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: MAY 8 , 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 14.0 7.8 179 29.9 25.9 116
COTTONWOOD CREEK 7600 22.9 17.2 134 34.2 28.9 118
GRANITE CREEK 6770 14.7 10.2 145 26.9 27.5 98
GRASSY LAKE 7265 40.3 30.7 132 48.2 42.9 113
GROS VENTRE SUMMIT 8775 16.0 12.1 132 18.7 18.7 101
LEWIS LAKE DIVIDE 7860 39.0 32.2 122 44.7 43.8 103
PHILLIPS BENCH 8200 35.3 27.5 129 36.5 34.4 107
SALT RIVER SUMMIT 7600 12.4 5.5 224 21.7 19.7 111
SNAKE RIVER STATION 6920 12.5 14.0 90 29.4 30.2 98
SPRING CREEK DIVIDE 9000 37.3 27.9 134 34.7 31.5 110
THUMB DIVIDE 7980 18.2 13.2 138 25.7 24.2 107
TOGWOTEE PASS 9580 -M 27.2 * 33.4 32.8 103
TWO OCEAN PLATEAU 9360 40.5 27.0 150 35.7 35.7 100
WILLOW CREEK 8450 32.0 29.9 108 45.8 37.2 124
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Basin wide percent of average 132 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.7 25.5 113 27.7 22.2 125
BLACK BEAR 7950 54.8 38.5 143 52.8 47.5 111
CANYON 7940 13.5 8.9 153 21.2 16.9 126
FISHER CREEK 9100 40.5 38.2 107 42.2 43.3 98
MADISON PLATEAU 7750 -M 21.4 * 36.8 30.7 120
NORTHEAST ENTRANCE 7350 3.5 4.3 82 16.7 14.5 116
PARKER PEAK 9400 26.2 23.4 113 -M 19.0 *
SYLVAN LAKE 8420 23.7 22.4 107 31.9 23.4 137
THUMB DIVIDE 7980 18.2 13.2 138 25.7 24.2 107
TWO OCEAN PLATEAU 9360 40.5 27.0 150 35.7 35.7 100
WHISKEY CREEK 6800 19.5 12.5 158 28.4 25.7 111
WHITE MILL 8700 30.5 25.7 119 28.9 33.7 86
WOLVERINE 7650 4.0 5.6 72 15.2 16.0 96
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Basin wide percent of average 124 109
WIND RIVER
BURROUGHS CREEK 8750 17.9 10.0 179 21.5 20.2 107
COLD SPRINGS 9630 18.2 5.0 372 23.4 13.9 169
DEER PARK 9700 25.7 -M * 32.3 -M *
HOBBS PARK 10100 29.5 17.5 169 27.2 18.2 150
LITTLE WARM 9620 19.4 8.0 242 23.2 17.0 137
SOUTH PASS 9040 24.4 17.4 141 29.9 21.4 140
ST. LAWRENCE ALT 8620 13.5 4.0 338 20.9 13.1 160
TOGWOTEE PASS 9580 -M 27.2 * 33.4 32.8 103
TOWNSEND CREEK 8700 19.4 7.8 248 25.7 16.4 158
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Basin wide percent of average 205 135
BIGHORN BASIN
BALD MTN. 9375 22.9 24.4 94 22.7 21.9 104
BEAR TRAP MEADOW 7900 .9 2.9 28 14.9 11.5 130
BLACKWATER 9780 35.2 25.4 139 29.2 21.4 136
BONE SPRINGS DIV 9350 20.4 17.7 116 22.2 19.2 116
EVENING STAR 9200 35.3 30.7 116 39.8 26.9 148
GRAVE SPRINGS 8550 11.4 11.5 100 17.4 13.4 131
KIRWIN 9550 16.4 11.0 149 19.4 14.0 138
MARQUETTE 8760 16.9 8.2 205 19.4 14.5 135
MIDDLE POWDER 7760 16.9 14.5 116 23.2 15.6 149
OWL CREEK 8975 10.0 2.3 431 13.0 8.7 150
POWDER RIVER PASS 9480 11.7 8.5 140 20.2 15.5 130
SHELL CREEK 9580 17.9 17.0 106 19.0 16.9 114
SYLVAN LAKE 8420 23.7 22.4 107 31.9 23.4 137
SYLVAN ROAD 8120 8.6 6.0 144 21.7 19.4 112
TIMBER CREEK 7950 9.7 4.3 226 16.0 11.0 146
YOUNTS PEAK 8350 21.0 17.2 123 21.4 20.0 107
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Basin wide percent of average 125 129
SHOSHONE RIVER
BLACKWATER 9780 35.2 25.4 139 29.2 21.4 136
EVENING STAR 9200 35.3 30.7 116 39.8 26.9 148
KIRWIN 9550 16.4 11.0 149 19.4 14.0 138
MARQUETTE 8760 16.9 8.2 205 19.4 14.5 135
SYLVAN LAKE 8420 23.7 22.4 107 31.9 23.4 137
SYLVAN ROAD 8120 8.6 6.0 144 21.7 19.4 112
YOUNTS PEAK 8350 21.0 17.2 123 21.4 20.0 107
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Basin wide percent of average 131 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 2.9 28 14.9 11.5 130
BIG GOOSE 7990 9.5 -M * 17.7 -M *
BONE SPRINGS DIV 9350 20.4 17.7 116 22.2 19.2 116
BURGESS JUNCTION 7880 10.5 12.5 85 16.2 15.2 106
CLOUD PEAK RESERVOIR 9860 24.2 17.0 142 24.0 18.2 133
DOME LAKE 8880 -M 12.7 * 16.9 17.4 98
GRAVE SPRINGS 8550 11.4 11.5 100 17.4 13.4 131
HANSEN SAWMILL 8760 4.8 5.5 86 15.6 11.0 142
MIDDLE POWDER 7760 16.9 14.5 116 23.2 15.6 149
POWDER RIVER PASS 9480 11.7 8.5 140 20.2 15.5 130
SUCKER CREEK 8880 14.0 12.2 114 20.2 17.5 116
TIE CREEK 6870 -M -M * -M 14.6 *
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Basin wide percent of average 112 124
BELLE FOURCHE
BLIND PARK 6890 .0 7.3 0 18.4 14.9 125
NORTH RAPID CREEK 6130 .3 -M * 16.7 -M *
WARREN PEAK 6520 2.0 7.3 28 -M 11.0 *
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Basin wide percent of average 14 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.2 18.2 94 29.0 28.9 101
DIVIDE PEAK 8800 22.5 16.0 141 31.4 28.2 112
ELK RIVER 8700 14.4 12.5 116 28.2 22.7 124
JOE WRIGHT 10120 24.0 24.4 99 32.7 31.4 104
NORTH FRENCH CREEK 10100 40.9 28.2 146 39.8 29.0 138
OLD BATTLE 10000 39.9 37.7 107 46.3 36.7 127
SOUTH BRUSH CREEK 8400 10.4 8.4 125 25.4 21.4 120
TOWER 10500 57.8 51.0 114 48.8 44.8 110
WEBBER SPRINGS 9200 22.0 23.4 95 33.5 31.4 107
WILLOW CREEK PASS 9540 15.9 12.2 130 15.6 16.2 97
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Basin wide percent of average 115 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.9 27.0 107 31.9 24.7 130
CASPER MTN. 7900 13.5 14.5 94 22.7 19.9 115
DEADMAN HILL 10220 22.4 18.9 119 23.7 21.9 109
DEER PARK 9700 25.7 -M * 32.3 -M *
LAPRELE CREEK 8320 .0 5.0 0 20.5 15.5 133
RENO HILL 8400 15.6 11.1 141 26.2 22.9 115
ROACH 9700 -M 17.2 * 25.7 26.9 96
SAND LAKE 10080 46.3 36.4 127 37.5 25.7 146
SOUTH PASS 9040 24.4 17.4 141 29.9 21.4 140
WINDY PEAK 7840 3.9 5.8 68 18.4 13.0 142
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Basin wide percent of average 114 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 2.5 0 22.7 19.2 119
DIVIDE PEAK 8800 22.5 16.0 141 31.4 28.2 112
OLD BATTLE 10000 39.9 37.7 107 46.3 36.7 127
SANDSTONE RS 8150 5.8 6.1 94 25.4 23.7 108
WHISKEY PARK 8950 32.7 27.5 119 37.4 35.0 107
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Basin wide percent of average 113 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.0 12.0 126 18.5 19.0 98
BLIND BULL SUM 8650 32.3 22.7 143 27.2 27.5 99
EAST RIM DIVIDE 7930 14.4 13.9 104 17.4 17.9 98
ELKHART PARK G.S. 9400 15.5 12.0 129 18.4 18.7 98
GROS VENTRE SUMMIT 8775 16.0 12.1 132 18.7 18.7 101
KENDALL R.S. 7740 10.2 5.3 193 19.2 18.2 107
LOOMIS PARK 8240 -M 13.4 * 24.0 22.0 110
NEW FORK LAKE 8340 10.5 7.8 137 15.4 16.9 91
SNIDER BASIN 8250 18.7 10.9 173 22.2 17.7 126
SPRING CREEK DIVIDE 9000 37.3 27.9 134 34.7 31.5 110
TRIPLE PEAK 8500 31.4 23.2 136 37.4 35.9 105
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Basin wide percent of average 137 104
LOWER GREEN RIVER
HAMS FORK 7840 8.5 2.9 294 17.7 15.6 113
HEWINTA 9500 13.0 2.8 482 18.9 17.0 112
HICKERSON PARK 9150 5.8 1.9 317 14.5 13.0 111
HOLE-IN-ROCK 9150 9.0 1.4 636 14.7 13.0 114
INDIAN CREEK 9425 38.4 27.0 143 33.2 30.0 111
KELLEY R.S. 8180 15.9 12.6 126 23.5 21.9 108
STEEL CREEK PARK 10100 21.4 17.9 121 22.7 17.0 134
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Basin wide percent of average 169 114
UPPER BEAR RIVER
BUG LAKE 7950 25.4 13.1 194 28.2 23.2 122
HAYDEN FORK 9400 14.5 3.8 392 27.7 23.9 117
KELLEY R.S. 8180 15.9 12.6 126 23.5 21.9 108
LILY LAKE 9050 13.0 7.3 179 23.7 18.9 126
MONTE CRISTO 8960 40.3 24.2 168 36.5 31.2 118
SALT RIVER SUMMIT 7600 12.4 5.5 224 21.7 19.7 111
TRIAL LAKE 9960 27.9 22.7 124 30.2 29.2 104
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Basin wide percent of average 168 115
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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.