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 THURSDAY: MAY 6 , 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 15.5 8.6 180 29.9 25.7 116
COTTONWOOD CREEK 7600 23.4 17.9 131 34.3 28.7 120
GRANITE CREEK 6770 16.0 11.0 145 26.9 27.4 99
GRASSY LAKE 7265 40.2 31.7 127 47.9 42.8 113
GROS VENTRE SUMMIT 8775 16.5 12.6 131 18.9 18.5 102
LEWIS LAKE DIVIDE 7860 39.7 32.8 122 44.5 43.4 103
PHILLIPS BENCH 8200 35.3 28.2 126 36.4 34.3 107
SALT RIVER SUMMIT 7600 13.6 7.0 195 21.7 19.7 111
SNAKE RIVER STATION 6920 13.9 14.7 94 29.2 30.0 98
SPRING CREEK DIVIDE 9000 37.2 28.4 131 34.7 31.4 111
THUMB DIVIDE 7980 -M 13.9 * -M 24.2 *
TOGWOTEE PASS 9580 -M 27.5 * 33.3 32.5 103
TWO OCEAN PLATEAU 9360 40.9 27.2 151 35.4 35.3 101
WILLOW CREEK 8450 31.7 30.5 104 45.9 36.9 125
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Basin wide percent of average 130 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.7 25.7 112 27.4 21.9 125
BLACK BEAR 7950 55.8 38.9 144 51.8 47.3 110
CANYON 7940 14.6 9.5 156 21.2 16.9 126
FISHER CREEK 9100 40.9 38.3 107 41.9 43.0 98
MADISON PLATEAU 7750 -M 22.2 * 36.7 30.5 121
NORTHEAST ENTRANCE 7350 5.0 4.8 103 16.5 14.5 115
PARKER PEAK 9400 27.2 23.4 117 -M 18.9 *
SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140
THUMB DIVIDE 7980 -M 13.9 * -M 24.2 *
TWO OCEAN PLATEAU 9360 40.9 27.2 151 35.4 35.3 101
WHISKEY CREEK 6800 19.9 13.2 151 28.4 25.4 112
WHITE MILL 8700 30.7 25.9 119 28.7 33.3 86
WOLVERINE 7650 6.0 6.3 96 15.4 15.7 98
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Basin wide percent of average 125 110
WIND RIVER
BURROUGHS CREEK 8750 18.7 10.9 173 21.5 20.0 108
COLD SPRINGS 9630 19.2 5.5 356 23.4 13.6 172
DEER PARK 9700 26.2 -M * 32.3 -M *
HOBBS PARK 10100 29.5 17.7 167 27.2 17.9 152
LITTLE WARM 9620 19.9 8.7 229 23.2 16.9 138
SOUTH PASS 9040 25.2 17.7 143 29.9 21.2 141
ST. LAWRENCE ALT 8620 14.4 4.5 325 20.7 13.0 161
TOGWOTEE PASS 9580 -M 27.5 * 33.3 32.5 103
TOWNSEND CREEK 8700 19.9 8.4 239 25.5 16.2 159
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Basin wide percent of average 201 136
BIGHORN BASIN
BALD MTN. 9375 22.7 24.4 94 22.4 21.7 104
BEAR TRAP MEADOW 7900 1.4 3.3 40 14.9 11.2 133
BLACKWATER 9780 35.0 25.4 138 28.9 21.2 137
BONE SPRINGS DIV 9350 20.2 17.9 114 21.7 18.9 116
EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.1 133
KIRWIN 9550 16.4 11.2 146 19.4 13.9 140
MARQUETTE 8760 17.0 8.4 205 18.9 14.2 133
MIDDLE POWDER 7760 17.2 14.6 118 23.2 15.5 151
OWL CREEK 8975 10.5 2.7 404 12.7 8.6 148
POWDER RIVER PASS 9480 12.4 9.0 137 20.2 15.4 132
SHELL CREEK 9580 18.0 17.0 106 19.0 16.7 115
SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140
SYLVAN ROAD 8120 10.2 6.6 155 21.9 19.2 114
TIMBER CREEK 7950 10.5 4.8 219 16.0 10.7 149
YOUNTS PEAK 8350 21.5 17.5 123 21.2 19.9 108
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Basin wide percent of average 126 130
SHOSHONE RIVER
BLACKWATER 9780 35.0 25.4 138 28.9 21.2 137
EVENING STAR 9200 37.0 30.7 121 39.8 26.7 150
KIRWIN 9550 16.4 11.2 146 19.4 13.9 140
MARQUETTE 8760 17.0 8.4 205 18.9 14.2 133
SYLVAN LAKE 8420 24.2 22.7 107 32.0 23.0 140
SYLVAN ROAD 8120 10.2 6.6 155 21.9 19.2 114
YOUNTS PEAK 8350 21.5 17.5 123 21.2 19.9 108
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Basin wide percent of average 132 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.4 3.3 40 14.9 11.2 133
BIG GOOSE 7990 10.1 -M * 17.5 -M *
BONE SPRINGS DIV 9350 20.2 17.9 114 21.7 18.9 116
BURGESS JUNCTION 7880 10.9 12.7 86 16.0 15.0 107
CLOUD PEAK RESERVOIR 9860 24.4 17.2 142 23.9 17.9 134
DOME LAKE 8880 -M 13.5 * 16.9 17.2 99
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.1 133
HANSEN SAWMILL 8760 5.6 6.0 95 15.7 10.9 146
MIDDLE POWDER 7760 17.2 14.6 118 23.2 15.5 151
POWDER RIVER PASS 9480 12.4 9.0 137 20.2 15.4 132
SUCKER CREEK 8880 14.0 12.7 111 19.9 17.2 116
TIE CREEK 6870 -M -M * -M 14.5 *
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Basin wide percent of average 112 125
BELLE FOURCHE
BLIND PARK 6890 .0 8.0 0 18.4 14.6 127
NORTH RAPID CREEK 6130 .3 -M * 16.7 -M *
WARREN PEAK 6520 3.3 8.0 42 -M 10.9 *
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Basin wide percent of average 21 127*
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.4 19.4 91 28.5 28.7 100
DIVIDE PEAK 8800 22.0 16.9 131 30.9 27.9 111
ELK RIVER 8700 14.7 13.5 109 27.4 22.5 122
JOE WRIGHT 10120 24.2 24.4 99 32.4 31.2 105
NORTH FRENCH CREEK 10100 41.2 28.5 145 39.9 28.7 140
OLD BATTLE 10000 40.0 37.8 106 45.8 36.4 126
SOUTH BRUSH CREEK 8400 10.1 9.0 113 25.4 21.2 121
TOWER 10500 58.0 51.0 114 48.3 44.3 109
WEBBER SPRINGS 9200 22.5 24.2 94 33.3 31.2 107
WILLOW CREEK PASS 9540 16.0 12.5 128 15.2 16.0 96
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Basin wide percent of average 113 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 29.0 27.5 106 31.9 24.4 131
CASPER MTN. 7900 13.7 15.5 89 22.7 19.5 116
DEADMAN HILL 10220 22.2 19.0 117 23.7 21.7 109
DEER PARK 9700 26.2 -M * 32.3 -M *
LAPRELE CREEK 8320 .2 5.3 2 20.4 15.4 133
RENO HILL 8400 16.2 11.7 138 25.9 22.9 114
ROACH 9700 -M 17.4 * 25.7 26.7 97
SAND LAKE 10080 46.3 36.7 127 37.3 25.4 147
SOUTH PASS 9040 25.2 17.7 143 29.9 21.2 141
WINDY PEAK 7840 5.0 6.5 79 17.9 12.9 140
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Basin wide percent of average 113 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.5 3.2 49 22.4 18.9 119
DIVIDE PEAK 8800 22.0 16.9 131 30.9 27.9 111
OLD BATTLE 10000 40.0 37.8 106 45.8 36.4 126
SANDSTONE RS 8150 6.8 7.3 95 25.4 23.5 108
WHISKEY PARK 8950 32.4 28.2 116 37.3 34.8 108
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Basin wide percent of average 111 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.7 12.5 126 18.4 18.9 98
BLIND BULL SUM 8650 32.4 22.7 144 27.0 27.4 99
EAST RIM DIVIDE 7930 15.0 14.1 106 17.4 17.7 99
ELKHART PARK G.S. 9400 16.2 12.6 128 18.4 18.7 99
GROS VENTRE SUMMIT 8775 16.5 12.6 131 18.9 18.5 102
KENDALL R.S. 7740 11.6 7.0 169 19.2 18.0 107
LOOMIS PARK 8240 -M 13.9 * 24.0 21.9 111
NEW FORK LAKE 8340 12.1 8.1 150 15.0 16.9 90
SNIDER BASIN 8250 19.5 11.5 172 22.2 17.7 126
SPRING CREEK DIVIDE 9000 37.2 28.4 131 34.7 31.4 111
TRIPLE PEAK 8500 31.9 23.7 135 37.3 35.8 105
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Basin wide percent of average 136 105
LOWER GREEN RIVER
HAMS FORK 7840 10.1 3.8 273 17.5 15.5 113
HEWINTA 9500 13.5 3.5 386 18.9 16.9 113
HICKERSON PARK 9150 6.5 2.2 310 14.4 12.9 112
HOLE-IN-ROCK 9150 9.1 1.7 536 14.7 12.9 115
INDIAN CREEK 9425 37.9 27.5 138 32.9 29.7 111
KELLEY R.S. 8180 16.9 13.4 128 23.4 21.9 108
STEEL CREEK PARK 10100 21.2 18.2 118 22.7 16.7 136
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Basin wide percent of average 165 115
UPPER BEAR RIVER
BUG LAKE 7950 25.9 14.0 187 28.2 23.0 123
HAYDEN FORK 9400 15.0 4.5 334 27.4 23.7 116
KELLEY R.S. 8180 16.9 13.4 128 23.4 21.9 108
LILY LAKE 9050 14.2 7.8 185 23.7 18.7 127
MONTE CRISTO 8960 38.8 24.7 157 36.3 30.9 118
SALT RIVER SUMMIT 7600 13.6 7.0 195 21.7 19.7 111
TRIAL LAKE 9960 27.9 23.0 122 30.2 28.9 105
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Basin wide percent of average 162 115
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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.