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 TUESDAY: MAY 24 , 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 13.6 2.4 567 34.4 26.4 130
COTTONWOOD CREEK 7670 30.3 9.4 322 48.5 35.0 139
GRAND TARGHEE 9260 69.7 -M * -M -M *
GRANITE CREEK 6770 16.3 4.2 388 33.1 24.3 136
GRASSY LAKE 7265 37.5 20.5 183 55.2 44.0 125
GROS VENTRE SUMMIT 8750 17.7 6.8 260 22.9 17.0 135
GUNSIGHT PASS 9820 -M -M * 26.9 -M *
LEWIS LAKE DIVIDE 7850 47.5 23.6 201 49.3 44.5 111
PHILLIPS BENCH 8200 38.8 19.0 204 46.2 35.8 129
SALT RIVER SUMMIT 7760 11.1 .5 2220* 28.4 23.5 121
SNAKE RIVER STATION 6920 -M 1.1 * 35.4 27.7 128
SPRING CREEK DIVIDE 9000 42.6 20.1 212 42.8 32.5 132
THUMB DIVIDE 7980 16.3 5.7 286 28.8 24.2 119
TOGWOTEE PASS 9580 41.1 25.1 164 44.0 31.9 138
TWO OCEAN PLATEAU 9240 52.4 28.4 185 43.5 35.3 123
WILLOW CREEK 8380 42.2 19.9 212 56.5 41.5 136
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Basin wide percent of average 220 128
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 32.3 23.5 137 34.7 26.2 132
BLACK BEAR 8170 51.4 32.1 160 59.0 49.3 120
CANYON 7870 13.6 3.8 358 25.1 19.8 127
FISHER CREEK 9100 52.7 33.2 159 54.2 45.5 119
MADISON PLATEAU 7750 29.2 14.2 206 41.8 33.3 126
NORTHEAST ENTRANCE 7350 2.5 1.0 250* 21.9 16.8 130
PARKER PEAK 9400 38.0 21.7 175 38.7 22.3 174
SYLVAN LAKE 8420 28.6 16.0 179 39.1 27.9 140
THUMB DIVIDE 7980 16.3 5.7 286 28.8 24.2 119
TWO OCEAN PLATEAU 9240 52.4 28.4 185 43.5 35.3 123
WHISKEY CREEK 6800 13.6 5.0 272 30.8 26.5 116
WHITE MILL 8700 35.8 21.7 165 39.2 34.2 115
WOLVERINE 7650 3.3 .7 471* 20.2 17.6 115
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Basin wide percent of average 179 126
WIND RIVER
BURROUGHS CREEK 8750 20.9 6.7 312 26.8 21.8 123
CASTLE CREEK 8400 .0 -M * 13.4 -M *
COLD SPRINGS 9630 10.5 1.5 700 18.1 16.4 110
DEER PARK 9700 23.7 13.8 172 31.3 30.0 104
HOBBS PARK 10100 24.5 13.6 180 25.0 20.1 124
LITTLE WARM 9370 16.5 4.2 393 20.9 19.3 108
SOUTH PASS 9040 19.9 9.5 209 23.2 25.4 91
ST. LAWRENCE ALT 8620 2.8 1.2 233 17.5 14.5 121
TOGWOTEE PASS 9580 41.1 25.1 164 44.0 31.9 138
TOWNSEND CREEK 8700 8.0 3.0 267 20.1 18.1 111
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Basin wide percent of average 214 115
BIGHORN BASIN
BALD MTN. 9380 39.1 20.2 194 31.8 24.5 130
BEAR TRAP MEADOW 8200 9.5 .0 * 17.3 13.4 129
BLACKWATER 9780 40.0 27.9 143 38.8 27.8 140
BONE SPRINGS DIV 9350 31.9 12.6 253 27.8 21.4 130
EVENING STAR 9200 39.8 29.9 133 48.2 33.3 145
GRAVE SPRINGS 8550 13.6 3.0 453 18.9 15.5 122
KIRWIN 9550 18.8 8.5 221 22.8 16.7 137
MARQUETTE 8760 13.7 -M * 18.0 17.0 106
MIDDLE POWDER 7760 14.9 6.3 237 19.9 18.4 108
OWL CREEK 8975 3.3 1.2 275 13.0 10.4 125
POWDER RIVER PASS 9480 22.4 4.6 487 28.5 18.7 152
SHELL CREEK 9580 27.3 13.7 199 26.9 19.6 137
SYLVAN LAKE 8420 28.6 16.0 179 39.1 27.9 140
SYLVAN ROAD 7120 .0 .4 0* 29.1 22.6 129
TIMBER CREEK 7950 4.0 1.2 333 14.4 13.5 107
YOUNTS PEAK 8350 21.6 11.3 191 24.5 21.2 116
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Basin wide percent of average 201 130
SHOSHONE RIVER
BLACKWATER 9780 40.0 27.9 143 38.8 27.8 140
EVENING STAR 9200 39.8 29.9 133 48.2 33.3 145
KIRWIN 9550 18.8 8.5 221 22.8 16.7 137
MARQUETTE 8760 13.7 -M * 18.0 17.0 106
SYLVAN LAKE 8420 28.6 16.0 179 39.1 27.9 140
SYLVAN ROAD 7120 .0 .4 0* 29.1 22.6 129
YOUNTS PEAK 8350 21.6 11.3 191 24.5 21.2 116
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Basin wide percent of average 158 132
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.5 .0 * 17.3 13.4 129
BIG GOOSE 7990 14.1 6.6 214 21.3 15.7 136
BONE SPRINGS DIV 9350 31.9 12.6 253 27.8 21.4 130
BURGESS JUNCTION 7880 16.4 6.4 256 23.9 17.9 134
CLOUD PEAK RESERVOIR 9860 25.0 11.5 217 26.7 20.7 129
DOME LAKE 8880 20.4 6.2 329 24.5 19.8 124
GRAVE SPRINGS 8550 13.6 3.0 453 18.9 15.5 122
HANSEN SAWMILL 8360 8.5 .8 1063 16.6 13.3 125
LITTLE GOOSE 8870 18.2 -M * 25.8 -M *
MIDDLE POWDER 7760 14.9 6.3 237 19.9 18.4 108
POWDER RIVER PASS 9480 22.4 4.6 487 28.5 18.7 152
SOLDIER PARK 8720 10.7 -M * 17.3 -M *
SUCKER CREEK 8880 23.7 6.8 349 29.2 20.6 142
TIE CREEK 6870 4.9 .0 * 22.1 16.4 135
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Basin wide percent of average 317 131
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100* 26.8 17.0 158
COLE CANYON 5910 .0 .0 100* 22.5 12.1 186
NORTH RAPID CREEK 6130 .0 .0 100* 22.8 13.4 170
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Basin wide percent of average * 170
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 29.4 5.5 535 46.0 26.2 176
COLUMBINE 9160 32.0 6.5 492 48.2 31.6 153
DIVIDE PEAK 8880 27.8 7.6 366 40.7 26.8 152
ELK RIVER 8700 21.1 3.4 621 37.0 25.3 146
JOE WRIGHT 10120 52.0 21.0 248 52.6 33.8 156
NORTH FRENCH CREEK 10130 64.9 29.3 222 -M 33.3 *
OLD BATTLE 10000 60.0 31.1 193 65.6 43.3 152
SAGE CREEK BASIN 7850 .3 4.4 7 25.8 15.5 166
SOUTH BRUSH CREEK 8440 16.4 3.6 456 33.4 22.9 146
TOWER 10500 79.6 48.2 165 69.2 49.0 141
WEBBER SPRINGS 9250 34.1 11.8 289 50.0 34.0 147
WILLOW CREEK PASS 9540 26.1 6.9 378 28.5 18.0 158
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Basin wide percent of average 247 152
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 41.7 17.3 241 46.2 30.3 152
CASPER MTN. 7900 8.8 7.2 122 22.2 23.1 96
DEADMAN HILL 10220 32.2 15.0 215 34.5 23.9 144
DEER PARK 9700 23.7 13.8 172 31.3 30.0 104
LAPRELE CREEK 8375 7.8 1.8 433 21.5 19.3 111
RENO HILL 8400 15.6 6.0 260 26.3 23.8 111
ROACH 9700 26.2 9.3 282 35.1 25.5 138
SAND LAKE 10050 53.0 31.6 168 52.0 33.2 157
SOUTH PASS 9040 19.9 9.5 209 23.2 25.4 91
WINDY PEAK 7900 .9 .6 150* 19.2 16.2 119
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Basin wide percent of average 205 124
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M .0 * 25.0 20.5 122
DIVIDE PEAK 8880 27.8 7.6 366 40.7 26.8 152
OLD BATTLE 10000 60.0 31.1 193 65.6 43.3 152
SANDSTONE RS 8150 13.2 1.3 1015* 36.7 24.2 152
WHISKEY PARK 8950 -M 20.5 * 57.9 37.0 156
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Basin wide percent of average 253* 149
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.6 5.2 262 21.8 18.0 121
BLIND BULL SUM 8650 43.6 21.7 201 31.3 27.4 114
EAST RIM DIVIDE 7930 2.4 5.3 45 18.9 15.5 122
ELKHART PARK G.S. 9400 14.6 6.4 228 19.3 18.3 105
GROS VENTRE SUMMIT 8750 17.7 6.8 260 22.9 17.0 135
GUNSIGHT PASS 9820 -M -M * 26.9 -M *
KENDALL R.S. 7740 6.2 .0 * 22.7 18.1 125
LOOMIS PARK 8240 16.2 5.9 275 29.5 21.9 135
NEW FORK LAKE 8340 5.9 .4 1475* 16.0 15.3 105
POCKET CREEK 9360 13.8 -M * 20.7 -M *
SNIDER BASIN 8060 13.5 3.5 386 25.5 20.0 128
SPRING CREEK DIVIDE 9000 42.6 20.1 212 42.8 32.5 132
TRIPLE PEAK 8500 34.3 11.0 312 45.5 31.2 146
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Basin wide percent of average 244 126
LOWER GREEN RIVER
HAMS FORK 7840 3.9 .0 * 21.7 16.5 132
HEWINTA 9519 12.6 1.8 700 27.1 19.7 138
HICKERSON PARK 9145 .0 .5 0* 17.1 12.0 143
HOLE-IN-ROCK 9150 2.3 .4 575* 19.0 11.6 164
INDIAN CREEK 9425 37.7 19.3 195 36.3 31.8 114
KELLEY R.S. 8180 17.7 5.2 340 31.9 25.6 125
STEEL CREEK PARK 10200 28.6 15.3 187 31.6 22.5 140
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Basin wide percent of average 242 132
UPPER BEAR RIVER
BUG LAKE 7950 31.4 6.0 523 39.7 24.5 162
HAYDEN FORK 9212 19.5 3.7 527 41.5 27.7 150
KELLEY R.S. 8180 17.7 5.2 340 31.9 25.6 125
LILY LAKE 9156 23.5 3.4 691 32.8 23.4 140
MONTE CRISTO 8960 47.7 17.6 271 51.0 33.3 153
SALT RIVER SUMMIT 7760 11.1 .5 2220* 28.4 23.5 121
TRIAL LAKE 9992 51.8 19.0 273 46.7 32.4 144
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Basin wide percent of average 366 143
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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.