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 27 , 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 2.4 1.5 161* 30.9 27.5 113
COTTONWOOD CREEK 7600 12.5 4.3 296 36.8 30.7 120
GRANITE CREEK 6770 4.8 3.4 142 28.0 29.4 96
GRASSY LAKE 7265 27.9 16.5 169 49.8 45.7 110
GROS VENTRE SUMMIT 8775 10.9 3.0 361 20.4 19.9 104
LEWIS LAKE DIVIDE 7860 31.9 22.7 141 46.3 46.4 100
PHILLIPS BENCH 8200 24.5 19.9 124 37.4 36.7 103
SALT RIVER SUMMIT 7600 .5 .0 * 23.2 21.2 110
SNAKE RIVER STATION 6920 .2 3.4 3 30.4 32.0 95
SPRING CREEK DIVIDE 9000 30.0 21.2 143 36.3 33.4 109
THUMB DIVIDE 7980 8.5 3.3 258 28.2 25.7 110
TOGWOTEE PASS 9580 -M 24.4 * 35.8 34.8 103
TWO OCEAN PLATEAU 9360 37.0 23.7 157 37.3 37.9 99
WILLOW CREEK 8450 22.2 21.9 102 49.2 39.4 125
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Basin wide percent of average 147 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 24.5 21.2 117 28.4 24.4 116
BLACK BEAR 7950 54.0 30.4 179 60.3 50.0 121
CANYON 7940 5.5 3.0 181 22.9 18.5 124
FISHER CREEK 9100 39.8 33.4 119 44.3 46.3 96
MADISON PLATEAU 7750 -M 11.0 * 39.3 32.8 120
NORTHEAST ENTRANCE 7350 .0 1.0 0* 18.2 16.2 113
PARKER PEAK 9400 19.9 19.9 100 -M 21.0 *
SYLVAN LAKE 8420 22.9 16.2 142 36.3 25.7 142
THUMB DIVIDE 7980 8.5 3.3 258 28.2 25.7 110
TWO OCEAN PLATEAU 9360 37.0 23.7 157 37.3 37.9 99
WHISKEY CREEK 6800 10.6 3.8 287 30.4 27.2 112
WHITE MILL 8700 26.4 21.2 125 30.4 36.0 85
WOLVERINE 7650 .0 .0 0* 15.5 17.7 88
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Basin wide percent of average 141 110
WIND RIVER
BURROUGHS CREEK 8750 12.9 3.5 366 23.7 22.0 108
COLD SPRINGS 9630 11.9 1.2 1073 25.4 15.7 162
DEER PARK 9700 23.2 -M * 34.2 -M *
HOBBS PARK 10100 24.2 11.6 209 29.4 20.4 145
LITTLE WARM 9620 12.4 2.2 586 25.2 18.9 134
SOUTH PASS 9040 18.0 12.0 150 31.4 23.5 134
ST. LAWRENCE ALT 8620 3.0 .9 375 22.0 14.5 152
TOGWOTEE PASS 9580 -M 24.4 * 35.8 34.8 103
TOWNSEND CREEK 8700 10.4 3.2 333 26.7 18.2 147
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Basin wide percent of average 271 131
BIGHORN BASIN
BALD MTN. 9375 23.0 20.4 114 26.2 24.7 107
BEAR TRAP MEADOW 7900 .7 .5 140* 18.9 13.5 142
BLACKWATER 9780 31.5 20.7 153 31.4 23.5 134
BONE SPRINGS DIV 9350 19.2 10.7 180 26.4 21.7 123
EVENING STAR 9200 32.2 27.0 119 41.2 29.4 141
GRAVE SPRINGS 8550 2.7 4.8 56 19.7 15.6 127
KIRWIN 9550 13.7 6.6 208 21.7 15.9 138
MARQUETTE 8760 15.1 5.3 291 22.2 16.7 133
MIDDLE POWDER 7760 9.0 6.0 153 23.2 17.7 132
OWL CREEK 8975 4.5 .5 1101* 16.0 10.4 155
POWDER RIVER PASS 9480 7.3 2.8 258 23.4 17.7 132
SHELL CREEK 9580 16.0 13.0 123 21.5 19.2 112
SYLVAN LAKE 8420 22.9 16.2 142 36.3 25.7 142
SYLVAN ROAD 8120 1.0 1.9 53 22.5 21.4 106
TIMBER CREEK 7950 5.5 .0 601 18.4 13.2 140
YOUNTS PEAK 8350 16.9 11.1 152 22.9 21.9 105
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Basin wide percent of average 150 128
SHOSHONE RIVER
BLACKWATER 9780 31.5 20.7 153 31.4 23.5 134
EVENING STAR 9200 32.2 27.0 119 41.2 29.4 141
KIRWIN 9550 13.7 6.6 208 21.7 15.9 138
MARQUETTE 8760 15.1 5.3 291 22.2 16.7 133
SYLVAN LAKE 8420 22.9 16.2 142 36.3 25.7 142
SYLVAN ROAD 8120 1.0 1.9 53 22.5 21.4 106
YOUNTS PEAK 8350 16.9 11.1 152 22.9 21.9 105
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Basin wide percent of average 151 129
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .7 .5 140* 18.9 13.5 142
BIG GOOSE 7990 4.3 -M * 19.9 -M *
BONE SPRINGS DIV 9350 19.2 10.7 180 26.4 21.7 123
BURGESS JUNCTION 7880 7.0 5.0 141 18.9 17.2 110
CLOUD PEAK RESERVOIR 9860 19.4 10.6 184 26.2 20.7 127
DOME LAKE 8880 -M 5.8 * 18.7 19.7 95
GRAVE SPRINGS 8550 2.7 4.8 56 19.7 15.6 127
HANSEN SAWMILL 8760 .0 1.9 0 18.2 12.6 144
MIDDLE POWDER 7760 9.0 6.0 153 23.2 17.7 132
POWDER RIVER PASS 9480 7.3 2.8 258 23.4 17.7 132
SUCKER CREEK 8880 10.5 6.0 174 23.4 19.9 118
TIE CREEK 6870 .3 -M * 19.4 16.5 118
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Basin wide percent of average 158 123
BELLE FOURCHE
BLIND PARK 6890 .0 1.4 0 21.5 17.5 123
NORTH RAPID CREEK 6130 .0 -M * 18.9 -M *
WARREN PEAK 6520 .0 1.5 0 -M 13.0 *
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Basin wide percent of average 0 123*
UPPER N. PLATTE RIVER
COLUMBINE 9400 .0 6.1 0 30.4 30.5 100
DIVIDE PEAK 8800 7.0 5.8 119 32.8 30.4 108
ELK RIVER 8700 .0 2.8 0 30.2 24.2 125
JOE WRIGHT 10120 19.4 19.2 102 34.8 34.3 102
NORTH FRENCH CREEK 10100 37.0 22.2 167 39.9 31.7 126
OLD BATTLE 10000 36.3 27.9 131 49.3 39.0 127
SOUTH BRUSH CREEK 8400 7.0 2.5 281 27.4 22.9 120
TOWER 10500 47.3 46.3 103 51.0 48.5 106
WEBBER SPRINGS 9200 10.4 13.5 77 35.5 33.3 107
WILLOW CREEK PASS 9540 8.1 4.8 169 17.4 17.9 98
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Basin wide percent of average 115 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.4 16.4 131 33.5 26.7 126
CASPER MTN. 7900 .3 5.8 6 24.2 22.4 109
DEADMAN HILL 10220 15.9 12.7 125 25.4 24.2 105
DEER PARK 9700 23.2 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 1.9 0 22.9 17.7 130
RENO HILL 8400 2.0 4.6 44 27.5 24.0 115
ROACH 9700 -M 10.0 * 26.9 29.5 92
SAND LAKE 10080 46.3 27.9 167 41.4 27.9 149
SOUTH PASS 9040 18.0 12.0 150 31.4 23.5 134
WINDY PEAK 7840 .0 1.2 0 19.7 15.2 129
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Basin wide percent of average 127 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 24.0 20.7 117
DIVIDE PEAK 8800 7.0 5.8 119 32.8 30.4 108
OLD BATTLE 10000 36.3 27.9 131 49.3 39.0 127
SANDSTONE RS 8150 .0 .7 0* 27.2 25.7 107
WHISKEY PARK 8950 -M 16.0 * 39.7 37.8 106
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Basin wide percent of average 126* 113
UPPER GREEN RIVER
BIG SANDY OPENING 9100 6.6 2.9 228 20.0 20.4 99
BLIND BULL SUM 8650 32.3 18.2 177 28.7 29.2 99
EAST RIM DIVIDE 7930 8.4 8.7 96 18.4 18.9 98
ELKHART PARK G.S. 9400 8.7 6.0 145 20.0 19.9 101
GROS VENTRE SUMMIT 8775 10.9 3.0 361 20.4 19.9 104
KENDALL R.S. 7740 .2 .0 * 20.5 19.4 106
LOOMIS PARK 8240 -M 3.4 * 25.4 23.5 109
NEW FORK LAKE 8340 1.4 1.9 69 17.4 18.0 97
SNIDER BASIN 8250 6.6 2.5 265 23.2 18.9 123
SPRING CREEK DIVIDE 9000 30.0 21.2 143 36.3 33.4 109
TRIPLE PEAK 8500 19.0 16.7 114 39.4 38.3 104
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Basin wide percent of average 153 104
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 18.5 16.7 111
HEWINTA 9500 2.4 .0 * 20.5 18.7 111
HICKERSON PARK 9150 .0 .3 0* 16.0 14.9 109
HOLE-IN-ROCK 9150 .0 .3 0* 16.0 14.9 108
INDIAN CREEK 9425 30.4 19.7 154 35.0 31.9 110
KELLEY R.S. 8180 5.1 3.0 170 24.9 23.4 106
STEEL CREEK PARK 10100 19.4 13.5 145 24.9 19.4 129
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Basin wide percent of average 150* 112
UPPER BEAR RIVER
BUG LAKE 7950 10.9 4.6 235 29.7 24.7 121
HAYDEN FORK 9400 3.5 .3 1167* 29.4 25.7 115
KELLEY R.S. 8180 5.1 3.0 170 24.9 23.4 106
LILY LAKE 9050 -M 2.4 * -M 20.7 *
MONTE CRISTO 8960 30.0 13.5 224 38.5 33.3 116
SALT RIVER SUMMIT 7600 .5 .0 * 23.2 21.2 110
TRIAL LAKE 9960 20.2 14.7 138 31.9 31.2 103
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Basin wide percent of average 194 112
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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.