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 25 , 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 5.0 2.0 250 30.9 27.4 113
COTTONWOOD CREEK 7600 15.2 5.8 263 36.8 30.5 121
GRANITE CREEK 6770 7.0 4.1 171 27.9 29.2 96
GRASSY LAKE 7265 31.5 18.4 173 49.9 45.4 110
GROS VENTRE SUMMIT 8775 12.2 4.3 291 20.4 19.7 104
LEWIS LAKE DIVIDE 7860 34.3 23.9 144 46.3 46.2 101
PHILLIPS BENCH 8200 27.0 20.9 130 37.4 36.4 103
SALT RIVER SUMMIT 7600 1.2 .0 * 23.0 21.0 110
SNAKE RIVER STATION 6920 2.4 4.8 50 30.4 31.9 95
SPRING CREEK DIVIDE 9000 32.8 21.9 150 36.3 33.3 110
THUMB DIVIDE 7980 11.2 4.8 239 28.0 25.7 110
TOGWOTEE PASS 9580 -M 24.7 * 35.8 34.7 104
TWO OCEAN PLATEAU 9360 38.7 24.2 161 37.3 37.7 99
WILLOW CREEK 8450 25.2 22.9 111 49.0 39.3 125
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Basin wide percent of average 154 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.4 21.7 117 28.2 24.2 117
BLACK BEAR 7950 56.2 31.5 179 60.3 49.8 122
CANYON 7940 7.5 3.7 206 22.9 18.4 125
FISHER CREEK 9100 -M 34.2 * 44.0 46.0 96
MADISON PLATEAU 7750 -M 12.2 * 39.3 32.7 121
NORTHEAST ENTRANCE 7350 .0 1.2 0 17.9 16.0 112
PARKER PEAK 9400 22.0 20.4 109 -M 20.9 *
SYLVAN LAKE 8420 -M 16.9 * 38.2 25.4 151
THUMB DIVIDE 7980 11.2 4.8 239 28.0 25.7 110
TWO OCEAN PLATEAU 9360 38.7 24.2 161 37.3 37.7 99
WHISKEY CREEK 6800 12.5 4.8 266 30.4 27.0 113
WHITE MILL 8700 27.2 21.7 126 30.2 35.8 85
WOLVERINE 7650 .0 1.4 0 15.2 17.5 87
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Basin wide percent of average 149 111
WIND RIVER
BURROUGHS CREEK 8750 14.5 4.1 354 23.7 21.9 108
COLD SPRINGS 9630 13.1 1.4 936 24.9 15.5 161
DEER PARK 9700 24.0 -M * 34.3 -M *
HOBBS PARK 10100 25.5 12.5 205 29.2 20.2 146
LITTLE WARM 9620 14.0 2.8 519 25.2 18.7 135
SOUTH PASS 9040 19.7 12.7 155 31.4 23.4 135
ST. LAWRENCE ALT 8620 5.1 1.2 464 21.7 14.4 152
TOGWOTEE PASS 9580 -M 24.7 * 35.8 34.7 104
TOWNSEND CREEK 8700 12.4 3.7 342 26.9 18.0 149
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Basin wide percent of average 274 132
BIGHORN BASIN
BALD MTN. 9375 24.0 21.0 115 26.2 24.4 108
BEAR TRAP MEADOW 7900 .7 .6 117* 18.4 13.2 139
BLACKWATER 9780 31.7 21.4 149 31.4 23.4 135
BONE SPRINGS DIV 9350 21.2 11.7 181 26.2 21.4 124
EVENING STAR 9200 33.3 27.5 121 41.2 29.0 142
GRAVE SPRINGS 8550 4.5 5.8 78 19.0 15.5 124
KIRWIN 9550 15.0 7.3 207 21.7 15.6 140
MARQUETTE 8760 16.2 5.6 290 22.0 16.5 134
MIDDLE POWDER 7760 11.6 7.3 159 22.9 17.5 131
OWL CREEK 8975 6.0 .5 1200 15.6 10.2 153
POWDER RIVER PASS 9480 8.5 3.4 251 23.0 17.5 132
SHELL CREEK 9580 17.9 13.6 131 21.5 19.0 114
SYLVAN LAKE 8420 -M 16.9 * 38.2 25.4 151
SYLVAN ROAD 8120 -M 2.3 * -M 21.2 *
TIMBER CREEK 7950 6.8 1.2 567 18.4 13.0 142
YOUNTS PEAK 8350 18.4 12.0 155 22.9 21.7 106
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Basin wide percent of average 156 131
SHOSHONE RIVER
BLACKWATER 9780 31.7 21.4 149 31.4 23.4 135
EVENING STAR 9200 33.3 27.5 121 41.2 29.0 142
KIRWIN 9550 15.0 7.3 207 21.7 15.6 140
MARQUETTE 8760 16.2 5.6 290 22.0 16.5 134
SYLVAN LAKE 8420 -M 16.9 * 38.2 25.4 151
SYLVAN ROAD 8120 -M 2.3 * -M 21.2 *
YOUNTS PEAK 8350 18.4 12.0 155 22.9 21.7 106
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Basin wide percent of average 156 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .7 .6 117* 18.4 13.2 139
BIG GOOSE 7990 5.8 -M * 19.9 -M *
BONE SPRINGS DIV 9350 21.2 11.7 181 26.2 21.4 124
BURGESS JUNCTION 7880 8.5 6.0 141 18.9 17.0 112
CLOUD PEAK RESERVOIR 9860 21.2 11.6 182 26.0 20.4 128
DOME LAKE 8880 -M 6.6 * 18.7 19.4 96
GRAVE SPRINGS 8550 4.5 5.8 78 19.0 15.5 124
HANSEN SAWMILL 8760 .0 2.3 0 18.0 12.5 146
MIDDLE POWDER 7760 11.6 7.3 159 22.9 17.5 131
POWDER RIVER PASS 9480 8.5 3.4 251 23.0 17.5 132
SUCKER CREEK 8880 12.2 6.8 183 23.4 19.7 120
TIE CREEK 6870 .3 -M * 19.4 16.4 120
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Basin wide percent of average 160 123
BELLE FOURCHE
BLIND PARK 6890 .0 1.9 0 21.4 17.4 124
NORTH RAPID CREEK 6130 .0 -M * 18.2 -M *
WARREN PEAK 6520 .0 2.0 0 -M 12.7 *
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Basin wide percent of average 0 124*
UPPER N. PLATTE RIVER
COLUMBINE 9400 1.5 7.5 21 30.2 30.4 100
DIVIDE PEAK 8800 9.6 7.0 140 32.7 30.2 109
ELK RIVER 8700 .0 3.8 0 29.9 24.0 125
JOE WRIGHT 10120 20.4 19.9 103 34.4 33.9 102
NORTH FRENCH CREEK 10100 38.4 22.9 168 39.9 31.4 128
OLD BATTLE 10000 37.2 29.4 127 49.2 38.8 127
SOUTH BRUSH CREEK 8400 7.0 3.2 226 27.2 22.7 120
TOWER 10500 47.7 47.2 102 51.0 48.0 107
WEBBER SPRINGS 9200 12.4 14.6 85 35.5 33.2 108
WILLOW CREEK PASS 9540 9.4 5.8 161 17.2 17.7 97
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Basin wide percent of average 114 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.9 17.9 124 33.3 26.4 126
CASPER MTN. 7900 1.5 6.8 23 23.9 22.0 109
DEADMAN HILL 10220 16.5 13.7 121 25.0 23.9 105
DEER PARK 9700 24.0 -M * 34.3 -M *
LAPRELE CREEK 8320 .0 2.0 0 22.0 17.4 127
RENO HILL 8400 3.8 5.3 72 27.2 23.9 114
ROACH 9700 -M 11.0 * 26.9 29.4 92
SAND LAKE 10080 46.3 29.2 159 40.0 27.7 145
SOUTH PASS 9040 19.7 12.7 155 31.4 23.4 135
WINDY PEAK 7840 .0 1.5 0 19.2 15.0 128
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Basin wide percent of average 124 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 23.9 20.4 118
DIVIDE PEAK 8800 9.6 7.0 140 32.7 30.2 109
OLD BATTLE 10000 37.2 29.4 127 49.2 38.8 127
SANDSTONE RS 8150 .0 1.0 0* 27.0 25.4 107
WHISKEY PARK 8950 -M 17.5 * 39.7 37.4 106
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Basin wide percent of average 126* 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.4 4.1 203 20.0 20.2 100
BLIND BULL SUM 8650 32.8 18.9 174 28.7 29.0 99
EAST RIM DIVIDE 7930 10.0 9.5 107 18.4 18.9 98
ELKHART PARK G.S. 9400 10.5 6.8 157 19.9 19.9 101
GROS VENTRE SUMMIT 8775 12.2 4.3 291 20.4 19.7 104
KENDALL R.S. 7740 1.5 .0 * 20.5 19.4 107
LOOMIS PARK 8240 -M 4.8 * 25.4 23.4 110
NEW FORK LAKE 8340 3.4 2.7 131 17.2 17.9 97
SNIDER BASIN 8250 8.9 3.5 252 23.2 18.9 124
SPRING CREEK DIVIDE 9000 32.8 21.9 150 36.3 33.3 110
TRIPLE PEAK 8500 22.2 17.4 128 39.3 38.0 104
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Basin wide percent of average 159 105
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 18.5 16.7 112
HEWINTA 9500 5.3 .0 * 20.4 18.4 111
HICKERSON PARK 9150 .2 .3 34* 15.9 14.6 109
HOLE-IN-ROCK 9150 .0 .3 0* 16.0 14.6 109
INDIAN CREEK 9425 32.2 20.5 157 34.9 31.7 111
KELLEY R.S. 8180 7.3 4.3 172 24.9 23.4 107
STEEL CREEK PARK 10100 20.7 14.0 149 24.9 19.0 131
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Basin wide percent of average 154* 113
UPPER BEAR RIVER
BUG LAKE 7950 13.6 5.6 243 29.7 24.4 122
HAYDEN FORK 9400 5.3 .3 1767* 29.5 25.5 116
KELLEY R.S. 8180 7.3 4.3 172 24.9 23.4 107
LILY LAKE 9050 5.0 3.0 164 25.5 20.5 125
MONTE CRISTO 8960 32.8 14.9 222 38.5 33.0 117
SALT RIVER SUMMIT 7600 1.2 .0 * 23.0 21.0 110
TRIAL LAKE 9960 22.7 15.9 144 31.7 31.0 103
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Basin wide percent of average 198 114
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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.