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 FRIDAY: DECEMBER 11 , 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 4.7 5.2 90 6.8 8.0 85
COTTONWOOD CREEK 7600 4.1 5.8 71 7.5 8.5 88
GRANITE CREEK 6770 3.1 4.8 65 5.1 8.4 61
GRASSY LAKE 7265 9.3 9.3 100 11.2 13.0 86
GROS VENTRE SUMMIT 8775 4.6 4.7 98 5.4 5.8 93
LEWIS LAKE DIVIDE 7860 9.3 9.1 102 11.7 13.1 89
PHILLIPS BENCH 8200 6.8 7.5 91 7.7 10.2 75
SALT RIVER SUMMIT 7600 2.1 3.1 68 4.6 6.1 75
SNAKE RIVER STATION 6920 4.7 5.1 92 7.1 9.1 78
SPRING CREEK DIVIDE 9000 5.5 8.0 69 6.7 9.4 71
THUMB DIVIDE 7980 7.7 4.8 160 8.1 7.5 108
TOGWOTEE PASS 9580 8.0 7.9 101 8.4 9.8 86
TWO OCEAN PLATEAU 9360 11.7 9.5 123 10.8 11.0 98
WILLOW CREEK 8450 6.6 8.5 78 12.0 11.1 108
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Basin wide percent of average 95 86
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 7.4 8.5 87 6.8 6.2 110
BLACK BEAR 7950 14.9 10.7 139 14.8 12.3 120
CANYON 7940 4.8 3.6 133 5.8 5.1 114
FISHER CREEK 9100 12.8 11.0 116 11.8 11.4 104
MADISON PLATEAU 7750 -M 6.9 * 11.3 8.4 135
NORTHEAST ENTRANCE 7350 2.6 2.6 100 4.3 4.4 98
PARKER PEAK 9400 7.1 8.4 85 -M 5.8 *
SYLVAN LAKE 8420 8.9 8.2 109 11.1 7.6 146
THUMB DIVIDE 7980 7.7 4.8 160 8.1 7.5 108
TWO OCEAN PLATEAU 9360 11.7 9.5 123 10.8 11.0 98
WHISKEY CREEK 6800 6.9 4.8 144 8.8 6.9 128
WHITE MILL 8700 7.6 7.8 97 7.6 9.2 83
WOLVERINE 7650 3.9 3.3 118 4.5 4.8 94
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Basin wide percent of average 116 111
WIND RIVER
BURROUGHS CREEK 8750 3.8 4.9 78 4.5 6.1 74
COLD SPRINGS 9630 4.1 3.3 124 5.6 4.5 124
DEER PARK 9700 4.9 -M * 7.1 -M *
HOBBS PARK 10100 6.9 5.9 117 7.5 5.2 144
LITTLE WARM 9620 4.3 3.9 110 5.5 5.2 106
SOUTH PASS 9040 4.6 6.4 72 6.4 6.2 103
ST. LAWRENCE ALT 8620 3.4 2.4 142 6.0 4.2 143
TOGWOTEE PASS 9580 8.0 7.9 101 8.4 9.8 86
TOWNSEND CREEK 8700 3.7 3.3 112 6.4 4.5 142
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Basin wide percent of average 102 110
BIGHORN BASIN
BALD MTN. 9375 5.5 7.4 74 5.7 6.3 90
BEAR TRAP MEADOW 7900 2.3 2.6 88 5.6 3.5 160
BLACKWATER 9780 11.2 7.2 156 10.1 6.6 153
BONE SPRINGS DIV 9350 4.3 6.0 72 4.9 5.2 94
EVENING STAR 9200 10.3 10.1 102 10.7 8.1 132
GRAVE SPRINGS 8550 2.4 3.4 71 5.6 4.1 137
KIRWIN 9550 4.6 4.0 115 5.3 4.2 126
MARQUETTE 8760 4.8 3.0 160 5.8 3.9 149
MIDDLE POWDER 7760 2.3 4.4 52 8.4 4.7 179
OWL CREEK 8975 2.9 1.3 223 -M 2.3 *
POWDER RIVER PASS 9480 2.5 3.9 64 4.6 4.4 105
SHELL CREEK 9580 4.8 5.7 84 4.5 4.8 94
SYLVAN LAKE 8420 8.9 8.2 109 11.1 7.6 146
SYLVAN ROAD 8120 5.1 4.3 119 6.7 6.1 110
TIMBER CREEK 7950 2.8 1.6 175 4.5 2.8 161
YOUNTS PEAK 8350 6.0 6.6 91 5.5 6.0 92
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Basin wide percent of average 101 126
SHOSHONE RIVER
BLACKWATER 9780 11.2 7.2 156 10.1 6.6 153
EVENING STAR 9200 10.3 10.1 102 10.7 8.1 132
KIRWIN 9550 4.6 4.0 115 5.3 4.2 126
MARQUETTE 8760 4.8 3.0 160 5.8 3.9 149
SYLVAN LAKE 8420 8.9 8.2 109 11.1 7.6 146
SYLVAN ROAD 8120 5.1 4.3 119 6.7 6.1 110
YOUNTS PEAK 8350 6.0 6.6 91 5.5 6.0 92
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Basin wide percent of average 117 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.3 2.6 88 5.6 3.5 160
BIG GOOSE 7990 2.1 -M * 5.3 -M *
BONE SPRINGS DIV 9350 4.3 6.0 72 4.9 5.2 94
BURGESS JUNCTION 7880 2.3 4.2 55 4.6 4.4 105
CLOUD PEAK RESERVOIR 9860 4.3 4.2 102 -M 4.9 *
DOME LAKE 8880 2.6 4.8 54 4.2 5.4 78
GRAVE SPRINGS 8550 2.4 3.4 71 5.6 4.1 137
HANSEN SAWMILL 8760 2.1 2.5 84 3.7 3.3 112
MIDDLE POWDER 7760 2.3 4.4 52 8.4 4.7 179
POWDER RIVER PASS 9480 2.5 3.9 64 4.6 4.4 105
SUCKER CREEK 8880 3.6 3.6 100 5.5 4.9 112
TIE CREEK 6870 .7 -M * 3.7 4.2 88
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Basin wide percent of average 72 115
BELLE FOURCHE
BLIND PARK 6890 1.2 4.0 30 7.6 3.7 205
NORTH RAPID CREEK 6130 1.3 -M * 8.1 -M *
WARREN PEAK 6520 1.5 4.0 38 7.6 3.1 245
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Basin wide percent of average 34 224
UPPER N. PLATTE RIVER
COLUMBINE 9400 3.2 6.5 49 5.9 7.7 77
DIVIDE PEAK 8800 5.4 7.1 76 11.5 8.4 137
ELK RIVER 8700 1.6 5.2 31 8.0 6.3 127
JOE WRIGHT 10120 6.2 8.0 78 9.4 9.0 104
NORTH FRENCH CREEK 10100 8.7 8.3 105 11.5 7.6 151
OLD BATTLE 10000 8.5 10.9 78 12.4 10.5 118
SOUTH BRUSH CREEK 8400 2.9 3.3 88 9.4 6.7 140
TOWER 10500 11.9 16.5 72 12.5 12.1 103
WEBBER SPRINGS 9200 4.6 8.8 52 9.1 10.0 91
WILLOW CREEK PASS 9540 3.7 4.1 90 4.7 4.6 102
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Basin wide percent of average 72 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.6 8.9 52 6.8 6.4 106
CASPER MTN. 7900 2.8 5.8 48 8.7 5.8 150
DEADMAN HILL 10220 5.9 5.7 104 6.6 5.8 114
DEER PARK 9700 4.9 -M * 7.1 -M *
LAPRELE CREEK 8320 .5 3.4 15 6.5 3.9 167
RENO HILL 8400 4.5 4.7 96 8.9 7.6 117
ROACH 9700 3.6 5.6 64 6.7 7.5 89
SAND LAKE 10080 10.1 11.0 92 11.6 7.1 163
SOUTH PASS 9040 4.6 6.4 72 6.4 6.2 103
WINDY PEAK 7840 .6 2.5 24 6.6 3.2 206
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Basin wide percent of average 69 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.9 3.4 85 7.5 5.5 136
DIVIDE PEAK 8800 5.4 7.1 76 11.5 8.4 137
OLD BATTLE 10000 8.5 10.9 78 12.4 10.5 118
SANDSTONE RS 8150 2.0 4.2 48 8.2 6.4 128
WHISKEY PARK 8950 4.5 9.0 50 10.0 8.0 125
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Basin wide percent of average 67 128
UPPER GREEN RIVER
BIG SANDY OPENING 9100 4.2 4.0 105 4.2 5.8 72
BLIND BULL SUM 8650 6.1 9.3 66 6.6 7.8 85
EAST RIM DIVIDE 7930 2.4 3.3 73 3.4 5.4 63
ELKHART PARK G.S. 9400 3.4 4.0 85 4.3 5.8 74
GROS VENTRE SUMMIT 8775 4.6 4.7 98 5.4 5.8 93
KENDALL R.S. 7740 2.9 3.6 81 3.6 5.6 64
LOOMIS PARK 8240 3.2 4.6 70 4.5 6.8 66
NEW FORK LAKE 8340 2.4 3.0 80 3.0 5.2 58
SNIDER BASIN 8250 2.2 3.9 56 3.5 5.4 65
SPRING CREEK DIVIDE 9000 5.5 8.0 69 6.7 9.4 71
TRIPLE PEAK 8500 5.3 7.3 73 7.1 11.1 64
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Basin wide percent of average 76 71
LOWER GREEN RIVER
HAMS FORK 7840 1.4 2.6 54 3.1 4.8 65
HEWINTA 9500 1.9 2.8 68 5.0 5.0 100
HICKERSON PARK 9150 1.9 2.0 95 4.7 4.0 118
HOLE-IN-ROCK 9150 1.9 1.8 106 5.2 4.0 130
INDIAN CREEK 9425 5.6 8.0 70 5.8 9.0 64
KELLEY R.S. 8180 2.6 4.5 58 4.3 6.8 63
STEEL CREEK PARK 10100 3.2 5.6 57 6.1 5.3 115
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Basin wide percent of average 68 88
UPPER BEAR RIVER
BUG LAKE 7950 3.0 6.4 47 5.0 7.5 67
HAYDEN FORK 9400 3.4 4.7 72 6.5 6.6 98
KELLEY R.S. 8180 2.6 4.5 58 4.3 6.8 63
LILY LAKE 9050 3.5 4.3 81 6.9 5.7 121
MONTE CRISTO 8960 5.4 8.1 67 8.4 9.3 90
SALT RIVER SUMMIT 7600 2.1 3.1 68 4.6 6.1 75
TRIAL LAKE 9960 4.0 7.4 54 5.7 8.4 68
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Basin wide percent of average 62 82
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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.