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 SATURDAY: MAY 22 , 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 8.5 2.9 290 30.9 27.2 115
COTTONWOOD CREEK 7600 19.9 8.4 239 36.7 30.2 122
GRANITE CREEK 6770 10.1 5.0 203 27.9 28.9 97
GRASSY LAKE 7265 38.0 21.0 181 49.9 44.9 112
GROS VENTRE SUMMIT 8775 14.6 6.0 244 20.4 19.5 105
LEWIS LAKE DIVIDE 7860 37.5 25.7 147 46.3 45.8 102
PHILLIPS BENCH 8200 30.7 22.2 138 37.3 36.0 104
SALT RIVER SUMMIT 7600 6.5 .0 * 22.9 20.7 111
SNAKE RIVER STATION 6920 6.8 6.8 100 30.4 31.5 97
SPRING CREEK DIVIDE 9000 36.9 23.2 160 36.3 32.9 111
THUMB DIVIDE 7980 15.5 6.6 235 28.0 25.4 111
TOGWOTEE PASS 9580 -M 25.2 * 35.8 34.3 105
TWO OCEAN PLATEAU 9360 40.4 24.9 163 37.2 37.3 100
WILLOW CREEK 8450 30.9 24.4 127 49.0 38.8 127
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Basin wide percent of average 164 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.4 22.7 121 28.2 23.9 119
BLACK BEAR 7950 58.2 33.2 176 60.3 49.3 123
CANYON 7940 10.5 4.5 234 22.9 18.2 126
FISHER CREEK 9100 39.7 35.2 113 43.9 45.5 97
MADISON PLATEAU 7750 -M 14.4 * 39.3 32.3 122
NORTHEAST ENTRANCE 7350 .0 1.7 0 17.9 15.7 114
PARKER PEAK 9400 25.7 21.2 122 -M 20.5 *
SYLVAN LAKE 8420 -M 18.0 * 33.9 25.2 136
THUMB DIVIDE 7980 15.5 6.6 235 28.0 25.4 111
TWO OCEAN PLATEAU 9360 40.4 24.9 163 37.2 37.3 100
WHISKEY CREEK 6800 16.2 6.1 264 30.2 26.9 113
WHITE MILL 8700 29.2 22.7 129 30.2 35.4 86
WOLVERINE 7650 .0 1.9 0 15.2 17.2 89
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Basin wide percent of average 146 110
WIND RIVER
BURROUGHS CREEK 8750 17.2 5.0 352 23.5 21.5 110
COLD SPRINGS 9630 16.0 1.9 884 24.9 15.2 164
DEER PARK 9700 25.5 -M * 34.2 -M *
HOBBS PARK 10100 30.9 13.9 224 29.2 19.9 148
LITTLE WARM 9620 17.5 3.5 500 25.2 18.4 137
SOUTH PASS 9040 22.0 14.0 159 31.2 23.0 136
ST. LAWRENCE ALT 8620 9.0 1.5 594 21.7 14.1 154
TOGWOTEE PASS 9580 -M 25.2 * 35.8 34.3 105
TOWNSEND CREEK 8700 15.5 4.5 353 26.7 17.7 151
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Basin wide percent of average 293 133
BIGHORN BASIN
BALD MTN. 9375 25.4 22.0 116 26.2 23.9 110
BEAR TRAP MEADOW 7900 .9 .0 89 18.2 13.0 142
BLACKWATER 9780 35.0 22.4 157 31.2 23.0 136
BONE SPRINGS DIV 9350 22.4 13.2 170 25.9 20.9 124
EVENING STAR 9200 35.0 28.4 124 41.2 28.7 144
GRAVE SPRINGS 8550 7.8 7.3 107 19.0 15.0 127
KIRWIN 9550 17.2 8.1 213 21.7 15.4 142
MARQUETTE 8760 18.4 6.3 297 22.0 16.2 137
MIDDLE POWDER 7760 14.7 9.4 159 22.9 17.2 134
OWL CREEK 8975 8.5 .7 1215 15.5 10.0 157
POWDER RIVER PASS 9480 11.5 4.3 272 22.9 17.2 134
SHELL CREEK 9580 19.4 14.7 132 21.4 18.7 116
SYLVAN LAKE 8420 -M 18.0 * 33.9 25.2 136
SYLVAN ROAD 8120 -M 2.8 * -M 20.9 *
TIMBER CREEK 7950 9.2 1.7 575 18.4 12.6 147
YOUNTS PEAK 8350 20.0 13.1 153 22.9 21.4 107
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Basin wide percent of average 162 131
SHOSHONE RIVER
BLACKWATER 9780 35.0 22.4 157 31.2 23.0 136
EVENING STAR 9200 35.0 28.4 124 41.2 28.7 144
KIRWIN 9550 17.2 8.1 213 21.7 15.4 142
MARQUETTE 8760 18.4 6.3 297 22.0 16.2 137
SYLVAN LAKE 8420 -M 18.0 * 33.9 25.2 136
SYLVAN ROAD 8120 -M 2.8 * -M 20.9 *
YOUNTS PEAK 8350 20.0 13.1 153 22.9 21.4 107
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Basin wide percent of average 161 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 .0 89 18.2 13.0 142
BIG GOOSE 7990 8.2 -M * 19.7 -M *
BONE SPRINGS DIV 9350 22.4 13.2 170 25.9 20.9 124
BURGESS JUNCTION 7880 10.7 7.5 143 18.9 16.7 114
CLOUD PEAK RESERVOIR 9860 23.0 13.0 179 25.9 20.0 130
DOME LAKE 8880 -M 7.8 * 18.7 19.0 98
GRAVE SPRINGS 8550 7.8 7.3 107 19.0 15.0 127
HANSEN SAWMILL 8760 .3 2.8 12 18.0 12.2 148
MIDDLE POWDER 7760 14.7 9.4 159 22.9 17.2 134
POWDER RIVER PASS 9480 11.5 4.3 272 22.9 17.2 134
SUCKER CREEK 8880 14.5 8.0 183 23.4 19.4 121
TIE CREEK 6870 1.5 -M * 19.4 16.0 122
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Basin wide percent of average 161 126
BELLE FOURCHE
BLIND PARK 6890 .2 2.8 4 20.9 16.9 125
NORTH RAPID CREEK 6130 .0 -M * 17.9 -M *
WARREN PEAK 6520 .0 2.8 0 -M 12.5 *
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Basin wide percent of average 2 125*
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.3 9.5 66 30.2 30.0 101
DIVIDE PEAK 8800 14.4 8.6 167 32.8 29.7 111
ELK RIVER 8700 3.8 5.1 75 29.9 23.9 126
JOE WRIGHT 10120 22.2 21.0 106 34.4 33.5 103
NORTH FRENCH CREEK 10100 41.7 24.2 173 40.0 31.0 130
OLD BATTLE 10000 39.3 31.7 125 48.7 38.4 127
SOUTH BRUSH CREEK 8400 8.5 3.9 218 27.4 22.5 122
TOWER 10500 -M 48.3 * -M 47.5 *
WEBBER SPRINGS 9200 16.0 16.4 98 35.3 32.8 108
WILLOW CREEK PASS 9540 12.0 7.3 165 16.9 17.4 98
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Basin wide percent of average 129 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.4 20.0 127 33.0 26.2 127
CASPER MTN. 7900 5.8 8.1 72 23.9 21.7 111
DEADMAN HILL 10220 19.0 15.2 126 24.9 23.5 106
DEER PARK 9700 25.5 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 2.5 0 21.9 17.2 128
RENO HILL 8400 8.2 6.3 131 27.2 23.7 115
ROACH 9700 -M 12.5 * 26.9 28.9 94
SAND LAKE 10080 46.3 31.0 150 39.5 27.4 145
SOUTH PASS 9040 22.0 14.0 159 31.2 23.0 136
WINDY PEAK 7840 .0 2.2 0 19.2 14.6 132
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Basin wide percent of average 128 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 24.0 20.2 119
DIVIDE PEAK 8800 14.4 8.6 167 32.8 29.7 111
OLD BATTLE 10000 39.3 31.7 125 48.7 38.4 127
SANDSTONE RS 8150 .0 1.4 0* 27.0 25.2 108
WHISKEY PARK 8950 28.2 19.9 142 39.7 37.0 108
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Basin wide percent of average 133 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 11.6 5.8 200 19.7 20.0 99
BLIND BULL SUM 8650 32.8 20.0 164 28.7 28.7 100
EAST RIM DIVIDE 7930 12.4 10.5 119 18.4 18.7 99
ELKHART PARK G.S. 9400 13.7 7.6 181 19.9 19.7 102
GROS VENTRE SUMMIT 8775 14.6 6.0 244 20.4 19.5 105
KENDALL R.S. 7740 5.5 .0 * 20.5 19.2 108
LOOMIS PARK 8240 -M 6.8 * 25.4 23.2 110
NEW FORK LAKE 8340 7.0 3.8 187 16.9 17.7 95
SNIDER BASIN 8250 12.4 5.0 247 23.2 18.7 125
SPRING CREEK DIVIDE 9000 36.9 23.2 160 36.3 32.9 111
TRIPLE PEAK 8500 26.7 18.7 144 39.3 37.7 105
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Basin wide percent of average 168 106
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 * 18.4 16.4 113
HEWINTA 9500 9.5 .0 * 20.5 18.2 113
HICKERSON PARK 9150 .9 .5 200* 15.5 14.4 108
HOLE-IN-ROCK 9150 2.9 .5 725* 16.0 14.4 112
INDIAN CREEK 9425 35.5 21.9 163 34.9 31.4 112
KELLEY R.S. 8180 11.1 6.0 189 24.7 23.0 108
STEEL CREEK PARK 10100 22.9 14.9 155 24.7 18.7 132
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Basin wide percent of average 169* 114
UPPER BEAR RIVER
BUG LAKE 7950 18.2 7.0 263 29.7 24.2 123
HAYDEN FORK 9400 9.4 .5 1861* 29.4 25.2 117
KELLEY R.S. 8180 11.1 6.0 189 24.7 23.0 108
LILY LAKE 9050 9.1 3.8 240 25.5 20.2 127
MONTE CRISTO 8960 38.0 17.0 224 38.5 32.8 118
SALT RIVER SUMMIT 7600 6.5 .0 * 22.9 20.7 111
TRIAL LAKE 9960 26.0 17.4 151 31.7 30.7 103
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Basin wide percent of average 218 115
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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.