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: FEBRUARY 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 20.6 14.8 139 -M 19.0 *
COTTONWOOD CREEK 7600 20.1 17.3 116 22.9 20.9 110
GRANITE CREEK 6770 18.2 14.5 126 19.9 20.0 100
GRASSY LAKE 7265 34.6 29.7 116 34.0 30.8 110
GROS VENTRE SUMMIT 8775 13.2 12.2 108 13.0 13.5 96
LEWIS LAKE DIVIDE 7860 33.3 27.7 120 28.5 31.3 91
PHILLIPS BENCH 8200 26.8 22.9 117 23.6 24.7 96
SALT RIVER SUMMIT 7600 13.6 11.2 121 15.6 14.3 109
SNAKE RIVER STATION 6920 18.4 15.2 121 21.8 21.6 101
SPRING CREEK DIVIDE 9000 23.9 21.8 110 23.7 22.8 104
THUMB DIVIDE 7980 19.7 13.5 146 18.6 17.8 104
TOGWOTEE PASS 9580 -M 19.7 * 24.4 23.4 104
TWO OCEAN PLATEAU 9360 30.8 21.2 145 23.3 26.2 89
WILLOW CREEK 8450 27.5 24.7 111 31.3 26.9 116
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Basin wide percent of average 122 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 21.8 18.8 116 19.4 14.2 137
BLACK BEAR 7950 42.0 29.8 141 -M 31.6 *
CANYON 7940 15.7 10.0 157 16.2 11.5 141
FISHER CREEK 9100 33.5 28.6 117 -M 29.0 *
MADISON PLATEAU 7750 -M 19.4 * 24.2 20.5 118
NORTHEAST ENTRANCE 7350 10.5 7.6 138 12.1 9.7 125
PARKER PEAK 9400 19.7 17.0 116 -M 12.4 *
SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157
THUMB DIVIDE 7980 19.7 13.5 146 18.6 17.8 104
TWO OCEAN PLATEAU 9360 30.8 21.2 145 23.3 26.2 89
WHISKEY CREEK 6800 17.7 13.5 131 19.3 17.0 114
WHITE MILL 8700 22.5 20.1 112 20.3 22.5 90
WOLVERINE 7650 12.4 9.5 131 11.3 10.4 109
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Basin wide percent of average 130 114
WIND RIVER
BURROUGHS CREEK 8750 14.8 12.4 119 16.2 13.2 123
COLD SPRINGS 9630 8.1 6.7 121 10.0 8.0 125
DEER PARK 9700 14.8 -M * 19.3 -M *
HOBBS PARK 10100 14.6 11.5 127 13.8 10.6 130
LITTLE WARM 9620 11.7 8.6 136 12.8 10.3 124
SOUTH PASS 9040 15.7 13.3 118 16.8 12.9 130
ST. LAWRENCE ALT 8620 6.3 5.8 109 9.2 7.5 123
TOGWOTEE PASS 9580 -M 19.7 * 24.4 23.4 104
TOWNSEND CREEK 8700 8.3 7.5 111 11.0 9.2 120
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Basin wide percent of average 121 120
BIGHORN BASIN
BALD MTN. 9375 16.3 16.1 101 15.1 13.4 113
BEAR TRAP MEADOW 7900 5.7 5.6 102 7.9 6.0 132
BLACKWATER 9780 25.3 16.9 150 21.5 14.3 150
BONE SPRINGS DIV 9350 12.8 12.6 102 12.9 11.0 117
EVENING STAR 9200 28.7 21.3 135 27.6 17.9 154
GRAVE SPRINGS 8550 5.9 7.1 83 8.8 7.1 124
KIRWIN 9550 10.8 7.6 142 12.5 8.1 154
MARQUETTE 8760 6.7 6.2 108 7.4 6.7 110
MIDDLE POWDER 7760 6.5 9.1 71 12.2 8.8 139
OWL CREEK 8975 5.3 3.4 156 5.8 4.6 126
POWDER RIVER PASS 9480 10.4 8.3 125 -M 8.9 *
SHELL CREEK 9580 14.0 12.0 117 13.1 10.1 130
SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157
SYLVAN ROAD 8120 -M 10.5 * -M 12.9 *
TIMBER CREEK 7950 4.5 4.6 98 6.3 4.8 131
YOUNTS PEAK 8350 18.4 14.1 130 16.2 13.2 123
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Basin wide percent of average 119 135
SHOSHONE RIVER
BLACKWATER 9780 25.3 16.9 150 21.5 14.3 150
EVENING STAR 9200 28.7 21.3 135 27.6 17.9 154
KIRWIN 9550 10.8 7.6 142 12.5 8.1 154
MARQUETTE 8760 6.7 6.2 108 7.4 6.7 110
SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157
SYLVAN ROAD 8120 -M 10.5 * -M 12.9 *
YOUNTS PEAK 8350 18.4 14.1 130 16.2 13.2 123
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Basin wide percent of average 134 145
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.7 5.6 102 7.9 6.0 132
BIG GOOSE 7990 4.8 -M * 7.7 -M *
BONE SPRINGS DIV 9350 12.8 12.6 102 12.9 11.0 117
BURGESS JUNCTION 7880 6.5 9.1 71 8.4 8.2 102
CLOUD PEAK RESERVOIR 9860 11.6 10.2 114 9.7 9.7 100
DOME LAKE 8880 6.7 10.6 63 9.5 9.9 96
GRAVE SPRINGS 8550 5.9 7.1 83 8.8 7.1 124
HANSEN SAWMILL 8760 4.3 5.4 80 6.9 5.7 121
MIDDLE POWDER 7760 6.5 9.1 71 12.2 8.8 139
POWDER RIVER PASS 9480 10.4 8.3 125 -M 8.9 *
SUCKER CREEK 8880 8.1 9.1 89 10.3 10.0 103
TIE CREEK 6870 2.7 -M * 6.5 7.8 83
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Basin wide percent of average 90 111
BELLE FOURCHE
BLIND PARK 6890 6.1 8.6 71 13.1 7.2 182
NORTH RAPID CREEK 6130 4.6 -M * 11.1 -M *
WARREN PEAK 6520 7.5 8.6 87 11.7 5.9 198
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Basin wide percent of average 79 189
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.8 19.5 86 17.5 19.3 91
DIVIDE PEAK 8800 16.0 15.8 101 20.7 18.0 115
ELK RIVER 8700 15.1 15.6 97 18.7 14.6 128
JOE WRIGHT 10120 16.2 16.5 98 22.0 19.1 115
NORTH FRENCH CREEK 10100 23.8 19.1 125 24.6 17.8 138
OLD BATTLE 10000 23.3 24.6 95 29.8 23.0 130
SOUTH BRUSH CREEK 8400 -M 8.7 * 16.2 12.3 132
TOWER 10500 35.7 35.3 101 32.9 28.3 116
WEBBER SPRINGS 9200 15.6 21.0 74 21.4 19.5 110
WILLOW CREEK PASS 9540 9.8 8.7 113 9.9 9.3 106
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Basin wide percent of average 98 118
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 17.4 18.8 93 18.5 14.5 128
CASPER MTN. 7900 9.2 11.4 81 14.1 10.2 138
DEADMAN HILL 10220 -M 12.9 * 14.8 12.2 121
DEER PARK 9700 14.8 -M * 19.3 -M *
LAPRELE CREEK 8320 -M 7.9 * 12.3 8.7 141
RENO HILL 8400 11.1 10.1 110 15.5 13.7 113
ROACH 9700 14.2 13.1 108 16.7 16.4 102
SAND LAKE 10080 27.0 25.3 107 23.6 15.5 152
SOUTH PASS 9040 15.7 13.3 118 16.8 12.9 130
WINDY PEAK 7840 5.1 5.7 89 10.9 6.8 160
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Basin wide percent of average 102 129
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.1 9.1 133 15.3 12.1 126
DIVIDE PEAK 8800 16.0 15.8 101 20.7 18.0 115
OLD BATTLE 10000 23.3 24.6 95 29.8 23.0 130
SANDSTONE RS 8150 11.2 11.4 98 17.8 14.8 120
WHISKEY PARK 8950 21.7 22.1 98 22.9 21.8 105
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Basin wide percent of average 102 119
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.8 11.3 122 12.8 13.8 93
BLIND BULL SUM 8650 24.7 22.9 108 19.6 19.8 99
EAST RIM DIVIDE 7930 11.9 11.2 106 12.3 12.9 95
ELKHART PARK G.S. 9400 11.8 10.8 109 12.3 13.6 90
GROS VENTRE SUMMIT 8775 13.2 12.2 108 13.0 13.5 96
KENDALL R.S. 7740 13.6 11.8 115 13.0 13.2 98
LOOMIS PARK 8240 -M 14.0 * 17.3 15.9 109
NEW FORK LAKE 8340 10.8 9.3 116 10.6 12.2 87
SNIDER BASIN 8250 14.0 11.9 118 13.9 12.9 108
SPRING CREEK DIVIDE 9000 23.9 21.8 110 23.7 22.8 104
TRIPLE PEAK 8500 22.5 20.6 109 24.0 26.4 91
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Basin wide percent of average 111 97
LOWER GREEN RIVER
HAMS FORK 7840 11.1 9.9 112 9.6 11.3 85
HEWINTA 9500 8.8 7.8 113 11.5 9.7 119
HICKERSON PARK 9150 5.6 4.6 122 8.0 6.9 116
HOLE-IN-ROCK 9150 5.7 4.2 136 8.5 6.9 123
INDIAN CREEK 9425 24.3 21.6 112 20.1 21.3 94
KELLEY R.S. 8180 14.3 13.3 108 15.9 15.9 100
STEEL CREEK PARK 10100 11.4 11.6 98 13.2 9.8 135
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Basin wide percent of average 111 106
UPPER BEAR RIVER
BUG LAKE 7950 17.6 15.7 112 16.3 15.0 109
HAYDEN FORK 9400 12.1 12.7 95 15.9 14.3 111
KELLEY R.S. 8180 14.3 13.3 108 15.9 15.9 100
LILY LAKE 9050 10.9 10.0 109 14.7 11.1 132
MONTE CRISTO 8960 21.7 21.4 101 21.8 19.6 111
SALT RIVER SUMMIT 7600 13.6 11.2 121 15.6 14.3 109
TRIAL LAKE 9960 16.7 19.5 86 17.6 18.4 96
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Basin wide percent of average 103 108
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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.