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: MAY 12 , 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 14.2 6.1 233 30.2 26.2 115
COTTONWOOD CREEK 7600 23.2 15.4 152 35.3 29.4 121
GRANITE CREEK 6770 14.4 8.6 167 27.2 27.9 98
GRASSY LAKE 7265 39.3 28.7 137 48.2 43.5 111
GROS VENTRE SUMMIT 8775 16.4 11.0 149 19.4 18.9 103
LEWIS LAKE DIVIDE 7860 38.0 30.7 124 44.8 44.3 102
PHILLIPS BENCH 8200 33.9 26.4 129 36.8 34.9 106
SALT RIVER SUMMIT 7600 12.0 2.4 501 22.2 20.0 111
SNAKE RIVER STATION 6920 11.6 12.6 93 29.4 30.5 97
SPRING CREEK DIVIDE 9000 37.4 26.9 140 35.3 31.9 111
THUMB DIVIDE 7980 17.0 12.1 141 25.9 24.5 106
TOGWOTEE PASS 9580 -M 26.5 * 34.3 33.3 104
TWO OCEAN PLATEAU 9360 41.3 26.7 156 35.9 36.2 100
WILLOW CREEK 8450 31.4 28.7 110 47.0 37.7 125
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Basin wide percent of average 140 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 25.2 116 27.5 22.7 122
BLACK BEAR 7950 55.4 37.8 147 53.0 48.0 111
CANYON 7940 12.5 7.5 167 21.4 17.4 124
FISHER CREEK 9100 41.3 37.8 110 42.3 44.0 97
MADISON PLATEAU 7750 -M 20.0 * 36.9 31.2 119
NORTHEAST ENTRANCE 7350 2.4 3.4 71 16.7 15.0 113
PARKER PEAK 9400 26.4 23.0 115 -M 19.4 *
SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136
THUMB DIVIDE 7980 17.0 12.1 141 25.9 24.5 106
TWO OCEAN PLATEAU 9360 41.3 26.7 156 35.9 36.2 100
WHISKEY CREEK 6800 18.4 10.9 171 28.5 25.9 111
WHITE MILL 8700 30.7 25.2 122 28.9 34.2 85
WOLVERINE 7650 2.3 4.1 54 15.5 16.4 95
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Basin wide percent of average 129 108
WIND RIVER
BURROUGHS CREEK 8750 18.4 8.2 225 22.2 20.5 109
COLD SPRINGS 9630 18.7 3.8 506 23.9 14.2 169
DEER PARK 9700 25.9 -M * 32.7 -M *
HOBBS PARK 10100 30.2 17.2 176 27.9 18.7 150
LITTLE WARM 9620 20.4 6.5 313 24.2 17.4 140
SOUTH PASS 9040 24.4 16.9 144 30.2 21.9 138
ST. LAWRENCE ALT 8620 13.0 3.2 420 21.2 13.5 158
TOGWOTEE PASS 9580 -M 26.5 * 34.3 33.3 104
TOWNSEND CREEK 8700 18.9 7.0 273 25.9 16.7 155
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Basin wide percent of average 230 135
BIGHORN BASIN
BALD MTN. 9375 25.0 24.4 103 24.5 22.4 110
BEAR TRAP MEADOW 7900 1.4 2.2 67 -M 11.9 *
BLACKWATER 9780 35.5 25.0 143 29.4 21.9 134
BONE SPRINGS DIV 9350 22.0 17.0 130 23.9 19.7 122
EVENING STAR 9200 36.9 30.5 121 40.0 27.4 146
GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.9 132
KIRWIN 9550 17.4 10.5 166 20.5 14.5 143
MARQUETTE 8760 17.4 8.0 219 19.7 15.0 133
MIDDLE POWDER 7760 17.7 14.2 124 23.2 16.2 144
OWL CREEK 8975 11.1 1.7 694 14.5 9.1 159
POWDER RIVER PASS 9480 12.2 7.3 170 21.5 16.0 135
SHELL CREEK 9580 19.4 17.0 115 20.4 17.4 118
SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136
SYLVAN ROAD 8120 7.6 5.0 156 21.9 19.9 111
TIMBER CREEK 7950 10.9 3.3 328 16.9 11.5 148
YOUNTS PEAK 8350 21.4 16.4 130 21.7 20.4 107
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Basin wide percent of average 136 130
SHOSHONE RIVER
BLACKWATER 9780 35.5 25.0 143 29.4 21.9 134
EVENING STAR 9200 36.9 30.5 121 40.0 27.4 146
KIRWIN 9550 17.4 10.5 166 20.5 14.5 143
MARQUETTE 8760 17.4 8.0 219 19.7 15.0 133
SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136
SYLVAN ROAD 8120 7.6 5.0 156 21.9 19.9 111
YOUNTS PEAK 8350 21.4 16.4 130 21.7 20.4 107
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Basin wide percent of average 138 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.4 2.2 67 -M 11.9 *
BIG GOOSE 7990 9.9 -M * 18.4 -M *
BONE SPRINGS DIV 9350 22.0 17.0 130 23.9 19.7 122
BURGESS JUNCTION 7880 12.0 11.7 102 17.7 15.6 113
CLOUD PEAK RESERVOIR 9860 24.7 16.5 150 24.9 18.7 134
DOME LAKE 8880 -M 11.5 * 17.7 17.9 100
GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.9 132
HANSEN SAWMILL 8760 4.8 4.8 100 17.2 11.4 153
MIDDLE POWDER 7760 17.7 14.2 124 23.2 16.2 144
POWDER RIVER PASS 9480 12.2 7.3 170 21.5 16.0 135
SUCKER CREEK 8880 14.9 11.4 131 21.4 18.0 119
TIE CREEK 6870 -M -M * -M 15.0 *
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Basin wide percent of average 126 127
BELLE FOURCHE
BLIND PARK 6890 .3 5.8 6 19.2 15.5 125
NORTH RAPID CREEK 6130 .0 -M * 17.2 -M *
WARREN PEAK 6520 1.9 5.8 34 -M 11.5 *
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Basin wide percent of average 20 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.5 16.0 98 29.2 29.2 100
DIVIDE PEAK 8800 19.9 14.0 142 31.7 28.7 111
ELK RIVER 8700 12.0 10.2 117 28.4 23.0 124
JOE WRIGHT 10120 23.5 24.0 98 33.3 32.0 104
NORTH FRENCH CREEK 10100 40.7 27.4 149 40.2 29.7 136
OLD BATTLE 10000 39.9 37.3 108 46.9 37.2 127
SOUTH BRUSH CREEK 8400 9.9 7.0 141 25.7 21.7 119
TOWER 10500 57.4 50.9 113 49.5 45.5 109
WEBBER SPRINGS 9200 21.2 21.7 98 33.9 31.9 107
WILLOW CREEK PASS 9540 15.6 11.5 137 16.0 16.5 97
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Basin wide percent of average 117 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.7 25.9 111 32.0 25.0 129
CASPER MTN. 7900 12.9 12.7 101 23.4 20.4 115
DEADMAN HILL 10220 21.7 18.9 115 24.0 22.4 108
DEER PARK 9700 25.9 -M * 32.7 -M *
LAPRELE CREEK 8320 .2 4.1 3 20.7 16.0 130
RENO HILL 8400 14.7 9.7 152 26.7 23.2 116
ROACH 9700 -M 16.5 * 26.2 27.4 96
SAND LAKE 10080 46.3 35.8 130 37.8 26.2 145
SOUTH PASS 9040 24.4 16.9 144 30.2 21.9 138
WINDY PEAK 7840 1.4 4.5 29 18.2 13.5 135
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Basin wide percent of average 117 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 1.2 0* 23.2 19.4 120
DIVIDE PEAK 8800 19.9 14.0 142 31.7 28.7 111
OLD BATTLE 10000 39.9 37.3 108 46.9 37.2 127
SANDSTONE RS 8150 3.8 4.0 95 26.2 24.2 109
WHISKEY PARK 8950 30.7 26.4 117 37.9 35.7 107
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Basin wide percent of average 115 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.5 10.7 136 18.9 19.4 98
BLIND BULL SUM 8650 32.3 22.5 144 27.4 27.9 99
EAST RIM DIVIDE 7930 14.6 13.2 111 17.9 18.0 99
ELKHART PARK G.S. 9400 15.7 10.9 146 19.2 19.0 102
GROS VENTRE SUMMIT 8775 16.4 11.0 149 19.4 18.9 103
KENDALL R.S. 7740 10.0 2.3 431 19.9 18.4 108
LOOMIS PARK 8240 -M 12.2 * 24.5 22.4 110
NEW FORK LAKE 8340 11.0 7.0 160 16.2 17.2 95
SNIDER BASIN 8250 18.2 9.5 191 22.7 18.0 126
SPRING CREEK DIVIDE 9000 37.4 26.9 140 35.3 31.9 111
TRIPLE PEAK 8500 31.0 22.2 141 37.9 36.4 105
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Basin wide percent of average 148 105
LOWER GREEN RIVER
HAMS FORK 7840 7.3 1.4 562* 18.2 16.0 114
HEWINTA 9500 12.5 1.2 1042* 19.2 17.4 111
HICKERSON PARK 9150 4.8 1.2 437 14.5 13.5 108
HOLE-IN-ROCK 9150 8.4 .0 923 14.9 13.5 111
INDIAN CREEK 9425 38.3 25.9 149 34.0 30.4 112
KELLEY R.S. 8180 15.5 11.1 139 23.9 22.2 108
STEEL CREEK PARK 10100 21.9 17.2 129 23.0 17.5 132
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Basin wide percent of average 186 114
UPPER BEAR RIVER
BUG LAKE 7950 24.9 11.5 218 28.7 23.5 123
HAYDEN FORK 9400 14.6 2.0 730 27.9 24.2 115
KELLEY R.S. 8180 15.5 11.1 139 23.9 22.2 108
LILY LAKE 9050 12.5 6.5 194 24.2 19.2 126
MONTE CRISTO 8960 38.8 22.9 170 36.8 31.7 117
SALT RIVER SUMMIT 7600 12.0 2.4 501 22.2 20.0 111
TRIAL LAKE 9960 28.0 21.7 130 30.4 29.7 103
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Basin wide percent of average 188 114
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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.