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 15 , 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 5.7 84 6.9 8.6 80
COTTONWOOD CREEK 7600 4.2 6.4 66 7.5 9.2 82
GRANITE CREEK 6770 3.3 5.3 62 5.2 9.1 57
GRASSY LAKE 7265 9.3 10.2 91 11.4 14.0 81
GROS VENTRE SUMMIT 8775 4.7 5.2 90 5.5 6.2 89
LEWIS LAKE DIVIDE 7860 9.3 10.0 93 11.9 14.2 84
PHILLIPS BENCH 8200 7.0 8.2 85 7.8 11.0 71
SALT RIVER SUMMIT 7600 2.1 3.4 62 4.8 6.5 74
SNAKE RIVER STATION 6920 4.7 5.6 84 7.1 9.8 72
SPRING CREEK DIVIDE 9000 5.6 8.8 64 6.8 10.1 67
THUMB DIVIDE 7980 7.7 5.3 145 8.2 8.0 102
TOGWOTEE PASS 9580 8.0 8.6 93 8.5 10.6 80
TWO OCEAN PLATEAU 9360 11.7 10.2 115 10.9 11.9 92
WILLOW CREEK 8450 6.7 9.5 71 12.1 12.0 101
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Basin wide percent of average 87 81
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 7.6 9.1 84 7.0 6.6 106
BLACK BEAR 7950 15.0 11.7 128 15.1 13.2 114
CANYON 7940 4.9 4.0 123 5.9 5.5 107
FISHER CREEK 9100 12.9 11.9 108 12.1 12.3 98
MADISON PLATEAU 7750 -M 7.6 * 11.2 9.1 123
NORTHEAST ENTRANCE 7350 2.6 2.9 90 4.5 4.6 98
PARKER PEAK 9400 7.3 9.0 81 -M 6.2 *
SYLVAN LAKE 8420 9.0 8.8 102 11.2 8.0 140
THUMB DIVIDE 7980 7.7 5.3 145 8.2 8.0 102
TWO OCEAN PLATEAU 9360 11.7 10.2 115 10.9 11.9 92
WHISKEY CREEK 6800 6.8 5.2 131 8.9 7.5 119
WHITE MILL 8700 7.7 8.5 91 7.8 9.9 79
WOLVERINE 7650 3.9 3.7 105 4.5 5.1 88
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Basin wide percent of average 108 106
WIND RIVER
BURROUGHS CREEK 8750 4.0 5.4 74 4.6 6.5 71
COLD SPRINGS 9630 4.1 3.6 114 5.6 4.7 119
DEER PARK 9700 4.9 -M * 7.1 -M *
HOBBS PARK 10100 7.2 6.3 114 7.4 5.5 135
LITTLE WARM 9620 4.4 4.2 105 5.4 5.4 100
SOUTH PASS 9040 4.7 6.8 69 6.5 6.5 100
ST. LAWRENCE ALT 8620 3.4 2.6 131 6.0 4.3 140
TOGWOTEE PASS 9580 8.0 8.6 93 8.5 10.6 80
TOWNSEND CREEK 8700 3.7 3.6 103 6.5 4.8 135
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Basin wide percent of average 96 105
BIGHORN BASIN
BALD MTN. 9375 5.5 8.0 69 5.7 6.7 85
BEAR TRAP MEADOW 7900 2.4 2.8 86 5.5 3.6 153
BLACKWATER 9780 11.2 7.7 145 10.2 7.0 146
BONE SPRINGS DIV 9350 4.4 6.4 69 5.0 5.5 91
EVENING STAR 9200 10.3 10.8 95 10.8 8.6 126
GRAVE SPRINGS 8550 2.4 3.7 65 5.6 4.3 130
KIRWIN 9550 4.7 4.3 109 5.3 4.4 120
MARQUETTE 8760 4.7 3.2 147 5.7 4.0 143
MIDDLE POWDER 7760 2.3 4.7 49 8.4 5.0 168
OWL CREEK 8975 2.8 1.4 200 3.7 2.4 154
POWDER RIVER PASS 9480 2.5 4.2 60 4.5 4.6 98
SHELL CREEK 9580 4.9 6.1 80 4.5 5.1 88
SYLVAN LAKE 8420 9.0 8.8 102 11.2 8.0 140
SYLVAN ROAD 8120 5.1 4.6 111 6.7 6.5 103
TIMBER CREEK 7950 2.8 1.8 156 4.4 2.9 152
YOUNTS PEAK 8350 5.9 7.1 83 5.5 6.4 86
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Basin wide percent of average 95 121
SHOSHONE RIVER
BLACKWATER 9780 11.2 7.7 145 10.2 7.0 146
EVENING STAR 9200 10.3 10.8 95 10.8 8.6 126
KIRWIN 9550 4.7 4.3 109 5.3 4.4 120
MARQUETTE 8760 4.7 3.2 147 5.7 4.0 143
SYLVAN LAKE 8420 9.0 8.8 102 11.2 8.0 140
SYLVAN ROAD 8120 5.1 4.6 111 6.7 6.5 103
YOUNTS PEAK 8350 5.9 7.1 83 5.5 6.4 86
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Basin wide percent of average 109 123
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.4 2.8 86 5.5 3.6 153
BIG GOOSE 7990 2.1 -M * 5.3 -M *
BONE SPRINGS DIV 9350 4.4 6.4 69 5.0 5.5 91
BURGESS JUNCTION 7880 2.3 4.5 51 4.6 4.6 100
CLOUD PEAK RESERVOIR 9860 4.3 4.5 96 5.8 5.1 114
DOME LAKE 8880 2.5 5.1 49 4.2 5.7 74
GRAVE SPRINGS 8550 2.4 3.7 65 5.6 4.3 130
HANSEN SAWMILL 8760 2.1 2.7 78 3.7 3.4 109
MIDDLE POWDER 7760 2.3 4.7 49 8.4 5.0 168
POWDER RIVER PASS 9480 2.5 4.2 60 4.5 4.6 98
SUCKER CREEK 8880 3.5 3.9 90 5.4 5.2 104
TIE CREEK 6870 .7 -M * 3.7 4.4 84
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Basin wide percent of average 68 110
BELLE FOURCHE
BLIND PARK 6890 1.2 4.3 28 7.7 3.9 197
NORTH RAPID CREEK 6130 1.4 -M * 8.1 -M *
WARREN PEAK 6520 1.7 4.3 40 7.6 3.2 238
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Basin wide percent of average 34 215
UPPER N. PLATTE RIVER
COLUMBINE 9400 3.3 7.1 46 6.4 8.3 77
DIVIDE PEAK 8800 5.5 7.6 72 11.7 9.0 130
ELK RIVER 8700 2.2 5.8 38 8.4 6.8 124
JOE WRIGHT 10120 6.5 8.5 76 9.5 9.5 100
NORTH FRENCH CREEK 10100 8.9 9.0 99 11.5 8.3 139
OLD BATTLE 10000 8.5 11.8 72 12.6 11.2 113
SOUTH BRUSH CREEK 8400 3.1 3.6 86 9.5 7.3 130
TOWER 10500 11.2 17.6 64 12.6 13.0 97
WEBBER SPRINGS 9200 4.8 9.5 51 9.3 10.6 88
WILLOW CREEK PASS 9540 4.2 4.4 95 5.2 4.9 106
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Basin wide percent of average 69 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.4 9.6 46 6.8 6.8 100
CASPER MTN. 7900 3.0 6.3 48 9.0 6.1 148
DEADMAN HILL 10220 5.9 6.2 95 6.7 6.1 110
DEER PARK 9700 4.9 -M * 7.1 -M *
LAPRELE CREEK 8320 .6 3.7 16 6.7 4.1 163
RENO HILL 8400 4.6 5.0 92 9.2 8.0 115
ROACH 9700 3.7 6.1 61 6.8 8.0 85
SAND LAKE 10080 9.8 11.9 82 11.7 7.5 156
SOUTH PASS 9040 4.7 6.8 69 6.5 6.5 100
WINDY PEAK 7840 .9 2.7 33 7.0 3.3 212
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Basin wide percent of average 64 125
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.5 3.7 41 7.5 5.9 127
DIVIDE PEAK 8800 5.5 7.6 72 11.7 9.0 130
OLD BATTLE 10000 8.5 11.8 72 12.6 11.2 113
SANDSTONE RS 8150 2.4 4.6 52 8.3 6.9 120
WHISKEY PARK 8950 5.2 9.8 53 10.3 8.7 118
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Basin wide percent of average 62 121
UPPER GREEN RIVER
BIG SANDY OPENING 9100 4.4 4.4 100 4.3 6.3 68
BLIND BULL SUM 8650 6.2 10.1 61 6.7 8.4 80
EAST RIM DIVIDE 7930 2.6 4.1 63 3.5 5.8 60
ELKHART PARK G.S. 9400 3.4 4.4 77 4.3 6.2 69
GROS VENTRE SUMMIT 8775 4.7 5.2 90 5.5 6.2 89
KENDALL R.S. 7740 3.0 4.1 73 3.7 6.0 62
LOOMIS PARK 8240 3.2 5.1 63 4.6 7.3 63
NEW FORK LAKE 8340 2.5 3.3 76 3.1 5.6 55
SNIDER BASIN 8250 2.2 4.3 51 3.5 5.8 60
SPRING CREEK DIVIDE 9000 5.6 8.8 64 6.8 10.1 67
TRIPLE PEAK 8500 5.3 8.0 66 7.1 12.0 59
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Basin wide percent of average 70 67
LOWER GREEN RIVER
HAMS FORK 7840 1.4 3.0 47 3.1 5.2 60
HEWINTA 9500 2.2 3.0 73 5.0 5.3 94
HICKERSON PARK 9150 2.0 2.1 95 4.7 4.1 115
HOLE-IN-ROCK 9150 1.9 1.9 100 5.1 4.1 124
INDIAN CREEK 9425 5.6 8.7 64 5.9 9.7 61
KELLEY R.S. 8180 2.7 5.0 54 4.5 7.3 62
STEEL CREEK PARK 10100 3.3 5.9 56 6.2 5.6 111
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Basin wide percent of average 65 84
UPPER BEAR RIVER
BUG LAKE 7950 2.8 6.9 41 5.1 7.9 65
HAYDEN FORK 9400 3.3 5.1 65 6.0 7.0 86
KELLEY R.S. 8180 2.7 5.0 54 4.5 7.3 62
LILY LAKE 9050 3.7 4.6 80 6.8 6.0 113
MONTE CRISTO 8960 5.4 8.8 61 8.4 9.9 85
SALT RIVER SUMMIT 7600 2.1 3.4 62 4.8 6.5 74
TRIAL LAKE 9960 4.0 8.0 50 5.6 8.9 63
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Basin wide percent of average 57 77
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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.