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: JANUARY 1 , 1999
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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 8.8 7.9 111 10.8 11.2 96
COTTONWOOD CREEK 7600 8.9 8.8 101 11.9 11.9 100
GRANITE CREEK 6770 7.0 7.2 97 9.0 11.8 76
GRASSY LAKE 7265 15.6 14.3 109 17.1 18.2 94
GROS VENTRE SUMMIT 8775 6.3 6.9 91 6.7 8.0 84
LEWIS LAKE DIVIDE 7860 14.5 13.8 105 17.1 18.5 92
PHILLIPS BENCH 8200 12.0 11.5 104 12.6 14.3 88
SALT RIVER SUMMIT 7600 5.0 5.1 98 7.4 8.5 87
SNAKE RIVER STATION 6920 7.9 7.6 104 10.5 12.8 82
SPRING CREEK DIVIDE 9000 10.7 11.6 92 11.5 13.3 86
THUMB DIVIDE 7980 10.1 7.2 140 10.3 10.5 98
TOGWOTEE PASS 9580 11.4 11.1 103 13.3 13.8 96
TWO OCEAN PLATEAU 9360 16.2 12.6 129 14.8 15.5 95
WILLOW CREEK 8450 12.1 12.8 95 17.3 15.6 111
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Basin wide percent of average 106 93
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 11.7 11.5 102 10.7 8.5 126
BLACK BEAR 7950 20.1 15.6 129 19.5 17.2 113
CANYON 7940 7.6 5.3 143 8.7 6.9 126
FISHER CREEK 9100 18.0 15.6 115 16.3 16.0 102
MADISON PLATEAU 7750 -M 10.1 * 13.3 11.7 114
NORTHEAST ENTRANCE 7350 5.0 4.0 125 6.7 5.8 116
PARKER PEAK 9400 11.1 10.6 105 -M 7.6 *
SYLVAN LAKE 8420 11.7 10.8 108 14.0 9.8 143
THUMB DIVIDE 7980 10.1 7.2 140 10.3 10.5 98
TWO OCEAN PLATEAU 9360 16.2 12.6 129 14.8 15.5 95
WHISKEY CREEK 6800 8.4 7.0 120 10.7 9.7 110
WHITE MILL 8700 11.3 11.4 99 10.7 12.8 84
WOLVERINE 7650 8.2 5.2 158 6.5 6.4 102
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Basin wide percent of average 119 109
WIND RIVER
BURROUGHS CREEK 8750 8.0 7.1 113 8.8 8.1 109
COLD SPRINGS 9630 5.1 4.4 116 6.6 5.5 120
DEER PARK 9700 6.2 -M * 9.2 -M *
HOBBS PARK 10100 8.2 7.7 106 8.6 6.9 125
LITTLE WARM 9620 6.3 5.1 124 7.3 6.6 111
SOUTH PASS 9040 7.1 8.3 86 8.6 8.0 108
ST. LAWRENCE ALT 8620 3.9 3.3 118 6.6 5.0 132
TOGWOTEE PASS 9580 11.4 11.1 103 13.3 13.8 96
TOWNSEND CREEK 8700 4.4 4.5 98 7.0 5.8 121
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Basin wide percent of average 106 112
BIGHORN BASIN
BALD MTN. 9375 8.2 10.2 80 8.1 8.7 93
BEAR TRAP MEADOW 7900 3.0 3.7 81 6.2 4.3 144
BLACKWATER 9780 15.1 9.9 153 13.2 8.8 150
BONE SPRINGS DIV 9350 6.9 7.8 88 7.4 6.9 107
EVENING STAR 9200 16.0 12.9 124 16.6 10.8 154
GRAVE SPRINGS 8550 3.2 4.5 71 6.4 5.1 125
KIRWIN 9550 6.7 5.2 129 7.8 5.2 150
MARQUETTE 8760 5.1 3.8 134 6.3 4.7 134
MIDDLE POWDER 7760 3.3 5.7 58 9.8 6.0 163
OWL CREEK 8975 3.6 1.9 189 4.5 2.8 161
POWDER RIVER PASS 9480 4.8 5.1 94 6.8 5.6 121
SHELL CREEK 9580 7.5 7.5 100 6.5 6.4 102
SYLVAN LAKE 8420 11.7 10.8 108 14.0 9.8 143
SYLVAN ROAD 8120 7.7 5.8 133 9.4 8.0 118
TIMBER CREEK 7950 3.3 2.4 138 5.3 3.3 161
YOUNTS PEAK 8350 10.1 8.9 113 9.0 8.0 112
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Basin wide percent of average 110 132
SHOSHONE RIVER
BLACKWATER 9780 15.1 9.9 153 13.2 8.8 150
EVENING STAR 9200 16.0 12.9 124 16.6 10.8 154
KIRWIN 9550 6.7 5.2 129 7.8 5.2 150
MARQUETTE 8760 5.1 3.8 134 6.3 4.7 134
SYLVAN LAKE 8420 11.7 10.8 108 14.0 9.8 143
SYLVAN ROAD 8120 7.7 5.8 133 9.4 8.0 118
YOUNTS PEAK 8350 10.1 8.9 113 9.0 8.0 112
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Basin wide percent of average 126 138
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.0 3.7 81 6.2 4.3 144
BIG GOOSE 7990 3.0 -M * 6.3 -M *
BONE SPRINGS DIV 9350 6.9 7.8 88 7.4 6.9 107
BURGESS JUNCTION 7880 3.7 5.5 67 5.8 5.6 104
CLOUD PEAK RESERVOIR 9860 6.8 5.6 121 7.2 6.1 118
DOME LAKE 8880 4.0 6.3 63 5.8 6.9 84
GRAVE SPRINGS 8550 3.2 4.5 71 6.4 5.1 125
HANSEN SAWMILL 8760 3.1 3.3 94 5.1 3.9 131
MIDDLE POWDER 7760 3.3 5.7 58 9.8 6.0 163
POWDER RIVER PASS 9480 4.8 5.1 94 6.8 5.6 121
SUCKER CREEK 8880 4.6 5.2 88 7.3 6.5 112
TIE CREEK 6870 1.1 -M * 4.3 5.4 80
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Basin wide percent of average 82 116
BELLE FOURCHE
BLIND PARK 6890 2.1 5.3 40 9.0 4.8 188
NORTH RAPID CREEK 6130 2.1 -M * 8.8 -M *
WARREN PEAK 6520 2.3 5.3 43 8.3 3.9 213
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Basin wide percent of average 42 199
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.7 9.8 68 9.3 10.8 86
DIVIDE PEAK 8800 7.3 9.5 77 13.8 11.9 116
ELK RIVER 8700 3.6 8.1 44 10.4 8.8 118
JOE WRIGHT 10120 7.0 10.4 67 11.5 11.6 99
NORTH FRENCH CREEK 10100 11.6 11.4 102 14.0 10.9 128
OLD BATTLE 10000 10.9 14.8 74 16.0 14.2 113
SOUTH BRUSH CREEK 8400 3.8 4.8 79 10.7 9.9 108
TOWER 10500 14.8 21.8 68 16.6 16.7 99
WEBBER SPRINGS 9200 7.0 12.2 57 11.6 13.2 88
WILLOW CREEK PASS 9540 4.4 5.7 77 6.5 6.1 107
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Basin wide percent of average 71 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 7.0 12.0 58 9.6 8.6 112
CASPER MTN. 7900 3.7 7.5 49 9.5 7.1 134
DEADMAN HILL 10220 8.6 7.9 109 9.0 7.4 122
DEER PARK 9700 6.2 -M * 9.2 -M *
LAPRELE CREEK 8320 1.1 4.7 23 7.3 5.1 143
RENO HILL 8400 5.2 6.2 84 9.9 9.7 102
ROACH 9700 6.1 7.7 79 9.3 10.2 91
SAND LAKE 10080 12.6 15.1 83 14.0 9.4 149
SOUTH PASS 9040 7.1 8.3 86 8.6 8.0 108
WINDY PEAK 7840 1.7 3.3 52 8.0 4.1 195
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Basin wide percent of average 73 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.7 5.0 74 8.8 7.5 117
DIVIDE PEAK 8800 7.3 9.5 77 13.8 11.9 116
OLD BATTLE 10000 10.9 14.8 74 16.0 14.2 113
SANDSTONE RS 8150 -M 6.2 * -M 9.0 *
WHISKEY PARK 8950 7.1 12.8 55 13.3 11.8 113
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Basin wide percent of average 69 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.2 6.0 120 6.7 8.2 82
BLIND BULL SUM 8650 11.5 12.5 92 9.9 10.9 91
EAST RIM DIVIDE 7930 5.4 5.7 95 6.1 7.6 80
ELKHART PARK G.S. 9400 5.7 5.8 98 6.5 8.0 81
GROS VENTRE SUMMIT 8775 6.3 6.9 91 6.7 8.0 84
KENDALL R.S. 7740 6.0 5.9 102 6.8 7.8 87
LOOMIS PARK 8240 7.0 7.0 100 8.3 9.5 87
NEW FORK LAKE 8340 5.0 4.6 109 5.7 7.3 78
SNIDER BASIN 8250 5.7 6.0 95 6.6 7.6 87
SPRING CREEK DIVIDE 9000 10.7 11.6 92 11.5 13.3 86
TRIPLE PEAK 8500 10.9 10.9 100 12.3 15.6 79
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Basin wide percent of average 98 84
LOWER GREEN RIVER
HAMS FORK 7840 4.0 4.3 93 4.7 6.7 70
HEWINTA 9500 3.1 3.9 79 5.9 6.4 92
HICKERSON PARK 9150 2.3 2.6 88 5.2 4.8 108
HOLE-IN-ROCK 9150 2.9 2.3 126 5.5 4.8 115
INDIAN CREEK 9425 10.0 11.6 86 9.0 12.6 71
KELLEY R.S. 8180 5.9 6.7 88 7.6 9.4 81
STEEL CREEK PARK 10100 5.0 7.2 69 7.3 6.8 107
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Basin wide percent of average 86 88
UPPER BEAR RIVER
BUG LAKE 7950 5.3 8.8 60 6.8 9.5 72
HAYDEN FORK 9400 4.8 6.8 71 8.2 8.8 93
KELLEY R.S. 8180 5.9 6.7 88 7.6 9.4 81
LILY LAKE 9050 4.7 6.2 76 7.7 7.2 107
MONTE CRISTO 8960 7.3 11.0 66 10.5 12.3 85
SALT RIVER SUMMIT 7600 5.0 5.1 98 7.4 8.5 87
TRIAL LAKE 9960 5.0 10.8 46 6.4 11.0 58
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Basin wide percent of average 69 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.