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 MONDAY: MAY 23 , 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 14.2 2.8 507 34.2 26.3 130
COTTONWOOD CREEK 7670 31.3 9.9 316 48.1 34.8 138
GRAND TARGHEE 9260 68.7 -M * -M -M *
GRANITE CREEK 6770 16.7 4.6 363 33.0 24.2 136
GRASSY LAKE 7265 38.6 21.2 182 55.2 43.9 126
GROS VENTRE SUMMIT 8750 17.9 7.2 249 22.8 17.0 134
GUNSIGHT PASS 9820 -M -M * 26.6 -M *
LEWIS LAKE DIVIDE 7850 47.9 24.3 197 49.3 44.4 111
PHILLIPS BENCH 8200 38.9 19.6 198 46.0 35.7 129
SALT RIVER SUMMIT 7760 11.7 1.0 1170* 28.3 23.4 121
SNAKE RIVER STATION 6920 -M 1.6 * 35.4 27.6 128
SPRING CREEK DIVIDE 9000 43.2 20.6 210 42.7 32.4 132
THUMB DIVIDE 7980 17.5 6.2 282 28.7 24.1 119
TOGWOTEE PASS 9580 41.3 25.5 162 44.0 31.7 139
TWO OCEAN PLATEAU 9240 -M 28.7 * 43.4 35.2 123
WILLOW CREEK 8380 42.2 20.6 205 56.0 41.4 135
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Basin wide percent of average 221 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 33.3 23.8 140 34.6 26.1 133
BLACK BEAR 8170 52.2 32.7 160 58.8 49.1 120
CANYON 7870 15.1 4.0 378 25.1 19.7 127
FISHER CREEK 9100 53.3 33.7 158 54.2 45.4 119
MADISON PLATEAU 7750 30.2 14.9 203 41.6 33.2 125
NORTHEAST ENTRANCE 7350 3.8 1.2 317 21.9 16.8 130
PARKER PEAK 9400 38.3 22.1 173 38.5 22.2 173
SYLVAN LAKE 8420 27.1 16.5 164 39.0 27.7 141
THUMB DIVIDE 7980 17.5 6.2 282 28.7 24.1 119
TWO OCEAN PLATEAU 9240 -M 28.7 * 43.4 35.2 123
WHISKEY CREEK 6800 14.6 5.5 265 30.8 26.4 117
WHITE MILL 8700 36.3 22.1 164 39.2 34.1 115
WOLVERINE 7650 4.8 .9 533* 20.1 17.5 115
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Basin wide percent of average 178 126
WIND RIVER
BURROUGHS CREEK 8750 21.1 7.1 297 26.5 21.7 122
CASTLE CREEK 8400 .0 -M * 13.1 -M *
COLD SPRINGS 9630 10.7 1.6 669 18.1 16.3 111
DEER PARK 9700 23.6 14.7 161 31.0 29.9 104
HOBBS PARK 10100 24.0 14.1 170 24.5 20.0 123
LITTLE WARM 9370 16.7 4.4 380 20.8 19.2 108
SOUTH PASS 9040 19.9 9.8 203 23.0 25.3 91
ST. LAWRENCE ALT 8620 3.6 1.4 257 17.4 14.4 121
TOGWOTEE PASS 9580 41.3 25.5 162 44.0 31.7 139
TOWNSEND CREEK 8700 8.3 3.3 252 20.0 18.0 111
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Basin wide percent of average 207 115
BIGHORN BASIN
BALD MTN. 9380 38.8 20.8 187 31.6 24.4 130
BEAR TRAP MEADOW 8200 10.0 .0 * 17.3 13.3 130
BLACKWATER 9780 39.8 28.1 142 38.5 27.7 139
BONE SPRINGS DIV 9350 32.2 13.0 248 27.7 21.3 130
EVENING STAR 9200 39.9 30.3 132 47.5 33.1 144
GRAVE SPRINGS 8550 14.3 3.2 447 18.7 15.4 121
KIRWIN 9550 18.7 8.8 213 22.5 16.6 136
MARQUETTE 8760 13.6 -M * 18.0 16.9 107
MIDDLE POWDER 7760 15.7 6.8 231 19.8 18.3 108
OWL CREEK 8975 3.7 1.2 308 12.7 10.3 123
POWDER RIVER PASS 9480 22.7 5.0 454 28.5 18.6 153
SHELL CREEK 9580 27.4 14.1 194 26.9 19.5 138
SYLVAN LAKE 8420 27.1 16.5 164 39.0 27.7 141
SYLVAN ROAD 7120 1.3 .5 260* 29.0 22.5 129
TIMBER CREEK 7950 4.3 1.2 358 14.0 13.4 104
YOUNTS PEAK 8350 21.9 11.9 184 24.2 21.1 115
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Basin wide percent of average 197 130
SHOSHONE RIVER
BLACKWATER 9780 39.8 28.1 142 38.5 27.7 139
EVENING STAR 9200 39.9 30.3 132 47.5 33.1 144
KIRWIN 9550 18.7 8.8 213 22.5 16.6 136
MARQUETTE 8760 13.6 -M * 18.0 16.9 107
SYLVAN LAKE 8420 27.1 16.5 164 39.0 27.7 141
SYLVAN ROAD 7120 1.3 .5 260* 29.0 22.5 129
YOUNTS PEAK 8350 21.9 11.9 184 24.2 21.1 115
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Basin wide percent of average 155 132
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.0 .0 * 17.3 13.3 130
BIG GOOSE 7990 14.4 6.9 209 21.3 15.6 137
BONE SPRINGS DIV 9350 32.2 13.0 248 27.7 21.3 130
BURGESS JUNCTION 7880 16.6 6.7 248 23.7 17.8 133
CLOUD PEAK RESERVOIR 9860 25.0 12.0 208 26.5 20.5 129
DOME LAKE 8880 20.7 6.8 304 24.3 19.7 123
GRAVE SPRINGS 8550 14.3 3.2 447 18.7 15.4 121
HANSEN SAWMILL 8360 9.0 .8 1125 16.6 13.2 126
LITTLE GOOSE 8870 18.5 -M * 25.8 -M *
MIDDLE POWDER 7760 15.7 6.8 231 19.8 18.3 108
POWDER RIVER PASS 9480 22.7 5.0 454 28.5 18.6 153
SOLDIER PARK 8720 10.9 -M * 17.2 -M *
SUCKER CREEK 8880 24.0 7.2 333 29.2 20.5 142
TIE CREEK 6870 5.3 .1 5300* 22.1 16.3 136
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Basin wide percent of average 306 131
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 26.7 16.9 158
COLE CANYON 5910 .0 .0 100* 22.2 12.0 185
NORTH RAPID CREEK 6130 .0 .1 0* 21.7 13.3 163
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Basin wide percent of average 0* 167
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 29.5 6.1 484 46.0 26.1 176
COLUMBINE 9160 -M 7.2 * 48.1 31.5 153
DIVIDE PEAK 8880 29.1 8.1 359 40.8 26.7 153
ELK RIVER 8700 -M 3.8 * 37.0 25.3 146
JOE WRIGHT 10120 51.9 21.4 243 -M 33.7 *
NORTH FRENCH CREEK 10130 64.5 29.9 216 61.6 33.2 186
OLD BATTLE 10000 59.8 31.7 189 65.4 43.2 151
SAGE CREEK BASIN 7850 1.5 4.7 32 25.7 15.5 166
SOUTH BRUSH CREEK 8440 17.0 3.8 447 33.6 22.8 147
TOWER 10500 79.2 48.7 163 69.0 48.9 141
WEBBER SPRINGS 9250 34.2 12.5 274 50.0 33.9 147
WILLOW CREEK PASS 9540 -M 7.4 * 28.4 17.9 159
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Basin wide percent of average 220 156
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.5 18.0 231 -M 30.2 *
CASPER MTN. 7900 9.6 7.7 125 21.9 22.9 96
DEADMAN HILL 10220 32.2 15.4 209 34.3 23.8 144
DEER PARK 9700 23.6 14.7 161 31.0 29.9 104
LAPRELE CREEK 8375 8.6 2.0 430 21.1 19.2 110
RENO HILL 8400 16.3 6.3 259 26.1 23.7 110
ROACH 9700 26.6 9.7 274 35.0 25.4 138
SAND LAKE 10050 53.1 32.2 165 51.5 33.1 156
SOUTH PASS 9040 19.9 9.8 203 23.0 25.3 91
WINDY PEAK 7900 2.0 .7 286* 18.9 16.1 117
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Basin wide percent of average 200 120
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 24.8 20.4 122
DIVIDE PEAK 8880 29.1 8.1 359 40.8 26.7 153
OLD BATTLE 10000 59.8 31.7 189 65.4 43.2 151
SANDSTONE RS 8150 13.2 1.5 880 36.5 24.1 151
WHISKEY PARK 8950 -M 21.3 * 57.8 36.9 157
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Basin wide percent of average 247 149
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.9 5.6 248 21.3 17.9 119
BLIND BULL SUM 8650 43.4 22.1 196 31.2 27.3 114
EAST RIM DIVIDE 7930 3.2 5.8 55 18.8 15.5 121
ELKHART PARK G.S. 9400 15.1 6.7 225 19.3 18.2 106
GROS VENTRE SUMMIT 8750 17.9 7.2 249 22.8 17.0 134
GUNSIGHT PASS 9820 -M -M * 26.6 -M *
KENDALL R.S. 7740 6.7 .0 * 22.4 18.1 124
LOOMIS PARK 8240 16.8 6.4 263 29.5 21.8 135
NEW FORK LAKE 8340 6.6 .8 825* 15.9 15.2 105
POCKET CREEK 9360 13.9 -M * 20.3 -M *
SNIDER BASIN 8060 14.3 4.0 358 25.3 19.9 127
SPRING CREEK DIVIDE 9000 43.2 20.6 210 42.7 32.4 132
TRIPLE PEAK 8500 35.2 11.7 301 45.4 31.1 146
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Basin wide percent of average 238 126
LOWER GREEN RIVER
HAMS FORK 7840 4.5 .0 * 21.5 16.4 131
HEWINTA 9519 12.7 2.1 605 27.1 19.7 138
HICKERSON PARK 9145 .0 .6 0* 17.1 12.0 143
HOLE-IN-ROCK 9150 2.5 .5 500* 18.9 11.6 163
INDIAN CREEK 9425 37.8 19.9 190 36.2 31.7 114
KELLEY R.S. 8180 18.2 5.6 325 31.6 25.5 124
STEEL CREEK PARK 10200 28.4 15.7 181 31.5 22.4 141
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Basin wide percent of average 234 132
UPPER BEAR RIVER
BUG LAKE 7950 32.4 6.5 498 39.5 24.4 162
HAYDEN FORK 9212 19.8 4.1 483 41.2 27.6 149
KELLEY R.S. 8180 18.2 5.6 325 31.6 25.5 124
LILY LAKE 9156 23.6 3.7 638 32.7 23.3 140
MONTE CRISTO 8960 48.2 18.2 265 50.7 33.2 153
SALT RIVER SUMMIT 7760 11.7 1.0 1170* 28.3 23.4 121
TRIAL LAKE 9992 51.2 19.5 263 46.2 32.3 143
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Basin wide percent of average 350 142
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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.