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 WEDNESDAY: MAY 11 , 2005
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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 .1 8.2 1 17.4 25.3 69
COTTONWOOD CREEK 7600 10.6 15.6 68 27.6 33.2 83
GRANITE CREEK 6770 1.4 9.2 15 18.3 23.2 79
GRASSY LAKE 7265 13.8 28.5 48 29.1 42.3 69
GROS VENTRE SUMMIT 8750 9.7 10.9 89 13.8 16.1 86
LEWIS LAKE DIVIDE 7850 14.9 30.6 49 25.7 42.8 60
PHILLIPS BENCH 8200 19.8 25.6 77 26.8 34.2 78
SALT RIVER SUMMIT 7600 6.9 6.5 106 20.7 22.4 92
SNAKE RIVER STATION 6920 .3 7.6 4 16.1 26.4 61
SPRING CREEK DIVIDE 9000 25.4 25.8 98 26.9 31.1 86
THUMB DIVIDE 7980 4.6 11.2 41 15.6 22.9 68
TOGWOTEE PASS 9580 18.6 27.5 68 20.6 30.2 68
TWO OCEAN PLATEAU 9240 26.6 31.0 86 22.4 33.5 67
WILLOW CREEK 8450 19.2 26.8 72 36.7 39.3 93
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Basin wide percent of average 65 75
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.7 25.6 69 17.2 24.6 70
BLACK BEAR 8170 33.3 37.5 89 35.7 47.3 75
CANYON 8090 3.6 8.3 43 12.6 18.6 68
FISHER CREEK 9100 24.9 36.9 67 28.9 43.4 67
MADISON PLATEAU 7750 16.5 20.8 79 24.5 31.7 77
NORTHEAST ENTRANCE 7350 .1 4.4 2 9.7 15.7 62
PARKER PEAK 9400 17.2 24.1 71 16.3 20.7 79
SYLVAN LAKE 8420 9.2 21.3 43 20.2 26.1 77
THUMB DIVIDE 7980 4.6 11.2 41 15.6 22.9 68
TWO OCEAN PLATEAU 9240 26.6 31.0 86 22.4 33.5 67
WHISKEY CREEK 6800 8.4 11.3 74 18.9 25.2 75
WHITE MILL 8700 18.3 25.2 73 18.9 32.5 58
WOLVERINE 7650 .2 4.3 5 9.9 16.2 61
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Basin wide percent of average 69 70
WIND RIVER
BURROUGHS CREEK 8750 11.1 11.3 98 14.1 20.4 69
COLD SPRINGS 9630 2.5 3.7 68 12.1 14.9 81
DEER PARK 9700 26.4 17.6 150 30.6 28.3 108
HOBBS PARK 10100 19.1 17.1 112 19.4 18.2 107
LITTLE WARM 9370 6.8 8.7 78 13.0 17.8 73
SOUTH PASS 9040 19.1 15.2 126 25.1 23.8 105
ST. LAWRENCE ALT 8620 3.6 4.4 82 12.9 13.1 98
TOGWOTEE PASS 9580 18.6 27.5 68 20.6 30.2 68
TOWNSEND CREEK 8700 8.0 6.7 119 18.3 16.6 110
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Basin wide percent of average 103 91
BIGHORN BASIN
BALD MTN. 9380 19.9 23.2 86 21.0 22.6 93
BEAR TRAP MEADOW 8200 .3 1.2 25 11.3 12.0 94
BLACKWATER 9780 17.8 28.8 62 18.0 26.1 69
BONE SPRINGS DIV 9350 18.3 16.8 109 21.6 19.6 110
EVENING STAR 9200 17.8 32.7 54 24.0 31.4 76
GRAVE SPRINGS 8550 4.9 8.8 56 11.7 14.1 83
KIRWIN 9550 10.4 11.6 90 13.2 15.3 86
MARQUETTE 8760 7.2 9.6 75 12.8 15.1 85
MIDDLE POWDER 7760 7.6 12.0 63 10.5 16.9 62
OWL CREEK 8975 -M 2.8 * 10.1 9.1 111
POWDER RIVER PASS 9480 8.1 8.8 92 17.1 17.0 101
SHELL CREEK 9580 19.2 16.4 117 19.1 18.0 106
SYLVAN LAKE 8420 9.2 21.3 43 20.2 26.1 77
SYLVAN ROAD 7120 .2 4.2 5 12.9 21.4 60
TIMBER CREEK 7950 1.6 2.9 55 9.9 11.8 84
YOUNTS PEAK 8350 10.2 16.2 63 14.4 19.9 72
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Basin wide percent of average 71 84
SHOSHONE RIVER
BLACKWATER 9780 17.8 28.8 62 18.0 26.1 69
EVENING STAR 9200 17.8 32.7 54 24.0 31.4 76
KIRWIN 9550 10.4 11.6 90 13.2 15.3 86
MARQUETTE 8760 7.2 9.6 75 12.8 15.1 85
SYLVAN LAKE 8420 9.2 21.3 43 20.2 26.1 77
SYLVAN ROAD 7120 .2 4.2 5 12.9 21.4 60
YOUNTS PEAK 8350 10.2 16.2 63 14.4 19.9 72
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Basin wide percent of average 59 74
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .3 1.2 25 11.3 12.0 94
BIG GOOSE 7990 10.3 9.8 105 17.3 14.0 124
BONE SPRINGS DIV 9350 18.3 16.8 109 21.6 19.6 110
BURGESS JUNCTION 7880 11.1 11.1 100 16.7 16.4 102
CLOUD PEAK RESERVOIR 9860 19.1 15.2 126 20.5 18.6 110
DOME LAKE 8880 11.2 11.3 99 19.6 18.0 109
GRAVE SPRINGS 8550 4.9 8.8 56 11.7 14.1 83
HANSEN SAWMILL 8360 1.4 3.0 47 14.2 12.0 118
MIDDLE POWDER 7760 7.6 12.0 63 10.5 16.9 62
POWDER RIVER PASS 9480 8.1 8.8 92 17.1 17.0 101
SUCKER CREEK 8880 14.2 11.0 129 21.3 18.7 114
TIE CREEK 6870 .2 2.0 10 16.7 14.7 114
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Basin wide percent of average 96 103
BELLE FOURCHE
BLIND PARK 6890 .0 1.2 0 12.1 15.4 79
COLE CANYON 5910 .0 3.7 0 10.6 -M *
NORTH RAPID CREEK 6130 .0 1.5 0 10.2 12.2 84
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Basin wide percent of average 0 81
UPPER N. PLATTE RIVER
COLUMBINE 9160 8.8 15.3 58 -M 30.2 *
DIVIDE PEAK 8860 16.4 14.7 112 28.0 25.3 111
ELK RIVER 8700 11.2 9.7 115 25.4 24.0 106
JOE WRIGHT 10120 22.9 24.2 95 26.7 31.6 84
NORTH FRENCH CREEK 10130 29.6 33.6 88 30.5 31.2 98
OLD BATTLE 9920 40.8 35.9 114 -M 41.3 *
SAGE CREEK BASIN 7850 .1 8.5 1 18.7 14.7 127
SOUTH BRUSH CREEK 8440 4.7 7.8 60 18.0 21.2 85
TOWER 10500 43.4 51.7 84 46.1 46.7 99
WEBBER SPRINGS 9250 20.0 20.1 100 31.9 32.3 99
WILLOW CREEK PASS 9540 16.1 12.1 133 16.1 16.7 96
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Basin wide percent of average 92 99
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10220 18.5 24.6 75 22.3 28.3 79
CASPER MTN. 7850 5.5 13.2 42 15.8 21.0 75
DEADMAN HILL 10220 17.5 18.5 95 18.4 22.2 83
DEER PARK 9700 26.4 17.6 150 30.6 28.3 108
LAPRELE CREEK 8375 .0 4.6 0 13.3 17.7 75
RENO HILL 8500 7.0 11.1 63 15.7 21.7 72
ROACH 9700 14.7 14.9 99 21.9 23.7 92
SAND LAKE 10050 27.1 35.9 75 28.1 30.9 91
SOUTH PASS 9040 19.1 15.2 126 25.1 23.8 105
WINDY PEAK 7900 .8 2.6 31 11.1 14.7 76
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Basin wide percent of average 86 87
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 1.7 0 19.0 19.3 98
DIVIDE PEAK 8860 16.4 14.7 112 28.0 25.3 111
OLD BATTLE 9920 40.8 35.9 114 -M 41.3 *
SANDSTONE RS 8150 3.0 5.4 56 23.1 22.8 101
WHISKEY PARK 8950 26.1 27.6 95 30.8 35.1 88
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Basin wide percent of average 101 98
UPPER GREEN RIVER
BIG SANDY OPENING 9080 14.2 10.3 138 18.5 16.8 110
BLIND BULL SUM 8900 19.4 25.8 75 19.7 26.1 75
EAST RIM DIVIDE 7930 .3 10.3 3 12.8 14.6 88
ELKHART PARK G.S. 9400 12.9 10.4 124 18.3 17.0 108
GROS VENTRE SUMMIT 8750 9.7 10.9 89 13.8 16.1 86
KENDALL R.S. 7740 .2 5.5 4 15.2 17.2 88
LOOMIS PARK 8240 6.3 11.0 57 19.1 20.7 92
NEW FORK LAKE 8340 5.7 5.1 112 13.9 14.2 98
SNIDER BASIN 8060 7.8 9.1 86 16.4 19.1 86
SPRING CREEK DIVIDE 9000 25.4 25.8 98 26.9 31.1 86
TRIPLE PEAK 8500 11.3 19.0 59 24.3 29.7 82
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Basin wide percent of average 79 89
LOWER GREEN RIVER
HAMS FORK 7840 1.3 2.5 52 17.9 15.4 116
HEWINTA 9500 2.6 5.9 44 15.6 18.6 84
HICKERSON PARK 9100 .0 3.1 0 13.2 11.0 120
HOLE-IN-ROCK 9150 .1 2.6 4 12.9 10.5 123
INDIAN CREEK 9425 32.5 25.0 130 30.1 30.5 99
KELLEY R.S. 8180 13.0 10.5 124 24.1 24.4 99
STEEL CREEK PARK 10100 19.9 18.2 109 20.3 21.2 96
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Basin wide percent of average 102 102
UPPER BEAR RIVER
BUG LAKE 7950 18.4 12.9 143 28.2 23.3 121
HAYDEN FORK 9100 8.9 8.9 100 29.8 26.2 114
KELLEY R.S. 8180 13.0 10.5 124 24.1 24.4 99
LILY LAKE 9050 9.5 7.7 123 -M 22.1 *
MONTE CRISTO 8960 31.2 24.3 128 36.3 31.5 115
SALT RIVER SUMMIT 7600 6.9 6.5 106 20.7 22.4 92
TRIAL LAKE 9960 34.4 24.1 143 36.3 30.7 118
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Basin wide percent of average 129 111
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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.