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 TUESDAY: MAY 11 , 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 13.7 6.5 211 30.0 26.2 115
COTTONWOOD CREEK 7600 23.2 15.9 147 35.4 29.2 122
GRANITE CREEK 6770 14.5 9.0 161 27.2 27.9 98
GRASSY LAKE 7265 38.8 29.2 133 48.2 43.4 111
GROS VENTRE SUMMIT 8775 -M 11.2 * -M 18.9 *
LEWIS LAKE DIVIDE 7860 37.9 31.0 123 44.8 44.2 102
PHILLIPS BENCH 8200 -M 26.7 * -M 34.8 *
SALT RIVER SUMMIT 7600 -M 3.2 * -M 20.0 *
SNAKE RIVER STATION 6920 11.5 13.0 89 29.4 30.5 97
SPRING CREEK DIVIDE 9000 37.3 27.2 138 35.3 31.9 111
THUMB DIVIDE 7980 -M 12.5 * -M 24.5 *
TOGWOTEE PASS 9580 -M 26.7 * 34.2 33.0 104
TWO OCEAN PLATEAU 9360 41.3 26.7 155 35.8 35.9 100
WILLOW CREEK 8450 31.5 29.0 109 47.0 37.5 126
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Basin wide percent of average 134 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.0 25.4 115 27.5 22.5 123
BLACK BEAR 7950 -M 37.9 * -M 47.9 *
CANYON 7940 12.9 7.8 165 21.2 17.2 124
FISHER CREEK 9100 -M 37.8 * -M 43.8 *
MADISON PLATEAU 7750 -M 20.4 * 36.9 31.0 120
NORTHEAST ENTRANCE 7350 2.9 3.7 81 16.7 14.9 113
PARKER PEAK 9400 -M 23.0 * -M 19.4 *
SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137
THUMB DIVIDE 7980 -M 12.5 * -M 24.5 *
TWO OCEAN PLATEAU 9360 41.3 26.7 155 35.8 35.9 100
WHISKEY CREEK 6800 18.7 11.2 167 28.5 25.9 111
WHITE MILL 8700 30.9 25.4 122 28.9 33.9 85
WOLVERINE 7650 2.9 4.5 65 15.4 16.2 95
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Basin wide percent of average 130 110
WIND RIVER
BURROUGHS CREEK 8750 18.4 8.7 211 22.2 20.5 108
COLD SPRINGS 9630 18.9 4.0 471 23.9 14.1 170
DEER PARK 9700 25.9 -M * 32.8 -M *
HOBBS PARK 10100 29.9 17.4 173 27.9 18.5 151
LITTLE WARM 9620 20.4 7.0 295 24.2 17.4 140
SOUTH PASS 9040 24.5 17.0 145 30.2 21.7 139
ST. LAWRENCE ALT 8620 13.2 3.3 400 21.0 13.4 158
TOGWOTEE PASS 9580 -M 26.7 * 34.2 33.0 104
TOWNSEND CREEK 8700 18.9 7.1 267 25.7 16.7 155
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Basin wide percent of average 224 135
BIGHORN BASIN
BALD MTN. 9375 24.9 24.4 103 24.4 22.4 110
BEAR TRAP MEADOW 7900 1.7 2.3 70 -M 11.7 *
BLACKWATER 9780 35.3 25.2 141 29.4 21.7 136
BONE SPRINGS DIV 9350 21.9 17.2 127 23.7 19.5 122
EVENING STAR 9200 36.8 30.5 121 39.8 27.2 147
GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.7 133
KIRWIN 9550 17.4 10.6 164 20.5 14.4 144
MARQUETTE 8760 17.0 8.0 216 19.5 14.9 132
MIDDLE POWDER 7760 17.7 14.4 124 23.4 16.0 147
OWL CREEK 8975 11.2 1.7 659 14.4 9.0 159
POWDER RIVER PASS 9480 12.1 7.5 162 21.4 16.0 135
SHELL CREEK 9580 19.4 17.0 114 20.4 17.2 119
SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137
SYLVAN ROAD 8120 -M 5.3 * -M 19.7 *
TIMBER CREEK 7950 10.9 3.5 309 16.9 11.4 149
YOUNTS PEAK 8350 21.2 16.7 128 21.7 20.4 107
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Basin wide percent of average 134 132
SHOSHONE RIVER
BLACKWATER 9780 35.3 25.2 141 29.4 21.7 136
EVENING STAR 9200 36.8 30.5 121 39.8 27.2 147
KIRWIN 9550 17.4 10.6 164 20.5 14.4 144
MARQUETTE 8760 17.0 8.0 216 19.5 14.9 132
SYLVAN LAKE 8420 25.4 21.7 118 32.3 23.7 137
SYLVAN ROAD 8120 -M 5.3 * -M 19.7 *
YOUNTS PEAK 8350 21.2 16.7 128 21.7 20.4 107
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Basin wide percent of average 136 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.7 2.3 70 -M 11.7 *
BIG GOOSE 7990 9.9 -M * 18.2 -M *
BONE SPRINGS DIV 9350 21.9 17.2 127 23.7 19.5 122
BURGESS JUNCTION 7880 11.9 11.9 100 17.5 15.5 113
CLOUD PEAK RESERVOIR 9860 24.7 16.7 149 24.9 18.5 135
DOME LAKE 8880 -M 11.7 * 17.7 17.7 100
GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.7 133
HANSEN SAWMILL 8760 4.5 5.0 92 17.2 11.2 154
MIDDLE POWDER 7760 17.7 14.4 124 23.4 16.0 147
POWDER RIVER PASS 9480 12.1 7.5 162 21.4 16.0 135
SUCKER CREEK 8880 14.9 11.5 129 21.4 17.9 121
TIE CREEK 6870 -M -M * -M 15.0 *
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Basin wide percent of average 124 128
BELLE FOURCHE
BLIND PARK 6890 .5 6.1 7 19.2 15.4 125
NORTH RAPID CREEK 6130 .3 -M * 17.2 -M *
WARREN PEAK 6520 1.7 6.1 28 -M 11.4 *
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Basin wide percent of average 18 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.5 16.4 95 29.0 29.2 100
DIVIDE PEAK 8800 19.9 14.5 137 31.7 28.5 111
ELK RIVER 8700 11.2 10.9 104 27.9 22.9 122
JOE WRIGHT 10120 23.5 24.0 98 33.3 31.9 105
NORTH FRENCH CREEK 10100 40.7 27.5 148 40.0 29.4 137
OLD BATTLE 10000 39.8 37.3 107 46.8 37.0 127
SOUTH BRUSH CREEK 8400 9.7 7.3 133 25.7 21.5 120
TOWER 10500 57.3 50.9 113 49.4 45.3 110
WEBBER SPRINGS 9200 20.9 22.2 95 33.8 31.7 107
WILLOW CREEK PASS 9540 15.5 11.5 135 16.0 16.4 97
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Basin wide percent of average 115 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 28.4 26.2 109 31.9 24.9 129
CASPER MTN. 7900 12.9 13.1 98 23.2 20.2 115
DEADMAN HILL 10220 21.7 18.9 115 24.0 22.4 108
DEER PARK 9700 25.9 -M * 32.8 -M *
LAPRELE CREEK 8320 .2 4.3 3 20.7 15.9 132
RENO HILL 8400 14.5 10.0 145 26.4 23.2 115
ROACH 9700 -M 16.7 * 26.0 27.4 96
SAND LAKE 10080 46.3 36.0 129 37.7 26.0 145
SOUTH PASS 9040 24.5 17.0 145 30.2 21.7 139
WINDY PEAK 7840 1.7 4.8 34 18.0 13.5 135
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Basin wide percent of average 115 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .3 1.4 15 23.2 19.4 120
DIVIDE PEAK 8800 19.9 14.5 137 31.7 28.5 111
OLD BATTLE 10000 39.8 37.3 107 46.8 37.0 127
SANDSTONE RS 8150 3.8 4.5 83 26.2 24.0 109
WHISKEY PARK 8950 30.7 26.7 116 37.8 35.4 107
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Basin wide percent of average 112 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.5 11.0 131 18.7 19.2 98
BLIND BULL SUM 8650 32.3 22.5 144 27.4 27.9 99
EAST RIM DIVIDE 7930 14.6 13.5 109 17.7 18.0 99
ELKHART PARK G.S. 9400 -M 11.1 * -M 18.9 *
GROS VENTRE SUMMIT 8775 -M 11.2 * -M 18.9 *
KENDALL R.S. 7740 10.2 3.2 330 19.7 18.4 108
LOOMIS PARK 8240 -M 12.5 * 24.5 22.2 111
NEW FORK LAKE 8340 11.2 7.1 158 16.0 17.2 93
SNIDER BASIN 8250 -M 9.9 * -M 17.9 *
SPRING CREEK DIVIDE 9000 37.3 27.2 138 35.3 31.9 111
TRIPLE PEAK 8500 -M 22.4 * -M 36.3 *
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Basin wide percent of average 143 104
LOWER GREEN RIVER
HAMS FORK 7840 7.5 1.7 436 18.2 15.9 115
HEWINTA 9500 12.7 1.7 794 19.2 17.2 112
HICKERSON PARK 9150 5.6 1.4 431 14.5 13.4 109
HOLE-IN-ROCK 9150 8.6 1.2 782 14.7 13.4 111
INDIAN CREEK 9425 -M 26.2 * -M 30.2 *
KELLEY R.S. 8180 15.5 11.5 134 24.0 22.2 109
STEEL CREEK PARK 10100 21.5 17.4 125 22.9 17.4 133
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Basin wide percent of average 207 115
UPPER BEAR RIVER
BUG LAKE 7950 -M 11.9 * -M 23.4 *
HAYDEN FORK 9400 14.5 2.4 601 27.2 24.2 113
KELLEY R.S. 8180 15.5 11.5 134 24.0 22.2 109
LILY LAKE 9050 13.1 6.6 199 24.2 19.2 127
MONTE CRISTO 8960 38.8 23.2 168 36.8 31.4 117
SALT RIVER SUMMIT 7600 -M 3.2 * -M 20.0 *
TRIAL LAKE 9960 28.2 21.9 129 30.5 29.4 104
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Basin wide percent of average 168 113
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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.