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 5 , 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 15.2 9.1 168 29.7 25.7 117
COTTONWOOD CREEK 7600 23.4 18.4 128 34.0 28.7 119
GRANITE CREEK 6770 16.2 11.5 142 26.9 27.2 99
GRASSY LAKE 7265 39.8 32.0 125 47.9 42.5 113
GROS VENTRE SUMMIT 8775 16.4 13.0 128 18.7 18.4 102
LEWIS LAKE DIVIDE 7860 39.7 33.2 120 44.3 43.3 103
PHILLIPS BENCH 8200 35.3 28.4 125 36.3 34.2 107
SALT RIVER SUMMIT 7600 13.5 7.8 174 21.5 19.5 111
SNAKE RIVER STATION 6920 13.7 15.0 92 29.2 29.9 98
SPRING CREEK DIVIDE 9000 37.3 28.7 131 34.5 31.2 111
THUMB DIVIDE 7980 -M 14.0 * -M 24.0 *
TOGWOTEE PASS 9580 -M 27.7 * 33.2 32.4 103
TWO OCEAN PLATEAU 9360 40.7 27.4 149 35.4 35.3 101
WILLOW CREEK 8450 31.7 30.9 103 45.8 36.8 125
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Basin wide percent of average 127 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.4 25.7 111 27.4 21.7 127
BLACK BEAR 7950 55.4 39.0 143 51.8 47.2 110
CANYON 7940 14.5 9.7 150 21.2 16.7 127
FISHER CREEK 9100 40.8 38.4 106 41.9 42.9 98
MADISON PLATEAU 7750 -M 22.5 * 36.7 30.4 121
NORTHEAST ENTRANCE 7350 5.0 5.0 99 16.5 14.4 116
PARKER PEAK 9400 27.2 23.5 116 -M 18.7 *
SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140
THUMB DIVIDE 7980 -M 14.0 * -M 24.0 *
TWO OCEAN PLATEAU 9360 40.7 27.4 149 35.4 35.3 101
WHISKEY CREEK 6800 19.9 13.6 146 28.2 25.4 112
WHITE MILL 8700 30.7 26.0 119 28.7 33.3 87
WOLVERINE 7650 6.0 6.8 90 15.1 15.6 97
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Basin wide percent of average 124 110
WIND RIVER
BURROUGHS CREEK 8750 18.7 11.2 167 21.5 19.9 109
COLD SPRINGS 9630 19.4 5.8 339 23.4 13.5 173
DEER PARK 9700 26.2 -M * 32.3 -M *
HOBBS PARK 10100 29.5 17.7 167 27.2 17.9 153
LITTLE WARM 9620 19.9 9.0 221 23.2 16.7 139
SOUTH PASS 9040 24.9 17.7 141 29.7 21.2 141
ST. LAWRENCE ALT 8620 14.2 4.6 309 20.7 12.9 161
TOGWOTEE PASS 9580 -M 27.7 * 33.2 32.4 103
TOWNSEND CREEK 8700 19.9 8.6 231 25.5 16.0 160
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Basin wide percent of average 197 136
BIGHORN BASIN
BALD MTN. 9375 22.4 24.2 93 22.2 21.4 104
BEAR TRAP MEADOW 7900 1.4 3.5 38 14.9 11.1 134
BLACKWATER 9780 35.0 25.5 138 29.0 21.2 138
BONE SPRINGS DIV 9350 20.2 17.9 113 21.7 18.7 117
EVENING STAR 9200 36.8 30.7 120 39.8 26.5 150
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.0 135
KIRWIN 9550 16.4 11.4 145 19.4 13.7 141
MARQUETTE 8760 17.2 8.5 204 18.9 14.0 135
MIDDLE POWDER 7760 17.0 14.6 117 23.0 15.4 151
OWL CREEK 8975 10.5 2.8 376 12.7 8.5 150
POWDER RIVER PASS 9480 12.2 9.4 132 20.0 15.2 132
SHELL CREEK 9580 18.0 17.0 106 18.9 16.5 114
SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140
SYLVAN ROAD 8120 10.0 6.8 148 21.9 19.2 115
TIMBER CREEK 7950 10.5 5.0 209 16.0 10.5 152
YOUNTS PEAK 8350 21.4 17.7 122 21.2 19.7 108
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Basin wide percent of average 125 131
SHOSHONE RIVER
BLACKWATER 9780 35.0 25.5 138 29.0 21.2 138
EVENING STAR 9200 36.8 30.7 120 39.8 26.5 150
KIRWIN 9550 16.4 11.4 145 19.4 13.7 141
MARQUETTE 8760 17.2 8.5 204 18.9 14.0 135
SYLVAN LAKE 8420 24.5 22.9 107 31.9 22.9 140
SYLVAN ROAD 8120 10.0 6.8 148 21.9 19.2 115
YOUNTS PEAK 8350 21.4 17.7 122 21.2 19.7 108
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Basin wide percent of average 131 133
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.4 3.5 38 14.9 11.1 134
BIG GOOSE 7990 10.0 -M * 17.4 -M *
BONE SPRINGS DIV 9350 20.2 17.9 113 21.7 18.7 117
BURGESS JUNCTION 7880 10.7 13.0 83 16.0 15.0 108
CLOUD PEAK RESERVOIR 9860 24.2 17.4 140 23.9 17.7 135
DOME LAKE 8880 -M 13.7 * 16.9 16.9 100
GRAVE SPRINGS 8550 11.5 11.5 100 17.4 13.0 135
HANSEN SAWMILL 8760 5.6 6.1 92 15.6 10.7 146
MIDDLE POWDER 7760 17.0 14.6 117 23.0 15.4 151
POWDER RIVER PASS 9480 12.2 9.4 132 20.0 15.2 132
SUCKER CREEK 8880 14.0 13.0 109 19.7 17.2 115
TIE CREEK 6870 -M -M * -M 14.4 *
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Basin wide percent of average 110 126
BELLE FOURCHE
BLIND PARK 6890 .0 8.2 0 18.4 14.5 128
NORTH RAPID CREEK 6130 .3 -M * 16.7 -M *
WARREN PEAK 6520 3.8 8.2 47 -M 10.7 *
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Basin wide percent of average 24 128*
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.0 19.9 86 28.4 28.5 100
DIVIDE PEAK 8800 21.5 17.4 124 30.7 27.9 111
ELK RIVER 8700 14.2 14.0 102 26.7 22.5 119
JOE WRIGHT 10120 23.4 24.5 96 31.5 30.9 102
NORTH FRENCH CREEK 10100 39.9 28.7 140 38.8 28.7 136
OLD BATTLE 10000 39.3 37.9 104 45.3 36.3 125
SOUTH BRUSH CREEK 8400 9.7 9.4 105 23.7 21.0 113
TOWER 10500 57.3 51.2 112 47.8 44.2 109
WEBBER SPRINGS 9200 22.2 24.5 91 32.8 31.2 106
WILLOW CREEK PASS 9540 15.7 12.9 123 15.0 15.9 95
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Basin wide percent of average 109 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.4 27.9 103 30.9 24.4 128
CASPER MTN. 7900 13.9 16.0 87 22.7 19.4 117
DEADMAN HILL 10220 21.7 19.0 115 23.2 21.7 107
DEER PARK 9700 26.2 -M * 32.3 -M *
LAPRELE CREEK 8320 .0 5.5 0 20.2 15.2 133
RENO HILL 8400 16.2 12.1 134 25.7 22.7 114
ROACH 9700 -M 17.7 * 25.4 26.4 97
SAND LAKE 10080 46.3 36.8 126 36.4 25.4 144
SOUTH PASS 9040 24.9 17.7 141 29.7 21.2 141
WINDY PEAK 7840 5.1 6.8 77 17.9 12.7 141
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Basin wide percent of average 111 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.4 3.5 41 22.2 18.9 117
DIVIDE PEAK 8800 21.5 17.4 124 30.7 27.9 111
OLD BATTLE 10000 39.3 37.9 104 45.3 36.3 125
SANDSTONE RS 8150 6.3 7.8 82 25.0 23.4 107
WHISKEY PARK 8950 31.9 28.4 113 36.7 34.7 106
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Basin wide percent of average 106 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.9 12.9 124 18.4 18.9 98
BLIND BULL SUM 8650 32.4 22.7 143 26.9 27.4 99
EAST RIM DIVIDE 7930 14.9 14.4 104 17.4 17.7 99
ELKHART PARK G.S. 9400 16.2 13.0 125 18.4 18.5 99
GROS VENTRE SUMMIT 8775 16.4 13.0 128 18.7 18.4 102
KENDALL R.S. 7740 11.5 7.6 152 19.2 17.9 108
LOOMIS PARK 8240 -M 14.1 * 24.0 21.9 111
NEW FORK LAKE 8340 12.1 8.4 146 15.0 16.7 90
SNIDER BASIN 8250 19.7 11.9 167 22.2 17.5 127
SPRING CREEK DIVIDE 9000 37.3 28.7 131 34.5 31.2 111
TRIPLE PEAK 8500 31.9 24.0 133 37.3 35.5 105
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Basin wide percent of average 134 105
LOWER GREEN RIVER
HAMS FORK 7840 10.0 4.1 244 17.5 15.5 113
HEWINTA 9500 13.5 3.8 353 18.9 16.7 113
HICKERSON PARK 9150 6.6 2.3 287 14.5 12.7 114
HOLE-IN-ROCK 9150 9.0 1.9 500 14.6 12.7 115
INDIAN CREEK 9425 37.8 27.9 136 32.8 29.7 111
KELLEY R.S. 8180 16.9 13.6 124 23.4 21.7 108
STEEL CREEK PARK 10100 21.2 18.4 116 22.5 16.7 136
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Basin wide percent of average 161 115
UPPER BEAR RIVER
BUG LAKE 7950 25.9 14.5 180 28.2 22.9 123
HAYDEN FORK 9400 15.0 5.0 299 27.4 23.5 117
KELLEY R.S. 8180 16.9 13.6 124 23.4 21.7 108
LILY LAKE 9050 14.1 8.0 179 23.7 18.5 128
MONTE CRISTO 8960 38.8 25.0 156 36.3 30.9 118
SALT RIVER SUMMIT 7600 13.5 7.8 174 21.5 19.5 111
TRIAL LAKE 9960 27.9 23.2 120 30.2 28.9 105
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Basin wide percent of average 157 115
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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.