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 THURSDAY: JANUARY 21 , 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 13.9 10.9 128 16.1 14.5 111
COTTONWOOD CREEK 7600 12.3 12.4 99 15.3 15.4 99
GRANITE CREEK 6770 11.0 10.7 103 13.1 15.3 86
GRASSY LAKE 7265 23.8 20.1 118 24.2 23.5 103
GROS VENTRE SUMMIT 8775 8.4 9.4 89 8.6 10.3 83
LEWIS LAKE DIVIDE 7860 22.8 19.8 115 24.1 23.9 101
PHILLIPS BENCH 8200 17.2 16.7 103 17.0 18.8 90
SALT RIVER SUMMIT 7600 7.8 7.7 101 10.1 11.0 92
SNAKE RIVER STATION 6920 -M 10.8 * -M 16.5 *
SPRING CREEK DIVIDE 9000 15.4 15.9 97 15.8 17.2 92
THUMB DIVIDE 7980 13.2 10.0 132 13.3 13.6 98
TOGWOTEE PASS 9580 -M 15.0 * 18.2 17.9 102
TWO OCEAN PLATEAU 9360 22.3 16.4 136 19.6 20.0 98
WILLOW CREEK 8450 16.8 18.3 92 21.8 20.2 108
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Basin wide percent of average 110 98
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.8 14.5 123 15.9 10.8 147
BLACK BEAR 7950 28.5 21.5 133 23.1 23.2 100
CANYON 7940 11.2 7.3 153 12.2 8.8 139
FISHER CREEK 9100 26.0 21.4 121 23.1 21.5 107
MADISON PLATEAU 7750 -M 14.1 * 17.8 15.3 116
NORTHEAST ENTRANCE 7350 7.9 5.6 141 9.8 7.4 132
PARKER PEAK 9400 15.3 13.1 117 -M 9.5 *
SYLVAN LAKE 8420 17.0 13.5 126 19.4 12.0 162
THUMB DIVIDE 7980 13.2 10.0 132 13.3 13.6 98
TWO OCEAN PLATEAU 9360 22.3 16.4 136 19.6 20.0 98
WHISKEY CREEK 6800 11.8 9.8 120 14.4 12.7 113
WHITE MILL 8700 17.0 15.1 113 15.5 17.0 91
WOLVERINE 7650 10.9 7.0 156 8.9 7.9 113
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Basin wide percent of average 128 113
WIND RIVER
BURROUGHS CREEK 8750 10.7 9.3 115 11.7 10.2 115
COLD SPRINGS 9630 6.1 5.3 115 7.6 6.4 119
DEER PARK 9700 9.0 -M * 12.6 -M *
HOBBS PARK 10100 9.5 9.3 102 9.5 8.4 113
LITTLE WARM 9620 8.2 6.5 126 9.2 8.1 114
SOUTH PASS 9040 10.1 10.3 98 11.5 9.8 117
ST. LAWRENCE ALT 8620 4.2 4.3 98 6.9 5.8 119
TOGWOTEE PASS 9580 -M 15.0 * 18.2 17.9 102
TOWNSEND CREEK 8700 5.0 5.6 89 7.5 7.1 106
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Basin wide percent of average 106 111
BIGHORN BASIN
BALD MTN. 9375 13.4 12.6 106 12.5 10.6 118
BEAR TRAP MEADOW 7900 4.2 4.4 95 6.9 5.0 138
BLACKWATER 9780 19.3 12.6 153 16.9 11.0 154
BONE SPRINGS DIV 9350 10.3 9.7 106 10.4 8.5 122
EVENING STAR 9200 22.6 16.2 140 23.2 13.7 169
GRAVE SPRINGS 8550 4.7 5.6 84 7.7 5.9 131
KIRWIN 9550 7.8 6.1 128 9.2 6.2 148
MARQUETTE 8760 5.3 4.7 113 6.2 5.4 115
MIDDLE POWDER 7760 4.8 7.2 67 10.9 7.2 151
OWL CREEK 8975 3.6 2.5 144 4.4 3.4 129
POWDER RIVER PASS 9480 8.0 6.4 125 10.1 7.0 144
SHELL CREEK 9580 11.5 9.4 122 10.7 8.0 134
SYLVAN LAKE 8420 17.0 13.5 126 19.4 12.0 162
SYLVAN ROAD 8120 11.5 7.5 153 13.4 10.0 134
TIMBER CREEK 7950 3.5 3.2 109 5.4 3.9 138
YOUNTS PEAK 8350 13.9 11.1 125 12.1 10.1 120
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Basin wide percent of average 122 140
SHOSHONE RIVER
BLACKWATER 9780 19.3 12.6 153 16.9 11.0 154
EVENING STAR 9200 22.6 16.2 140 23.2 13.7 169
KIRWIN 9550 7.8 6.1 128 9.2 6.2 148
MARQUETTE 8760 5.3 4.7 113 6.2 5.4 115
SYLVAN LAKE 8420 17.0 13.5 126 19.4 12.0 162
SYLVAN ROAD 8120 11.5 7.5 153 13.4 10.0 134
YOUNTS PEAK 8350 13.9 11.1 125 12.1 10.1 120
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Basin wide percent of average 136 147
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.2 4.4 95 6.9 5.0 138
BIG GOOSE 7990 3.6 -M * 6.4 -M *
BONE SPRINGS DIV 9350 10.3 9.7 106 10.4 8.5 122
BURGESS JUNCTION 7880 5.1 6.9 74 7.0 6.6 106
CLOUD PEAK RESERVOIR 9860 9.3 7.2 129 7.2 7.4 97
DOME LAKE 8880 5.4 8.1 67 7.3 8.1 90
GRAVE SPRINGS 8550 4.7 5.6 84 7.7 5.9 131
HANSEN SAWMILL 8760 3.4 4.1 83 5.6 4.6 122
MIDDLE POWDER 7760 4.8 7.2 67 10.9 7.2 151
POWDER RIVER PASS 9480 8.0 6.4 125 10.1 7.0 144
SUCKER CREEK 8880 6.6 6.7 99 8.6 7.9 109
TIE CREEK 6870 2.2 -M * 5.7 6.3 90
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Basin wide percent of average 93 117
BELLE FOURCHE
BLIND PARK 6890 4.9 6.6 74 12.0 5.6 214
NORTH RAPID CREEK 6130 3.8 -M * 10.5 -M *
WARREN PEAK 6520 5.9 6.6 89 10.8 4.7 230
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Basin wide percent of average 82 221
UPPER N. PLATTE RIVER
COLUMBINE 9400 12.4 13.9 89 14.2 14.4 99
DIVIDE PEAK 8800 10.4 12.1 86 16.1 14.6 110
ELK RIVER 8700 8.8 11.0 80 14.4 11.2 129
JOE WRIGHT 10120 12.3 12.8 96 17.5 14.8 118
NORTH FRENCH CREEK 10100 17.5 14.4 122 18.7 13.6 138
OLD BATTLE 10000 15.4 18.5 83 21.6 17.6 123
SOUTH BRUSH CREEK 8400 5.8 6.3 92 13.4 10.4 129
TOWER 10500 24.6 26.5 93 24.8 21.5 115
WEBBER SPRINGS 9200 10.9 15.7 69 15.7 15.4 102
WILLOW CREEK PASS 9540 5.8 6.8 85 7.5 7.2 104
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Basin wide percent of average 90 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 11.8 14.7 80 14.4 10.9 132
CASPER MTN. 7900 5.0 8.6 58 10.6 8.1 131
DEADMAN HILL 10220 11.0 10.1 109 11.9 9.3 128
DEER PARK 9700 9.0 -M * 12.6 -M *
LAPRELE CREEK 8320 1.6 6.0 27 8.2 6.7 122
RENO HILL 8400 6.7 7.7 87 11.1 10.8 103
ROACH 9700 10.0 9.9 101 12.9 12.8 101
SAND LAKE 10080 19.2 19.1 101 18.6 11.7 159
SOUTH PASS 9040 10.1 10.3 98 11.5 9.8 117
WINDY PEAK 7840 2.5 4.0 62 8.2 5.3 155
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Basin wide percent of average 86 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 6.0 6.5 92 10.6 9.7 109
DIVIDE PEAK 8800 10.4 12.1 86 16.1 14.6 110
OLD BATTLE 10000 15.4 18.5 83 21.6 17.6 123
SANDSTONE RS 8150 6.3 8.3 76 12.7 11.8 108
WHISKEY PARK 8950 14.4 16.5 87 18.8 17.1 110
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Basin wide percent of average 85 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 9.4 8.4 112 8.7 10.6 82
BLIND BULL SUM 8650 16.1 16.9 95 13.4 14.7 91
EAST RIM DIVIDE 7930 7.6 8.1 94 8.0 9.9 81
ELKHART PARK G.S. 9400 7.7 7.9 97 8.3 10.4 80
GROS VENTRE SUMMIT 8775 8.4 9.4 89 8.6 10.3 83
KENDALL R.S. 7740 8.3 8.7 95 9.0 10.1 89
LOOMIS PARK 8240 10.1 10.1 100 11.6 12.3 94
NEW FORK LAKE 8340 6.7 6.8 99 7.0 9.4 74
SNIDER BASIN 8250 8.2 8.6 95 8.8 9.9 89
SPRING CREEK DIVIDE 9000 15.4 15.9 97 15.8 17.2 92
TRIPLE PEAK 8500 14.9 15.2 98 16.6 20.2 82
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Basin wide percent of average 97 86
LOWER GREEN RIVER
HAMS FORK 7840 6.2 6.9 90 6.1 8.7 70
HEWINTA 9500 4.7 5.5 85 7.4 7.7 96
HICKERSON PARK 9150 3.0 3.2 94 5.7 5.6 102
HOLE-IN-ROCK 9150 3.7 2.9 128 6.3 5.6 113
INDIAN CREEK 9425 14.3 15.9 90 12.3 16.3 75
KELLEY R.S. 8180 8.5 9.3 91 10.2 12.2 84
STEEL CREEK PARK 10100 7.0 9.0 78 8.9 8.0 111
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Basin wide percent of average 90 89
UPPER BEAR RIVER
BUG LAKE 7950 8.2 11.6 71 9.6 11.6 83
HAYDEN FORK 9400 7.2 9.2 78 10.4 10.8 96
KELLEY R.S. 8180 8.5 9.3 91 10.2 12.2 84
LILY LAKE 9050 6.8 7.5 91 9.8 8.7 113
MONTE CRISTO 8960 12.0 15.4 78 14.2 15.0 95
SALT RIVER SUMMIT 7600 7.8 7.7 101 10.1 11.0 92
TRIAL LAKE 9960 8.8 14.4 61 9.8 13.7 72
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Basin wide percent of average 79 89
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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.