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 FRIDAY: MAY 14 , 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 13.0 5.3 244 30.2 26.4 115
COTTONWOOD CREEK 7600 23.9 14.5 165 36.3 29.5 123
GRANITE CREEK 6770 13.9 7.8 177 27.5 28.2 98
GRASSY LAKE 7265 38.8 27.7 141 48.7 43.8 111
GROS VENTRE SUMMIT 8775 16.4 10.5 157 19.7 19.0 104
LEWIS LAKE DIVIDE 7860 38.4 30.0 129 45.2 44.5 102
PHILLIPS BENCH 8200 34.0 25.7 133 36.8 35.2 105
SALT RIVER SUMMIT 7600 12.0 .9 1488* 22.4 20.2 111
SNAKE RIVER STATION 6920 10.9 12.0 91 29.7 30.7 97
SPRING CREEK DIVIDE 9000 37.8 26.4 144 35.8 32.2 112
THUMB DIVIDE 7980 17.4 11.5 151 26.5 24.7 108
TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.4 104
TWO OCEAN PLATEAU 9360 41.8 26.4 159 36.2 36.3 100
WILLOW CREEK 8450 32.9 28.2 118 48.3 37.8 128
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Basin wide percent of average 147 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.0 25.0 117 27.9 22.9 122
BLACK BEAR 7950 57.3 37.3 154 54.4 48.3 113
CANYON 7940 13.1 7.0 190 22.4 17.4 129
FISHER CREEK 9100 42.7 37.5 114 43.3 44.3 98
MADISON PLATEAU 7750 -M 19.4 * 38.8 31.4 124
NORTHEAST ENTRANCE 7350 -M 2.9 * 17.7 15.0 118
PARKER PEAK 9400 27.2 22.9 119 -M 19.7 *
SYLVAN LAKE 8420 24.4 20.9 117 32.8 24.0 137
THUMB DIVIDE 7980 17.4 11.5 151 26.5 24.7 108
TWO OCEAN PLATEAU 9360 41.8 26.4 159 36.2 36.3 100
WHISKEY CREEK 6800 -M 10.0 * -M 26.2 *
WHITE MILL 8700 31.4 25.0 126 29.7 34.3 87
WOLVERINE 7650 1.2 3.4 36 15.5 16.5 94
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Basin wide percent of average 132 110
WIND RIVER
BURROUGHS CREEK 8750 -M 7.5 * -M 20.7 *
COLD SPRINGS 9630 18.2 3.2 584 24.0 14.5 167
DEER PARK 9700 26.7 -M * 33.4 -M *
HOBBS PARK 10100 30.4 17.0 179 28.2 18.9 149
LITTLE WARM 9620 20.2 5.8 349 24.5 17.7 140
SOUTH PASS 9040 24.7 16.7 148 30.5 22.2 139
ST. LAWRENCE ALT 8620 12.4 2.8 456 21.4 13.5 158
TOGWOTEE PASS 9580 -M 26.2 * 34.5 33.4 104
TOWNSEND CREEK 8700 18.4 6.5 286 26.0 16.9 154
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Basin wide percent of average 240 139
BIGHORN BASIN
BALD MTN. 9375 25.5 24.4 105 24.9 22.7 110
BEAR TRAP MEADOW 7900 .0 1.7 53 16.5 12.0 138
BLACKWATER 9780 35.7 24.9 143 29.7 22.2 134
BONE SPRINGS DIV 9350 22.2 16.9 133 24.2 19.9 122
EVENING STAR 9200 36.9 30.4 122 40.3 27.7 147
GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.0 132
KIRWIN 9550 17.4 10.4 169 20.7 14.6 142
MARQUETTE 8760 17.4 7.8 225 19.9 15.1 132
MIDDLE POWDER 7760 17.2 14.1 122 23.0 16.4 142
OWL CREEK 8975 10.5 1.2 876 14.5 9.2 158
POWDER RIVER PASS 9480 12.5 6.6 190 21.9 16.2 136
SHELL CREEK 9580 19.7 17.0 116 20.7 17.7 118
SYLVAN LAKE 8420 24.4 20.9 117 32.8 24.0 137
SYLVAN ROAD 8120 7.1 4.3 166 22.2 20.0 111
TIMBER CREEK 7950 10.5 2.8 376 16.9 11.6 146
YOUNTS PEAK 8350 20.9 16.0 131 21.9 20.7 106
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Basin wide percent of average 138 130
SHOSHONE RIVER
BLACKWATER 9780 35.7 24.9 143 29.7 22.2 134
EVENING STAR 9200 36.9 30.4 122 40.3 27.7 147
KIRWIN 9550 17.4 10.4 169 20.7 14.6 142
MARQUETTE 8760 17.4 7.8 225 19.9 15.1 132
SYLVAN LAKE 8420 24.4 20.9 117 32.8 24.0 137
SYLVAN ROAD 8120 7.1 4.3 166 22.2 20.0 111
YOUNTS PEAK 8350 20.9 16.0 131 21.9 20.7 106
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Basin wide percent of average 140 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 1.7 53 16.5 12.0 138
BIG GOOSE 7990 9.6 -M * 18.5 -M *
BONE SPRINGS DIV 9350 22.2 16.9 133 24.2 19.9 122
BURGESS JUNCTION 7880 11.5 11.4 102 17.7 15.9 113
CLOUD PEAK RESERVOIR 9860 24.7 16.4 152 25.2 18.9 133
DOME LAKE 8880 -M 10.7 * 17.9 18.0 100
GRAVE SPRINGS 8550 11.1 11.1 100 18.4 14.0 132
HANSEN SAWMILL 8760 3.8 4.3 87 17.2 11.5 150
MIDDLE POWDER 7760 17.2 14.1 122 23.0 16.4 142
POWDER RIVER PASS 9480 12.5 6.6 190 21.9 16.2 136
SUCKER CREEK 8880 14.9 10.9 138 21.7 18.2 119
TIE CREEK 6870 -M -M * -M 15.2 *
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Basin wide percent of average 128 127
BELLE FOURCHE
BLIND PARK 6890 .3 5.0 6 19.7 15.7 126
NORTH RAPID CREEK 6130 .0 -M * 17.4 -M *
WARREN PEAK 6520 1.2 5.0 24 -M 11.6 *
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Basin wide percent of average 16 126*
UPPER N. PLATTE RIVER
COLUMBINE 9400 14.0 14.7 96 29.7 29.4 102
DIVIDE PEAK 8800 20.4 13.0 157 32.7 28.9 114
ELK RIVER 8700 11.0 9.1 121 28.7 23.2 124
JOE WRIGHT 10120 23.4 23.9 99 33.3 32.3 104
NORTH FRENCH CREEK 10100 40.9 26.9 153 40.2 29.9 135
OLD BATTLE 10000 40.8 37.0 111 47.7 37.4 128
SOUTH BRUSH CREEK 8400 10.1 6.3 161 26.2 21.9 120
TOWER 10500 57.5 50.9 113 49.8 45.9 109
WEBBER SPRINGS 9200 20.7 20.9 100 34.4 32.0 108
WILLOW CREEK PASS 9540 15.0 11.0 137 16.4 16.7 99
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Basin wide percent of average 119 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.4 25.2 113 32.3 25.2 129
CASPER MTN. 7900 12.4 11.7 106 23.7 20.7 115
DEADMAN HILL 10220 21.9 18.7 117 24.2 22.7 108
DEER PARK 9700 26.7 -M * 33.4 -M *
LAPRELE CREEK 8320 .0 3.8 0 20.9 16.2 129
RENO HILL 8400 13.7 9.0 153 26.7 23.2 116
ROACH 9700 -M 16.2 * 26.2 27.7 95
SAND LAKE 10080 46.3 35.7 130 38.2 26.4 145
SOUTH PASS 9040 24.7 16.7 148 30.5 22.2 139
WINDY PEAK 7840 .5 3.9 11 18.5 13.7 136
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Basin wide percent of average 119 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .5 0* 23.4 19.7 120
DIVIDE PEAK 8800 20.4 13.0 157 32.7 28.9 114
OLD BATTLE 10000 40.8 37.0 111 47.7 37.4 128
SANDSTONE RS 8150 3.7 2.9 125 26.7 24.4 110
WHISKEY PARK 8950 31.4 25.7 122 38.7 35.9 108
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Basin wide percent of average 122 116
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.7 10.1 146 19.4 19.4 100
BLIND BULL SUM 8650 33.2 22.5 148 28.0 28.0 100
EAST RIM DIVIDE 7930 14.5 13.0 113 18.0 18.2 100
ELKHART PARK G.S. 9400 15.9 10.2 155 19.4 19.2 102
GROS VENTRE SUMMIT 8775 16.4 10.5 157 19.7 19.0 104
KENDALL R.S. 7740 9.2 .9 1150* 20.0 18.5 109
LOOMIS PARK 8240 -M 11.6 * 24.9 22.5 111
NEW FORK LAKE 8340 10.7 6.5 165 16.2 17.2 95
SNIDER BASIN 8250 17.4 9.0 195 22.9 18.2 127
SPRING CREEK DIVIDE 9000 37.8 26.4 144 35.8 32.2 112
TRIPLE PEAK 8500 30.7 21.5 143 38.4 36.7 105
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Basin wide percent of average 154 106
LOWER GREEN RIVER
HAMS FORK 7840 6.3 .5 1241* 18.4 16.0 115
HEWINTA 9500 12.5 .5 3125* 19.9 17.5 114
HICKERSON PARK 9150 4.0 .9 500 14.9 13.6 109
HOLE-IN-ROCK 9150 7.6 .7 1086* 15.5 13.6 114
INDIAN CREEK 9425 38.8 25.2 154 34.3 30.5 113
KELLEY R.S. 8180 15.2 10.5 147 24.4 22.4 109
STEEL CREEK PARK 10100 22.7 16.9 136 24.0 17.7 136
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Basin wide percent of average 196 116
UPPER BEAR RIVER
BUG LAKE 7950 24.4 10.6 230 29.2 23.7 124
HAYDEN FORK 9400 14.0 1.2 1167* 28.9 24.4 119
KELLEY R.S. 8180 15.2 10.5 147 24.4 22.4 109
LILY LAKE 9050 13.1 6.0 219 25.0 19.4 129
MONTE CRISTO 8960 39.9 22.4 179 37.9 31.9 120
SALT RIVER SUMMIT 7600 12.0 .9 1488* 22.4 20.2 111
TRIAL LAKE 9960 28.9 21.4 136 31.4 29.9 106
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Basin wide percent of average 203 116
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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.