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 19 , 2009
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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 .0 5.2 0 24.4 25.9 94
COTTONWOOD CREEK 7670 17.1 12.5 137 38.4 34.2 112
GRAND TARGHEE 9260 43.9 -M * 42.5 -M *
GRANITE CREEK 6770 2.9 6.7 43 25.7 23.8 108
GRASSY LAKE 7265 20.4 24.7 83 43.2 43.3 100
GROS VENTRE SUMMIT 8750 7.9 8.9 89 19.4 16.6 117
GUNSIGHT PASS 9820 15.9 -M * 21.0 -M *
LEWIS LAKE DIVIDE 7850 30.8 27.3 113 42.3 43.8 97
PHILLIPS BENCH 8200 23.9 22.5 106 36.3 35.1 103
SALT RIVER SUMMIT 7760 2.8 3.4 82 20.3 23.1 88
SNAKE RIVER STATION 6920 .3 4.2 7 28.8 27.2 106
SPRING CREEK DIVIDE 9000 27.1 23.3 116 32.8 31.9 103
THUMB DIVIDE 7980 11.8 8.4 140 27.6 23.7 116
TOGWOTEE PASS 9580 31.1 26.8 116 36.5 31.2 117
TWO OCEAN PLATEAU 9240 45.9 30.1 152 37.8 34.5 110
WILLOW CREEK 8380 26.7 23.6 113 48.5 40.6 119
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Basin wide percent of average 109 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 26.3 25.1 105 27.5 25.5 108
BLACK BEAR 8170 38.9 35.3 110 45.3 48.4 94
CANYON 7870 9.8 5.9 166 20.1 19.2 105
FISHER CREEK 9100 43.6 35.7 122 45.0 44.6 101
MADISON PLATEAU 7750 20.8 18.0 116 32.1 32.5 99
NORTHEAST ENTRANCE 7350 .0 2.2 0 17.9 16.3 110
PARKER PEAK 9400 29.1 23.6 123 24.5 21.6 113
SYLVAN LAKE 8420 -M 19.3 * 30.6 27.0 113
THUMB DIVIDE 7980 11.8 8.4 140 27.6 23.7 116
TWO OCEAN PLATEAU 9240 45.9 30.1 152 37.8 34.5 110
WHISKEY CREEK 6800 12.8 8.2 156 26.5 25.9 102
WHITE MILL 8700 28.5 23.9 119 31.6 33.5 94
WOLVERINE 7650 .0 2.0 0 17.2 17.0 101
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Basin wide percent of average 122 104
WIND RIVER
BURROUGHS CREEK 8750 14.8 9.6 154 21.8 21.2 103
COLD SPRINGS 9630 .3 2.8 11 15.7 15.8 99
DEER PARK 9700 11.3 17.1 66 23.0 29.2 79
HOBBS PARK 10100 14.9 16.2 92 21.1 19.3 109
LITTLE WARM 9370 7.2 6.8 106 19.8 18.7 106
SOUTH PASS 9040 8.0 12.6 63 20.0 24.8 81
ST. LAWRENCE ALT 8620 .1 2.9 3 14.6 14.0 104
TOGWOTEE PASS 9580 31.1 26.8 116 36.5 31.2 117
TOWNSEND CREEK 8700 2.2 5.0 44 17.3 17.5 99
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Basin wide percent of average 90 99
BIGHORN BASIN
BALD MTN. 9380 20.8 22.5 92 20.0 23.8 84
BEAR TRAP MEADOW 8200 .1 .4 25 12.4 12.8 97
BLACKWATER 9780 32.4 28.8 112 31.0 27.0 115
BONE SPRINGS DIV 9350 16.5 15.5 106 19.1 20.6 93
EVENING STAR 9200 30.6 31.8 96 40.0 32.4 123
GRAVE SPRINGS 8550 3.9 6.2 63 12.4 14.9 83
KIRWIN 9550 11.4 10.4 110 19.9 16.1 124
MARQUETTE 8760 5.0 8.3 60 13.6 16.2 84
MIDDLE POWDER 7760 7.1 9.6 74 13.2 17.8 74
OWL CREEK 8975 .1 1.9 5 10.3 9.8 105
POWDER RIVER PASS 9480 9.7 7.1 137 19.5 18.0 108
SHELL CREEK 9580 18.4 15.8 116 20.3 19.0 107
SYLVAN LAKE 8420 -M 19.3 * 30.6 27.0 113
SYLVAN ROAD 7120 .2 2.0 10 25.3 22.1 114
TIMBER CREEK 7950 .2 1.9 11 11.9 12.8 93
YOUNTS PEAK 8350 17.7 14.3 124 20.8 20.6 101
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Basin wide percent of average 99 103
SHOSHONE RIVER
BLACKWATER 9780 32.4 28.8 112 31.0 27.0 115
EVENING STAR 9200 30.6 31.8 96 40.0 32.4 123
KIRWIN 9550 11.4 10.4 110 19.9 16.1 124
MARQUETTE 8760 5.0 8.3 60 13.6 16.2 84
SYLVAN LAKE 8420 -M 19.3 * 30.6 27.0 113
SYLVAN ROAD 7120 .2 2.0 10 25.3 22.1 114
YOUNTS PEAK 8350 17.7 14.3 124 20.8 20.6 101
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Basin wide percent of average 102 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .4 25 12.4 12.8 97
BIG GOOSE 7990 6.7 8.4 80 16.6 15.1 110
BONE SPRINGS DIV 9350 16.5 15.5 106 19.1 20.6 93
BURGESS JUNCTION 7880 9.7 8.9 109 16.0 17.3 92
CLOUD PEAK RESERVOIR 9860 17.2 14.2 121 21.9 19.8 111
DOME LAKE 8880 7.1 9.3 76 19.7 19.1 103
GRAVE SPRINGS 8550 3.9 6.2 63 12.4 14.9 83
HANSEN SAWMILL 8360 -M 1.7 * 13.3 12.7 105
MIDDLE POWDER 7760 7.1 9.6 74 13.2 17.8 74
POWDER RIVER PASS 9480 9.7 7.1 137 19.5 18.0 108
SUCKER CREEK 8880 12.2 9.1 134 21.6 19.9 109
TIE CREEK 6870 .0 1.0 0 17.7 15.7 113
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Basin wide percent of average 101 100
BELLE FOURCHE
BLIND PARK 6890 -M .0 * 18.1 16.3 111
COLE CANYON 5910 .1 .4 25 15.7 11.5 137
NORTH RAPID CREEK 6130 .0 .3 0 17.6 12.9 136
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Basin wide percent of average 14 126
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 10.9 1 33.2 31.0 107
DIVIDE PEAK 8880 11.7 11.0 106 33.4 26.2 127
ELK RIVER 8700 .1 6.0 2 25.3 24.8 102
JOE WRIGHT 10120 20.1 23.1 87 34.9 32.9 106
NORTH FRENCH CREEK 10130 -M 32.2 * -M 32.5 *
OLD BATTLE 10000 36.5 34.3 106 47.4 42.6 111
SAGE CREEK BASIN 7850 .0 6.4 0 19.3 15.2 127
SOUTH BRUSH CREEK 8440 .0 5.5 0 22.8 22.3 102
TOWER 10500 44.6 50.7 88 50.9 48.2 106
WEBBER SPRINGS 9250 13.3 16.0 83 35.8 33.3 108
WILLOW CREEK PASS 9540 5.3 9.9 54 16.1 17.4 93
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Basin wide percent of average 76 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.8 21.3 79 28.4 29.6 96
CASPER MTN. 7900 5.5 10.2 54 17.3 22.3 78
DEADMAN HILL 10220 16.8 17.2 98 23.7 23.2 102
DEER PARK 9700 11.3 17.1 66 23.0 29.2 79
LAPRELE CREEK 8375 .0 2.9 0 16.8 18.6 90
RENO HILL 8400 7.8 8.4 93 21.6 23.0 94
ROACH 9700 7.9 12.0 66 24.2 24.8 98
SAND LAKE 10050 32.2 34.5 93 37.0 32.3 115
SOUTH PASS 9040 8.0 12.6 63 20.0 24.8 81
WINDY PEAK 7900 .6 1.2 50 15.9 15.6 102
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Basin wide percent of average 78 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 22.9 20.0 114
DIVIDE PEAK 8880 11.7 11.0 106 33.4 26.2 127
OLD BATTLE 10000 36.5 34.3 106 47.4 42.6 111
SANDSTONE RS 8150 .1 2.8 4 25.3 23.6 107
WHISKEY PARK 8950 -M 24.8 * 40.7 36.4 112
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Basin wide percent of average 100 114
UPPER GREEN RIVER
BIG SANDY OPENING 9080 4.3 7.8 55 16.8 17.5 96
BLIND BULL SUM 8650 30.5 24.0 127 25.6 26.9 95
EAST RIM DIVIDE 7930 .0 8.0 0 14.8 15.1 98
ELKHART PARK G.S. 9400 9.9 8.5 116 19.0 17.7 107
GROS VENTRE SUMMIT 8750 7.9 8.9 89 19.4 16.6 117
GUNSIGHT PASS 9820 15.9 -M * 21.0 -M *
KENDALL R.S. 7740 .0 2.1 0 17.4 17.7 98
LOOMIS PARK 8240 3.8 8.5 45 22.3 21.4 104
NEW FORK LAKE 8340 .0 2.7 0 15.3 14.8 103
SNIDER BASIN 8060 1.6 6.3 25 18.0 19.6 92
SPRING CREEK DIVIDE 9000 27.1 23.3 116 32.8 31.9 103
TRIPLE PEAK 8500 15.1 15.2 99 33.7 30.6 110
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Basin wide percent of average 87 102
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 15.9 16.1 99
HEWINTA 9519 .0 3.5 0 17.3 19.3 90
HICKERSON PARK 9145 .0 1.4 0 13.4 11.6 116
HOLE-IN-ROCK 9150 .0 1.2 0 12.7 11.2 113
INDIAN CREEK 9425 -M 22.4 * 27.5 31.3 88
KELLEY R.S. 8180 5.9 7.8 76 22.2 25.1 88
STEEL CREEK PARK 10200 10.9 17.4 63 21.0 21.9 96
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Basin wide percent of average 54 95
UPPER BEAR RIVER
BUG LAKE 7950 5.7 9.2 62 22.0 24.0 92
HAYDEN FORK 9212 .0 6.1 0 27.3 27.1 101
KELLEY R.S. 8180 5.9 7.8 76 22.2 25.1 88
LILY LAKE 9156 .0 5.3 0 21.5 22.8 94
MONTE CRISTO 8960 15.0 21.1 71 32.0 32.6 98
SALT RIVER SUMMIT 7760 2.8 3.4 82 20.3 23.1 88
TRIAL LAKE 9992 12.7 21.9 58 29.8 31.7 94
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Basin wide percent of average 56 94
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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.