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 28 , 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 11.2 .5 2240* 35.6 26.8 133
COTTONWOOD CREEK 7670 30.0 7.3 411 49.7 35.4 140
GRAND TARGHEE 9260 69.5 -M * -M -M *
GRANITE CREEK 6770 13.8 2.5 552 33.6 24.6 137
GRASSY LAKE 7265 35.4 17.4 203 56.5 44.6 127
GROS VENTRE SUMMIT 8750 16.4 5.3 309 23.1 17.4 133
GUNSIGHT PASS 9820 -M -M * 27.3 -M *
LEWIS LAKE DIVIDE 7850 44.8 20.9 214 50.0 45.0 111
PHILLIPS BENCH 8200 37.8 16.5 229 47.3 36.2 131
SALT RIVER SUMMIT 7760 9.6 .0 * 28.9 23.8 121
SNAKE RIVER STATION 6920 -M .0 * 36.4 28.1 130
SPRING CREEK DIVIDE 9000 42.1 17.6 239 43.6 32.8 133
THUMB DIVIDE 7980 15.3 3.8 403 29.8 24.5 122
TOGWOTEE PASS 9580 41.4 23.7 175 44.8 32.3 139
TWO OCEAN PLATEAU 9240 53.3 26.9 198 44.6 35.8 125
WILLOW CREEK 8380 41.4 17.2 241 58.1 42.1 138
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Basin wide percent of average 246 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.3 22.1 151 36.2 26.6 136
BLACK BEAR 8170 51.6 29.4 176 61.2 49.8 123
CANYON 7870 -M 2.6 * 26.5 20.2 131
FISHER CREEK 9100 54.1 31.8 170 55.5 46.1 120
MADISON PLATEAU 7750 29.6 11.6 255 44.2 33.8 131
NORTHEAST ENTRANCE 7350 .5 .7 71* 22.8 17.2 133
PARKER PEAK 9400 39.8 20.4 195 40.9 22.7 180
SYLVAN LAKE 8420 -M 14.0 * 40.9 28.4 144
THUMB DIVIDE 7980 15.3 3.8 403 29.8 24.5 122
TWO OCEAN PLATEAU 9240 53.3 26.9 198 44.6 35.8 125
WHISKEY CREEK 6800 12.6 2.7 467 33.0 26.9 123
WHITE MILL 8700 35.1 19.9 176 40.0 34.7 115
WOLVERINE 7650 -M .2 * 21.4 17.9 120
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Basin wide percent of average 192 129
WIND RIVER
BURROUGHS CREEK 8750 19.7 5.1 386 27.3 22.2 123
CASTLE CREEK 8400 .0 -M * 13.8 -M *
COLD SPRINGS 9630 9.4 1.2 783 18.3 16.7 110
DEER PARK 9700 23.3 11.3 206 31.6 30.5 104
HOBBS PARK 10100 24.2 11.8 205 25.3 20.6 123
LITTLE WARM 9370 15.3 3.0 510 21.0 19.7 107
SOUTH PASS 9040 18.7 8.3 225 23.6 25.7 92
ST. LAWRENCE ALT 8620 .3 .9 33 17.6 14.9 118
TOGWOTEE PASS 9580 41.4 23.7 175 44.8 32.3 139
TOWNSEND CREEK 8700 6.4 2.4 267 20.1 18.5 109
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Basin wide percent of average 234 114
BIGHORN BASIN
BALD MTN. 9380 39.0 18.6 210 32.4 24.9 130
BEAR TRAP MEADOW 8200 7.1 .0 * 17.9 13.8 130
BLACKWATER 9780 41.6 26.7 156 40.3 28.4 142
BONE SPRINGS DIV 9350 31.7 10.8 294 28.3 21.9 129
EVENING STAR 9200 40.9 28.5 144 50.3 33.8 149
GRAVE SPRINGS 8550 11.7 2.5 468 19.1 15.8 121
KIRWIN 9550 17.9 7.1 252 23.1 17.1 135
MARQUETTE 8760 12.8 -M * 19.0 17.5 109
MIDDLE POWDER 7760 12.0 4.5 267 20.5 18.7 110
OWL CREEK 8975 .5 .8 63 13.3 10.7 124
POWDER RIVER PASS 9480 22.0 3.4 647 29.0 19.2 151
SHELL CREEK 9580 27.7 12.4 223 27.6 20.1 137
SYLVAN LAKE 8420 -M 14.0 * 40.9 28.4 144
SYLVAN ROAD 7120 .5 .3 167* 30.6 23.0 133
TIMBER CREEK 7950 1.3 1.0 130 14.9 14.0 106
YOUNTS PEAK 8350 20.0 9.5 211 24.7 21.7 114
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Basin wide percent of average 217 131
SHOSHONE RIVER
BLACKWATER 9780 41.6 26.7 156 40.3 28.4 142
EVENING STAR 9200 40.9 28.5 144 50.3 33.8 149
KIRWIN 9550 17.9 7.1 252 23.1 17.1 135
MARQUETTE 8760 12.8 -M * 19.0 17.5 109
SYLVAN LAKE 8420 -M 14.0 * 40.9 28.4 144
SYLVAN ROAD 7120 .5 .3 167* 30.6 23.0 133
YOUNTS PEAK 8350 20.0 9.5 211 24.7 21.7 114
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Basin wide percent of average 168 135
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.1 .0 * 17.9 13.8 130
BIG GOOSE 7990 12.9 4.9 263 22.9 16.1 142
BONE SPRINGS DIV 9350 31.7 10.8 294 28.3 21.9 129
BURGESS JUNCTION 7880 14.9 4.7 317 24.5 18.2 135
CLOUD PEAK RESERVOIR 9860 25.8 9.9 261 27.7 21.2 131
DOME LAKE 8880 19.5 4.5 433 25.2 20.2 125
GRAVE SPRINGS 8550 11.7 2.5 468 19.1 15.8 121
HANSEN SAWMILL 8360 6.2 .5 1240* 17.4 13.7 127
LITTLE GOOSE 8870 17.1 -M * 26.7 -M *
MIDDLE POWDER 7760 12.0 4.5 267 20.5 18.7 110
POWDER RIVER PASS 9480 22.0 3.4 647 29.0 19.2 151
SOLDIER PARK 8720 9.5 -M * 18.1 -M *
SUCKER CREEK 8880 23.0 5.2 442 30.2 21.1 143
TIE CREEK 6870 2.4 .0 * 23.3 16.8 139
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Basin wide percent of average 372 132
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 27.4 17.4 157
COLE CANYON 5910 .2 .0 * 23.3 12.5 186
NORTH RAPID CREEK 6130 .0 .0 100* 23.3 13.7 170
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Basin wide percent of average * 170
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 28.4 3.3 861 46.4 26.5 175
COLUMBINE 9160 27.9 4.0 698 48.5 31.9 152
DIVIDE PEAK 8880 24.2 5.5 440 40.8 27.2 150
ELK RIVER 8700 18.2 2.2 827 37.4 25.7 146
JOE WRIGHT 10120 52.3 19.2 272 53.5 34.4 156
NORTH FRENCH CREEK 10130 64.6 26.8 241 -M 33.8 *
OLD BATTLE 10000 59.3 28.5 208 66.2 43.8 151
SAGE CREEK BASIN 7850 .0 3.2 0 25.8 15.8 163
SOUTH BRUSH CREEK 8440 -M 2.5 * 33.5 23.3 144
TOWER 10500 79.7 45.7 174 70.2 49.5 142
WEBBER SPRINGS 9250 30.7 9.0 341 50.4 34.3 147
WILLOW CREEK PASS 9540 25.2 4.9 514 28.8 18.4 157
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Basin wide percent of average 270 152
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 -M 14.4 * 46.6 30.7 152
CASPER MTN. 7900 6.0 5.6 107 22.7 23.5 97
DEADMAN HILL 10220 32.0 13.2 242 34.8 24.3 143
DEER PARK 9700 23.3 11.3 206 31.6 30.5 104
LAPRELE CREEK 8375 5.3 1.2 442 21.5 19.7 109
RENO HILL 8400 13.3 4.6 289 26.3 24.3 108
ROACH 9700 24.8 7.6 326 35.4 26.0 136
SAND LAKE 10050 52.9 28.9 183 52.5 33.8 155
SOUTH PASS 9040 18.7 8.3 225 23.6 25.7 92
WINDY PEAK 7900 .0 .3 0* 19.2 16.6 116
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Basin wide percent of average 218 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 25.4 20.7 123
DIVIDE PEAK 8880 24.2 5.5 440 40.8 27.2 150
OLD BATTLE 10000 59.3 28.5 208 66.2 43.8 151
SANDSTONE RS 8150 9.3 .6 1550* 37.0 24.5 151
WHISKEY PARK 8950 -M 17.1 * 58.6 37.4 157
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Basin wide percent of average 268* 148
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.7 3.3 385 22.2 18.3 121
BLIND BULL SUM 8650 43.4 19.9 218 31.6 27.8 114
EAST RIM DIVIDE 7930 .0 3.4 0 19.2 15.8 122
ELKHART PARK G.S. 9400 13.3 4.8 277 19.5 18.7 104
GROS VENTRE SUMMIT 8750 16.4 5.3 309 23.1 17.4 133
GUNSIGHT PASS 9820 -M -M * 27.3 -M *
KENDALL R.S. 7740 3.1 .0 * 22.8 18.4 124
LOOMIS PARK 8240 14.5 4.2 345 29.9 22.2 135
NEW FORK LAKE 8340 3.6 .0 * 16.3 15.6 104
POCKET CREEK 9360 13.3 -M * 21.0 -M *
SNIDER BASIN 8060 10.8 1.5 720 26.0 20.2 129
SPRING CREEK DIVIDE 9000 42.1 17.6 239 43.6 32.8 133
TRIPLE PEAK 8500 32.5 7.9 411 46.0 31.6 146
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Basin wide percent of average 283 126
LOWER GREEN RIVER
HAMS FORK 7840 .7 .0 * 22.1 16.7 132
HEWINTA 9519 10.4 1.1 945* 27.2 20.0 136
HICKERSON PARK 9145 .0 .2 0* 17.1 12.3 139
HOLE-IN-ROCK 9150 .2 .1 200* 19.1 12.0 159
INDIAN CREEK 9425 37.4 17.1 219 36.9 32.2 115
KELLEY R.S. 8180 16.7 3.3 506 32.5 25.9 125
STEEL CREEK PARK 10200 28.2 13.6 207 31.8 22.9 139
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Basin wide percent of average 264* 131
UPPER BEAR RIVER
BUG LAKE 7950 29.1 4.1 710 39.9 24.8 161
HAYDEN FORK 9212 16.5 2.4 688 41.7 28.1 148
KELLEY R.S. 8180 16.7 3.3 506 32.5 25.9 125
LILY LAKE 9156 21.4 2.3 930 32.9 23.8 138
MONTE CRISTO 8960 47.0 15.1 311 51.5 33.7 153
SALT RIVER SUMMIT 7760 9.6 .0 * 28.9 23.8 121
TRIAL LAKE 9992 51.2 16.8 305 47.1 32.9 143
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Basin wide percent of average 435 142
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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.