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 2 , 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 16.0 10.4 155 29.7 25.4 117
COTTONWOOD CREEK 7600 22.2 19.7 113 32.4 28.4 115
GRANITE CREEK 6770 -M 12.6 * -M 26.9 *
GRASSY LAKE 7265 39.3 33.5 118 46.3 42.2 110
GROS VENTRE SUMMIT 8775 16.5 13.7 121 18.2 18.2 100
LEWIS LAKE DIVIDE 7860 38.8 34.2 114 43.5 42.8 102
PHILLIPS BENCH 8200 35.8 29.4 123 35.8 33.8 106
SALT RIVER SUMMIT 7600 13.9 10.1 137 21.2 19.4 110
SNAKE RIVER STATION 6920 14.4 16.2 89 28.5 29.5 97
SPRING CREEK DIVIDE 9000 36.0 29.4 123 33.4 30.9 109
THUMB DIVIDE 7980 -M 15.0 * -M 23.7 *
TOGWOTEE PASS 9580 -M 28.2 * 32.8 32.2 103
TWO OCEAN PLATEAU 9360 39.0 27.7 142 34.9 34.9 100
WILLOW CREEK 8450 30.7 31.7 97 43.7 36.4 120
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Basin wide percent of average 119 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.0 26.0 104 27.2 21.4 128
BLACK BEAR 7950 -M 39.8 * 50.0 46.8 108
CANYON 7940 15.4 10.6 145 21.0 16.4 129
FISHER CREEK 9100 -M 38.8 * 41.4 42.4 98
MADISON PLATEAU 7750 -M 23.5 * 35.0 30.2 117
NORTHEAST ENTRANCE 7350 5.5 5.8 97 16.4 14.0 117
PARKER PEAK 9400 27.0 23.7 114 -M 18.4 *
SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140
THUMB DIVIDE 7980 -M 15.0 * -M 23.7 *
TWO OCEAN PLATEAU 9360 39.0 27.7 142 34.9 34.9 100
WHISKEY CREEK 6800 19.9 14.9 134 26.9 25.0 108
WHITE MILL 8700 30.0 26.4 115 28.2 32.8 86
WOLVERINE 7650 7.8 7.8 99 15.0 15.4 99
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Basin wide percent of average 118 109
WIND RIVER
BURROUGHS CREEK 8750 18.7 12.5 150 21.4 19.5 110
COLD SPRINGS 9630 -M 6.6 * -M 13.2 *
DEER PARK 9700 25.9 -M * 31.7 -M *
HOBBS PARK 10100 29.0 18.0 162 -M 17.5 *
LITTLE WARM 9620 -M 10.1 * 23.0 16.4 141
SOUTH PASS 9040 24.9 18.0 138 29.4 20.9 141
ST. LAWRENCE ALT 8620 14.4 5.3 276 20.5 12.6 163
TOGWOTEE PASS 9580 -M 28.2 * 32.8 32.2 103
TOWNSEND CREEK 8700 19.5 9.4 210 25.0 15.7 160
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Basin wide percent of average 169 130
BIGHORN BASIN
BALD MTN. 9375 21.7 24.2 90 21.9 21.0 104
BEAR TRAP MEADOW 7900 .0 4.1 22 14.1 10.9 131
BLACKWATER 9780 35.0 25.7 137 28.7 20.9 138
BONE SPRINGS DIV 9350 20.2 18.4 110 21.4 18.4 117
EVENING STAR 9200 36.2 30.9 118 39.4 26.2 151
GRAVE SPRINGS 8550 11.0 11.6 95 16.7 12.6 133
KIRWIN 9550 16.7 11.6 144 19.2 13.5 144
MARQUETTE 8760 17.2 8.6 199 18.7 13.7 137
MIDDLE POWDER 7760 16.0 14.9 108 21.9 15.0 146
OWL CREEK 8975 10.6 3.3 322 12.2 8.2 149
POWDER RIVER PASS 9480 12.5 10.2 122 19.2 15.0 129
SHELL CREEK 9580 17.7 17.0 105 18.2 16.2 113
SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140
SYLVAN ROAD 8120 11.0 7.8 142 21.4 18.9 114
TIMBER CREEK 7950 10.0 5.8 173 15.1 10.2 149
YOUNTS PEAK 8350 21.7 18.2 119 21.2 19.4 110
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Basin wide percent of average 120 130
SHOSHONE RIVER
BLACKWATER 9780 35.0 25.7 137 28.7 20.9 138
EVENING STAR 9200 36.2 30.9 118 39.4 26.2 151
KIRWIN 9550 16.7 11.6 144 19.2 13.5 144
MARQUETTE 8760 17.2 8.6 199 18.7 13.7 137
SYLVAN LAKE 8420 24.7 23.7 105 31.4 22.5 140
SYLVAN ROAD 8120 11.0 7.8 142 21.4 18.9 114
YOUNTS PEAK 8350 21.7 18.2 119 21.2 19.4 110
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Basin wide percent of average 129 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 4.1 22 14.1 10.9 131
BIG GOOSE 7990 9.9 -M * 16.7 -M *
BONE SPRINGS DIV 9350 20.2 18.4 110 21.4 18.4 117
BURGESS JUNCTION 7880 10.7 13.5 80 15.5 14.6 107
CLOUD PEAK RESERVOIR 9860 23.4 17.7 133 22.9 17.4 132
DOME LAKE 8880 -M 14.7 * 16.2 16.7 98
GRAVE SPRINGS 8550 11.0 11.6 95 16.7 12.6 133
HANSEN SAWMILL 8760 5.6 6.8 84 15.0 10.5 145
MIDDLE POWDER 7760 16.0 14.9 108 21.9 15.0 146
POWDER RIVER PASS 9480 12.5 10.2 122 19.2 15.0 129
SUCKER CREEK 8880 14.1 13.6 104 19.0 16.7 114
TIE CREEK 6870 -M -M * -M 14.0 *
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Basin wide percent of average 104 124
BELLE FOURCHE
BLIND PARK 6890 .0 9.4 0 17.9 14.0 128
NORTH RAPID CREEK 6130 .9 -M * 16.5 -M *
WARREN PEAK 6520 5.5 9.4 59 13.1 10.5 126
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Basin wide percent of average 30 127
UPPER N. PLATTE RIVER
COLUMBINE 9400 16.5 21.7 77 27.7 28.2 98
DIVIDE PEAK 8800 20.9 18.9 111 29.7 27.5 109
ELK RIVER 8700 14.0 15.7 89 27.2 22.2 123
JOE WRIGHT 10120 22.7 24.7 92 30.9 30.5 102
NORTH FRENCH CREEK 10100 38.4 29.4 132 37.2 28.2 132
OLD BATTLE 10000 36.9 38.3 97 43.4 35.9 121
SOUTH BRUSH CREEK 8400 9.5 10.4 93 23.0 20.7 112
TOWER 10500 55.2 51.2 108 46.3 43.5 107
WEBBER SPRINGS 9200 21.2 25.7 83 31.7 30.9 103
WILLOW CREEK PASS 9540 15.0 13.5 112 14.5 15.5 94
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Basin wide percent of average 101 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 -M 28.7 * 30.0 24.0 125
CASPER MTN. 7900 13.1 17.4 76 21.2 19.0 112
DEADMAN HILL 10220 21.2 19.2 111 22.5 21.4 106
DEER PARK 9700 25.9 -M * 31.7 -M *
LAPRELE CREEK 8320 .0 6.1 0 19.7 15.0 133
RENO HILL 8400 15.0 13.1 115 24.5 22.5 109
ROACH 9700 19.0 18.0 106 24.9 26.0 96
SAND LAKE 10080 46.2 37.2 125 37.2 25.0 149
SOUTH PASS 9040 24.9 18.0 138 29.4 20.9 141
WINDY PEAK 7840 6.0 7.6 79 17.7 12.5 142
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Basin wide percent of average 107 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.0 4.5 67 21.9 18.7 118
DIVIDE PEAK 8800 20.9 18.9 111 29.7 27.5 109
OLD BATTLE 10000 36.9 38.3 97 43.4 35.9 121
SANDSTONE RS 8150 6.8 9.4 73 24.7 23.2 107
WHISKEY PARK 8950 30.7 29.4 105 35.5 34.3 104
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Basin wide percent of average 98 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.0 13.7 117 18.2 18.7 98
BLIND BULL SUM 8650 32.2 22.7 142 26.4 27.0 98
EAST RIM DIVIDE 7930 14.7 14.7 100 17.2 17.4 99
ELKHART PARK G.S. 9400 16.2 13.9 117 17.9 18.4 98
GROS VENTRE SUMMIT 8775 16.5 13.7 121 18.2 18.2 100
KENDALL R.S. 7740 12.0 10.0 121 19.2 17.7 108
LOOMIS PARK 8240 -M 15.0 * 23.7 21.5 111
NEW FORK LAKE 8340 12.1 9.0 136 15.1 16.5 92
SNIDER BASIN 8250 19.9 12.7 157 21.9 17.4 127
SPRING CREEK DIVIDE 9000 36.0 29.4 123 33.4 30.9 109
TRIPLE PEAK 8500 31.9 24.9 129 36.4 35.3 104
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Basin wide percent of average 127 104
LOWER GREEN RIVER
HAMS FORK 7840 10.0 5.3 189 16.9 15.4 111
HEWINTA 9500 12.7 5.0 255 18.0 16.4 110
HICKERSON PARK 9150 5.8 2.8 208 13.7 12.5 111
HOLE-IN-ROCK 9150 8.6 2.3 391 14.1 12.5 114
INDIAN CREEK 9425 37.2 28.7 130 31.9 29.4 109
KELLEY R.S. 8180 16.5 14.7 113 22.7 21.4 107
STEEL CREEK PARK 10100 20.0 18.9 107 21.5 16.4 132
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Basin wide percent of average 143 113
UPPER BEAR RIVER
BUG LAKE 7950 24.9 15.6 160 27.0 22.7 119
HAYDEN FORK 9400 13.7 6.3 221 25.4 23.2 110
KELLEY R.S. 8180 16.5 14.7 113 22.7 21.4 107
LILY LAKE 9050 13.0 8.5 152 22.4 18.2 124
MONTE CRISTO 8960 36.7 25.9 142 34.2 30.5 112
SALT RIVER SUMMIT 7600 13.9 10.1 137 21.2 19.4 110
TRIAL LAKE 9960 25.4 23.9 107 28.0 28.5 99
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Basin wide percent of average 138 111
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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.