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 19 , 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 16.4 4.7 349 34.0 26.0 131
COTTONWOOD CREEK 7670 32.4 12.0 270 47.3 34.4 138
GRAND TARGHEE 9260 68.4 -M * -M -M *
GRANITE CREEK 6770 18.3 6.3 290 33.0 23.9 138
GRASSY LAKE 7265 41.2 24.0 172 55.1 43.4 127
GROS VENTRE SUMMIT 8750 18.8 8.6 219 22.6 16.7 135
GUNSIGHT PASS 9820 -M -M * 26.0 -M *
LEWIS LAKE DIVIDE 7850 51.3 26.8 191 49.2 43.9 112
PHILLIPS BENCH 8200 40.5 22.0 184 45.7 35.2 130
SALT RIVER SUMMIT 7760 13.5 3.0 450 27.9 23.1 121
SNAKE RIVER STATION 6920 -M 3.7 * 35.4 27.2 130
SPRING CREEK DIVIDE 9000 42.5 22.8 186 42.1 32.0 132
THUMB DIVIDE 7980 19.5 8.0 244 28.7 23.7 121
TOGWOTEE PASS 9580 41.3 26.6 155 43.4 31.3 139
TWO OCEAN PLATEAU 9240 51.9 29.8 174 43.0 34.7 124
WILLOW CREEK 8380 43.3 23.1 187 55.3 40.8 136
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Basin wide percent of average 198 129
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 32.6 24.8 131 33.4 25.7 130
BLACK BEAR 8170 53.8 34.9 154 58.4 48.6 120
CANYON 7870 17.2 5.6 307 25.0 19.3 130
FISHER CREEK 9100 52.0 35.4 147 52.7 44.8 118
MADISON PLATEAU 7750 32.3 17.5 185 41.3 32.6 127
NORTHEAST ENTRANCE 7350 5.7 1.9 300 21.1 16.4 129
PARKER PEAK 9400 37.9 23.4 162 35.4 21.7 163
SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142
THUMB DIVIDE 7980 19.5 8.0 244 28.7 23.7 121
TWO OCEAN PLATEAU 9240 51.9 29.8 174 43.0 34.7 124
WHISKEY CREEK 6800 17.0 7.7 221 30.9 26.0 119
WHITE MILL 8700 36.3 23.7 153 38.3 33.6 114
WOLVERINE 7650 7.8 1.8 433 19.9 17.1 116
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Basin wide percent of average 168 126
WIND RIVER
BURROUGHS CREEK 8750 22.1 9.3 238 26.4 21.3 124
CASTLE CREEK 8400 .4 -M * 12.7 -M *
COLD SPRINGS 9630 9.4 2.6 362 16.0 15.9 101
DEER PARK 9700 21.0 16.6 127 27.8 29.4 95
HOBBS PARK 10100 20.4 15.8 129 20.9 19.5 107
LITTLE WARM 9370 17.1 6.3 271 20.6 18.8 110
SOUTH PASS 9040 16.1 12.1 133 18.6 24.9 75
ST. LAWRENCE ALT 8620 1.4 2.6 54 15.0 14.1 106
TOGWOTEE PASS 9580 41.3 26.6 155 43.4 31.3 139
TOWNSEND CREEK 8700 5.1 4.7 109 16.3 17.6 93
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Basin wide percent of average 159 106
BIGHORN BASIN
BALD MTN. 9380 33.6 22.3 151 28.5 23.9 119
BEAR TRAP MEADOW 8200 9.0 .2 4500* 15.1 12.9 117
BLACKWATER 9780 39.0 28.8 135 37.6 27.2 138
BONE SPRINGS DIV 9350 28.1 15.1 186 25.0 20.8 120
EVENING STAR 9200 39.9 31.7 126 46.9 32.5 144
GRAVE SPRINGS 8550 10.9 5.7 191 14.7 15.0 98
KIRWIN 9550 16.9 10.2 166 20.6 16.2 127
MARQUETTE 8760 9.9 -M * 14.2 16.3 87
MIDDLE POWDER 7760 14.0 9.1 154 15.6 17.9 87
OWL CREEK 8975 3.6 1.8 200 11.5 9.9 116
POWDER RIVER PASS 9480 20.7 6.8 304 26.5 18.1 146
SHELL CREEK 9580 24.5 15.4 159 24.2 19.1 127
SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142
SYLVAN ROAD 7120 4.9 1.7 288 28.9 22.2 130
TIMBER CREEK 7950 3.6 1.8 200 12.4 12.9 96
YOUNTS PEAK 8350 23.1 13.9 166 24.1 20.7 116
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Basin wide percent of average 163 123
SHOSHONE RIVER
BLACKWATER 9780 39.0 28.8 135 37.6 27.2 138
EVENING STAR 9200 39.9 31.7 126 46.9 32.5 144
KIRWIN 9550 16.9 10.2 166 20.6 16.2 127
MARQUETTE 8760 9.9 -M * 14.2 16.3 87
SYLVAN LAKE 8420 27.7 18.8 147 38.7 27.2 142
SYLVAN ROAD 7120 4.9 1.7 288 28.9 22.2 130
YOUNTS PEAK 8350 23.1 13.9 166 24.1 20.7 116
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Basin wide percent of average 144 130
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.0 .2 4500* 15.1 12.9 117
BIG GOOSE 7990 12.1 8.2 148 17.9 15.2 118
BONE SPRINGS DIV 9350 28.1 15.1 186 25.0 20.8 120
BURGESS JUNCTION 7880 14.0 8.6 163 19.0 17.4 109
CLOUD PEAK RESERVOIR 9860 21.4 13.9 154 23.3 20.0 117
DOME LAKE 8880 18.0 8.9 202 21.5 19.2 112
GRAVE SPRINGS 8550 10.9 5.7 191 14.7 15.0 98
HANSEN SAWMILL 8360 8.0 1.4 571 14.8 12.8 116
LITTLE GOOSE 8870 15.0 -M * 22.3 -M *
MIDDLE POWDER 7760 14.0 9.1 154 15.6 17.9 87
POWDER RIVER PASS 9480 20.7 6.8 304 26.5 18.1 146
SOLDIER PARK 8720 10.3 -M * 15.5 -M *
SUCKER CREEK 8880 19.0 8.8 216 23.8 20.0 119
TIE CREEK 6870 4.7 .7 671 16.9 15.8 107
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Basin wide percent of average 206 114
BELLE FOURCHE
BLIND PARK 6890 1.1 .0 * 23.8 16.4 145
COLE CANYON 5910 .0 .3 0* 18.5 11.6 159
NORTH RAPID CREEK 6130 .0 .2 0* 18.7 13.0 144
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Basin wide percent of average 220* 149
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 31.0 8.7 356 44.4 25.8 172
COLUMBINE 9160 30.9 10.2 303 45.9 31.1 148
DIVIDE PEAK 8880 26.8 10.4 258 38.8 26.3 148
ELK RIVER 8700 21.4 5.5 389 35.5 24.9 143
JOE WRIGHT 10120 50.1 22.8 220 50.5 33.1 153
NORTH FRENCH CREEK 10130 61.2 31.8 192 -M 32.6 *
OLD BATTLE 10000 57.7 33.8 171 63.3 42.7 148
SAGE CREEK BASIN 7850 4.9 6.0 82 25.1 15.3 164
SOUTH BRUSH CREEK 8440 16.6 5.1 325 32.0 22.4 143
TOWER 10500 74.7 50.4 148 -M 48.3 *
WEBBER SPRINGS 9250 34.0 15.3 222 48.1 33.4 144
WILLOW CREEK PASS 9540 24.9 9.4 265 27.0 17.5 154
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Basin wide percent of average 207 151
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 40.1 20.7 194 -M 29.7 *
CASPER MTN. 7900 9.1 9.7 94 20.3 22.4 91
DEADMAN HILL 10220 30.7 16.8 183 33.0 23.3 142
DEER PARK 9700 21.0 16.6 127 27.8 29.4 95
LAPRELE CREEK 8375 9.4 2.7 348 20.2 18.7 108
RENO HILL 8400 16.8 8.0 210 25.2 23.1 109
ROACH 9700 25.5 11.6 220 33.5 24.9 135
SAND LAKE 10050 50.6 34.1 148 49.6 32.5 153
SOUTH PASS 9040 16.1 12.1 133 18.6 24.9 75
WINDY PEAK 7900 3.8 1.1 345 18.4 15.7 117
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Basin wide percent of average 167 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 23.2 20.1 115
DIVIDE PEAK 8880 26.8 10.4 258 38.8 26.3 148
OLD BATTLE 10000 57.7 33.8 171 63.3 42.7 148
SANDSTONE RS 8150 13.5 2.5 540 34.9 23.7 147
WHISKEY PARK 8950 -M 24.2 * 55.4 36.5 152
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Basin wide percent of average 210 144
UPPER GREEN RIVER
BIG SANDY OPENING 9080 15.6 7.4 211 20.9 17.5 119
BLIND BULL SUM 8650 44.3 23.6 188 31.1 27.0 115
EAST RIM DIVIDE 7930 6.4 7.6 84 18.7 15.2 123
ELKHART PARK G.S. 9400 15.8 8.1 195 19.0 17.8 107
GROS VENTRE SUMMIT 8750 18.8 8.6 219 22.6 16.7 135
GUNSIGHT PASS 9820 -M -M * 26.0 -M *
KENDALL R.S. 7740 8.6 1.6 538 22.3 17.8 125
LOOMIS PARK 8240 19.4 8.1 240 29.5 21.5 137
NEW FORK LAKE 8340 8.3 2.3 361 15.7 14.9 105
POCKET CREEK 9360 14.7 -M * 19.7 -M *
SNIDER BASIN 8060 16.0 5.9 271 25.0 19.7 127
SPRING CREEK DIVIDE 9000 42.5 22.8 186 42.1 32.0 132
TRIPLE PEAK 8500 36.1 14.5 249 44.9 30.7 146
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Basin wide percent of average 210 126
LOWER GREEN RIVER
HAMS FORK 7840 5.2 .0 * 20.0 16.1 124
HEWINTA 9519 12.0 3.2 375 25.5 19.4 131
HICKERSON PARK 9145 .4 1.2 33 16.0 11.7 137
HOLE-IN-ROCK 9150 2.4 1.0 240 17.7 11.2 158
INDIAN CREEK 9425 36.4 21.9 166 34.9 31.4 111
KELLEY R.S. 8180 18.4 7.4 249 30.6 25.2 121
STEEL CREEK PARK 10200 26.8 17.1 157 29.8 22.0 135
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Basin wide percent of average 196 127
UPPER BEAR RIVER
BUG LAKE 7950 31.7 8.6 369 38.3 24.1 159
HAYDEN FORK 9212 19.9 5.7 349 40.0 27.2 147
KELLEY R.S. 8180 18.4 7.4 249 30.6 25.2 121
LILY LAKE 9156 22.7 5.0 454 31.4 22.9 137
MONTE CRISTO 8960 46.3 20.5 226 48.9 32.7 150
SALT RIVER SUMMIT 7760 13.5 3.0 450 27.9 23.1 121
TRIAL LAKE 9992 50.4 21.5 234 45.2 31.8 142
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Basin wide percent of average 283 140
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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.