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 WEDNESDAY: MAY 25 , 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 13.1 1.9 689 35.2 26.5 133
COTTONWOOD CREEK 7670 31.0 8.9 348 49.1 35.1 140
GRAND TARGHEE 9260 71.3 -M * -M -M *
GRANITE CREEK 6770 15.7 3.8 413 33.5 24.4 137
GRASSY LAKE 7265 37.1 19.7 188 56.1 44.2 127
GROS VENTRE SUMMIT 8750 17.5 6.4 273 23.1 17.1 135
GUNSIGHT PASS 9820 -M -M * 27.2 -M *
LEWIS LAKE DIVIDE 7850 47.0 23.0 204 49.5 44.6 111
PHILLIPS BENCH 8200 38.6 18.4 210 46.8 35.9 130
SALT RIVER SUMMIT 7760 11.2 .0 * 28.7 23.6 122
SNAKE RIVER STATION 6920 -M .5 * 36.2 27.8 130
SPRING CREEK DIVIDE 9000 42.4 19.5 217 43.0 32.5 132
THUMB DIVIDE 7980 16.6 5.2 319 29.5 24.3 121
TOGWOTEE PASS 9580 41.6 24.8 168 44.4 32.0 139
TWO OCEAN PLATEAU 9240 53.0 28.0 189 44.1 35.5 124
WILLOW CREEK 8380 42.4 19.3 220 57.5 41.7 138
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Basin wide percent of average 228 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 32.6 23.2 141 35.4 26.3 135
BLACK BEAR 8170 51.1 31.5 162 60.2 49.4 122
CANYON 7870 13.6 3.5 389 25.3 19.9 127
FISHER CREEK 9100 52.8 33.0 160 54.7 45.7 120
MADISON PLATEAU 7750 29.1 13.6 214 42.9 33.4 128
NORTHEAST ENTRANCE 7350 1.9 .9 211* 22.4 16.9 133
PARKER PEAK 9400 39.0 21.5 181 39.3 22.4 175
SYLVAN LAKE 8420 28.5 15.5 184 39.9 28.0 143
THUMB DIVIDE 7980 16.6 5.2 319 29.5 24.3 121
TWO OCEAN PLATEAU 9240 53.0 28.0 189 44.1 35.5 124
WHISKEY CREEK 6800 13.1 4.5 291 32.0 26.6 120
WHITE MILL 8700 35.5 21.3 167 39.3 34.3 115
WOLVERINE 7650 3.5 .6 583* 20.9 17.7 118
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Basin wide percent of average 183 128
WIND RIVER
BURROUGHS CREEK 8750 20.7 6.3 329 27.1 21.9 124
CASTLE CREEK 8400 .0 -M * 13.8 -M *
COLD SPRINGS 9630 10.4 1.3 800 18.2 16.5 110
DEER PARK 9700 23.6 13.2 179 31.5 30.2 104
HOBBS PARK 10100 24.3 13.2 184 25.3 20.2 125
LITTLE WARM 9370 16.3 3.9 418 21.0 19.4 108
SOUTH PASS 9040 19.8 9.2 215 23.4 25.4 92
ST. LAWRENCE ALT 8620 2.4 1.0 240 17.6 14.6 121
TOGWOTEE PASS 9580 41.6 24.8 168 44.4 32.0 139
TOWNSEND CREEK 8700 7.8 2.8 279 20.1 18.2 110
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Basin wide percent of average 220 115
BIGHORN BASIN
BALD MTN. 9380 39.4 19.9 198 32.3 24.6 131
BEAR TRAP MEADOW 8200 8.7 .1 8700* 17.5 13.5 130
BLACKWATER 9780 40.7 27.7 147 39.2 28.0 140
BONE SPRINGS DIV 9350 32.1 12.2 263 28.2 21.5 131
EVENING STAR 9200 40.0 29.6 135 48.9 33.4 146
GRAVE SPRINGS 8550 13.0 2.9 448 19.0 15.5 123
KIRWIN 9550 18.8 8.2 229 23.1 16.8 138
MARQUETTE 8760 13.9 -M * 18.8 17.1 110
MIDDLE POWDER 7760 14.1 6.0 235 20.3 18.5 110
OWL CREEK 8975 2.9 1.1 264 13.2 10.5 126
POWDER RIVER PASS 9480 22.2 4.3 516 28.6 18.8 152
SHELL CREEK 9580 27.6 13.4 206 27.3 19.8 138
SYLVAN LAKE 8420 28.5 15.5 184 39.9 28.0 143
SYLVAN ROAD 7120 .0 .4 0* 29.7 22.7 131
TIMBER CREEK 7950 3.7 1.1 336 14.9 13.6 110
YOUNTS PEAK 8350 21.0 10.8 194 24.6 21.3 115
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Basin wide percent of average 204 131
SHOSHONE RIVER
BLACKWATER 9780 40.7 27.7 147 39.2 28.0 140
EVENING STAR 9200 40.0 29.6 135 48.9 33.4 146
KIRWIN 9550 18.8 8.2 229 23.1 16.8 138
MARQUETTE 8760 13.9 -M * 18.8 17.1 110
SYLVAN LAKE 8420 28.5 15.5 184 39.9 28.0 143
SYLVAN ROAD 7120 .0 .4 0* 29.7 22.7 131
YOUNTS PEAK 8350 21.0 10.8 194 24.6 21.3 115
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Basin wide percent of average 162 134
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.7 .1 8700* 17.5 13.5 130
BIG GOOSE 7990 14.2 6.2 229 22.5 15.8 142
BONE SPRINGS DIV 9350 32.1 12.2 263 28.2 21.5 131
BURGESS JUNCTION 7880 16.0 5.9 271 24.4 17.9 136
CLOUD PEAK RESERVOIR 9860 25.2 11.2 225 27.0 20.8 130
DOME LAKE 8880 20.4 5.7 358 24.8 19.9 125
GRAVE SPRINGS 8550 13.0 2.9 448 19.0 15.5 123
HANSEN SAWMILL 8360 8.0 .7 1143 16.9 13.4 126
LITTLE GOOSE 8870 18.0 -M * 26.4 -M *
MIDDLE POWDER 7760 14.1 6.0 235 20.3 18.5 110
POWDER RIVER PASS 9480 22.2 4.3 516 28.6 18.8 152
SOLDIER PARK 8720 10.3 -M * 17.6 -M *
SUCKER CREEK 8880 23.9 6.5 368 29.9 20.8 144
TIE CREEK 6870 4.5 .0 * 23.1 16.5 140
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Basin wide percent of average 328 133
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 26.9 17.1 157
COLE CANYON 5910 .0 .0 100* 23.1 12.2 189
NORTH RAPID CREEK 6130 .0 .0 100* 23.3 13.5 173
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Basin wide percent of average * 171
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 28.9 4.9 590 46.1 26.3 175
COLUMBINE 9160 30.4 5.8 524 48.3 31.7 152
DIVIDE PEAK 8880 26.8 7.0 383 40.8 26.9 152
ELK RIVER 8700 20.0 3.1 645 37.0 25.4 146
JOE WRIGHT 10120 52.4 20.6 254 52.9 34.0 156
NORTH FRENCH CREEK 10130 64.6 28.7 225 -M 33.4 *
OLD BATTLE 10000 58.7 30.5 192 65.8 43.5 151
SAGE CREEK BASIN 7850 .0 4.1 0 25.8 15.6 165
SOUTH BRUSH CREEK 8440 15.7 3.3 476 33.5 23.0 146
TOWER 10500 79.1 47.6 166 69.4 49.1 141
WEBBER SPRINGS 9250 32.9 11.1 296 50.1 34.0 147
WILLOW CREEK PASS 9540 25.9 6.4 405 28.7 18.1 159
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Basin wide percent of average 252 152
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.1 16.6 248 46.5 30.4 153
CASPER MTN. 7900 7.8 6.8 115 22.5 23.2 97
DEADMAN HILL 10220 32.1 14.6 220 34.6 24.0 144
DEER PARK 9700 23.6 13.2 179 31.5 30.2 104
LAPRELE CREEK 8375 7.1 1.7 418 21.5 19.4 111
RENO HILL 8400 14.8 5.6 264 26.3 23.9 110
ROACH 9700 25.8 8.9 290 35.2 25.6 138
SAND LAKE 10050 53.1 30.9 172 52.3 33.4 157
SOUTH PASS 9040 19.8 9.2 215 23.4 25.4 92
WINDY PEAK 7900 .6 .5 120* 19.2 16.3 118
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Basin wide percent of average 209 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 25.2 20.5 123
DIVIDE PEAK 8880 26.8 7.0 383 40.8 26.9 152
OLD BATTLE 10000 58.7 30.5 192 65.8 43.5 151
SANDSTONE RS 8150 11.8 1.1 1073* 36.8 24.3 151
WHISKEY PARK 8950 -M 19.7 * 58.1 37.1 157
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Basin wide percent of average 252* 149
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.8 4.7 294 22.1 18.0 123
BLIND BULL SUM 8650 44.0 21.3 207 31.3 27.5 114
EAST RIM DIVIDE 7930 2.0 4.9 41 19.2 15.6 123
ELKHART PARK G.S. 9400 14.6 6.0 243 19.5 18.4 106
GROS VENTRE SUMMIT 8750 17.5 6.4 273 23.1 17.1 135
GUNSIGHT PASS 9820 -M -M * 27.2 -M *
KENDALL R.S. 7740 5.8 .0 * 22.8 18.2 125
LOOMIS PARK 8240 15.8 5.5 287 29.6 22.0 135
NEW FORK LAKE 8340 5.9 .0 * 16.3 15.4 106
POCKET CREEK 9360 13.9 -M * 21.0 -M *
SNIDER BASIN 8060 12.8 3.0 427 25.7 20.0 129
SPRING CREEK DIVIDE 9000 42.4 19.5 217 43.0 32.5 132
TRIPLE PEAK 8500 33.7 10.2 330 45.6 31.3 146
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Basin wide percent of average 256 126
LOWER GREEN RIVER
HAMS FORK 7840 3.6 .0 * 21.8 16.5 132
HEWINTA 9519 12.8 1.6 800 27.2 19.8 137
HICKERSON PARK 9145 .0 .4 0* 17.0 12.1 140
HOLE-IN-ROCK 9150 1.8 .3 600* 19.0 11.7 162
INDIAN CREEK 9425 37.7 18.8 201 36.6 31.9 115
KELLEY R.S. 8180 17.7 4.7 377 32.3 25.7 126
STEEL CREEK PARK 10200 28.7 14.9 193 31.7 22.6 140
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Basin wide percent of average 251 132
UPPER BEAR RIVER
BUG LAKE 7950 30.9 5.5 562 39.9 24.6 162
HAYDEN FORK 9212 19.7 3.4 579 41.7 27.8 150
KELLEY R.S. 8180 17.7 4.7 377 32.3 25.7 126
LILY LAKE 9156 23.4 3.1 755 32.9 23.5 140
MONTE CRISTO 8960 48.0 17.0 282 51.4 33.4 154
SALT RIVER SUMMIT 7760 11.2 .0 * 28.7 23.6 122
TRIAL LAKE 9992 51.6 18.5 279 46.9 32.5 144
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Basin wide percent of average 388 143
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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.