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 SATURDAY: FEBRUARY 27 , 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 22.9 15.5 148 24.1 19.8 122
COTTONWOOD CREEK 7600 21.6 18.2 119 23.9 21.9 109
GRANITE CREEK 6770 19.3 15.2 127 20.9 20.8 100
GRASSY LAKE 7265 37.6 29.6 127 36.7 32.1 114
GROS VENTRE SUMMIT 8775 13.7 12.7 108 13.6 14.0 97
LEWIS LAKE DIVIDE 7860 36.8 29.1 126 29.4 32.6 90
PHILLIPS BENCH 8200 29.4 23.9 123 25.0 25.8 97
SALT RIVER SUMMIT 7600 14.2 11.9 119 16.2 14.9 109
SNAKE RIVER STATION 6920 20.1 16.0 126 23.3 22.5 104
SPRING CREEK DIVIDE 9000 25.4 22.9 111 24.7 23.8 104
THUMB DIVIDE 7980 21.0 14.1 149 19.7 18.6 106
TOGWOTEE PASS 9580 -M 20.5 * 25.4 24.4 104
TWO OCEAN PLATEAU 9360 32.6 21.9 149 23.4 27.3 86
WILLOW CREEK 8450 29.1 25.5 114 33.0 28.2 117
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Basin wide percent of average 126 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 23.1 19.6 118 20.8 14.9 140
BLACK BEAR 7950 45.7 31.2 146 -M 33.2 *
CANYON 7940 16.3 10.5 155 16.9 11.9 142
FISHER CREEK 9100 35.9 29.9 120 -M 30.3 *
MADISON PLATEAU 7750 -M 20.3 * 24.5 21.5 114
NORTHEAST ENTRANCE 7350 11.0 8.0 138 12.8 10.1 127
PARKER PEAK 9400 20.6 17.7 116 -M 12.9 *
SYLVAN LAKE 8420 23.1 18.3 126 25.0 16.1 155
THUMB DIVIDE 7980 21.0 14.1 149 19.7 18.6 106
TWO OCEAN PLATEAU 9360 32.6 21.9 149 23.4 27.3 86
WHISKEY CREEK 6800 18.9 14.3 132 19.5 17.7 110
WHITE MILL 8700 24.2 20.9 116 21.5 23.5 91
WOLVERINE 7650 12.8 10.0 128 11.6 10.8 107
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Basin wide percent of average 132 114
WIND RIVER
BURROUGHS CREEK 8750 15.5 12.9 120 16.9 13.8 122
COLD SPRINGS 9630 8.5 6.9 123 10.4 8.3 125
DEER PARK 9700 14.7 -M * 19.7 -M *
HOBBS PARK 10100 15.2 11.9 128 14.0 11.1 126
LITTLE WARM 9620 12.1 9.1 133 13.4 10.7 125
SOUTH PASS 9040 15.9 13.8 115 17.0 13.6 125
ST. LAWRENCE ALT 8620 6.3 6.1 103 9.3 7.9 118
TOGWOTEE PASS 9580 -M 20.5 * 25.4 24.4 104
TOWNSEND CREEK 8700 8.3 7.9 105 11.1 9.7 114
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Basin wide percent of average 119 118
BIGHORN BASIN
BALD MTN. 9375 17.5 16.8 104 16.2 13.9 117
BEAR TRAP MEADOW 7900 6.0 5.8 103 8.0 6.2 129
BLACKWATER 9780 26.9 17.7 152 22.5 15.0 150
BONE SPRINGS DIV 9350 13.5 13.2 102 13.6 11.5 118
EVENING STAR 9200 30.1 22.2 136 28.3 18.7 151
GRAVE SPRINGS 8550 6.5 7.5 87 9.4 7.3 129
KIRWIN 9550 -M 8.0 * 12.9 8.5 152
MARQUETTE 8760 -M 6.4 * 7.3 7.0 104
MIDDLE POWDER 7760 7.4 9.6 77 13.0 9.1 143
OWL CREEK 8975 5.3 3.6 147 5.8 4.8 121
POWDER RIVER PASS 9480 10.9 8.7 125 12.9 9.3 139
SHELL CREEK 9580 14.5 12.4 117 13.5 10.5 129
SYLVAN LAKE 8420 23.1 18.3 126 25.0 16.1 155
SYLVAN ROAD 8120 15.6 11.0 142 17.7 13.4 132
TIMBER CREEK 7950 4.6 4.8 96 6.3 5.0 126
YOUNTS PEAK 8350 19.3 14.6 132 17.0 13.7 124
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Basin wide percent of average 121 135
SHOSHONE RIVER
BLACKWATER 9780 26.9 17.7 152 22.5 15.0 150
EVENING STAR 9200 30.1 22.2 136 28.3 18.7 151
KIRWIN 9550 -M 8.0 * 12.9 8.5 152
MARQUETTE 8760 -M 6.4 * 7.3 7.0 104
SYLVAN LAKE 8420 23.1 18.3 126 25.0 16.1 155
SYLVAN ROAD 8120 15.6 11.0 142 17.7 13.4 132
YOUNTS PEAK 8350 19.3 14.6 132 17.0 13.7 124
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Basin wide percent of average 137 141
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.0 5.8 103 8.0 6.2 129
BIG GOOSE 7990 4.8 -M * 7.8 -M *
BONE SPRINGS DIV 9350 13.5 13.2 102 13.6 11.5 118
BURGESS JUNCTION 7880 6.8 9.5 72 8.7 8.5 102
CLOUD PEAK RESERVOIR 9860 12.3 10.9 113 10.4 10.1 103
DOME LAKE 8880 6.8 11.1 61 9.7 10.3 94
GRAVE SPRINGS 8550 6.5 7.5 87 9.4 7.3 129
HANSEN SAWMILL 8760 4.4 5.6 79 6.9 5.9 117
MIDDLE POWDER 7760 7.4 9.6 77 13.0 9.1 143
POWDER RIVER PASS 9480 10.9 8.7 125 12.9 9.3 139
SUCKER CREEK 8880 8.3 9.6 86 10.6 10.4 102
TIE CREEK 6870 2.9 -M * 6.8 8.1 84
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Basin wide percent of average 91 114
BELLE FOURCHE
BLIND PARK 6890 7.1 9.0 79 14.1 7.5 188
NORTH RAPID CREEK 6130 4.9 -M * 11.5 -M *
WARREN PEAK 6520 9.0 9.0 100 12.8 6.1 210
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Basin wide percent of average 89 198
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.2 20.6 88 18.9 20.2 94
DIVIDE PEAK 8800 16.3 16.6 98 21.8 18.5 118
ELK RIVER 8700 16.1 16.4 98 19.3 15.3 126
JOE WRIGHT 10120 17.3 17.2 101 22.7 19.9 114
NORTH FRENCH CREEK 10100 25.3 20.1 126 25.7 18.6 138
OLD BATTLE 10000 24.1 25.8 93 30.8 24.1 128
SOUTH BRUSH CREEK 8400 11.3 9.2 123 16.9 12.7 133
TOWER 10500 37.8 36.8 103 34.1 29.6 115
WEBBER SPRINGS 9200 16.4 22.0 75 22.3 20.4 109
WILLOW CREEK PASS 9540 10.0 9.1 110 10.3 9.8 105
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Basin wide percent of average 99 118
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.1 19.6 92 19.3 15.3 126
CASPER MTN. 7900 9.4 12.1 78 14.2 10.6 134
DEADMAN HILL 10220 -M 13.3 * 15.0 12.8 117
DEER PARK 9700 14.7 -M * 19.7 -M *
LAPRELE CREEK 8320 -M 8.3 * 12.6 9.0 140
RENO HILL 8400 11.3 10.6 107 15.8 14.4 110
ROACH 9700 14.4 13.8 104 16.8 17.1 98
SAND LAKE 10080 28.8 26.4 109 24.8 16.2 153
SOUTH PASS 9040 15.9 13.8 115 17.0 13.6 125
WINDY PEAK 7840 5.3 6.1 87 11.2 7.0 160
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Basin wide percent of average 101 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.1 9.7 125 15.6 12.5 125
DIVIDE PEAK 8800 16.3 16.6 98 21.8 18.5 118
OLD BATTLE 10000 24.1 25.8 93 30.8 24.1 128
SANDSTONE RS 8150 11.6 12.0 97 18.1 15.3 118
WHISKEY PARK 8950 23.1 23.2 100 23.7 22.3 106
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Basin wide percent of average 100 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.9 11.9 117 13.1 14.3 92
BLIND BULL SUM 8650 25.9 23.9 108 20.2 20.7 98
EAST RIM DIVIDE 7930 12.4 11.8 105 12.7 13.4 95
ELKHART PARK G.S. 9400 12.2 11.3 108 12.6 14.1 89
GROS VENTRE SUMMIT 8775 13.7 12.7 108 13.6 14.0 97
KENDALL R.S. 7740 14.3 12.3 116 14.4 13.7 105
LOOMIS PARK 8240 -M 14.7 * 18.3 16.6 110
NEW FORK LAKE 8340 11.3 9.8 115 10.8 12.7 85
SNIDER BASIN 8250 14.9 12.6 118 14.7 13.4 110
SPRING CREEK DIVIDE 9000 25.4 22.9 111 24.7 23.8 104
TRIPLE PEAK 8500 24.4 21.4 114 25.2 27.5 92
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Basin wide percent of average 112 98
LOWER GREEN RIVER
HAMS FORK 7840 12.7 10.3 123 9.8 11.8 83
HEWINTA 9500 9.7 8.3 117 12.1 10.1 120
HICKERSON PARK 9150 5.7 4.9 116 8.2 7.1 115
HOLE-IN-ROCK 9150 6.0 4.4 136 8.6 7.1 121
INDIAN CREEK 9425 25.4 22.6 112 20.8 22.2 94
KELLEY R.S. 8180 14.8 14.0 106 16.4 16.6 99
STEEL CREEK PARK 10100 12.2 12.4 98 14.1 10.2 138
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Basin wide percent of average 112 106
UPPER BEAR RIVER
BUG LAKE 7950 19.1 16.7 114 17.2 15.7 110
HAYDEN FORK 9400 13.4 13.5 99 16.9 15.0 113
KELLEY R.S. 8180 14.8 14.0 106 16.4 16.6 99
LILY LAKE 9050 11.6 10.4 112 15.5 11.5 135
MONTE CRISTO 8960 23.2 23.0 101 23.0 20.5 112
SALT RIVER SUMMIT 7600 14.2 11.9 119 16.2 14.9 109
TRIAL LAKE 9960 17.8 20.8 86 18.7 19.4 96
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Basin wide percent of average 103 109
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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.