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 13 , 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 13.7 7.4 185 31.2 25.4 123
COTTONWOOD CREEK 7670 22.1 14.9 148 30.1 33.6 90
GRAND TARGHEE 9260 58.5 -M * 41.6 -M *
GRANITE CREEK 6770 13.1 8.6 152 25.5 23.4 109
GRASSY LAKE 7265 33.3 27.7 120 49.8 42.6 117
GROS VENTRE SUMMIT 8750 11.9 10.5 113 16.8 16.2 104
GUNSIGHT PASS 9820 13.6 -M * 17.9 -M *
LEWIS LAKE DIVIDE 7850 39.1 30.0 130 -M 43.2 *
PHILLIPS BENCH 8200 31.0 25.1 124 39.3 34.6 114
SALT RIVER SUMMIT 7760 9.9 5.8 171 18.8 22.6 83
SNAKE RIVER STATION 6920 13.5 6.7 201 31.7 26.7 119
SPRING CREEK DIVIDE 9000 23.0 25.5 90 27.4 31.4 87
THUMB DIVIDE 7980 14.7 10.5 140 24.1 23.2 104
TOGWOTEE PASS 9580 31.0 27.7 112 35.1 30.6 115
TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 *
WILLOW CREEK 8380 30.6 26.3 116 46.3 39.8 116
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Basin wide percent of average 127 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 29.6 25.7 115 28.9 25.0 116
BLACK BEAR 8170 48.5 37.2 130 49.4 47.7 104
CANYON 7870 16.2 7.7 210 24.4 18.8 130
FISHER CREEK 9100 47.4 37.2 127 45.0 43.8 103
MADISON PLATEAU 7750 31.1 20.5 152 37.7 31.9 118
NORTHEAST ENTRANCE 7350 5.3 4.1 129 16.4 15.8 104
PARKER PEAK 9400 33.2 24.2 137 -M 21.0 *
SYLVAN LAKE 8420 21.9 21.1 104 32.0 26.3 122
THUMB DIVIDE 7980 14.7 10.5 140 24.1 23.2 104
TWO OCEAN PLATEAU 9240 -M 31.0 * -M 33.8 *
WHISKEY CREEK 6800 19.1 10.8 177 29.1 25.4 115
WHITE MILL 8700 32.2 25.3 127 32.2 32.8 98
WOLVERINE 7650 6.0 3.9 154 17.2 16.5 104
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Basin wide percent of average 134 110
WIND RIVER
BURROUGHS CREEK 8750 15.5 10.9 142 21.3 20.6 103
COLD SPRINGS 9630 .9 3.7 24 13.3 15.3 87
DEER PARK 9700 16.1 17.2 94 24.5 28.5 86
HOBBS PARK 10100 17.1 17.1 100 19.9 18.7 106
LITTLE WARM 9370 8.7 8.3 105 17.6 18.2 97
SOUTH PASS 9040 13.6 14.7 93 21.5 24.3 88
ST. LAWRENCE ALT 8620 1.9 4.3 44 11.5 13.5 85
TOGWOTEE PASS 9580 31.0 27.7 112 35.1 30.6 115
TOWNSEND CREEK 8700 6.2 6.3 98 15.7 17.0 92
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Basin wide percent of average 101 97
BIGHORN BASIN
BALD MTN. 9380 20.6 23.4 88 20.0 23.1 87
BEAR TRAP MEADOW 8200 5.0 1.0 500 12.9 12.2 106
BLACKWATER 9780 31.2 28.9 108 29.5 26.4 112
BONE SPRINGS DIV 9350 21.4 16.7 128 22.9 20.0 114
EVENING STAR 9200 32.8 32.8 100 40.2 31.7 127
GRAVE SPRINGS 8550 11.8 8.8 134 14.4 14.5 99
KIRWIN 9550 12.8 11.6 110 17.5 15.6 112
MARQUETTE 8760 10.0 9.4 106 14.5 15.5 94
MIDDLE POWDER 7760 15.8 11.7 135 14.4 17.3 83
OWL CREEK 8975 .7 2.6 27 9.3 9.3 100
POWDER RIVER PASS 9480 12.8 8.6 149 19.0 17.4 109
SHELL CREEK 9580 19.6 16.7 117 20.5 18.4 111
SYLVAN LAKE 8420 21.9 21.1 104 32.0 26.3 122
SYLVAN ROAD 7120 4.7 3.3 142 24.5 21.7 113
TIMBER CREEK 7950 3.8 2.5 152 12.2 12.1 101
YOUNTS PEAK 8350 17.3 16.1 107 20.3 20.1 101
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Basin wide percent of average 113 107
SHOSHONE RIVER
BLACKWATER 9780 31.2 28.9 108 29.5 26.4 112
EVENING STAR 9200 32.8 32.8 100 40.2 31.7 127
KIRWIN 9550 12.8 11.6 110 17.5 15.6 112
MARQUETTE 8760 10.0 9.4 106 14.5 15.5 94
SYLVAN LAKE 8420 21.9 21.1 104 32.0 26.3 122
SYLVAN ROAD 7120 4.7 3.3 142 24.5 21.7 113
YOUNTS PEAK 8350 17.3 16.1 107 20.3 20.1 101
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Basin wide percent of average 106 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 5.0 1.0 500 12.9 12.2 106
BIG GOOSE 7990 11.7 9.5 123 17.6 14.6 121
BONE SPRINGS DIV 9350 21.4 16.7 128 22.9 20.0 114
BURGESS JUNCTION 7880 17.1 10.8 158 20.0 16.8 119
CLOUD PEAK RESERVOIR 9860 19.8 15.1 131 21.6 19.1 113
DOME LAKE 8880 13.0 11.0 118 20.6 18.5 111
GRAVE SPRINGS 8550 11.8 8.8 134 14.4 14.5 99
HANSEN SAWMILL 8360 3.1 2.7 115 13.1 12.2 107
MIDDLE POWDER 7760 15.8 11.7 135 14.4 17.3 83
POWDER RIVER PASS 9480 12.8 8.6 149 19.0 17.4 109
SUCKER CREEK 8880 18.3 10.8 169 23.4 19.2 122
TIE CREEK 6870 5.8 1.7 341 17.1 15.1 113
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Basin wide percent of average 144 110
BELLE FOURCHE
BLIND PARK 6890 1.2 .5 240 16.3 15.7 104
COLE CANYON 5910 3.9 1.0 390 14.2 11.0 129
NORTH RAPID CREEK 6130 6.2 .8 775 16.2 12.5 130
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Basin wide percent of average 491 119
UPPER N. PLATTE RIVER
COLUMBINE 9160 21.6 14.5 149 34.5 30.5 113
DIVIDE PEAK 8880 20.7 13.9 149 28.6 25.7 111
ELK RIVER 8700 17.5 8.7 201 28.4 24.3 117
JOE WRIGHT 10120 29.1 24.2 120 36.1 32.1 112
NORTH FRENCH CREEK 10130 34.5 33.6 103 37.0 31.7 117
OLD BATTLE 10000 39.6 36.1 110 47.3 41.9 113
SAGE CREEK BASIN 7850 8.1 8.1 100 20.3 14.9 136
SOUTH BRUSH CREEK 8440 6.2 7.2 86 21.2 21.7 98
TOWER 10500 50.9 51.9 98 -M 47.4 *
WEBBER SPRINGS 9250 24.7 19.4 127 37.3 32.7 114
WILLOW CREEK PASS 9540 21.5 11.9 181 21.0 16.9 124
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Basin wide percent of average 120 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 20.5 24.2 85 27.8 28.9 96
CASPER MTN. 7900 16.6 12.7 131 21.0 21.5 98
DEADMAN HILL 10220 21.3 18.5 115 25.1 22.6 111
DEER PARK 9700 16.1 17.2 94 24.5 28.5 86
LAPRELE CREEK 8375 4.3 4.1 105 16.1 18.0 89
RENO HILL 8400 17.8 10.5 170 25.4 22.2 114
ROACH 9700 19.9 14.4 138 27.9 24.1 116
SAND LAKE 10050 34.9 36.0 97 37.1 31.5 118
SOUTH PASS 9040 13.6 14.7 93 21.5 24.3 88
WINDY PEAK 7900 3.5 2.1 167 14.1 15.0 94
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Basin wide percent of average 109 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .6 1.2 50 20.7 19.6 106
DIVIDE PEAK 8880 20.7 13.9 149 28.6 25.7 111
OLD BATTLE 10000 39.6 36.1 110 47.3 41.9 113
SANDSTONE RS 8150 10.5 4.5 233 26.0 23.2 112
WHISKEY PARK 8950 36.6 27.5 133 -M 35.8 *
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Basin wide percent of average 130 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 10.0 9.8 102 15.8 17.0 93
BLIND BULL SUM 8650 27.9 25.5 109 20.6 26.4 78
EAST RIM DIVIDE 7930 5.0 9.9 51 12.8 14.7 87
ELKHART PARK G.S. 9400 10.0 10.0 100 13.9 17.2 81
GROS VENTRE SUMMIT 8750 11.9 10.5 113 16.8 16.2 104
GUNSIGHT PASS 9820 13.6 -M * 17.9 -M *
KENDALL R.S. 7740 4.6 4.7 98 15.6 17.4 90
LOOMIS PARK 8240 9.9 10.4 95 20.4 21.0 97
NEW FORK LAKE 8340 4.3 4.6 93 11.2 14.4 78
SNIDER BASIN 8060 7.7 8.5 91 16.0 19.3 83
SPRING CREEK DIVIDE 9000 23.0 25.5 90 27.4 31.4 87
TRIPLE PEAK 8500 22.0 18.3 120 33.5 30.1 111
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Basin wide percent of average 99 91
LOWER GREEN RIVER
HAMS FORK 7840 4.2 1.8 233 12.7 15.7 81
HEWINTA 9519 6.9 5.2 133 20.1 18.9 106
HICKERSON PARK 9145 -M 2.6 * 11.1 11.2 99
HOLE-IN-ROCK 9150 .0 2.1 0 11.9 10.8 110
INDIAN CREEK 9425 -M 24.6 * -M 30.8 *
KELLEY R.S. 8180 12.2 9.9 123 21.1 24.7 85
STEEL CREEK PARK 10200 19.9 18.5 108 22.4 21.5 104
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Basin wide percent of average 115 97
UPPER BEAR RIVER
BUG LAKE 7950 14.9 12.0 124 19.8 23.6 84
HAYDEN FORK 9212 8.9 8.2 109 27.4 26.6 103
KELLEY R.S. 8180 12.2 9.9 123 21.1 24.7 85
LILY LAKE 9156 9.5 7.0 136 21.4 22.4 96
MONTE CRISTO 8960 27.2 23.6 115 30.4 32.0 95
SALT RIVER SUMMIT 7760 9.9 5.8 171 18.8 22.6 83
TRIAL LAKE 9992 21.3 23.9 89 28.6 31.1 92
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Basin wide percent of average 115 92
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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.