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: MAY 3 , 2010
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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 4.1 11.9 34 15.2 24.5 62
COTTONWOOD CREEK 7670 15.1 19.4 78 25.9 32.1 81
GRAND TARGHEE 9260 43.9 -M * 33.8 -M *
GRANITE CREEK 6770 4.9 12.5 39 14.1 22.5 63
GRASSY LAKE 7265 20.1 33.0 61 30.0 41.0 73
GROS VENTRE SUMMIT 8750 8.3 13.1 63 10.5 15.3 69
GUNSIGHT PASS 9820 10.1 -M * 13.2 -M *
LEWIS LAKE DIVIDE 7850 17.7 34.3 52 25.0 41.8 60
PHILLIPS BENCH 8200 18.0 29.2 62 23.8 33.2 72
SALT RIVER SUMMIT 7760 7.3 10.3 71 14.7 21.7 68
SNAKE RIVER STATION 6920 1.9 11.8 16 18.9 25.6 74
SPRING CREEK DIVIDE 9000 20.5 28.4 72 20.9 30.3 69
THUMB DIVIDE 7980 7.1 14.6 49 15.8 22.1 71
TOGWOTEE PASS 9580 21.0 28.0 75 20.7 29.1 71
TWO OCEAN PLATEAU 9240 24.8 31.8 78 21.0 32.2 65
WILLOW CREEK 8380 20.7 30.4 68 32.6 37.9 86
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Basin wide percent of average 62 71
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.6 25.9 64 16.1 23.6 68
BLACK BEAR 8170 27.5 39.8 69 30.5 46.0 66
CANYON 7870 7.3 11.0 66 13.4 17.8 75
FISHER CREEK 9100 25.1 37.7 67 27.1 42.1 64
MADISON PLATEAU 7750 16.3 24.0 68 23.7 30.5 78
NORTHEAST ENTRANCE 7350 .0 6.7 0 10.4 14.9 70
PARKER PEAK 9400 19.6 24.5 80 15.4 19.6 79
SYLVAN LAKE 8420 12.9 23.5 55 20.8 24.8 84
THUMB DIVIDE 7980 7.1 14.6 49 15.8 22.1 71
TWO OCEAN PLATEAU 9240 24.8 31.8 78 21.0 32.2 65
WHISKEY CREEK 6800 9.2 14.9 62 15.3 24.3 63
WHITE MILL 8700 17.7 26.3 67 18.5 31.3 59
WOLVERINE 7650 .0 6.9 0 8.8 15.3 58
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Basin wide percent of average 64 69
WIND RIVER
BURROUGHS CREEK 8750 9.7 13.4 72 10.5 19.4 54
COLD SPRINGS 9630 6.2 4.8 129 12.8 14.0 91
DEER PARK 9700 18.1 18.5 98 23.0 27.1 85
HOBBS PARK 10100 19.6 18.0 109 20.7 17.1 121
LITTLE WARM 9370 8.1 10.8 75 11.4 16.9 67
SOUTH PASS 9040 15.4 17.8 87 20.5 22.8 90
ST. LAWRENCE ALT 8620 6.0 6.0 100 13.8 12.2 113
TOGWOTEE PASS 9580 21.0 28.0 75 20.7 29.1 71
TOWNSEND CREEK 8700 11.5 8.8 131 18.5 15.6 119
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Basin wide percent of average 92 87
BIGHORN BASIN
BALD MTN. 9380 16.3 23.5 69 13.4 21.5 62
BEAR TRAP MEADOW 8200 4.1 2.3 178 10.2 11.0 93
BLACKWATER 9780 19.9 28.9 69 19.0 24.8 77
BONE SPRINGS DIV 9350 12.6 18.3 69 13.1 18.4 71
EVENING STAR 9200 19.1 33.3 57 23.9 30.0 80
GRAVE SPRINGS 8550 9.3 11.0 85 13.1 13.2 99
KIRWIN 9550 10.5 12.9 81 12.4 14.3 87
MARQUETTE 8760 7.8 11.2 70 11.7 13.8 85
MIDDLE POWDER 7760 11.6 14.2 82 10.9 15.9 69
OWL CREEK 8975 .7 3.9 18 7.5 8.3 90
POWDER RIVER PASS 9480 8.3 10.5 79 13.5 15.9 85
SHELL CREEK 9580 14.2 16.8 85 13.7 16.9 81
SYLVAN LAKE 8420 12.9 23.5 55 20.8 24.8 84
SYLVAN ROAD 7120 .8 7.8 10 14.8 20.6 72
TIMBER CREEK 7950 1.3 4.8 27 8.3 10.6 78
YOUNTS PEAK 8350 11.0 18.1 61 11.6 18.9 61
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Basin wide percent of average 67 78
SHOSHONE RIVER
BLACKWATER 9780 19.9 28.9 69 19.0 24.8 77
EVENING STAR 9200 19.1 33.3 57 23.9 30.0 80
KIRWIN 9550 10.5 12.9 81 12.4 14.3 87
MARQUETTE 8760 7.8 11.2 70 11.7 13.8 85
SYLVAN LAKE 8420 12.9 23.5 55 20.8 24.8 84
SYLVAN ROAD 7120 .8 7.8 10 14.8 20.6 72
YOUNTS PEAK 8350 11.0 18.1 61 11.6 18.9 61
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Basin wide percent of average 60 78
POWDER-TONGUE
BEAR TRAP MEADOW 8200 4.1 2.3 178 10.2 11.0 93
BIG GOOSE 7990 8.8 11.5 77 12.8 13.0 98
BONE SPRINGS DIV 9350 12.6 18.3 69 13.1 18.4 71
BURGESS JUNCTION 7880 12.1 13.1 92 13.6 15.5 88
CLOUD PEAK RESERVOIR 9860 14.3 16.2 88 14.4 17.3 83
DOME LAKE 8880 9.1 13.3 68 14.5 16.9 86
GRAVE SPRINGS 8550 9.3 11.0 85 13.1 13.2 99
HANSEN SAWMILL 8360 2.8 4.7 60 9.3 11.1 84
MIDDLE POWDER 7760 11.6 14.2 82 10.9 15.9 69
POWDER RIVER PASS 9480 8.3 10.5 79 13.5 15.9 85
SUCKER CREEK 8880 13.3 12.9 103 17.2 17.6 98
TIE CREEK 6870 1.3 3.9 33 12.7 13.6 93
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Basin wide percent of average 82 87
BELLE FOURCHE
BLIND PARK 6890 1.6 4.0 40 15.1 14.3 106
COLE CANYON 5910 1.6 4.5 36 12.7 9.6 132
NORTH RAPID CREEK 6130 .6 3.4 18 13.6 11.5 118
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Basin wide percent of average 32 117
UPPER N. PLATTE RIVER
COLUMBINE 9160 18.0 20.5 88 26.6 29.3 91
DIVIDE PEAK 8880 20.9 19.0 110 27.7 24.4 114
ELK RIVER 8700 15.0 14.5 103 23.8 23.2 103
JOE WRIGHT 10120 22.9 25.1 91 27.0 30.3 89
NORTH FRENCH CREEK 10130 40.4 34.5 117 40.5 29.9 135
OLD BATTLE 10000 38.4 37.0 104 41.7 40.1 104
SAGE CREEK BASIN 7850 10.1 11.0 92 15.2 14.2 107
SOUTH BRUSH CREEK 8440 12.3 10.8 114 23.1 20.3 114
TOWER 10500 40.1 52.3 77 38.3 45.3 85
WEBBER SPRINGS 9250 23.0 24.8 93 32.6 31.3 104
WILLOW CREEK PASS 9540 12.5 14.1 89 15.3 15.8 97
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Basin wide percent of average 96 103
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.9 28.1 85 26.5 27.1 98
CASPER MTN. 7900 15.7 16.9 93 18.0 19.7 91
DEADMAN HILL 10220 27.6 19.7 140 23.9 21.1 113
DEER PARK 9700 18.1 18.5 98 23.0 27.1 85
LAPRELE CREEK 8375 7.6 6.9 110 16.4 16.6 99
RENO HILL 8400 17.7 14.5 122 23.1 20.4 113
ROACH 9700 20.6 18.3 113 26.1 22.6 115
SAND LAKE 10050 36.3 37.0 98 36.8 29.5 125
SOUTH PASS 9040 15.4 17.8 87 20.5 22.8 90
WINDY PEAK 7900 8.5 4.7 181 15.4 13.6 113
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Basin wide percent of average 105 104
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.6 4.3 60 17.8 18.7 95
DIVIDE PEAK 8880 20.9 19.0 110 27.7 24.4 114
OLD BATTLE 10000 38.4 37.0 104 41.7 40.1 104
SANDSTONE RS 8150 9.0 9.1 99 20.4 22.0 93
WHISKEY PARK 8950 26.6 30.4 88 35.7 34.0 105
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Basin wide percent of average 98 103
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.3 13.2 63 11.6 16.0 73
BLIND BULL SUM 8650 19.5 27.7 70 14.7 25.3 58
EAST RIM DIVIDE 7930 .6 13.0 5 8.5 14.0 61
ELKHART PARK G.S. 9400 7.2 12.6 57 10.6 16.1 66
GROS VENTRE SUMMIT 8750 8.3 13.1 63 10.5 15.3 69
GUNSIGHT PASS 9820 10.1 -M * 13.2 -M *
KENDALL R.S. 7740 .2 9.6 2 9.8 16.6 59
LOOMIS PARK 8240 4.9 14.0 35 12.3 20.0 62
NEW FORK LAKE 8340 1.6 8.2 20 7.6 13.5 56
POCKET CREEK 9360 7.7 -M * 13.3 -M *
SNIDER BASIN 8060 6.8 12.4 55 13.0 18.6 70
SPRING CREEK DIVIDE 9000 20.5 28.4 72 20.9 30.3 69
TRIPLE PEAK 8500 15.2 23.4 65 23.4 28.8 81
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Basin wide percent of average 53 67
LOWER GREEN RIVER
HAMS FORK 7840 1.6 5.6 29 11.5 14.8 78
HEWINTA 9519 7.5 9.0 83 15.5 17.9 87
HICKERSON PARK 9145 5.9 5.4 109 13.4 10.3 130
HOLE-IN-ROCK 9150 3.2 4.5 71 12.5 9.8 128
INDIAN CREEK 9425 19.1 28.1 68 19.6 29.6 66
KELLEY R.S. 8180 9.0 13.8 65 16.3 23.7 69
STEEL CREEK PARK 10200 18.4 18.7 98 19.4 20.3 96
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Basin wide percent of average 76 86
UPPER BEAR RIVER
BUG LAKE 7950 11.6 17.6 66 17.2 22.5 76
HAYDEN FORK 9212 8.2 12.6 65 21.6 25.3 85
KELLEY R.S. 8180 9.0 13.8 65 16.3 23.7 69
LILY LAKE 9156 11.0 10.8 102 17.8 21.2 84
MONTE CRISTO 8960 17.0 28.0 61 21.7 30.4 71
SALT RIVER SUMMIT 7760 7.3 10.3 71 14.7 21.7 68
TRIAL LAKE 9992 20.1 26.4 76 19.3 29.6 65
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Basin wide percent of average 70 74
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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.