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 FRIDAY: MAY 7 , 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 4.5 10.4 43 16.0 24.8 65
COTTONWOOD CREEK 7670 15.6 17.9 87 26.5 32.6 81
GRAND TARGHEE 9260 44.5 -M * 34.6 -M *
GRANITE CREEK 6770 4.7 11.2 42 14.8 22.8 65
GRASSY LAKE 7265 20.7 31.3 66 30.5 41.6 73
GROS VENTRE SUMMIT 8750 8.7 12.3 71 11.1 15.7 71
GUNSIGHT PASS 9820 10.8 -M * 13.7 -M *
LEWIS LAKE DIVIDE 7850 18.6 33.0 56 25.7 42.3 61
PHILLIPS BENCH 8200 18.8 28.0 67 24.5 33.7 73
SALT RIVER SUMMIT 7760 7.3 8.8 83 15.0 22.0 68
SNAKE RIVER STATION 6920 1.7 10.1 17 19.5 26.0 75
SPRING CREEK DIVIDE 9000 21.2 27.7 77 21.5 30.7 70
THUMB DIVIDE 7980 7.8 13.2 59 16.2 22.5 72
TOGWOTEE PASS 9580 22.7 28.1 81 20.6 29.6 70
TWO OCEAN PLATEAU 9240 26.2 31.7 83 21.9 32.8 67
WILLOW CREEK 8380 21.9 29.2 75 33.8 38.6 88
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Basin wide percent of average 68 72
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 17.5 25.8 68 17.0 24.1 71
BLACK BEAR 8170 28.0 39.0 72 31.2 46.6 67
CANYON 7870 7.8 9.8 80 13.9 18.2 76
FISHER CREEK 9100 26.7 37.7 71 28.6 42.7 67
MADISON PLATEAU 7750 17.1 22.7 75 24.5 31.0 79
NORTHEAST ENTRANCE 7350 1.3 5.7 23 11.2 15.2 74
PARKER PEAK 9400 21.1 24.4 86 16.1 20.1 80
SYLVAN LAKE 8420 13.4 22.7 59 21.4 25.4 84
THUMB DIVIDE 7980 7.8 13.2 59 16.2 22.5 72
TWO OCEAN PLATEAU 9240 26.2 31.7 83 21.9 32.8 67
WHISKEY CREEK 6800 9.8 13.4 73 16.1 24.7 65
WHITE MILL 8700 19.2 26.0 74 19.8 31.9 62
WOLVERINE 7650 .2 5.9 3 9.2 15.7 59
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Basin wide percent of average 71 70
WIND RIVER
BURROUGHS CREEK 8750 10.3 12.3 84 11.2 19.9 56
COLD SPRINGS 9630 6.1 4.6 133 13.8 14.5 95
DEER PARK 9700 18.7 16.7 112 23.7 27.6 86
HOBBS PARK 10100 20.5 17.6 116 21.6 17.7 122
LITTLE WARM 9370 8.5 9.8 87 12.1 17.4 70
SOUTH PASS 9040 15.5 16.9 92 21.0 23.4 90
ST. LAWRENCE ALT 8620 5.8 5.3 109 14.7 12.7 116
TOGWOTEE PASS 9580 22.7 28.1 81 20.6 29.6 70
TOWNSEND CREEK 8700 11.8 7.8 151 18.8 16.2 116
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Basin wide percent of average 101 88
BIGHORN BASIN
BALD MTN. 9380 17.3 23.4 74 14.5 22.1 66
BEAR TRAP MEADOW 8200 4.1 1.8 228 11.0 11.5 96
BLACKWATER 9780 21.6 28.7 75 20.3 25.4 80
BONE SPRINGS DIV 9350 13.9 17.6 79 13.9 19.0 73
EVENING STAR 9200 20.7 33.2 62 25.2 30.7 82
GRAVE SPRINGS 8550 10.3 10.1 102 14.2 13.8 103
KIRWIN 9550 11.2 12.6 89 13.3 14.8 90
MARQUETTE 8760 8.3 10.6 78 12.4 14.4 86
MIDDLE POWDER 7760 12.5 13.3 94 11.5 16.4 70
OWL CREEK 8975 .7 3.5 20 8.1 8.7 93
POWDER RIVER PASS 9480 8.9 9.6 93 14.2 16.5 86
SHELL CREEK 9580 15.9 16.7 95 15.4 17.5 88
SYLVAN LAKE 8420 13.4 22.7 59 21.4 25.4 84
SYLVAN ROAD 7120 1.1 6.5 17 15.5 21.0 74
TIMBER CREEK 7950 1.7 4.2 40 9.4 11.2 84
YOUNTS PEAK 8350 12.0 17.6 68 12.4 19.3 64
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Basin wide percent of average 75 81
SHOSHONE RIVER
BLACKWATER 9780 21.6 28.7 75 20.3 25.4 80
EVENING STAR 9200 20.7 33.2 62 25.2 30.7 82
KIRWIN 9550 11.2 12.6 89 13.3 14.8 90
MARQUETTE 8760 8.3 10.6 78 12.4 14.4 86
SYLVAN LAKE 8420 13.4 22.7 59 21.4 25.4 84
SYLVAN ROAD 7120 1.1 6.5 17 15.5 21.0 74
YOUNTS PEAK 8350 12.0 17.6 68 12.4 19.3 64
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Basin wide percent of average 67 80
POWDER-TONGUE
BEAR TRAP MEADOW 8200 4.1 1.8 228 11.0 11.5 96
BIG GOOSE 7990 10.0 10.8 93 14.1 13.6 104
BONE SPRINGS DIV 9350 13.9 17.6 79 13.9 19.0 73
BURGESS JUNCTION 7880 13.1 12.3 107 14.6 16.0 91
CLOUD PEAK RESERVOIR 9860 16.0 15.8 101 15.7 17.9 88
DOME LAKE 8880 11.0 12.4 89 16.0 17.5 91
GRAVE SPRINGS 8550 10.3 10.1 102 14.2 13.8 103
HANSEN SAWMILL 8360 2.8 4.1 68 10.6 11.5 92
MIDDLE POWDER 7760 12.5 13.3 94 11.5 16.4 70
POWDER RIVER PASS 9480 8.9 9.6 93 14.2 16.5 86
SUCKER CREEK 8880 14.4 11.9 121 18.3 18.2 101
TIE CREEK 6870 2.5 3.2 78 14.2 14.2 100
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Basin wide percent of average 97 90
BELLE FOURCHE
BLIND PARK 6890 1.8 3.0 60 15.8 14.8 107
COLE CANYON 5910 2.2 2.8 79 13.8 10.2 135
NORTH RAPID CREEK 6130 .3 2.1 14 14.2 11.9 119
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Basin wide percent of average 54 119
UPPER N. PLATTE RIVER
COLUMBINE 9160 18.1 18.6 97 27.0 29.8 91
DIVIDE PEAK 8880 21.5 17.4 124 28.6 24.9 115
ELK RIVER 8700 14.9 12.5 119 24.3 23.6 103
JOE WRIGHT 10120 23.3 25.0 93 27.7 31.0 89
NORTH FRENCH CREEK 10130 42.4 34.5 123 42.1 30.6 138
OLD BATTLE 10000 40.1 37.3 108 43.3 40.7 106
SAGE CREEK BASIN 7850 8.8 10.1 87 15.7 14.4 109
SOUTH BRUSH CREEK 8440 13.1 9.6 136 24.2 20.8 116
TOWER 10500 40.7 52.4 78 40.0 46.2 87
WEBBER SPRINGS 9250 24.0 23.3 103 33.9 31.8 107
WILLOW CREEK PASS 9540 12.6 13.7 92 15.5 16.2 96
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Basin wide percent of average 102 104
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.0 27.2 92 27.8 27.8 100
CASPER MTN. 7900 15.5 15.7 99 18.3 20.4 90
DEADMAN HILL 10220 -M 19.6 * -M 21.7 *
DEER PARK 9700 18.7 16.7 112 23.7 27.6 86
LAPRELE CREEK 8375 7.5 5.9 127 17.1 17.1 100
RENO HILL 8400 17.5 13.3 132 23.4 21.1 111
ROACH 9700 21.1 17.3 122 26.9 23.2 116
SAND LAKE 10050 38.6 37.0 104 38.4 30.3 127
SOUTH PASS 9040 15.5 16.9 92 21.0 23.4 90
WINDY PEAK 7900 8.2 3.7 222 16.1 14.1 114
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Basin wide percent of average 109 104
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.1 3.2 34 18.3 19.1 96
DIVIDE PEAK 8880 21.5 17.4 124 28.6 24.9 115
OLD BATTLE 10000 40.1 37.3 108 43.3 40.7 106
SANDSTONE RS 8150 8.9 7.5 119 21.2 22.4 95
WHISKEY PARK 8950 27.4 29.7 92 36.9 34.7 106
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Basin wide percent of average 104 105
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.6 12.2 70 11.8 16.4 72
BLIND BULL SUM 8650 20.4 27.1 75 15.5 25.7 60
EAST RIM DIVIDE 7930 .3 12.1 2 8.7 14.2 61
ELKHART PARK G.S. 9400 7.2 11.8 61 11.0 16.5 67
GROS VENTRE SUMMIT 8750 8.7 12.3 71 11.1 15.7 71
GUNSIGHT PASS 9820 10.8 -M * 13.7 -M *
KENDALL R.S. 7740 .1 8.0 1 10.2 16.9 60
LOOMIS PARK 8240 5.0 12.9 39 12.7 20.4 62
NEW FORK LAKE 8340 1.6 7.0 23 7.8 13.8 57
POCKET CREEK 9360 7.8 -M * 13.5 -M *
SNIDER BASIN 8060 6.8 11.2 61 13.5 18.9 71
SPRING CREEK DIVIDE 9000 21.2 27.7 77 21.5 30.7 70
TRIPLE PEAK 8500 16.2 21.9 74 24.4 29.3 83
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Basin wide percent of average 59 68
LOWER GREEN RIVER
HAMS FORK 7840 .6 4.3 14 11.9 15.2 78
HEWINTA 9519 7.6 7.6 100 15.9 18.3 87
HICKERSON PARK 9145 3.7 4.4 84 13.3 10.6 125
HOLE-IN-ROCK 9150 .3 3.6 8 12.6 10.2 124
INDIAN CREEK 9425 19.6 27.1 72 19.9 30.0 66
KELLEY R.S. 8180 9.0 12.5 72 16.3 24.0 68
STEEL CREEK PARK 10200 19.0 18.9 101 20.0 20.8 96
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Basin wide percent of average 76 85
UPPER BEAR RIVER
BUG LAKE 7950 11.5 15.7 73 17.4 22.9 76
HAYDEN FORK 9212 7.7 11.1 69 22.1 25.7 86
KELLEY R.S. 8180 9.0 12.5 72 16.3 24.0 68
LILY LAKE 9156 10.8 9.5 114 18.2 21.6 84
MONTE CRISTO 8960 16.8 26.6 63 22.0 31.0 71
SALT RIVER SUMMIT 7760 7.3 8.8 83 15.0 22.0 68
TRIAL LAKE 9992 20.3 25.9 78 19.7 30.1 65
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Basin wide percent of average 76 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.