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 MONDAY: JANUARY 18 , 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 12.1 10.5 115 14.2 14.0 101
COTTONWOOD CREEK 7600 10.9 11.9 92 14.0 14.9 94
GRANITE CREEK 6770 9.0 10.2 88 10.9 14.8 74
GRASSY LAKE 7265 21.4 19.3 111 22.1 22.7 97
GROS VENTRE SUMMIT 8775 7.3 9.0 81 7.6 10.0 76
LEWIS LAKE DIVIDE 7860 20.0 19.0 105 21.6 23.1 94
PHILLIPS BENCH 8200 15.4 16.0 96 15.8 18.1 87
SALT RIVER SUMMIT 7600 6.2 7.4 84 8.5 10.6 80
SNAKE RIVER STATION 6920 11.5 10.4 111 14.3 16.0 89
SPRING CREEK DIVIDE 9000 13.3 15.3 87 13.4 16.6 81
THUMB DIVIDE 7980 12.0 9.7 124 12.2 13.1 93
TOGWOTEE PASS 9580 -M 14.4 * 17.0 17.3 98
TWO OCEAN PLATEAU 9360 20.2 15.8 128 17.9 19.3 93
WILLOW CREEK 8450 14.6 17.5 83 19.8 19.5 102
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Basin wide percent of average 101 91
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 16.7 14.1 118 15.0 10.5 143
BLACK BEAR 7950 26.2 20.6 127 22.9 22.3 103
CANYON 7940 10.2 7.1 144 11.2 8.5 132
FISHER CREEK 9100 24.6 20.6 119 21.9 20.7 106
MADISON PLATEAU 7750 -M 13.5 * 16.4 14.8 111
NORTHEAST ENTRANCE 7350 7.4 5.4 137 9.2 7.2 128
PARKER PEAK 9400 14.2 12.7 112 -M 9.2 *
SYLVAN LAKE 8420 15.9 13.2 120 18.3 11.7 156
THUMB DIVIDE 7980 12.0 9.7 124 12.2 13.1 93
TWO OCEAN PLATEAU 9360 20.2 15.8 128 17.9 19.3 93
WHISKEY CREEK 6800 11.0 9.4 117 13.5 12.3 110
WHITE MILL 8700 15.9 14.6 109 14.5 16.4 88
WOLVERINE 7650 10.1 6.7 151 8.4 7.7 109
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Basin wide percent of average 123 110
WIND RIVER
BURROUGHS CREEK 8750 9.8 9.0 109 10.7 9.9 108
COLD SPRINGS 9630 5.6 5.2 108 7.2 6.3 114
DEER PARK 9700 6.7 -M * 10.1 -M *
HOBBS PARK 10100 8.8 9.1 97 9.0 8.2 110
LITTLE WARM 9620 7.5 6.3 119 8.6 7.9 109
SOUTH PASS 9040 7.9 10.1 78 9.5 9.5 100
ST. LAWRENCE ALT 8620 4.1 4.1 100 6.8 5.7 119
TOGWOTEE PASS 9580 -M 14.4 * 17.0 17.3 98
TOWNSEND CREEK 8700 4.7 5.5 85 7.3 6.9 106
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Basin wide percent of average 98 106
BIGHORN BASIN
BALD MTN. 9375 13.1 12.3 107 12.0 10.3 117
BEAR TRAP MEADOW 7900 4.1 4.3 95 6.7 4.9 137
BLACKWATER 9780 17.8 12.3 145 15.7 10.7 147
BONE SPRINGS DIV 9350 9.9 9.4 105 9.7 8.3 117
EVENING STAR 9200 21.3 15.8 135 22.1 13.3 166
GRAVE SPRINGS 8550 4.5 5.4 83 7.5 5.8 129
KIRWIN 9550 7.2 6.0 120 8.5 6.1 139
MARQUETTE 8760 5.2 4.6 113 6.1 5.3 115
MIDDLE POWDER 7760 4.7 7.0 67 10.9 7.0 156
OWL CREEK 8975 3.7 2.5 148 4.4 3.3 133
POWDER RIVER PASS 9480 7.6 6.2 123 9.6 6.8 141
SHELL CREEK 9580 11.1 9.1 122 10.2 7.8 131
SYLVAN LAKE 8420 15.9 13.2 120 18.3 11.7 156
SYLVAN ROAD 8120 10.6 7.3 145 12.5 9.7 129
TIMBER CREEK 7950 3.3 3.1 106 5.3 3.8 139
YOUNTS PEAK 8350 12.7 10.8 118 10.8 9.8 110
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Basin wide percent of average 118 137
SHOSHONE RIVER
BLACKWATER 9780 17.8 12.3 145 15.7 10.7 147
EVENING STAR 9200 21.3 15.8 135 22.1 13.3 166
KIRWIN 9550 7.2 6.0 120 8.5 6.1 139
MARQUETTE 8760 5.2 4.6 113 6.1 5.3 115
SYLVAN LAKE 8420 15.9 13.2 120 18.3 11.7 156
SYLVAN ROAD 8120 10.6 7.3 145 12.5 9.7 129
YOUNTS PEAK 8350 12.7 10.8 118 10.8 9.8 110
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Basin wide percent of average 130 141
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.1 4.3 95 6.7 4.9 137
BIG GOOSE 7990 3.6 -M * 6.4 -M *
BONE SPRINGS DIV 9350 9.9 9.4 105 9.7 8.3 117
BURGESS JUNCTION 7880 5.0 6.7 75 7.1 6.4 111
CLOUD PEAK RESERVOIR 9860 9.4 6.9 136 8.3 7.2 115
DOME LAKE 8880 5.3 7.8 68 7.3 7.9 92
GRAVE SPRINGS 8550 4.5 5.4 83 7.5 5.8 129
HANSEN SAWMILL 8760 3.3 4.0 82 5.6 4.5 124
MIDDLE POWDER 7760 4.7 7.0 67 10.9 7.0 156
POWDER RIVER PASS 9480 7.6 6.2 123 9.6 6.8 141
SUCKER CREEK 8880 6.5 6.4 102 8.5 7.7 110
TIE CREEK 6870 2.2 -M * 5.8 6.2 94
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Basin wide percent of average 94 120
BELLE FOURCHE
BLIND PARK 6890 -M 6.4 * 11.5 5.5 209
NORTH RAPID CREEK 6130 3.7 -M * 10.3 -M *
WARREN PEAK 6520 5.6 6.4 88 10.7 4.6 233
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Basin wide percent of average 88* 220
UPPER N. PLATTE RIVER
COLUMBINE 9400 10.5 13.3 79 12.2 13.9 88
DIVIDE PEAK 8800 9.5 11.7 81 15.2 14.2 107
ELK RIVER 8700 7.1 10.6 67 12.6 10.8 117
JOE WRIGHT 10120 10.6 12.4 85 15.6 14.3 109
NORTH FRENCH CREEK 10100 16.4 14.0 117 17.9 13.2 136
OLD BATTLE 10000 13.3 17.9 74 19.4 17.1 113
SOUTH BRUSH CREEK 8400 5.1 6.1 84 13.1 10.3 127
TOWER 10500 21.2 25.6 83 21.5 20.8 103
WEBBER SPRINGS 9200 9.3 15.2 61 14.2 15.1 94
WILLOW CREEK PASS 9540 5.1 6.6 77 6.9 7.0 99
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Basin wide percent of average 81 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 10.1 14.4 70 12.9 10.5 123
CASPER MTN. 7900 4.8 8.4 57 10.4 7.9 132
DEADMAN HILL 10220 10.3 9.8 105 10.7 9.0 119
DEER PARK 9700 6.7 -M * 10.1 -M *
LAPRELE CREEK 8320 1.5 5.8 26 8.1 6.5 125
RENO HILL 8400 6.7 7.5 89 11.0 10.6 104
ROACH 9700 8.7 9.6 91 11.6 12.4 94
SAND LAKE 10080 18.1 18.6 97 17.8 11.4 156
SOUTH PASS 9040 7.9 10.1 78 9.5 9.5 100
WINDY PEAK 7840 2.3 3.8 61 8.0 5.1 157
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Basin wide percent of average 80 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.4 6.3 86 10.0 9.4 106
DIVIDE PEAK 8800 9.5 11.7 81 15.2 14.2 107
OLD BATTLE 10000 13.3 17.9 74 19.4 17.1 113
SANDSTONE RS 8150 5.5 8.0 69 11.8 11.4 104
WHISKEY PARK 8950 12.0 16.0 75 16.6 16.3 102
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Basin wide percent of average 76 107
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.8 8.1 96 7.2 10.2 71
BLIND BULL SUM 8650 13.7 16.4 84 11.3 14.1 80
EAST RIM DIVIDE 7930 6.3 7.7 82 6.8 9.5 72
ELKHART PARK G.S. 9400 6.4 7.7 83 7.0 10.0 70
GROS VENTRE SUMMIT 8775 7.3 9.0 81 7.6 10.0 76
KENDALL R.S. 7740 7.0 8.4 83 7.7 9.7 79
LOOMIS PARK 8240 8.4 9.7 87 9.9 11.9 83
NEW FORK LAKE 8340 5.6 6.5 86 6.0 9.1 66
SNIDER BASIN 8250 6.9 8.3 83 7.6 9.5 80
SPRING CREEK DIVIDE 9000 13.3 15.3 87 13.4 16.6 81
TRIPLE PEAK 8500 13.0 14.6 89 14.7 19.5 75
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Basin wide percent of average 86 76
LOWER GREEN RIVER
HAMS FORK 7840 4.9 6.6 74 5.3 8.4 63
HEWINTA 9500 3.9 5.3 74 6.5 7.5 87
HICKERSON PARK 9150 2.7 3.1 87 5.6 5.5 102
HOLE-IN-ROCK 9150 3.5 2.8 125 6.0 5.5 109
INDIAN CREEK 9425 12.0 15.3 78 10.5 15.7 67
KELLEY R.S. 8180 6.8 9.0 76 8.5 11.8 72
STEEL CREEK PARK 10100 5.9 8.7 68 8.0 7.8 103
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Basin wide percent of average 78 81
UPPER BEAR RIVER
BUG LAKE 7950 5.9 11.3 52 7.9 11.3 70
HAYDEN FORK 9400 5.5 9.0 61 9.0 10.5 86
KELLEY R.S. 8180 6.8 9.0 76 8.5 11.8 72
LILY LAKE 9050 -M 7.4 * -M 8.5 *
MONTE CRISTO 8960 9.5 14.8 64 12.2 14.6 84
SALT RIVER SUMMIT 7600 6.2 7.4 84 8.5 10.6 80
TRIAL LAKE 9960 6.0 14.0 43 7.2 13.3 54
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Basin wide percent of average 61 74
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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.