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: DECEMBER 31 , 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 8.7 7.8 112 10.8 11.0 98
COTTONWOOD CREEK 7600 8.6 8.7 99 11.7 11.7 100
GRANITE CREEK 6770 6.9 7.1 97 8.9 11.6 77
GRASSY LAKE 7265 15.0 14.1 106 16.5 18.0 92
GROS VENTRE SUMMIT 8775 6.2 6.8 91 6.7 7.9 85
LEWIS LAKE DIVIDE 7860 14.3 13.6 105 16.9 18.2 93
PHILLIPS BENCH 8200 11.8 11.3 104 12.4 14.1 88
SALT RIVER SUMMIT 7600 4.9 5.0 98 7.3 8.4 87
SNAKE RIVER STATION 6920 7.8 7.5 104 10.3 12.6 82
SPRING CREEK DIVIDE 9000 10.5 11.4 92 11.4 13.1 87
THUMB DIVIDE 7980 10.0 7.1 141 10.2 10.4 98
TOGWOTEE PASS 9580 12.8 11.0 116 13.1 13.6 96
TWO OCEAN PLATEAU 9360 16.0 12.5 128 14.6 15.3 95
WILLOW CREEK 8450 11.7 12.6 93 17.1 15.4 111
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Basin wide percent of average 106 93
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 11.5 11.4 101 10.5 8.4 125
BLACK BEAR 7950 19.8 15.4 129 19.3 17.0 114
CANYON 7940 7.3 5.2 140 8.4 6.8 124
FISHER CREEK 9100 17.8 15.4 116 16.0 15.8 101
MADISON PLATEAU 7750 -M 10.0 * 13.2 11.5 115
NORTHEAST ENTRANCE 7350 4.8 3.9 123 6.4 5.7 112
PARKER PEAK 9400 10.8 10.5 103 -M 7.5 *
SYLVAN LAKE 8420 11.5 10.7 107 13.8 9.7 142
THUMB DIVIDE 7980 10.0 7.1 141 10.2 10.4 98
TWO OCEAN PLATEAU 9360 16.0 12.5 128 14.6 15.3 95
WHISKEY CREEK 6800 8.2 6.9 119 10.6 9.6 110
WHITE MILL 8700 11.1 11.2 99 10.5 12.6 83
WOLVERINE 7650 8.0 5.1 157 6.3 6.3 100
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Basin wide percent of average 119 108
WIND RIVER
BURROUGHS CREEK 8750 7.9 7.0 113 8.7 8.0 109
COLD SPRINGS 9630 5.0 4.4 114 6.6 5.5 120
DEER PARK 9700 6.1 -M * 9.2 -M *
HOBBS PARK 10100 8.2 7.6 108 8.6 6.8 126
LITTLE WARM 9620 6.2 5.0 124 7.2 6.5 111
SOUTH PASS 9040 7.0 8.2 85 8.6 7.9 109
ST. LAWRENCE ALT 8620 3.8 3.3 115 6.6 5.0 132
TOGWOTEE PASS 9580 12.8 11.0 116 13.1 13.6 96
TOWNSEND CREEK 8700 4.3 4.4 98 6.9 5.7 121
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Basin wide percent of average 108 112
BIGHORN BASIN
BALD MTN. 9375 8.1 10.1 80 7.8 8.6 91
BEAR TRAP MEADOW 7900 3.0 3.6 83 6.1 4.3 142
BLACKWATER 9780 14.9 9.8 152 13.1 8.7 151
BONE SPRINGS DIV 9350 6.7 7.7 87 7.1 6.8 104
EVENING STAR 9200 15.9 12.8 124 16.4 10.7 153
GRAVE SPRINGS 8550 3.0 4.5 67 6.3 5.1 124
KIRWIN 9550 6.6 5.1 129 7.7 5.2 148
MARQUETTE 8760 -M 3.8 * 6.0 4.7 128
MIDDLE POWDER 7760 3.2 5.6 57 9.8 5.9 166
OWL CREEK 8975 3.4 1.9 179 4.4 2.8 157
POWDER RIVER PASS 9480 4.7 5.0 94 6.7 5.5 122
SHELL CREEK 9580 7.3 7.4 99 6.4 6.3 102
SYLVAN LAKE 8420 11.5 10.7 107 13.8 9.7 142
SYLVAN ROAD 8120 7.6 5.7 133 9.3 7.9 118
TIMBER CREEK 7950 3.2 2.4 133 5.3 3.3 161
YOUNTS PEAK 8350 10.0 8.8 114 8.9 7.9 113
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Basin wide percent of average 108 131
SHOSHONE RIVER
BLACKWATER 9780 14.9 9.8 152 13.1 8.7 151
EVENING STAR 9200 15.9 12.8 124 16.4 10.7 153
KIRWIN 9550 6.6 5.1 129 7.7 5.2 148
MARQUETTE 8760 -M 3.8 * 6.0 4.7 128
SYLVAN LAKE 8420 11.5 10.7 107 13.8 9.7 142
SYLVAN ROAD 8120 7.6 5.7 133 9.3 7.9 118
YOUNTS PEAK 8350 10.0 8.8 114 8.9 7.9 113
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Basin wide percent of average 126 137
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.0 3.6 83 6.1 4.3 142
BIG GOOSE 7990 2.9 -M * 6.1 -M *
BONE SPRINGS DIV 9350 6.7 7.7 87 7.1 6.8 104
BURGESS JUNCTION 7880 3.3 5.4 61 5.6 5.5 102
CLOUD PEAK RESERVOIR 9860 6.7 5.5 122 6.9 6.0 115
DOME LAKE 8880 3.9 6.2 63 5.7 6.8 84
GRAVE SPRINGS 8550 3.0 4.5 67 6.3 5.1 124
HANSEN SAWMILL 8760 2.9 3.3 88 5.1 3.9 131
MIDDLE POWDER 7760 3.2 5.6 57 9.8 5.9 166
POWDER RIVER PASS 9480 4.7 5.0 94 6.7 5.5 122
SUCKER CREEK 8880 4.3 5.1 84 6.9 6.4 108
TIE CREEK 6870 .9 -M * 4.2 5.3 79
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Basin wide percent of average 80 114
BELLE FOURCHE
BLIND PARK 6890 2.0 5.2 38 8.9 4.7 189
NORTH RAPID CREEK 6130 2.0 -M * 8.7 -M *
WARREN PEAK 6520 2.2 5.2 42 8.2 3.9 210
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Basin wide percent of average 40 199
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.6 9.6 69 9.2 10.7 86
DIVIDE PEAK 8800 6.8 9.4 72 13.4 11.7 115
ELK RIVER 8700 3.6 8.0 45 10.3 8.7 118
JOE WRIGHT 10120 7.1 10.3 69 11.5 11.5 100
NORTH FRENCH CREEK 10100 11.3 11.3 100 13.7 10.7 128
OLD BATTLE 10000 10.4 14.6 71 15.5 14.0 111
SOUTH BRUSH CREEK 8400 3.7 4.7 79 10.6 9.7 109
TOWER 10500 14.6 21.6 68 16.4 16.5 99
WEBBER SPRINGS 9200 6.7 12.0 56 11.4 13.0 88
WILLOW CREEK PASS 9540 4.5 5.6 80 6.3 6.0 105
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Basin wide percent of average 70 105
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 6.9 11.9 58 9.4 8.5 111
CASPER MTN. 7900 3.5 7.4 47 9.4 7.0 134
DEADMAN HILL 10220 8.2 7.8 105 9.0 7.3 123
DEER PARK 9700 6.1 -M * 9.2 -M *
LAPRELE CREEK 8320 1.0 4.6 22 7.3 5.0 146
RENO HILL 8400 5.1 6.1 84 9.8 9.6 102
ROACH 9700 5.9 7.6 78 9.1 10.1 90
SAND LAKE 10080 12.3 14.9 83 13.9 9.3 149
SOUTH PASS 9040 7.0 8.2 85 8.6 7.9 109
WINDY PEAK 7840 1.6 3.3 48 7.9 4.1 193
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Basin wide percent of average 72 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.1 4.9 63 8.6 7.4 116
DIVIDE PEAK 8800 6.8 9.4 72 13.4 11.7 115
OLD BATTLE 10000 10.4 14.6 71 15.5 14.0 111
SANDSTONE RS 8150 -M 6.1 * -M 8.9 *
WHISKEY PARK 8950 7.1 12.6 56 13.0 11.6 112
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Basin wide percent of average 66 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.1 5.9 120 6.6 8.1 81
BLIND BULL SUM 8650 11.4 12.4 92 9.8 10.8 91
EAST RIM DIVIDE 7930 5.3 5.6 95 6.1 7.5 81
ELKHART PARK G.S. 9400 5.6 5.7 98 6.4 7.9 81
GROS VENTRE SUMMIT 8775 6.2 6.8 91 6.7 7.9 85
KENDALL R.S. 7740 6.0 5.8 103 6.7 7.7 87
LOOMIS PARK 8240 6.9 6.9 100 8.2 9.4 87
NEW FORK LAKE 8340 5.0 4.5 111 5.5 7.2 76
SNIDER BASIN 8250 5.7 5.9 97 6.5 7.5 87
SPRING CREEK DIVIDE 9000 10.5 11.4 92 11.4 13.1 87
TRIPLE PEAK 8500 10.7 10.7 100 12.2 15.4 79
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Basin wide percent of average 99 84
LOWER GREEN RIVER
HAMS FORK 7840 3.8 4.2 90 4.6 6.6 70
HEWINTA 9500 3.0 3.8 79 5.8 6.3 92
HICKERSON PARK 9150 2.1 2.6 81 4.8 4.8 100
HOLE-IN-ROCK 9150 2.8 2.3 122 5.3 4.8 110
INDIAN CREEK 9425 9.8 11.4 86 8.8 12.4 71
KELLEY R.S. 8180 5.7 6.6 86 7.4 9.3 80
STEEL CREEK PARK 10100 4.7 7.1 66 7.1 6.7 106
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Basin wide percent of average 84 86
UPPER BEAR RIVER
BUG LAKE 7950 5.1 8.7 59 6.5 9.4 69
HAYDEN FORK 9400 4.6 6.7 69 7.9 8.7 91
KELLEY R.S. 8180 5.7 6.6 86 7.4 9.3 80
LILY LAKE 9050 4.5 6.1 74 7.5 7.1 106
MONTE CRISTO 8960 6.8 10.9 62 10.2 12.2 84
SALT RIVER SUMMIT 7600 4.9 5.0 98 7.3 8.4 87
TRIAL LAKE 9960 4.8 10.6 45 6.2 10.9 57
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Basin wide percent of average 67 80
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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.