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 21 , 2011
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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 15.5 3.8 408 34.1 26.1 131
COTTONWOOD CREEK 7670 31.8 11.0 289 48.0 34.6 139
GRAND TARGHEE 9260 68.2 -M * -M -M *
GRANITE CREEK 6770 17.6 5.4 326 33.1 24.0 138
GRASSY LAKE 7265 39.5 22.7 174 55.2 43.6 127
GROS VENTRE SUMMIT 8750 18.6 7.9 235 22.7 16.8 135
GUNSIGHT PASS 9820 -M -M * 26.5 -M *
LEWIS LAKE DIVIDE 7850 49.6 25.5 195 49.4 44.2 112
PHILLIPS BENCH 8200 40.2 20.8 193 45.8 35.5 129
SALT RIVER SUMMIT 7760 13.1 2.0 655 28.3 23.3 121
SNAKE RIVER STATION 6920 -M 2.6 * 35.4 27.4 129
SPRING CREEK DIVIDE 9000 42.7 21.7 197 42.5 32.2 132
THUMB DIVIDE 7980 18.6 7.1 262 28.7 23.9 120
TOGWOTEE PASS 9580 41.5 26.0 160 43.6 31.5 138
TWO OCEAN PLATEAU 9240 52.0 29.3 177 43.4 34.9 124
WILLOW CREEK 8380 43.1 21.9 197 56.0 41.1 136
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Basin wide percent of average 207 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.7 24.2 139 34.5 25.9 133
BLACK BEAR 8170 51.7 33.9 153 58.5 48.8 120
CANYON 7870 16.1 4.7 343 25.0 19.5 128
FISHER CREEK 9100 53.3 34.5 154 53.7 45.1 119
MADISON PLATEAU 7750 31.0 16.3 190 41.3 32.9 126
NORTHEAST ENTRANCE 7350 5.3 1.6 331 21.9 16.6 132
PARKER PEAK 9400 38.3 22.8 168 38.2 21.9 174
SYLVAN LAKE 8420 27.7 17.6 157 38.9 27.4 142
THUMB DIVIDE 7980 18.6 7.1 262 28.7 23.9 120
TWO OCEAN PLATEAU 9240 52.0 29.3 177 43.4 34.9 124
WHISKEY CREEK 6800 15.9 6.6 241 30.8 26.2 118
WHITE MILL 8700 36.6 23.0 159 38.8 33.8 115
WOLVERINE 7650 7.4 1.5 493 20.0 17.3 116
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Basin wide percent of average 174 127
WIND RIVER
BURROUGHS CREEK 8750 21.9 8.2 267 26.5 21.5 123
CASTLE CREEK 8400 .3 -M * 13.1 -M *
COLD SPRINGS 9630 11.5 2.0 575 18.1 16.1 112
DEER PARK 9700 23.7 15.9 149 30.7 29.7 103
HOBBS PARK 10100 24.2 15.1 160 24.3 19.7 123
LITTLE WARM 9370 -M 5.4 * 20.8 19.0 109
SOUTH PASS 9040 19.9 11.0 181 22.8 25.1 91
ST. LAWRENCE ALT 8620 4.4 1.9 232 17.4 14.3 122
TOGWOTEE PASS 9580 41.5 26.0 160 43.6 31.5 138
TOWNSEND CREEK 8700 8.6 3.9 221 19.8 17.8 111
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Basin wide percent of average 185 115
BIGHORN BASIN
BALD MTN. 9380 -M 21.6 * 29.6 24.1 123
BEAR TRAP MEADOW 8200 10.3 .0 * 16.3 13.1 124
BLACKWATER 9780 39.8 28.5 140 38.4 27.4 140
BONE SPRINGS DIV 9350 -M 14.0 * 26.4 21.0 126
EVENING STAR 9200 40.4 31.0 130 47.4 32.8 145
GRAVE SPRINGS 8550 12.9 4.4 293 16.6 15.2 109
KIRWIN 9550 18.7 9.7 193 22.4 16.4 137
MARQUETTE 8760 13.6 -M * 17.8 16.6 107
MIDDLE POWDER 7760 -M 7.9 * 17.3 18.1 96
OWL CREEK 8975 4.2 1.4 300 12.1 10.1 120
POWDER RIVER PASS 9480 21.4 5.8 369 27.2 18.4 148
SHELL CREEK 9580 26.2 14.8 177 -M 19.3 *
SYLVAN LAKE 8420 27.7 17.6 157 38.9 27.4 142
SYLVAN ROAD 7120 3.5 1.1 318* 29.0 22.4 129
TIMBER CREEK 7950 5.2 1.5 347 14.0 13.2 106
YOUNTS PEAK 8350 22.8 13.0 175 24.2 20.9 116
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Basin wide percent of average 181 127
SHOSHONE RIVER
BLACKWATER 9780 39.8 28.5 140 38.4 27.4 140
EVENING STAR 9200 40.4 31.0 130 47.4 32.8 145
KIRWIN 9550 18.7 9.7 193 22.4 16.4 137
MARQUETTE 8760 13.6 -M * 17.8 16.6 107
SYLVAN LAKE 8420 27.7 17.6 157 38.9 27.4 142
SYLVAN ROAD 7120 3.5 1.1 318* 29.0 22.4 129
YOUNTS PEAK 8350 22.8 13.0 175 24.2 20.9 116
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Basin wide percent of average 152 133
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.3 .0 * 16.3 13.1 124
BIG GOOSE 7990 -M 7.6 * 20.4 15.4 132
BONE SPRINGS DIV 9350 -M 14.0 * 26.4 21.0 126
BURGESS JUNCTION 7880 16.4 7.6 216 21.4 17.6 122
CLOUD PEAK RESERVOIR 9860 23.5 12.8 184 25.0 20.2 124
DOME LAKE 8880 20.3 7.8 260 23.5 19.5 121
GRAVE SPRINGS 8550 12.9 4.4 293 16.6 15.2 109
HANSEN SAWMILL 8360 -M 1.0 * 16.4 13.0 126
LITTLE GOOSE 8870 18.3 -M * 25.0 -M *
MIDDLE POWDER 7760 -M 7.9 * 17.3 18.1 96
POWDER RIVER PASS 9480 21.4 5.8 369 27.2 18.4 148
SOLDIER PARK 8720 11.5 -M * 16.8 -M *
SUCKER CREEK 8880 -M 8.1 * -M 20.3 *
TIE CREEK 6870 6.5 .5 1300* 19.6 16.1 122
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Basin wide percent of average 286* 123
BELLE FOURCHE
BLIND PARK 6890 1.2 .0 * 24.6 16.6 148
COLE CANYON 5910 .2 .1 200* 19.3 11.8 164
NORTH RAPID CREEK 6130 .0 .1 0* 20.3 13.2 154
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Basin wide percent of average 700* 154
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 30.2 7.4 408 45.0 26.0 173
COLUMBINE 9160 -M 8.7 * 46.6 31.3 149
DIVIDE PEAK 8880 27.8 9.3 299 40.0 26.5 151
ELK RIVER 8700 -M 4.6 * 36.2 25.1 144
JOE WRIGHT 10120 51.2 22.2 231 51.2 33.4 153
NORTH FRENCH CREEK 10130 62.4 30.9 202 -M 32.9 *
OLD BATTLE 10000 58.1 32.8 177 64.1 43.0 149
SAGE CREEK BASIN 7850 4.4 5.4 81 25.6 15.4 166
SOUTH BRUSH CREEK 8440 17.1 4.5 380 32.7 22.6 145
TOWER 10500 76.2 49.6 154 68.7 48.6 141
WEBBER SPRINGS 9250 34.0 13.9 245 49.0 33.6 146
WILLOW CREEK PASS 9540 -M 8.4 * 28.1 17.7 159
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Basin wide percent of average 205 151
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.8 19.3 211 -M 29.9 *
CASPER MTN. 7900 10.2 8.7 117 21.5 22.7 95
DEADMAN HILL 10220 31.6 16.1 196 33.7 23.5 143
DEER PARK 9700 23.7 15.9 149 30.7 29.7 103
LAPRELE CREEK 8375 9.6 2.3 417 20.6 19.0 108
RENO HILL 8400 17.3 7.1 244 25.6 23.4 109
ROACH 9700 26.2 10.6 247 34.2 25.1 136
SAND LAKE 10050 51.6 33.2 155 50.5 32.8 154
SOUTH PASS 9040 19.9 11.0 181 22.8 25.1 91
WINDY PEAK 7900 4.2 .9 467 19.0 15.9 119
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Basin wide percent of average 188 119
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 24.0 20.2 119
DIVIDE PEAK 8880 27.8 9.3 299 40.0 26.5 151
OLD BATTLE 10000 58.1 32.8 177 64.1 43.0 149
SANDSTONE RS 8150 13.6 2.0 680 35.7 23.9 149
WHISKEY PARK 8950 -M 22.8 * 56.3 36.7 153
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Basin wide percent of average 226 146
UPPER GREEN RIVER
BIG SANDY OPENING 9080 15.4 6.5 237 21.1 17.7 119
BLIND BULL SUM 8650 43.4 22.9 190 31.2 27.1 115
EAST RIM DIVIDE 7930 5.2 6.7 78 18.8 15.3 123
ELKHART PARK G.S. 9400 15.7 7.4 212 19.2 18.0 107
GROS VENTRE SUMMIT 8750 18.6 7.9 235 22.7 16.8 135
GUNSIGHT PASS 9820 -M -M * 26.5 -M *
KENDALL R.S. 7740 7.8 .5 1560* 22.4 17.9 125
LOOMIS PARK 8240 18.2 7.2 253 29.5 21.7 136
NEW FORK LAKE 8340 7.8 1.6 488 15.9 15.0 106
POCKET CREEK 9360 15.2 -M * 20.2 -M *
SNIDER BASIN 8060 16.0 4.9 327 25.4 19.8 128
SPRING CREEK DIVIDE 9000 42.7 21.7 197 42.5 32.2 132
TRIPLE PEAK 8500 36.2 13.1 276 45.2 30.9 146
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Basin wide percent of average 226 126
LOWER GREEN RIVER
HAMS FORK 7840 5.9 .0 * 21.2 16.3 130
HEWINTA 9519 13.6 2.6 523 27.1 19.5 139
HICKERSON PARK 9145 1.1 .9 122 17.1 11.8 145
HOLE-IN-ROCK 9150 3.6 .7 514* 18.9 11.4 166
INDIAN CREEK 9425 37.7 20.9 180 36.0 31.5 114
KELLEY R.S. 8180 18.9 6.5 291 31.5 25.4 124
STEEL CREEK PARK 10200 28.5 16.4 174 31.4 22.2 141
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Basin wide percent of average 228 133
UPPER BEAR RIVER
BUG LAKE 7950 32.9 7.5 439 39.3 24.3 162
HAYDEN FORK 9212 20.8 4.8 433 41.2 27.4 150
KELLEY R.S. 8180 18.9 6.5 291 31.5 25.4 124
LILY LAKE 9156 24.2 4.3 563 32.6 23.1 141
MONTE CRISTO 8960 47.8 19.4 246 50.4 32.9 153
SALT RIVER SUMMIT 7760 13.1 2.0 655 28.3 23.3 121
TRIAL LAKE 9992 51.2 20.5 250 46.2 32.1 144
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Basin wide percent of average 321 143
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
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 1971-2000.
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.