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 MONDAY: DECEMBER 14 , 1998
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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 4.8 5.6 86 6.9 8.5 81
COTTONWOOD CREEK 7600 4.2 6.2 68 7.5 9.0 83
GRANITE CREEK 6770 3.3 5.2 63 5.2 8.9 58
GRASSY LAKE 7265 9.2 10.0 92 11.3 13.7 82
GROS VENTRE SUMMIT 8775 4.7 5.1 92 5.4 6.1 89
LEWIS LAKE DIVIDE 7860 9.3 9.8 95 11.8 13.9 85
PHILLIPS BENCH 8200 7.0 8.0 88 7.8 10.8 72
SALT RIVER SUMMIT 7600 2.1 3.3 64 4.8 6.4 75
SNAKE RIVER STATION 6920 4.9 5.5 89 7.1 9.6 74
SPRING CREEK DIVIDE 9000 5.6 8.6 65 6.8 9.9 69
THUMB DIVIDE 7980 7.7 5.2 148 8.2 7.9 104
TOGWOTEE PASS 9580 8.0 8.4 95 8.5 10.4 82
TWO OCEAN PLATEAU 9360 11.8 10.0 118 10.9 11.7 93
WILLOW CREEK 8450 6.7 9.3 72 12.1 11.8 103
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Basin wide percent of average 89 82
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 7.6 8.9 85 7.0 6.5 108
BLACK BEAR 7950 15.0 11.5 130 15.0 13.0 115
CANYON 7940 4.9 3.9 126 5.9 5.4 109
FISHER CREEK 9100 12.9 11.7 110 12.2 12.1 101
MADISON PLATEAU 7750 -M 7.4 * 11.3 8.9 127
NORTHEAST ENTRANCE 7350 2.5 2.8 89 4.4 4.6 96
PARKER PEAK 9400 7.3 8.9 82 -M 6.1 *
SYLVAN LAKE 8420 9.0 8.7 103 11.2 7.9 142
THUMB DIVIDE 7980 7.7 5.2 148 8.2 7.9 104
TWO OCEAN PLATEAU 9360 11.8 10.0 118 10.9 11.7 93
WHISKEY CREEK 6800 6.9 5.1 135 8.9 7.3 122
WHITE MILL 8700 7.7 8.3 93 7.8 9.7 80
WOLVERINE 7650 3.8 3.6 106 4.4 5.1 86
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Basin wide percent of average 110 107
WIND RIVER
BURROUGHS CREEK 8750 -M 5.3 * -M 6.4 *
COLD SPRINGS 9630 4.2 3.5 120 5.6 4.6 122
DEER PARK 9700 4.9 -M * 7.1 -M *
HOBBS PARK 10100 7.3 6.2 118 7.4 5.4 137
LITTLE WARM 9620 -M 4.1 * -M 5.4 *
SOUTH PASS 9040 4.7 6.7 70 6.5 6.4 102
ST. LAWRENCE ALT 8620 3.4 2.6 131 6.0 4.3 140
TOGWOTEE PASS 9580 8.0 8.4 95 8.5 10.4 82
TOWNSEND CREEK 8700 3.9 3.5 111 6.6 4.7 140
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Basin wide percent of average 102 113
BIGHORN BASIN
BALD MTN. 9375 5.5 7.9 70 5.8 6.6 88
BEAR TRAP MEADOW 7900 2.3 2.8 82 5.6 3.6 156
BLACKWATER 9780 11.3 7.6 149 10.2 6.9 148
BONE SPRINGS DIV 9350 4.5 6.3 71 5.1 5.4 94
EVENING STAR 9200 10.4 10.6 98 10.8 8.5 127
GRAVE SPRINGS 8550 2.5 3.6 69 5.6 4.2 133
KIRWIN 9550 4.8 4.2 114 5.4 4.3 126
MARQUETTE 8760 4.9 3.1 158 5.8 4.0 145
MIDDLE POWDER 7760 2.4 4.6 52 8.5 4.9 173
OWL CREEK 8975 2.9 1.4 207 3.9 2.3 170
POWDER RIVER PASS 9480 2.6 4.1 63 4.5 4.6 98
SHELL CREEK 9580 5.0 6.0 83 4.5 5.1 88
SYLVAN LAKE 8420 9.0 8.7 103 11.2 7.9 142
SYLVAN ROAD 8120 5.2 4.5 116 6.7 6.4 105
TIMBER CREEK 7950 2.8 1.8 156 4.4 2.8 157
YOUNTS PEAK 8350 5.9 7.0 84 5.5 6.3 87
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Basin wide percent of average 97 124
SHOSHONE RIVER
BLACKWATER 9780 11.3 7.6 149 10.2 6.9 148
EVENING STAR 9200 10.4 10.6 98 10.8 8.5 127
KIRWIN 9550 4.8 4.2 114 5.4 4.3 126
MARQUETTE 8760 4.9 3.1 158 5.8 4.0 145
SYLVAN LAKE 8420 9.0 8.7 103 11.2 7.9 142
SYLVAN ROAD 8120 5.2 4.5 116 6.7 6.4 105
YOUNTS PEAK 8350 5.9 7.0 84 5.5 6.3 87
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Basin wide percent of average 113 126
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.3 2.8 82 5.6 3.6 156
BIG GOOSE 7990 2.2 -M * 5.3 -M *
BONE SPRINGS DIV 9350 4.5 6.3 71 5.1 5.4 94
BURGESS JUNCTION 7880 2.4 4.4 55 4.6 4.6 100
CLOUD PEAK RESERVOIR 9860 4.3 4.4 98 6.0 5.1 118
DOME LAKE 8880 2.6 5.0 52 4.2 5.6 75
GRAVE SPRINGS 8550 2.5 3.6 69 5.6 4.2 133
HANSEN SAWMILL 8760 2.3 2.7 85 3.7 3.4 109
MIDDLE POWDER 7760 2.4 4.6 52 8.5 4.9 173
POWDER RIVER PASS 9480 2.6 4.1 63 4.5 4.6 98
SUCKER CREEK 8880 3.7 3.8 97 5.8 5.2 112
TIE CREEK 6870 .7 -M * 3.8 4.4 86
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Basin wide percent of average 71 113
BELLE FOURCHE
BLIND PARK 6890 1.2 4.2 29 7.7 3.9 197
NORTH RAPID CREEK 6130 1.4 -M * 8.1 -M *
WARREN PEAK 6520 1.7 4.2 40 7.6 3.2 238
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Basin wide percent of average 35 215
UPPER N. PLATTE RIVER
COLUMBINE 9400 3.3 7.0 47 6.4 8.1 79
DIVIDE PEAK 8800 5.5 7.5 73 11.8 8.9 133
ELK RIVER 8700 2.2 5.6 39 8.3 6.7 124
JOE WRIGHT 10120 6.5 8.4 77 9.6 9.4 102
NORTH FRENCH CREEK 10100 8.9 8.8 101 11.5 8.1 142
OLD BATTLE 10000 8.5 11.6 73 12.7 11.1 114
SOUTH BRUSH CREEK 8400 3.0 3.5 86 9.5 7.2 132
TOWER 10500 11.4 17.3 66 12.7 12.8 99
WEBBER SPRINGS 9200 4.8 9.3 52 9.3 10.5 89
WILLOW CREEK PASS 9540 4.1 4.3 95 5.1 4.8 106
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Basin wide percent of average 70 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.5 9.4 48 6.9 6.7 103
CASPER MTN. 7900 3.0 6.2 48 9.0 6.0 150
DEADMAN HILL 10220 5.9 6.1 97 6.7 6.1 110
DEER PARK 9700 4.9 -M * 7.1 -M *
LAPRELE CREEK 8320 .6 3.6 17 6.7 4.1 163
RENO HILL 8400 4.6 4.9 94 9.2 7.9 116
ROACH 9700 3.7 6.0 62 6.8 7.9 86
SAND LAKE 10080 9.9 11.7 85 11.7 7.4 158
SOUTH PASS 9040 4.7 6.7 70 6.5 6.4 102
WINDY PEAK 7840 1.1 2.7 41 7.2 3.3 218
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Basin wide percent of average 66 127
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.7 3.6 47 7.5 5.8 129
DIVIDE PEAK 8800 5.5 7.5 73 11.8 8.9 133
OLD BATTLE 10000 8.5 11.6 73 12.7 11.1 114
SANDSTONE RS 8150 2.3 4.5 51 8.3 6.8 122
WHISKEY PARK 8950 5.2 9.6 54 10.3 8.5 121
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Basin wide percent of average 63 123
UPPER GREEN RIVER
BIG SANDY OPENING 9100 4.4 4.3 102 4.2 6.2 68
BLIND BULL SUM 8650 6.2 9.9 63 6.7 8.2 82
EAST RIM DIVIDE 7930 2.6 3.9 67 3.5 5.7 61
ELKHART PARK G.S. 9400 3.5 4.3 81 4.3 6.1 70
GROS VENTRE SUMMIT 8775 4.7 5.1 92 5.4 6.1 89
KENDALL R.S. 7740 3.0 4.0 75 3.7 5.9 63
LOOMIS PARK 8240 3.2 5.0 64 4.6 7.2 64
NEW FORK LAKE 8340 2.5 3.2 78 3.2 5.5 58
SNIDER BASIN 8250 2.2 4.2 52 3.5 5.7 61
SPRING CREEK DIVIDE 9000 5.6 8.6 65 6.8 9.9 69
TRIPLE PEAK 8500 5.2 7.8 67 7.0 11.8 59
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Basin wide percent of average 71 68
LOWER GREEN RIVER
HAMS FORK 7840 1.4 2.9 48 3.1 5.1 61
HEWINTA 9500 2.2 3.0 73 4.8 5.2 92
HICKERSON PARK 9150 2.0 2.1 95 4.9 4.1 120
HOLE-IN-ROCK 9150 2.0 1.9 105 5.3 4.1 129
INDIAN CREEK 9425 5.6 8.5 66 6.0 9.5 63
KELLEY R.S. 8180 2.7 4.9 55 4.5 7.1 63
STEEL CREEK PARK 10100 3.5 5.8 60 6.3 5.5 115
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Basin wide percent of average 67 86
UPPER BEAR RIVER
BUG LAKE 7950 2.9 6.8 43 5.1 7.8 65
HAYDEN FORK 9400 3.4 5.0 68 6.4 6.9 93
KELLEY R.S. 8180 2.7 4.9 55 4.5 7.1 63
LILY LAKE 9050 3.6 4.5 80 6.8 5.9 115
MONTE CRISTO 8960 5.4 8.6 63 8.4 9.7 87
SALT RIVER SUMMIT 7600 2.1 3.3 64 4.8 6.4 75
TRIAL LAKE 9960 4.0 7.9 51 5.6 8.8 64
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Basin wide percent of average 59 79
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-M = Missing data
* = Data may not provide a valid measure of conditions.
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.