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 9 , 2003
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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 7.1 9.0 79 24.5 25.1 98
COTTONWOOD CREEK 7600 14.2 16.4 87 27.7 32.9 84
GRANITE CREEK 6770 2.5 9.9 25 18.5 23.0 80
GRASSY LAKE 7265 30.0 29.5 102 38.9 42.0 93
GROS VENTRE SUMMIT 8775 9.5 11.4 83 13.7 15.9 86
LEWIS LAKE DIVIDE 7860 32.3 31.4 103 34.9 42.6 82
PHILLIPS BENCH 8200 21.9 26.4 83 27.1 34.0 80
SALT RIVER SUMMIT 7600 1.7 7.3 23 15.5 22.2 70
SNAKE RIVER STATION 6920 3.3 8.5 39 24.6 26.2 94
SPRING CREEK DIVIDE 9000 -M 26.4 * -M 30.9 *
THUMB DIVIDE 7980 11.6 11.9 97 20.8 22.7 92
TOGWOTEE PASS 9580 25.9 27.6 94 27.4 30.0 91
TWO OCEAN PLATEAU 9360 37.5 31.2 120 30.6 33.2 92
WILLOW CREEK 8450 24.5 27.6 89 39.4 39.0 101
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Basin wide percent of average 89 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 30.4 25.7 118 26.7 24.4 109
BLACK BEAR 8170 41.2 38.0 108 39.7 47.0 84
CANYON 8090 12.8 8.9 144 18.6 18.4 101
FISHER CREEK 9100 41.5 37.1 112 39.8 43.1 92
MADISON PLATEAU 7750 22.0 21.5 102 26.8 31.4 85
NORTHEAST ENTRANCE 7350 2.9 4.9 59 16.2 15.5 105
PARKER PEAK 9400 29.8 24.2 123 24.7 20.5 120
SYLVAN LAKE 8420 23.2 21.8 106 29.1 25.8 113
THUMB DIVIDE 7980 11.6 11.9 97 20.8 22.7 92
TWO OCEAN PLATEAU 9360 37.5 31.2 120 30.6 33.2 92
WHISKEY CREEK 6800 11.0 12.1 91 21.3 25.0 85
WHITE MILL 8700 31.0 25.4 122 27.9 32.2 87
WOLVERINE 7650 1.4 4.9 29 14.3 16.0 89
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Basin wide percent of average 111 95
WIND RIVER
BURROUGHS CREEK 8750 16.5 11.8 140 21.5 20.2 106
COLD SPRINGS 9630 1.2 3.9 31 12.5 14.7 85
DEER PARK 9700 13.2 17.8 74 20.9 28.0 75
HOBBS PARK 10100 12.6 17.3 73 15.9 18.0 88
LITTLE WARM 9370 5.2 9.2 57 14.1 17.6 80
SOUTH PASS 9040 8.4 15.8 53 16.6 23.6 70
ST. LAWRENCE ALT 8620 .9 4.7 19 10.8 12.9 84
TOGWOTEE PASS 9580 25.9 27.6 94 27.4 30.0 91
TOWNSEND CREEK 8700 2.7 7.2 38 14.3 16.4 87
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Basin wide percent of average 75 85
BIGHORN BASIN
BALD MTN. 9380 21.2 23.3 91 20.9 22.3 94
BEAR TRAP MEADOW 8200 1.7 1.5 113 11.7 11.8 99
BLACKWATER 9780 30.5 28.8 106 26.7 25.8 103
BONE SPRINGS DIV 9350 18.7 17.1 109 20.3 19.3 105
EVENING STAR 9200 33.7 32.8 103 37.4 31.1 120
GRAVE SPRINGS 8550 6.2 9.3 67 11.8 13.9 85
KIRWIN 9550 14.1 11.9 118 15.8 15.1 105
MARQUETTE 8760 15.8 9.9 160 18.8 14.8 127
MIDDLE POWDER 7760 8.7 12.5 70 10.9 16.7 65
OWL CREEK 8975 1.4 3.0 47 8.8 8.9 99
POWDER RIVER PASS 9480 9.6 9.2 104 16.2 16.8 96
SHELL CREEK 9580 16.7 16.5 101 17.3 17.8 97
SYLVAN LAKE 8420 23.2 21.8 106 29.1 25.8 113
SYLVAN ROAD 7120 8.7 5.0 174 21.0 21.2 99
TIMBER CREEK 7950 4.3 3.3 130 11.8 11.5 103
YOUNTS PEAK 8350 16.4 16.6 99 18.7 19.7 95
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Basin wide percent of average 104 102
SHOSHONE RIVER
BLACKWATER 9780 30.5 28.8 106 26.7 25.8 103
EVENING STAR 9200 33.7 32.8 103 37.4 31.1 120
KIRWIN 9550 14.1 11.9 118 15.8 15.1 105
MARQUETTE 8760 15.8 9.9 160 18.8 14.8 127
SYLVAN LAKE 8420 23.2 21.8 106 29.1 25.8 113
SYLVAN ROAD 7120 8.7 5.0 174 21.0 21.2 99
YOUNTS PEAK 8350 16.4 16.6 99 18.7 19.7 95
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Basin wide percent of average 112 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.7 1.5 113 11.7 11.8 99
BIG GOOSE 7990 11.4 10.2 112 17.2 13.8 125
BONE SPRINGS DIV 9350 18.7 17.1 109 20.3 19.3 105
BURGESS JUNCTION 7880 13.6 11.5 118 17.6 16.2 109
CLOUD PEAK RESERVOIR 9860 17.5 15.4 114 18.6 18.3 102
DOME LAKE 8880 12.0 11.7 103 19.4 17.8 109
GRAVE SPRINGS 8550 6.2 9.3 67 11.8 13.9 85
HANSEN SAWMILL 8360 3.1 3.4 91 14.0 11.8 119
MIDDLE POWDER 7760 8.7 12.5 70 10.9 16.7 65
POWDER RIVER PASS 9480 9.6 9.2 104 16.2 16.8 96
SUCKER CREEK 8880 14.8 11.4 130 20.5 18.5 111
TIE CREEK 6870 3.4 2.4 142 18.2 14.5 126
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Basin wide percent of average 104 104
BELLE FOURCHE
BLIND PARK 6890 .0 1.8 0 13.8 15.2 91
COLE CANYON 5910 .0 -M * 11.1 -M *
NORTH RAPID CREEK 6130 .0 2.0 0 12.1 12.1 100
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Basin wide percent of average 0 95
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.9 16.4 109 30.4 30.0 101
DIVIDE PEAK 8800 19.0 15.6 122 26.6 25.1 106
ELK RIVER 8700 12.4 10.8 115 24.4 23.8 103
JOE WRIGHT 10120 31.1 24.4 127 36.6 31.3 117
NORTH FRENCH CREEK 10100 37.0 33.8 109 36.4 30.9 118
OLD BATTLE 10000 36.5 36.1 101 40.3 41.0 98
SAGE CREEK BASIN 7850 .3 9.0 3 15.6 14.6 107
SOUTH BRUSH CREEK 8400 10.1 8.5 119 22.7 21.0 108
TOWER 10500 52.6 51.8 102 52.7 46.4 114
WEBBER SPRINGS 9200 17.1 21.1 81 30.3 32.0 95
WILLOW CREEK PASS 9540 21.4 12.5 171 19.9 16.5 121
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Basin wide percent of average 106 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 19.1 25.3 75 25.8 28.1 92
CASPER MTN. 7900 10.2 14.0 73 15.8 20.7 76
DEADMAN HILL 10220 19.7 18.7 105 24.0 22.0 109
DEER PARK 9700 13.2 17.8 74 20.9 28.0 75
LAPRELE CREEK 8320 4.9 5.1 96 15.9 17.4 91
RENO HILL 8400 13.9 11.8 118 19.6 21.4 92
ROACH 9700 17.2 15.6 110 24.0 23.4 103
SAND LAKE 10080 32.9 36.1 91 29.5 30.6 96
SOUTH PASS 9040 8.4 15.8 53 16.6 23.6 70
WINDY PEAK 7840 5.9 3.1 190 16.1 14.4 112
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Basin wide percent of average 89 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 2.3 4 19.6 19.2 102
DIVIDE PEAK 8800 19.0 15.6 122 26.6 25.1 106
OLD BATTLE 10000 36.5 36.1 101 40.3 41.0 98
SANDSTONE RS 8150 3.8 6.2 61 23.2 22.6 103
WHISKEY PARK 8950 30.6 28.2 109 34.0 34.8 98
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Basin wide percent of average 102 101
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.6 10.9 79 14.3 16.6 86
BLIND BULL SUM 8650 22.8 26.2 87 19.2 25.9 74
EAST RIM DIVIDE 7930 6.6 10.9 61 11.4 14.5 79
ELKHART PARK G.S. 9400 9.7 10.9 89 14.3 16.8 85
GROS VENTRE SUMMIT 8775 9.5 11.4 83 13.7 15.9 86
KENDALL R.S. 7740 .0 6.4 0 14.6 17.1 85
LOOMIS PARK 8240 6.9 11.7 59 18.2 20.6 88
NEW FORK LAKE 8340 3.2 5.8 55 -M 14.0 *
SNIDER BASIN 8250 4.1 9.8 42 14.6 19.0 77
SPRING CREEK DIVIDE 9000 -M 26.4 * -M 30.9 *
TRIPLE PEAK 8500 15.7 19.9 79 29.7 29.5 101
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Basin wide percent of average 70 85
LOWER GREEN RIVER
HAMS FORK 7840 .3 3.2 9 13.0 15.3 85
HEWINTA 9500 3.5 6.6 53 14.7 18.4 80
HICKERSON PARK 9150 .0 3.6 0 10.0 10.8 93
HOLE-IN-ROCK 9150 .3 3.0 10 10.9 10.3 106
INDIAN CREEK 9425 22.2 25.7 86 22.4 30.3 74
KELLEY R.S. 8180 7.8 11.2 70 15.9 24.3 65
STEEL CREEK PARK 10100 17.2 18.3 94 17.1 21.0 81
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Basin wide percent of average 72 80
UPPER BEAR RIVER
BUG LAKE 7950 10.4 13.9 75 18.8 23.1 81
HAYDEN FORK 9400 4.8 9.7 49 21.8 26.0 84
KELLEY R.S. 8180 7.8 11.2 70 15.9 24.3 65
LILY LAKE 9050 2.7 8.4 32 18.0 21.9 82
MONTE CRISTO 8960 10.6 25.1 42 25.0 31.3 80
SALT RIVER SUMMIT 7600 1.7 7.3 23 15.5 22.2 70
TRIAL LAKE 9960 14.1 24.6 57 21.3 30.4 70
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Basin wide percent of average 52 76
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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.