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 WEDNESDAY: FEBRUARY 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 19.1 14.3 134 -M 18.5 *
COTTONWOOD CREEK 7600 18.2 16.7 109 21.0 20.2 104
GRANITE CREEK 6770 16.8 14.1 119 18.6 19.4 96
GRASSY LAKE 7265 32.5 29.8 109 32.0 29.9 107
GROS VENTRE SUMMIT 8775 12.6 11.9 106 12.4 13.1 95
LEWIS LAKE DIVIDE 7860 31.5 26.8 118 28.5 30.4 94
PHILLIPS BENCH 8200 25.1 22.3 113 23.4 24.0 98
SALT RIVER SUMMIT 7600 12.5 10.8 116 14.7 13.9 106
SNAKE RIVER STATION 6920 -M 14.7 * -M 21.0 *
SPRING CREEK DIVIDE 9000 22.2 21.1 105 22.2 22.1 100
THUMB DIVIDE 7980 -M 13.1 * -M 17.3 *
TOGWOTEE PASS 9580 -M 19.2 * 23.2 22.7 102
TWO OCEAN PLATEAU 9360 29.5 20.7 143 23.3 25.5 91
WILLOW CREEK 8450 25.5 24.1 106 29.4 26.1 113
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Basin wide percent of average 115 101
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 21.3 18.3 116 19.0 13.8 138
BLACK BEAR 7950 40.5 28.8 141 -M 30.6 *
CANYON 7940 15.1 9.7 156 15.8 11.2 141
FISHER CREEK 9100 32.4 27.7 117 -M 28.1 *
MADISON PLATEAU 7750 -M 18.8 * 24.1 19.9 121
NORTHEAST ENTRANCE 7350 9.9 7.4 134 11.6 9.4 123
PARKER PEAK 9400 19.0 16.5 115 -M 12.0 *
SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158
THUMB DIVIDE 7980 -M 13.1 * -M 17.3 *
TWO OCEAN PLATEAU 9360 29.5 20.7 143 23.3 25.5 91
WHISKEY CREEK 6800 16.9 13.0 130 19.4 16.5 118
WHITE MILL 8700 21.4 19.6 109 19.2 21.9 88
WOLVERINE 7650 12.1 9.2 132 11.0 10.1 109
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Basin wide percent of average 128 117
WIND RIVER
BURROUGHS CREEK 8750 14.2 12.1 117 15.4 12.8 120
COLD SPRINGS 9630 8.1 6.5 125 9.9 7.8 127
DEER PARK 9700 14.3 -M * 18.7 -M *
HOBBS PARK 10100 14.4 11.2 129 13.4 10.3 130
LITTLE WARM 9620 11.4 8.3 137 12.5 10.0 125
SOUTH PASS 9040 15.2 12.9 118 16.4 12.5 131
ST. LAWRENCE ALT 8620 6.3 5.6 113 9.2 7.3 126
TOGWOTEE PASS 9580 -M 19.2 * 23.2 22.7 102
TOWNSEND CREEK 8700 8.4 7.2 117 11.0 8.9 124
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Basin wide percent of average 122 120
BIGHORN BASIN
BALD MTN. 9375 15.3 15.7 97 14.2 13.1 108
BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132
BLACKWATER 9780 24.5 16.3 150 20.7 13.9 149
BONE SPRINGS DIV 9350 12.4 12.2 102 12.6 10.7 118
EVENING STAR 9200 27.7 20.7 134 27.7 17.4 159
GRAVE SPRINGS 8550 5.6 6.9 81 8.6 7.0 123
KIRWIN 9550 10.5 7.4 142 12.2 7.8 156
MARQUETTE 8760 6.6 6.0 110 7.4 6.5 114
MIDDLE POWDER 7760 6.3 8.8 72 12.1 8.6 141
OWL CREEK 8975 5.3 3.3 161 5.9 4.4 134
POWDER RIVER PASS 9480 9.9 8.0 124 11.8 8.7 136
SHELL CREEK 9580 13.5 11.7 115 12.6 9.9 127
SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158
SYLVAN ROAD 8120 14.3 10.1 142 16.3 12.5 130
TIMBER CREEK 7950 4.5 4.4 102 6.3 4.7 134
YOUNTS PEAK 8350 17.6 13.7 128 15.5 12.8 121
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Basin wide percent of average 120 136
SHOSHONE RIVER
BLACKWATER 9780 24.5 16.3 150 20.7 13.9 149
EVENING STAR 9200 27.7 20.7 134 27.7 17.4 159
KIRWIN 9550 10.5 7.4 142 12.2 7.8 156
MARQUETTE 8760 6.6 6.0 110 7.4 6.5 114
SYLVAN LAKE 8420 21.8 17.0 128 23.7 15.0 158
SYLVAN ROAD 8120 14.3 10.1 142 16.3 12.5 130
YOUNTS PEAK 8350 17.6 13.7 128 15.5 12.8 121
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Basin wide percent of average 135 144
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.5 5.5 100 7.8 5.9 132
BIG GOOSE 7990 4.7 -M * 7.7 -M *
BONE SPRINGS DIV 9350 12.4 12.2 102 12.6 10.7 118
BURGESS JUNCTION 7880 6.3 8.8 72 8.2 8.0 102
CLOUD PEAK RESERVOIR 9860 11.4 9.8 116 9.8 9.4 104
DOME LAKE 8880 6.5 10.3 63 8.9 9.7 92
GRAVE SPRINGS 8550 5.6 6.9 81 8.6 7.0 123
HANSEN SAWMILL 8760 4.3 5.3 81 6.8 5.6 121
MIDDLE POWDER 7760 6.3 8.8 72 12.1 8.6 141
POWDER RIVER PASS 9480 9.9 8.0 124 11.8 8.7 136
SUCKER CREEK 8880 7.8 8.8 89 10.1 9.7 104
TIE CREEK 6870 2.6 -M * 6.3 7.6 83
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Basin wide percent of average 90 113
BELLE FOURCHE
BLIND PARK 6890 5.6 8.3 67 12.6 7.0 180
NORTH RAPID CREEK 6130 4.3 -M * 11.0 -M *
WARREN PEAK 6520 6.6 8.3 80 11.1 5.8 191
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Basin wide percent of average 73 185
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.5 18.8 82 16.7 18.7 89
DIVIDE PEAK 8800 15.3 15.3 100 20.8 17.6 118
ELK RIVER 8700 -M 15.1 * 18.0 14.2 127
JOE WRIGHT 10120 15.8 16.0 99 21.3 18.6 115
NORTH FRENCH CREEK 10100 22.4 18.5 121 23.3 17.3 135
OLD BATTLE 10000 21.5 23.8 90 27.7 22.3 124
SOUTH BRUSH CREEK 8400 5.2 8.4 62 16.1 12.0 134
TOWER 10500 32.9 34.3 96 30.9 27.5 112
WEBBER SPRINGS 9200 14.5 20.3 71 20.3 18.9 107
WILLOW CREEK PASS 9540 9.5 8.4 113 10.1 9.0 112
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Basin wide percent of average 93 117
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.7 18.2 86 17.2 14.0 123
CASPER MTN. 7900 8.3 11.0 75 13.3 9.9 134
DEADMAN HILL 10220 12.8 12.6 102 14.2 11.8 120
DEER PARK 9700 14.3 -M * 18.7 -M *
LAPRELE CREEK 8320 -M 7.6 * 10.7 8.5 126
RENO HILL 8400 9.7 9.7 100 14.2 13.2 108
ROACH 9700 13.6 12.7 107 16.0 16.0 100
SAND LAKE 10080 25.3 24.5 103 22.3 15.0 149
SOUTH PASS 9040 15.2 12.9 118 16.4 12.5 131
WINDY PEAK 7840 4.0 5.4 74 10.0 6.6 152
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Basin wide percent of average 98 125
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.9 8.7 125 14.8 11.9 124
DIVIDE PEAK 8800 15.3 15.3 100 20.8 17.6 118
OLD BATTLE 10000 21.5 23.8 90 27.7 22.3 124
SANDSTONE RS 8150 10.2 11.0 93 16.8 14.5 116
WHISKEY PARK 8950 19.6 21.4 92 22.9 21.4 107
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Basin wide percent of average 97 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.2 10.9 121 12.3 13.4 92
BLIND BULL SUM 8650 23.2 22.2 105 18.4 19.2 96
EAST RIM DIVIDE 7930 11.2 10.8 104 11.6 12.5 93
ELKHART PARK G.S. 9400 11.3 10.5 108 11.8 13.2 89
GROS VENTRE SUMMIT 8775 12.6 11.9 106 12.4 13.1 95
KENDALL R.S. 7740 12.9 11.4 113 12.8 12.8 100
LOOMIS PARK 8240 -M 13.6 * 16.5 15.5 106
NEW FORK LAKE 8340 10.3 9.0 114 10.3 11.9 87
SNIDER BASIN 8250 12.9 11.5 112 12.9 12.5 103
SPRING CREEK DIVIDE 9000 22.2 21.1 105 22.2 22.1 100
TRIPLE PEAK 8500 20.7 20.0 104 22.1 25.7 86
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Basin wide percent of average 108 95
LOWER GREEN RIVER
HAMS FORK 7840 10.1 9.6 105 8.8 11.0 80
HEWINTA 9500 7.9 7.5 105 10.5 9.4 112
HICKERSON PARK 9150 5.1 4.4 116 7.6 6.7 113
HOLE-IN-ROCK 9150 5.1 4.0 128 8.0 6.7 119
INDIAN CREEK 9425 22.7 20.9 109 18.8 20.7 91
KELLEY R.S. 8180 13.1 12.8 102 14.8 15.5 95
STEEL CREEK PARK 10100 10.5 11.1 95 12.4 9.6 129
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Basin wide percent of average 106 102
UPPER BEAR RIVER
BUG LAKE 7950 15.8 15.1 105 14.9 14.6 102
HAYDEN FORK 9400 10.7 12.2 88 15.0 13.8 109
KELLEY R.S. 8180 13.1 12.8 102 14.8 15.5 95
LILY LAKE 9050 9.9 9.7 102 13.7 10.8 127
MONTE CRISTO 8960 19.6 20.4 96 20.2 19.0 106
SALT RIVER SUMMIT 7600 12.5 10.8 116 14.7 13.9 106
TRIAL LAKE 9960 15.2 18.6 82 16.2 17.8 91
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Basin wide percent of average 97 104
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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.