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 SUNDAY: JANUARY 17 , 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 12.0 10.4 115 14.2 13.8 103
COTTONWOOD CREEK 7600 10.6 11.8 90 13.8 14.7 94
GRANITE CREEK 6770 8.9 10.1 88 10.8 14.6 74
GRASSY LAKE 7265 21.2 19.0 112 21.9 22.4 98
GROS VENTRE SUMMIT 8775 7.1 8.9 80 7.6 9.9 77
LEWIS LAKE DIVIDE 7860 19.7 18.7 105 21.4 22.8 94
PHILLIPS BENCH 8200 15.3 15.8 97 15.8 17.9 88
SALT RIVER SUMMIT 7600 6.0 7.2 83 8.3 10.5 79
SNAKE RIVER STATION 6920 11.4 10.3 111 14.2 15.8 90
SPRING CREEK DIVIDE 9000 12.9 15.1 85 13.3 16.4 81
THUMB DIVIDE 7980 11.9 9.5 125 12.0 13.0 92
TOGWOTEE PASS 9580 -M 14.3 * 16.9 17.1 99
TWO OCEAN PLATEAU 9360 20.1 15.7 128 17.9 19.1 94
WILLOW CREEK 8450 14.5 17.3 84 19.8 19.3 103
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Basin wide percent of average 101 91
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 16.5 14.0 118 14.8 10.4 142
BLACK BEAR 7950 25.8 20.4 126 22.8 22.0 104
CANYON 7940 10.0 7.0 143 11.0 8.4 131
FISHER CREEK 9100 24.4 20.3 120 21.7 20.4 106
MADISON PLATEAU 7750 -M 13.4 * 16.2 14.6 111
NORTHEAST ENTRANCE 7350 7.3 5.3 138 9.1 7.1 128
PARKER PEAK 9400 14.2 12.6 113 -M 9.1 *
SYLVAN LAKE 8420 15.7 13.0 121 18.1 11.6 156
THUMB DIVIDE 7980 11.9 9.5 125 12.0 13.0 92
TWO OCEAN PLATEAU 9360 20.1 15.7 128 17.9 19.1 94
WHISKEY CREEK 6800 10.9 9.3 117 13.4 12.1 111
WHITE MILL 8700 15.7 14.4 109 14.3 16.2 88
WOLVERINE 7650 10.0 6.7 149 8.2 7.6 108
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Basin wide percent of average 123 110
WIND RIVER
BURROUGHS CREEK 8750 9.7 8.9 109 10.6 9.8 108
COLD SPRINGS 9630 5.5 5.2 106 7.1 6.2 115
DEER PARK 9700 6.8 -M * 10.0 -M *
HOBBS PARK 10100 8.7 9.0 97 8.8 8.1 109
LITTLE WARM 9620 7.4 6.2 119 8.4 7.8 108
SOUTH PASS 9040 7.9 10.0 79 9.4 9.4 100
ST. LAWRENCE ALT 8620 4.0 4.1 98 6.7 5.7 118
TOGWOTEE PASS 9580 -M 14.3 * 16.9 17.1 99
TOWNSEND CREEK 8700 4.6 5.4 85 7.1 6.8 104
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Basin wide percent of average 98 106
BIGHORN BASIN
BALD MTN. 9375 12.9 12.2 106 11.8 10.2 116
BEAR TRAP MEADOW 7900 4.1 4.3 95 6.6 4.9 135
BLACKWATER 9780 17.6 12.1 145 15.5 10.6 146
BONE SPRINGS DIV 9350 9.7 9.4 103 9.7 8.2 118
EVENING STAR 9200 21.1 15.7 134 22.0 13.1 168
GRAVE SPRINGS 8550 4.5 5.4 83 7.6 5.8 131
KIRWIN 9550 7.1 6.0 118 8.4 6.0 140
MARQUETTE 8760 4.9 4.6 107 5.8 5.3 109
MIDDLE POWDER 7760 4.7 6.9 68 10.8 6.9 157
OWL CREEK 8975 3.4 2.4 142 4.1 3.3 124
POWDER RIVER PASS 9480 7.5 6.1 123 9.5 6.7 142
SHELL CREEK 9580 11.0 9.1 121 10.1 7.7 131
SYLVAN LAKE 8420 15.7 13.0 121 18.1 11.6 156
SYLVAN ROAD 8120 10.5 7.2 146 12.4 9.6 129
TIMBER CREEK 7950 3.3 3.1 106 5.3 3.8 139
YOUNTS PEAK 8350 12.6 10.7 118 10.8 9.7 111
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Basin wide percent of average 117 137
SHOSHONE RIVER
BLACKWATER 9780 17.6 12.1 145 15.5 10.6 146
EVENING STAR 9200 21.1 15.7 134 22.0 13.1 168
KIRWIN 9550 7.1 6.0 118 8.4 6.0 140
MARQUETTE 8760 4.9 4.6 107 5.8 5.3 109
SYLVAN LAKE 8420 15.7 13.0 121 18.1 11.6 156
SYLVAN ROAD 8120 10.5 7.2 146 12.4 9.6 129
YOUNTS PEAK 8350 12.6 10.7 118 10.8 9.7 111
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Basin wide percent of average 129 141
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.1 4.3 95 6.6 4.9 135
BIG GOOSE 7990 3.5 -M * 6.4 -M *
BONE SPRINGS DIV 9350 9.7 9.4 103 9.7 8.2 118
BURGESS JUNCTION 7880 5.0 6.6 76 7.0 6.4 109
CLOUD PEAK RESERVOIR 9860 9.4 6.9 136 8.0 7.1 113
DOME LAKE 8880 5.1 7.8 65 7.2 7.8 92
GRAVE SPRINGS 8550 4.5 5.4 83 7.6 5.8 131
HANSEN SAWMILL 8760 3.3 4.0 82 5.6 4.5 124
MIDDLE POWDER 7760 4.7 6.9 68 10.8 6.9 157
POWDER RIVER PASS 9480 7.5 6.1 123 9.5 6.7 142
SUCKER CREEK 8880 6.3 6.4 98 8.4 7.6 111
TIE CREEK 6870 2.1 -M * 5.6 6.1 92
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Basin wide percent of average 93 119
BELLE FOURCHE
BLIND PARK 6890 4.6 6.3 73 11.6 5.5 211
NORTH RAPID CREEK 6130 3.8 -M * 10.4 -M *
WARREN PEAK 6520 5.7 6.3 90 10.7 4.6 233
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Basin wide percent of average 82 221
UPPER N. PLATTE RIVER
COLUMBINE 9400 10.0 13.2 76 11.9 13.7 87
DIVIDE PEAK 8800 9.4 11.6 81 15.2 14.1 108
ELK RIVER 8700 7.0 10.5 67 12.3 10.7 115
JOE WRIGHT 10120 10.2 12.3 83 15.1 14.1 107
NORTH FRENCH CREEK 10100 16.3 13.9 117 17.9 13.1 137
OLD BATTLE 10000 13.2 17.8 74 19.3 16.9 114
SOUTH BRUSH CREEK 8400 5.4 6.0 90 13.2 10.3 128
TOWER 10500 20.5 25.2 81 21.0 20.5 102
WEBBER SPRINGS 9200 9.2 15.0 61 14.1 15.0 94
WILLOW CREEK PASS 9540 5.0 6.6 76 7.0 7.0 100
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Basin wide percent of average 80 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 10.0 14.2 70 12.8 10.4 123
CASPER MTN. 7900 4.8 8.3 58 10.5 7.9 133
DEADMAN HILL 10220 9.2 9.7 95 10.7 8.9 120
DEER PARK 9700 6.8 -M * 10.0 -M *
LAPRELE CREEK 8320 1.6 5.7 28 8.1 6.4 127
RENO HILL 8400 6.6 7.4 89 10.9 10.6 103
ROACH 9700 8.6 9.5 91 11.5 12.3 93
SAND LAKE 10080 17.9 18.4 97 17.7 11.3 157
SOUTH PASS 9040 7.9 10.0 79 9.4 9.4 100
WINDY PEAK 7840 2.4 3.8 63 8.1 5.0 162
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Basin wide percent of average 79 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.2 6.2 84 10.0 9.3 108
DIVIDE PEAK 8800 9.4 11.6 81 15.2 14.1 108
OLD BATTLE 10000 13.2 17.8 74 19.3 16.9 114
SANDSTONE RS 8150 5.5 7.9 70 11.8 11.2 105
WHISKEY PARK 8950 11.8 15.8 75 16.5 16.0 103
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Basin wide percent of average 76 108
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.7 8.0 96 7.2 10.1 71
BLIND BULL SUM 8650 13.5 16.2 83 11.1 13.9 80
EAST RIM DIVIDE 7930 6.2 7.6 82 6.7 9.4 71
ELKHART PARK G.S. 9400 6.3 7.6 83 6.9 9.9 70
GROS VENTRE SUMMIT 8775 7.1 8.9 80 7.6 9.9 77
KENDALL R.S. 7740 6.9 8.3 83 7.6 9.6 79
LOOMIS PARK 8240 8.3 9.6 86 9.9 11.7 85
NEW FORK LAKE 8340 5.5 6.4 86 6.0 9.0 67
SNIDER BASIN 8250 6.7 8.1 83 7.4 9.4 79
SPRING CREEK DIVIDE 9000 12.9 15.1 85 13.3 16.4 81
TRIPLE PEAK 8500 12.7 14.4 88 14.5 19.3 75
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Basin wide percent of average 85 76
LOWER GREEN RIVER
HAMS FORK 7840 4.7 6.5 72 5.2 8.3 63
HEWINTA 9500 3.6 5.2 69 6.3 7.4 85
HICKERSON PARK 9150 2.6 3.1 84 5.3 5.4 98
HOLE-IN-ROCK 9150 3.4 2.8 121 5.9 5.4 109
INDIAN CREEK 9425 11.7 15.2 77 10.2 15.5 66
KELLEY R.S. 8180 6.7 8.8 76 8.4 11.6 72
STEEL CREEK PARK 10100 5.5 8.7 63 7.7 7.7 100
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Basin wide percent of average 76 80
UPPER BEAR RIVER
BUG LAKE 7950 5.8 11.1 52 7.7 11.2 69
HAYDEN FORK 9400 5.3 8.9 60 8.7 10.4 84
KELLEY R.S. 8180 6.7 8.8 76 8.4 11.6 72
LILY LAKE 9050 -M 7.3 * -M 8.4 *
MONTE CRISTO 8960 9.3 14.7 63 11.9 14.5 82
SALT RIVER SUMMIT 7600 6.0 7.2 83 8.3 10.5 79
TRIAL LAKE 9960 5.8 13.9 42 7.0 13.2 53
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Basin wide percent of average 60 73
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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.