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: MAY 16 , 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 12.5 4.6 272 30.4 26.7 115
COTTONWOOD CREEK 7600 24.0 13.2 182 36.5 29.7 123
GRANITE CREEK 6770 13.4 7.0 191 27.7 28.4 98
GRASSY LAKE 7265 39.3 26.4 149 49.3 44.2 112
GROS VENTRE SUMMIT 8775 16.4 9.6 171 20.2 19.2 106
LEWIS LAKE DIVIDE 7860 38.9 29.2 134 45.4 44.8 102
PHILLIPS BENCH 8200 33.5 24.9 135 37.2 35.3 106
SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 113
SNAKE RIVER STATION 6920 10.5 11.0 97 29.9 31.0 97
SPRING CREEK DIVIDE 9000 38.3 25.7 150 36.3 32.3 113
THUMB DIVIDE 7980 18.2 10.6 172 27.7 24.9 111
TOGWOTEE PASS 9580 -M 25.9 * 35.3 33.7 106
TWO OCEAN PLATEAU 9360 42.5 26.2 163 36.4 36.5 100
WILLOW CREEK 8450 33.2 27.4 122 48.9 38.2 129
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Basin wide percent of average 149 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 24.7 119 27.9 23.2 121
BLACK BEAR 7950 57.9 36.5 159 54.9 48.5 114
CANYON 7940 13.4 6.3 212 22.5 17.7 128
FISHER CREEK 9100 42.9 37.2 116 43.7 44.7 98
MADISON PLATEAU 7750 -M 18.4 * 38.9 31.7 124
NORTHEAST ENTRANCE 7350 2.5 2.5 100 17.7 15.2 116
PARKER PEAK 9400 27.7 22.5 123 -M 19.9 *
SYLVAN LAKE 8420 24.9 20.4 123 33.3 24.4 138
THUMB DIVIDE 7980 18.2 10.6 172 27.7 24.9 111
TWO OCEAN PLATEAU 9360 42.5 26.2 163 36.4 36.5 100
WHISKEY CREEK 6800 19.0 9.1 209 30.0 26.4 115
WHITE MILL 8700 31.4 24.7 128 29.9 34.7 87
WOLVERINE 7650 .9 2.9 28 15.5 16.7 93
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Basin wide percent of average 139 110
WIND RIVER
BURROUGHS CREEK 8750 18.5 6.8 277 23.0 21.0 110
COLD SPRINGS 9630 18.5 2.8 686 24.5 14.6 168
DEER PARK 9700 26.9 -M * 33.8 -M *
HOBBS PARK 10100 30.5 16.5 185 28.5 19.2 150
LITTLE WARM 9620 20.2 5.3 389 25.0 17.9 141
SOUTH PASS 9040 24.9 16.2 154 30.9 22.4 139
ST. LAWRENCE ALT 8620 12.2 2.3 531 21.4 13.7 157
TOGWOTEE PASS 9580 -M 25.9 * 35.3 33.7 106
TOWNSEND CREEK 8700 18.0 6.0 306 26.0 17.2 153
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Basin wide percent of average 258 135
BIGHORN BASIN
BALD MTN. 9375 26.4 24.2 110 25.9 23.0 113
BEAR TRAP MEADOW 7900 1.0 1.4 72 16.9 12.2 139
BLACKWATER 9780 36.8 24.5 150 30.4 22.4 137
BONE SPRINGS DIV 9350 23.7 16.2 146 25.4 20.2 127
EVENING STAR 9200 36.9 30.2 123 40.7 27.9 146
GRAVE SPRINGS 8550 11.1 10.5 106 18.5 14.4 130
KIRWIN 9550 17.9 10.0 180 21.2 14.9 143
MARQUETTE 8760 18.4 7.5 248 20.9 15.5 136
MIDDLE POWDER 7760 17.4 13.5 130 23.2 16.5 141
OWL CREEK 8975 10.7 1.0 1070 14.9 9.5 158
POWDER RIVER PASS 9480 13.0 6.0 217 22.4 16.4 137
SHELL CREEK 9580 20.4 16.7 123 21.4 17.9 120
SYLVAN LAKE 8420 24.9 20.4 123 33.3 24.4 138
SYLVAN ROAD 8120 7.0 3.9 177 22.5 20.2 112
TIMBER CREEK 7950 10.7 2.4 446 17.5 12.0 148
YOUNTS PEAK 8350 21.0 15.5 136 22.4 20.9 108
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Basin wide percent of average 146 132
SHOSHONE RIVER
BLACKWATER 9780 36.8 24.5 150 30.4 22.4 137
EVENING STAR 9200 36.9 30.2 123 40.7 27.9 146
KIRWIN 9550 17.9 10.0 180 21.2 14.9 143
MARQUETTE 8760 18.4 7.5 248 20.9 15.5 136
SYLVAN LAKE 8420 24.9 20.4 123 33.3 24.4 138
SYLVAN ROAD 8120 7.0 3.9 177 22.5 20.2 112
YOUNTS PEAK 8350 21.0 15.5 136 22.4 20.9 108
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Basin wide percent of average 146 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.0 1.4 72 16.9 12.2 139
BIG GOOSE 7990 10.4 -M * 19.2 -M *
BONE SPRINGS DIV 9350 23.7 16.2 146 25.4 20.2 127
BURGESS JUNCTION 7880 12.4 10.6 117 18.5 16.0 116
CLOUD PEAK RESERVOIR 9860 24.9 15.7 159 25.4 19.2 133
DOME LAKE 8880 -M 10.0 * 18.5 18.4 102
GRAVE SPRINGS 8550 11.1 10.5 106 18.5 14.4 130
HANSEN SAWMILL 8760 3.8 3.9 98 17.5 11.7 150
MIDDLE POWDER 7760 17.4 13.5 130 23.2 16.5 141
POWDER RIVER PASS 9480 13.0 6.0 217 22.4 16.4 137
SUCKER CREEK 8880 16.2 10.2 158 23.0 18.5 125
TIE CREEK 6870 4.3 -M * 19.2 15.5 125
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Basin wide percent of average 141 128
BELLE FOURCHE
BLIND PARK 6890 .5 4.5 10 20.2 16.0 127
NORTH RAPID CREEK 6130 .0 -M * 17.7 -M *
WARREN PEAK 6520 .0 4.5 21 -M 11.9 *
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Basin wide percent of average 15 127*
UPPER N. PLATTE RIVER
COLUMBINE 9400 13.1 13.5 98 29.9 29.5 102
DIVIDE PEAK 8800 20.4 12.0 170 32.8 29.0 113
ELK RIVER 8700 10.7 8.1 133 29.5 23.4 127
JOE WRIGHT 10120 23.9 23.4 103 33.9 32.7 104
NORTH FRENCH CREEK 10100 41.3 26.4 157 39.9 30.2 133
OLD BATTLE 10000 41.2 36.3 114 48.3 37.7 129
SOUTH BRUSH CREEK 8400 10.0 5.8 176 26.7 22.0 122
TOWER 10500 -M 50.5 * -M 46.3 *
WEBBER SPRINGS 9200 20.7 20.0 104 34.8 32.3 108
WILLOW CREEK PASS 9540 15.1 10.4 147 16.7 16.9 99
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Basin wide percent of average 127 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.2 24.2 117 32.8 25.4 130
CASPER MTN. 7900 11.9 10.9 110 23.9 20.9 115
DEADMAN HILL 10220 21.4 18.2 118 24.4 22.9 108
DEER PARK 9700 26.9 -M * 33.8 -M *
LAPRELE CREEK 8320 .0 3.3 0 21.2 16.4 129
RENO HILL 8400 13.2 8.4 160 27.0 23.4 116
ROACH 9700 -M 15.5 * 26.4 28.0 95
SAND LAKE 10080 46.3 34.8 133 38.8 26.7 146
SOUTH PASS 9040 24.9 16.2 154 30.9 22.4 139
WINDY PEAK 7840 .0 3.3 0 18.7 14.0 135
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Basin wide percent of average 123 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100* 23.9 19.7 122
DIVIDE PEAK 8800 20.4 12.0 170 32.8 29.0 113
OLD BATTLE 10000 41.2 36.3 114 48.3 37.7 129
SANDSTONE RS 8150 3.0 2.3 137 27.0 24.5 111
WHISKEY PARK 8950 32.0 24.7 131 39.3 36.2 109
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Basin wide percent of average 129 117
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.0 9.4 161 19.7 19.7 100
BLIND BULL SUM 8650 33.5 22.2 152 28.5 28.2 102
EAST RIM DIVIDE 7930 14.6 12.5 118 18.4 18.4 100
ELKHART PARK G.S. 9400 16.2 9.5 170 19.7 19.2 103
GROS VENTRE SUMMIT 8775 16.4 9.6 171 20.2 19.2 106
KENDALL R.S. 7740 9.0 .0 * 20.4 18.7 110
LOOMIS PARK 8240 -M 10.7 * 25.2 22.7 112
NEW FORK LAKE 8340 10.5 6.0 178 16.4 17.4 94
SNIDER BASIN 8250 17.0 8.0 213 23.2 18.2 127
SPRING CREEK DIVIDE 9000 38.3 25.7 150 36.3 32.3 113
TRIPLE PEAK 8500 30.9 20.9 148 39.2 36.9 106
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Basin wide percent of average 156 107
LOWER GREEN RIVER
HAMS FORK 7840 5.5 .0 * 18.4 16.2 115
HEWINTA 9500 13.2 .0 * 20.4 17.7 116
HICKERSON PARK 9150 4.5 .6 751* 15.4 13.9 111
HOLE-IN-ROCK 9150 8.0 .5 1581* 16.0 13.9 116
INDIAN CREEK 9425 38.8 24.5 158 34.7 30.7 113
KELLEY R.S. 8180 15.1 9.5 159 24.7 22.7 109
STEEL CREEK PARK 10100 23.2 16.4 142 24.5 17.9 137
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Basin wide percent of average 174* 116
UPPER BEAR RIVER
BUG LAKE 7950 24.0 9.7 248 29.5 23.9 124
HAYDEN FORK 9400 14.6 .7 2086* 28.9 24.7 118
KELLEY R.S. 8180 15.1 9.5 159 24.7 22.7 109
LILY LAKE 9050 13.5 5.5 246 25.5 19.7 131
MONTE CRISTO 8960 40.3 21.2 190 38.3 32.0 120
SALT RIVER SUMMIT 7600 11.9 .0 * 22.9 20.4 113
TRIAL LAKE 9960 28.9 20.5 141 31.7 30.0 106
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Basin wide percent of average 203 117
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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.