LOOMIS PARK 8240 3.2 5.5 58 5.0 5.9 85
NEW FORK LAKE 8340 2.0 3.6 56 3.2 4.4 73
SNIDER BASIN 8060 1.4 4.6 30 3.2 5.5 58
SPRING CREEK DIVIDE 9000 4.4 8.6 51 5.8 9.0 64
TRIPLE PEAK 8500 5.2 8.0 65 7.9 7.9 100
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Basin wide percent of average 57 82
LOWER GREEN RIVER
HAMS FORK 7840 -M 3.3 * 2.7 4.2 64
HEWINTA 9519 .7 2.6 27 5.7 5.6 102
HICKERSON PARK 9145 .8 1.9 42 3.6 3.5 103
HOLE-IN-ROCK 9150 .7 1.8 39 4.1 3.3 124
INDIAN CREEK 9425 3.7 8.4 44 4.7 8.5 55
KELLEY R.S. 8180 1.7 5.3 32 4.4 6.9 64
STEEL CREEK PARK 10200 2.4 4.8 50 6.3 5.9 107
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Basin wide percent of average 40 83
UPPER BEAR RIVER
BUG LAKE 7950 -M 5.2 * 3.1 6.8 46
HAYDEN FORK 9212 2.7 3.9 69 5.7 7.3 78
KELLEY R.S. 8180 1.7 5.3 32 4.4 6.9 64
LILY LAKE 9156 1.5 3.6 42 5.4 6.6 82
MONTE CRISTO 8960 3.9 6.7 58 6.0 8.8 68
SALT RIVER SUMMIT 7760 .8 3.4 24 3.3 6.1 54
TRIAL LAKE 9992 4.3 7.0 61 5.9 8.0 74
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Basin wide percent of average 50 67
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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.