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 SUNDAY: MAY 18 , 2008
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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 10.4 5.2 200 31.2 25.9 120
COTTONWOOD CREEK 7670 17.8 12.5 142 29.9 34.2 87
GRAND TARGHEE 9260 58.7 -M * 42.0 -M *
GRANITE CREEK 6770 9.8 6.7 146 25.5 23.8 107
GRASSY LAKE 7265 30.0 24.7 121 49.8 43.3 115
GROS VENTRE SUMMIT 8750 8.6 8.9 97 16.8 16.6 101
GUNSIGHT PASS 9820 9.7 -M * 18.0 -M *
LEWIS LAKE DIVIDE 7850 33.3 27.3 122 42.5 43.8 97
PHILLIPS BENCH 8200 26.6 22.5 118 39.4 35.1 112
SALT RIVER SUMMIT 7760 5.2 3.4 153 18.8 23.1 81
SNAKE RIVER STATION 6920 7.9 4.2 188 31.6 27.2 116
SPRING CREEK DIVIDE 9000 20.2 23.3 87 27.5 31.9 86
THUMB DIVIDE 7980 10.6 8.4 126 24.2 23.7 102
TOGWOTEE PASS 9580 30.9 26.8 115 35.3 31.2 113
TWO OCEAN PLATEAU 9240 45.6 30.1 151 -M 34.5 *
WILLOW CREEK 8380 26.1 23.6 111 46.3 40.6 114
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Basin wide percent of average 124 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 28.3 25.1 113 29.0 25.5 114
BLACK BEAR 8170 46.8 35.3 133 49.5 48.4 102
CANYON 7870 13.4 5.9 227 24.5 19.2 128
FISHER CREEK 9100 47.1 35.7 132 45.4 44.6 102
MADISON PLATEAU 7750 28.4 18.0 158 37.8 32.5 116
NORTHEAST ENTRANCE 7350 .4 2.2 18 16.4 16.3 101
PARKER PEAK 9400 31.3 23.6 133 -M 21.6 *
SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119
THUMB DIVIDE 7980 10.6 8.4 126 24.2 23.7 102
TWO OCEAN PLATEAU 9240 45.6 30.1 151 -M 34.5 *
WHISKEY CREEK 6800 16.3 8.2 199 29.2 25.9 113
WHITE MILL 8700 29.5 23.9 123 32.3 33.5 96
WOLVERINE 7650 1.0 2.0 50 17.4 17.0 102
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Basin wide percent of average 135 108
WIND RIVER
BURROUGHS CREEK 8750 13.0 9.6 135 21.3 21.2 100
COLD SPRINGS 9630 -M 2.8 * 13.4 15.8 85
DEER PARK 9700 15.6 17.1 91 25.0 29.2 86
HOBBS PARK 10100 16.8 16.2 104 20.2 19.3 105
LITTLE WARM 9370 5.1 6.8 75 17.6 18.7 94
SOUTH PASS 9040 11.3 12.6 90 21.8 24.8 88
ST. LAWRENCE ALT 8620 .2 2.9 7 11.9 14.0 85
TOGWOTEE PASS 9580 30.9 26.8 115 35.3 31.2 113
TOWNSEND CREEK 8700 3.9 5.0 78 16.3 17.5 93
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Basin wide percent of average 100 95
BIGHORN BASIN
BALD MTN. 9380 19.6 22.5 87 20.7 23.8 87
BEAR TRAP MEADOW 8200 1.1 .4 275 12.9 12.8 101
BLACKWATER 9780 30.2 28.8 105 29.9 27.0 111
BONE SPRINGS DIV 9350 19.3 15.5 125 23.7 20.6 115
EVENING STAR 9200 29.8 31.8 94 40.4 32.4 125
GRAVE SPRINGS 8550 10.4 6.2 168 14.6 14.9 98
KIRWIN 9550 10.7 10.4 103 17.9 16.1 111
MARQUETTE 8760 8.4 8.3 101 14.9 16.2 92
MIDDLE POWDER 7760 13.0 9.6 135 14.3 17.8 80
OWL CREEK 8975 .1 1.9 5 9.3 9.8 95
POWDER RIVER PASS 9480 11.0 7.1 155 19.1 18.0 106
SHELL CREEK 9580 18.7 15.8 118 20.9 19.0 110
SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119
SYLVAN ROAD 7120 .0 2.0 0 24.3 22.1 110
TIMBER CREEK 7950 1.2 1.9 63 12.5 12.8 98
YOUNTS PEAK 8350 14.8 14.3 103 20.2 20.6 98
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Basin wide percent of average 107 105
SHOSHONE RIVER
BLACKWATER 9780 30.2 28.8 105 29.9 27.0 111
EVENING STAR 9200 29.8 31.8 94 40.4 32.4 125
KIRWIN 9550 10.7 10.4 103 17.9 16.1 111
MARQUETTE 8760 8.4 8.3 101 14.9 16.2 92
SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119
SYLVAN ROAD 7120 .0 2.0 0 24.3 22.1 110
YOUNTS PEAK 8350 14.8 14.3 103 20.2 20.6 98
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Basin wide percent of average 101 111
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.1 .4 275 12.9 12.8 101
BIG GOOSE 7990 9.9 8.4 118 18.2 15.1 121
BONE SPRINGS DIV 9350 19.3 15.5 125 23.7 20.6 115
BURGESS JUNCTION 7880 15.8 8.9 178 20.4 17.3 118
CLOUD PEAK RESERVOIR 9860 17.0 14.2 120 22.1 19.8 112
DOME LAKE 8880 11.5 9.3 124 21.3 19.1 112
GRAVE SPRINGS 8550 10.4 6.2 168 14.6 14.9 98
HANSEN SAWMILL 8360 .6 1.7 35 13.2 12.7 104
MIDDLE POWDER 7760 13.0 9.6 135 14.3 17.8 80
POWDER RIVER PASS 9480 11.0 7.1 155 19.1 18.0 106
SUCKER CREEK 8880 17.4 9.1 191 24.5 19.9 123
TIE CREEK 6870 2.9 1.0 290 17.4 15.7 111
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Basin wide percent of average 142 109
BELLE FOURCHE
BLIND PARK 6890 -M .0 * 16.6 16.3 102
COLE CANYON 5910 .0 .4 0 14.7 11.5 128
NORTH RAPID CREEK 6130 -M .3 * 16.7 12.9 129
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Basin wide percent of average 0* 118
UPPER N. PLATTE RIVER
COLUMBINE 9160 19.8 10.9 182 35.0 31.0 113
DIVIDE PEAK 8880 19.2 11.0 175 29.2 26.2 111
ELK RIVER 8700 14.5 6.0 242 28.8 24.8 116
JOE WRIGHT 10120 29.1 23.1 126 36.8 32.9 112
NORTH FRENCH CREEK 10130 34.5 32.2 107 37.4 32.5 115
OLD BATTLE 10000 40.3 34.3 117 48.1 42.6 113
SAGE CREEK BASIN 7850 4.5 6.4 70 20.5 15.2 135
SOUTH BRUSH CREEK 8440 2.8 5.5 51 21.8 22.3 98
TOWER 10500 50.6 50.7 100 51.1 48.2 106
WEBBER SPRINGS 9250 23.4 16.0 146 38.0 33.3 114
WILLOW CREEK PASS 9540 20.9 9.9 211 21.6 17.4 124
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Basin wide percent of average 126 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 19.3 21.3 91 28.3 29.6 96
CASPER MTN. 7900 14.7 10.2 144 21.4 22.3 96
DEADMAN HILL 10220 22.1 17.2 128 26.1 23.2 112
DEER PARK 9700 15.6 17.1 91 25.0 29.2 86
LAPRELE CREEK 8375 1.3 2.9 45 16.6 18.6 89
RENO HILL 8400 16.8 8.4 200 26.3 23.0 114
ROACH 9700 20.3 12.0 169 28.8 24.8 116
SAND LAKE 10050 35.2 34.5 102 37.9 32.3 117
SOUTH PASS 9040 11.3 12.6 90 21.8 24.8 88
WINDY PEAK 7900 .9 1.2 75 14.3 15.6 92
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Basin wide percent of average 115 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.0 103
DIVIDE PEAK 8880 19.2 11.0 175 29.2 26.2 111
OLD BATTLE 10000 40.3 34.3 117 48.1 42.6 113
SANDSTONE RS 8150 7.9 2.8 282 26.0 23.6 110
WHISKEY PARK 8950 35.3 24.8 142 43.6 36.4 120
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Basin wide percent of average 141 113
UPPER GREEN RIVER
BIG SANDY OPENING 9080 5.7 7.8 73 15.9 17.5 91
BLIND BULL SUM 8650 26.3 24.0 110 20.7 26.9 77
EAST RIM DIVIDE 7930 .6 8.0 8 12.9 15.1 85
ELKHART PARK G.S. 9400 6.6 8.5 78 14.1 17.7 80
GROS VENTRE SUMMIT 8750 8.6 8.9 97 16.8 16.6 101
GUNSIGHT PASS 9820 9.7 -M * 18.0 -M *
KENDALL R.S. 7740 .1 2.1 5 15.9 17.7 90
LOOMIS PARK 8240 5.7 8.5 67 20.5 21.4 96
NEW FORK LAKE 8340 .2 2.7 7 12.0 14.8 81
SNIDER BASIN 8060 3.4 6.3 54 16.1 19.6 82
SPRING CREEK DIVIDE 9000 20.2 23.3 87 27.5 31.9 86
TRIPLE PEAK 8500 17.7 15.2 116 33.6 30.6 110
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Basin wide percent of average 82 90
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 12.9 16.1 80
HEWINTA 9519 3.2 3.5 91 20.3 19.3 105
HICKERSON PARK 9145 .0 1.4 0 11.4 11.6 98
HOLE-IN-ROCK 9150 .0 1.2 0 12.0 11.2 107
INDIAN CREEK 9425 -M 22.4 * -M 31.3 *
KELLEY R.S. 8180 8.4 7.8 108 21.3 25.1 85
STEEL CREEK PARK 10200 19.4 17.4 111 22.6 21.9 103
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Basin wide percent of average 99 96
UPPER BEAR RIVER
BUG LAKE 7950 12.1 9.2 132 20.2 24.0 84
HAYDEN FORK 9212 3.9 6.1 64 27.6 27.1 102
KELLEY R.S. 8180 8.4 7.8 108 21.3 25.1 85
LILY LAKE 9156 5.3 5.3 100 21.5 22.8 94
MONTE CRISTO 8960 22.0 21.1 104 30.5 32.6 94
SALT RIVER SUMMIT 7760 5.2 3.4 153 18.8 23.1 81
TRIAL LAKE 9992 17.3 21.9 79 28.8 31.7 91
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Basin wide percent of average 99 91
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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 1961-90.
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.