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: APRIL 18 , 2011
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 25.2 16.2 156 29.3 23.2 126
COTTONWOOD CREEK 7670 34.8 23.3 149 41.9 30.2 139
GRAND TARGHEE 9260 57.4 -M * 43.0 -M *
GRANITE CREEK 6770 25.6 16.4 156 28.5 21.3 134
GRASSY LAKE 7265 46.9 36.8 127 48.5 39.0 124
GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.2 14.3 127
GUNSIGHT PASS 9820 22.5 -M * 21.0 -M *
LEWIS LAKE DIVIDE 7850 51.1 36.6 140 -M 39.8 *
PHILLIPS BENCH 8200 38.1 30.7 124 38.9 31.5 123
SALT RIVER SUMMIT 7760 19.9 13.9 143 25.3 20.5 123
SNAKE RIVER STATION 6920 -M 16.8 * 31.2 24.3 128
SPRING CREEK DIVIDE 9000 41.9 28.7 146 38.0 28.8 132
THUMB DIVIDE 7980 26.6 18.2 146 24.4 20.7 118
TOGWOTEE PASS 9580 35.8 27.0 133 37.0 27.2 136
TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 *
WILLOW CREEK 8380 45.1 31.9 141 48.6 35.4 137
----- -----
Basin wide percent of average 139 130
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 31.1 25.5 122 29.8 22.1 135
BLACK BEAR 8170 53.2 41.0 130 51.6 43.8 118
CANYON 7870 20.3 13.4 151 21.9 16.8 130
FISHER CREEK 9100 -M 37.2 * -M 39.7 *
MADISON PLATEAU 7750 34.8 25.9 134 36.8 29.2 126
NORTHEAST ENTRANCE 7350 16.1 10.1 159 18.3 13.9 132
PARKER PEAK 9400 35.0 23.6 148 29.7 18.1 164
SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145
THUMB DIVIDE 7980 26.6 18.2 146 24.4 20.7 118
TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 *
WHISKEY CREEK 6800 23.2 17.6 132 26.9 22.9 117
WHITE MILL 8700 33.6 26.1 129 33.6 29.5 114
WOLVERINE 7650 17.1 10.4 164 17.3 14.1 123
----- -----
Basin wide percent of average 136 127
WIND RIVER
BURROUGHS CREEK 8750 20.1 15.0 134 21.0 18.0 117
CASTLE CREEK 8400 7.8 -M * 10.2 -M *
COLD SPRINGS 9630 10.0 6.3 159 11.2 12.4 90
DEER PARK 9700 21.3 17.5 122 25.0 24.6 102
HOBBS PARK 10100 18.2 16.9 108 16.3 15.1 108
LITTLE WARM 9370 14.9 12.4 120 15.5 15.2 102
SOUTH PASS 9040 18.9 17.7 107 16.4 20.8 79
ST. LAWRENCE ALT 8620 5.7 7.0 81 9.7 10.5 92
TOGWOTEE PASS 9580 35.8 27.0 133 37.0 27.2 136
TOWNSEND CREEK 8700 9.9 9.6 103 13.0 13.8 94
----- -----
Basin wide percent of average 120 105
BIGHORN BASIN
BALD MTN. 9380 28.4 22.1 129 23.4 19.5 120
BEAR TRAP MEADOW 8200 10.5 4.1 256 10.7 9.7 110
BLACKWATER 9780 33.8 27.1 125 31.9 23.0 139
BONE SPRINGS DIV 9350 24.2 17.6 138 19.8 16.6 119
EVENING STAR 9200 39.0 32.3 121 40.8 28.0 146
GRAVE SPRINGS 8550 10.7 10.7 100 11.1 11.7 95
KIRWIN 9550 16.2 12.4 131 17.0 12.8 133
MARQUETTE 8760 6.0 -M * 8.9 11.9 75
MIDDLE POWDER 7760 12.0 14.0 86 12.5 14.2 88
OWL CREEK 8975 7.6 5.0 152 8.3 7.1 117
POWDER RIVER PASS 9480 18.1 11.8 153 21.1 14.2 149
SHELL CREEK 9580 20.9 16.2 129 18.7 15.2 123
SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145
SYLVAN ROAD 7120 17.8 11.5 155 25.0 19.3 130
TIMBER CREEK 7950 6.2 5.5 113 7.7 8.9 87
YOUNTS PEAK 8350 22.5 18.2 124 19.8 17.7 112
----- -----
Basin wide percent of average 128 123
SHOSHONE RIVER
BLACKWATER 9780 33.8 27.1 125 31.9 23.0 139
EVENING STAR 9200 39.0 32.3 121 40.8 28.0 146
KIRWIN 9550 16.2 12.4 131 17.0 12.8 133
MARQUETTE 8760 6.0 -M * 8.9 11.9 75
SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145
SYLVAN ROAD 7120 17.8 11.5 155 25.0 19.3 130
YOUNTS PEAK 8350 22.5 18.2 124 19.8 17.7 112
----- -----
Basin wide percent of average 127 130
POWDER-TONGUE
BEAR TRAP MEADOW 8200 10.5 4.1 256 10.7 9.7 110
BIG GOOSE 7990 10.7 12.5 86 12.5 11.0 114
BONE SPRINGS DIV 9350 24.2 17.6 138 19.8 16.6 119
BURGESS JUNCTION 7880 13.4 13.2 102 14.3 13.9 103
CLOUD PEAK RESERVOIR 9860 19.5 15.4 127 18.3 15.1 121
DOME LAKE 8880 16.5 13.8 120 15.8 15.1 105
GRAVE SPRINGS 8550 10.7 10.7 100 11.1 11.7 95
HANSEN SAWMILL 8360 9.4 5.8 162 10.6 9.6 110
LITTLE GOOSE 8870 12.4 -M * 16.7 -M *
MIDDLE POWDER 7760 12.0 14.0 86 12.5 14.2 88
POWDER RIVER PASS 9480 18.1 11.8 153 21.1 14.2 149
SOLDIER PARK 8720 10.4 -M * 11.4 -M *
SUCKER CREEK 8880 15.7 13.4 117 17.4 15.6 112
TIE CREEK 6870 7.7 5.4 143 12.5 11.8 106
----- -----
Basin wide percent of average 122 111
BELLE FOURCHE
BLIND PARK 6890 9.5 7.0 136 18.4 12.7 145
COLE CANYON 5910 7.3 7.0 104 13.7 7.9 173
NORTH RAPID CREEK 6130 6.4 8.5 75 15.4 9.8 157
----- -----
Basin wide percent of average 103 156
UPPER N. PLATTE RIVER
CINNABAR PARK 9574 29.3 17.6 166 37.0 21.9 169
COLUMBINE 9160 37.0 24.3 152 39.5 27.6 143
DIVIDE PEAK 8880 28.4 20.9 136 32.9 22.8 144
ELK RIVER 8700 27.7 19.2 144 30.2 21.6 140
JOE WRIGHT 10120 39.3 24.0 164 41.2 27.8 148
NORTH FRENCH CREEK 10130 56.0 33.1 169 -M 27.4 *
OLD BATTLE 10000 50.4 35.1 144 46.9 37.7 124
SAGE CREEK BASIN 7850 21.0 12.1 174 21.7 13.2 164
SOUTH BRUSH CREEK 8440 22.4 13.1 171 26.5 18.5 143
TOWER 10500 63.2 50.2 126 47.6 42.4 112
WEBBER SPRINGS 9250 35.7 26.1 137 41.1 29.3 140
WILLOW CREEK PASS 9540 23.3 13.9 168 20.6 14.4 143
----- -----
Basin wide percent of average 150 139
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 38.0 27.0 141 33.6 24.9 135
CASPER MTN. 7900 12.1 17.1 71 16.3 17.2 95
DEADMAN HILL 10220 25.5 18.7 136 25.7 19.2 134
DEER PARK 9700 21.3 17.5 122 25.0 24.6 102
LAPRELE CREEK 8375 13.6 9.8 139 16.2 14.6 111
RENO HILL 8400 16.6 16.0 104 19.9 17.8 112
ROACH 9700 23.9 18.4 130 27.1 20.8 130
SAND LAKE 10050 44.6 35.4 126 -M 27.1 *
SOUTH PASS 9040 18.9 17.7 107 16.4 20.8 79
WINDY PEAK 7900 10.8 7.6 142 15.2 12.1 126
----- -----
Basin wide percent of average 122 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.0 8.0 138 18.3 17.4 105
DIVIDE PEAK 8880 28.4 20.9 136 32.9 22.8 144
OLD BATTLE 10000 50.4 35.1 144 46.9 37.7 124
SANDSTONE RS 8150 21.4 12.9 166 -M 20.4 *
WHISKEY PARK 8950 -M 30.6 * -M 31.5 *
----- -----
Basin wide percent of average 145 126
UPPER GREEN RIVER
BIG SANDY OPENING 9080 18.3 15.2 120 18.5 14.7 126
BLIND BULL SUM 8650 41.3 28.9 143 27.6 24.1 115
EAST RIM DIVIDE 7930 17.2 14.0 123 16.1 13.1 123
ELKHART PARK G.S. 9400 16.8 14.0 120 16.6 14.8 112
GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.2 14.3 127
GUNSIGHT PASS 9820 22.5 -M * 21.0 -M *
KENDALL R.S. 7740 14.6 13.2 111 18.4 15.7 117
LOOMIS PARK 8240 23.9 16.8 142 24.9 18.9 132
NEW FORK LAKE 8340 14.5 11.0 132 13.5 12.5 108
POCKET CREEK 9360 16.0 -M * 17.6 -M *
SNIDER BASIN 8060 23.2 14.7 158 22.1 17.7 125
SPRING CREEK DIVIDE 9000 41.9 28.7 146 38.0 28.8 132
TRIPLE PEAK 8500 40.1 25.9 155 40.1 27.1 148
----- -----
Basin wide percent of average 137 126
LOWER GREEN RIVER
HAMS FORK 7840 15.8 9.4 168 17.2 13.6 126
HEWINTA 9519 14.7 12.0 123 20.1 16.5 122
HICKERSON PARK 9145 6.6 8.1 81 12.0 9.2 130
HOLE-IN-ROCK 9150 8.9 7.0 127 13.4 8.7 154
INDIAN CREEK 9425 37.2 29.6 126 31.3 28.0 112
KELLEY R.S. 8180 24.5 16.9 145 27.6 22.3 124
STEEL CREEK PARK 10200 21.1 17.6 120 23.5 18.7 126
----- -----
Basin wide percent of average 128 124
UPPER BEAR RIVER
BUG LAKE 7950 34.8 21.4 163 34.0 21.1 161
HAYDEN FORK 9212 26.6 16.1 165 33.7 23.5 143
KELLEY R.S. 8180 24.5 16.9 145 27.6 22.3 124
LILY LAKE 9156 24.8 14.1 176 25.6 19.7 130
MONTE CRISTO 8960 45.0 30.4 148 42.8 28.3 151
SALT RIVER SUMMIT 7760 19.9 13.9 143 25.3 20.5 123
TRIAL LAKE 9992 42.2 26.5 159 39.0 27.6 141
----- -----
Basin wide percent of average 156 140
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.