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 13 , 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 13.1 5.8 230 30.2 26.4 115
COTTONWOOD CREEK 7600 23.7 15.0 159 35.5 29.4 121
GRANITE CREEK 6770 14.1 8.2 172 27.4 28.0 98
GRASSY LAKE 7265 39.0 28.2 139 48.3 43.8 111
GROS VENTRE SUMMIT 8775 16.4 10.7 153 19.7 18.9 104
LEWIS LAKE DIVIDE 7860 38.0 30.4 126 44.8 44.4 101
PHILLIPS BENCH 8200 33.9 26.0 131 36.8 35.0 106
SALT RIVER SUMMIT 7600 12.0 1.7 750 22.4 20.2 111
SNAKE RIVER STATION 6920 11.0 12.4 89 29.4 30.7 96
SPRING CREEK DIVIDE 9000 37.5 26.7 141 35.4 32.0 111
THUMB DIVIDE 7980 16.9 11.9 143 25.9 24.7 106
TOGWOTEE PASS 9580 -M 26.4 * 34.4 33.3 104
TWO OCEAN PLATEAU 9360 41.7 26.5 157 35.9 36.3 100
WILLOW CREEK 8450 31.9 28.4 113 47.3 37.8 126
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Basin wide percent of average 143 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.9 25.2 116 27.7 22.7 122
BLACK BEAR 7950 56.0 37.5 150 53.3 48.2 111
CANYON 7940 12.5 7.3 173 21.5 17.4 124
FISHER CREEK 9100 41.3 37.7 110 42.4 44.2 97
MADISON PLATEAU 7750 -M 19.7 * 37.8 31.4 121
NORTHEAST ENTRANCE 7350 2.0 3.2 65 16.9 15.0 113
PARKER PEAK 9400 26.4 22.9 116 -M 19.5 *
SYLVAN LAKE 8420 24.2 21.2 115 32.3 23.9 135
THUMB DIVIDE 7980 16.9 11.9 143 25.9 24.7 106
TWO OCEAN PLATEAU 9360 41.7 26.5 157 35.9 36.3 100
WHISKEY CREEK 6800 18.9 10.5 181 28.9 26.0 112
WHITE MILL 8700 30.5 25.2 122 28.9 34.3 85
WOLVERINE 7650 1.4 3.8 37 15.4 16.4 94
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Basin wide percent of average 130 108
WIND RIVER
BURROUGHS CREEK 8750 18.4 7.8 236 22.2 20.7 108
COLD SPRINGS 9630 18.2 3.4 536 24.0 14.4 168
DEER PARK 9700 26.4 -M * 33.0 -M *
HOBBS PARK 10100 30.4 17.2 178 27.9 18.7 150
LITTLE WARM 9620 20.4 6.3 328 24.5 17.5 141
SOUTH PASS 9040 24.5 16.9 146 30.4 22.0 138
ST. LAWRENCE ALT 8620 12.6 2.9 435 21.2 13.5 158
TOGWOTEE PASS 9580 -M 26.4 * 34.4 33.3 104
TOWNSEND CREEK 8700 18.5 6.6 281 25.9 16.9 155
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Basin wide percent of average 235 135
BIGHORN BASIN
BALD MTN. 9375 25.0 24.4 103 24.7 22.7 110
BEAR TRAP MEADOW 7900 1.2 1.9 58 16.4 12.0 137
BLACKWATER 9780 35.8 25.0 143 29.4 22.0 134
BONE SPRINGS DIV 9350 22.2 16.9 131 24.0 19.7 122
EVENING STAR 9200 36.8 30.4 122 40.0 27.5 146
GRAVE SPRINGS 8550 11.2 11.1 101 18.4 14.0 132
KIRWIN 9550 17.5 10.5 169 20.7 14.5 143
MARQUETTE 8760 17.2 7.8 221 19.9 15.0 133
MIDDLE POWDER 7760 17.5 14.2 124 23.2 16.2 143
OWL CREEK 8975 10.9 1.4 772 14.5 9.2 158
POWDER RIVER PASS 9480 12.2 7.0 177 21.7 16.2 135
SHELL CREEK 9580 19.4 17.0 115 20.5 17.5 118
SYLVAN LAKE 8420 24.2 21.2 115 32.3 23.9 135
SYLVAN ROAD 8120 7.3 4.6 157 21.9 19.9 110
TIMBER CREEK 7950 10.5 3.0 347 16.9 11.5 147
YOUNTS PEAK 8350 21.2 16.2 131 21.9 20.5 107
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Basin wide percent of average 137 130
SHOSHONE RIVER
BLACKWATER 9780 35.8 25.0 143 29.4 22.0 134
EVENING STAR 9200 36.8 30.4 122 40.0 27.5 146
KIRWIN 9550 17.5 10.5 169 20.7 14.5 143
MARQUETTE 8760 17.2 7.8 221 19.9 15.0 133
SYLVAN LAKE 8420 24.2 21.2 115 32.3 23.9 135
SYLVAN ROAD 8120 7.3 4.6 157 21.9 19.9 110
YOUNTS PEAK 8350 21.2 16.2 131 21.9 20.5 107
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Basin wide percent of average 139 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.2 1.9 58 16.4 12.0 137
BIG GOOSE 7990 9.7 -M * 18.4 -M *
BONE SPRINGS DIV 9350 22.2 16.9 131 24.0 19.7 122
BURGESS JUNCTION 7880 11.9 11.5 103 17.7 15.7 113
CLOUD PEAK RESERVOIR 9860 24.9 16.4 152 25.0 18.9 133
DOME LAKE 8880 -M 11.0 * 17.7 17.9 99
GRAVE SPRINGS 8550 11.2 11.1 101 18.4 14.0 132
HANSEN SAWMILL 8760 4.3 4.5 96 17.2 11.5 151
MIDDLE POWDER 7760 17.5 14.2 124 23.2 16.2 143
POWDER RIVER PASS 9480 12.2 7.0 177 21.7 16.2 135
SUCKER CREEK 8880 15.0 11.0 136 21.7 18.2 120
TIE CREEK 6870 -M -M * -M 15.1 *
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Basin wide percent of average 128 127
BELLE FOURCHE
BLIND PARK 6890 .3 5.5 4 19.4 15.6 124
NORTH RAPID CREEK 6130 .0 -M * 17.4 -M *
WARREN PEAK 6520 1.9 5.5 34 -M 11.5 *
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Basin wide percent of average 19 124*
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.4 15.4 100 29.7 29.2 102
DIVIDE PEAK 8800 20.4 13.5 152 32.2 28.7 112
ELK RIVER 8700 11.0 9.7 113 28.9 23.2 125
JOE WRIGHT 10120 23.5 23.9 99 33.3 32.2 104
NORTH FRENCH CREEK 10100 40.5 27.2 150 39.8 29.7 135
OLD BATTLE 10000 40.0 37.2 108 47.0 37.3 127
SOUTH BRUSH CREEK 8400 10.0 6.6 151 25.7 21.7 118
TOWER 10500 57.4 50.9 113 49.7 45.8 109
WEBBER SPRINGS 9200 20.4 21.4 96 34.2 31.9 107
WILLOW CREEK PASS 9540 15.5 11.1 140 16.4 16.7 99
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Basin wide percent of average 118 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.7 25.5 113 32.3 25.2 129
CASPER MTN. 7900 12.9 12.2 105 23.4 20.4 115
DEADMAN HILL 10220 22.2 18.7 119 24.2 22.5 108
DEER PARK 9700 26.4 -M * 33.0 -M *
LAPRELE CREEK 8320 .0 3.9 0 20.9 16.2 130
RENO HILL 8400 14.1 9.4 152 26.7 23.2 116
ROACH 9700 -M 16.4 * 26.0 27.7 95
SAND LAKE 10080 46.3 35.8 130 37.8 26.2 145
SOUTH PASS 9040 24.5 16.9 146 30.4 22.0 138
WINDY PEAK 7840 .9 4.3 20 18.7 13.6 137
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Basin wide percent of average 119 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .7 0* 23.2 19.5 119
DIVIDE PEAK 8800 20.4 13.5 152 32.2 28.7 112
OLD BATTLE 10000 40.0 37.2 108 47.0 37.3 127
SANDSTONE RS 8150 3.2 3.4 92 26.4 24.2 109
WHISKEY PARK 8950 30.7 26.0 119 38.0 35.8 107
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Basin wide percent of average 117 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.9 10.5 143 19.2 19.4 99
BLIND BULL SUM 8650 32.7 22.5 145 27.7 28.0 99
EAST RIM DIVIDE 7930 14.5 13.0 111 17.9 18.2 99
ELKHART PARK G.S. 9400 16.0 10.5 152 19.4 19.0 102
GROS VENTRE SUMMIT 8775 16.4 10.7 153 19.7 18.9 104
KENDALL R.S. 7740 9.6 1.7 600 20.0 18.5 109
LOOMIS PARK 8240 -M 12.0 * 24.7 22.4 111
NEW FORK LAKE 8340 10.9 6.8 162 16.2 17.2 95
SNIDER BASIN 8250 17.9 9.2 195 22.7 18.0 127
SPRING CREEK DIVIDE 9000 37.5 26.7 141 35.4 32.0 111
TRIPLE PEAK 8500 30.9 21.9 142 38.0 36.5 105
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Basin wide percent of average 151 106
LOWER GREEN RIVER
HAMS FORK 7840 6.6 .0 734* 18.2 16.0 115
HEWINTA 9500 11.9 .9 1476* 19.2 17.4 110
HICKERSON PARK 9150 3.9 1.0 390 14.5 13.5 108
HOLE-IN-ROCK 9150 7.5 .9 938 15.0 13.5 111
INDIAN CREEK 9425 38.8 25.5 153 34.3 30.4 113
KELLEY R.S. 8180 15.4 10.9 142 24.2 22.4 109
STEEL CREEK PARK 10100 21.9 17.0 129 23.0 17.7 131
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Basin wide percent of average 187 114
UPPER BEAR RIVER
BUG LAKE 7950 24.9 11.0 227 29.0 23.5 124
HAYDEN FORK 9400 13.9 1.7 863* 28.2 24.4 116
KELLEY R.S. 8180 15.4 10.9 142 24.2 22.4 109
LILY LAKE 9050 12.2 6.3 197 24.2 19.4 125
MONTE CRISTO 8960 39.8 22.7 176 37.5 31.7 119
SALT RIVER SUMMIT 7600 12.0 1.7 750 22.4 20.2 111
TRIAL LAKE 9960 28.2 21.5 132 30.7 29.7 104
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Basin wide percent of average 195 115
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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.