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 13 , 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 5.6 7.3 77 25.4 25.4 100
COTTONWOOD CREEK 7600 13.6 14.7 93 28.2 33.4 84
GRANITE CREEK 6770 .3 8.5 4 19.2 23.4 82
GRASSY LAKE 7265 29.5 27.5 107 39.3 42.5 92
GROS VENTRE SUMMIT 8775 9.5 10.4 91 14.2 16.2 88
LEWIS LAKE DIVIDE 7860 31.7 29.8 106 35.7 43.1 83
PHILLIPS BENCH 8200 22.2 24.9 89 28.0 34.5 81
SALT RIVER SUMMIT 7600 .9 5.7 16 16.1 22.6 71
SNAKE RIVER STATION 6920 .9 6.6 14 24.9 26.6 94
SPRING CREEK DIVIDE 9000 25.2 25.3 100 26.5 31.3 85
THUMB DIVIDE 7980 11.0 10.4 106 21.4 23.1 93
TOGWOTEE PASS 9580 26.7 27.5 97 28.4 30.4 93
TWO OCEAN PLATEAU 9360 38.6 30.9 125 31.4 33.7 93
WILLOW CREEK 8450 25.0 26.1 96 40.7 39.6 103
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Basin wide percent of average 94 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 31.1 25.6 121 27.3 24.9 110
BLACK BEAR 8170 41.2 37.0 111 40.2 47.5 85
CANYON 8090 12.9 7.7 168 19.1 18.8 102
FISHER CREEK 9100 43.0 36.8 117 41.2 43.8 94
MADISON PLATEAU 7750 21.3 20.2 105 27.2 31.9 85
NORTHEAST ENTRANCE 7350 1.2 3.8 32 16.9 15.9 106
PARKER PEAK 9400 30.1 24.1 125 25.2 20.9 121
SYLVAN LAKE 8420 23.9 20.8 115 29.8 26.4 113
THUMB DIVIDE 7980 11.0 10.4 106 21.4 23.1 93
TWO OCEAN PLATEAU 9360 38.6 30.9 125 31.4 33.7 93
WHISKEY CREEK 6800 10.0 10.6 94 21.4 25.4 84
WHITE MILL 8700 32.1 24.9 129 29.0 32.7 89
WOLVERINE 7650 .9 3.8 24 15.3 16.4 93
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Basin wide percent of average 116 96
WIND RIVER
BURROUGHS CREEK 8750 16.9 10.9 155 22.3 20.6 108
COLD SPRINGS 9630 2.1 3.5 60 13.6 15.1 90
DEER PARK 9700 14.3 17.4 82 22.3 28.5 78
HOBBS PARK 10100 14.0 16.9 83 17.3 18.5 94
LITTLE WARM 9370 5.4 8.3 65 14.8 18.0 82
SOUTH PASS 9040 9.1 14.7 62 18.0 24.0 75
ST. LAWRENCE ALT 8620 1.3 4.0 32 11.8 13.3 89
TOGWOTEE PASS 9580 26.7 27.5 97 28.4 30.4 93
TOWNSEND CREEK 8700 3.7 6.2 60 15.7 16.8 93
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Basin wide percent of average 85 89
BIGHORN BASIN
BALD MTN. 9380 21.6 23.1 94 21.4 22.8 94
BEAR TRAP MEADOW 8200 1.5 1.0 150 12.3 12.2 101
BLACKWATER 9780 31.4 28.8 109 27.5 26.3 105
BONE SPRINGS DIV 9350 19.2 16.5 116 21.2 19.8 107
EVENING STAR 9200 34.4 32.6 106 38.3 31.6 121
GRAVE SPRINGS 8550 6.3 8.4 75 12.5 14.3 87
KIRWIN 9550 15.1 11.3 134 17.0 15.5 110
MARQUETTE 8760 -M 9.2 * -M 15.4 *
MIDDLE POWDER 7760 9.3 11.6 80 11.6 17.1 68
OWL CREEK 8975 1.2 2.5 48 9.0 9.3 97
POWDER RIVER PASS 9480 9.9 8.5 116 16.7 17.3 97
SHELL CREEK 9580 17.1 16.4 104 17.5 18.2 96
SYLVAN LAKE 8420 23.9 20.8 115 29.8 26.4 113
SYLVAN ROAD 7120 7.5 3.5 214 21.5 21.6 100
TIMBER CREEK 7950 4.7 2.6 181 12.4 12.0 103
YOUNTS PEAK 8350 16.6 15.8 105 19.3 20.1 96
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Basin wide percent of average 108 101
SHOSHONE RIVER
BLACKWATER 9780 31.4 28.8 109 27.5 26.3 105
EVENING STAR 9200 34.4 32.6 106 38.3 31.6 121
KIRWIN 9550 15.1 11.3 134 17.0 15.5 110
MARQUETTE 8760 -M 9.2 * -M 15.4 *
SYLVAN LAKE 8420 23.9 20.8 115 29.8 26.4 113
SYLVAN ROAD 7120 7.5 3.5 214 21.5 21.6 100
YOUNTS PEAK 8350 16.6 15.8 105 19.3 20.1 96
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Basin wide percent of average 114 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.5 1.0 150 12.3 12.2 101
BIG GOOSE 7990 -M 9.5 * 18.2 14.3 127
BONE SPRINGS DIV 9350 19.2 16.5 116 21.2 19.8 107
BURGESS JUNCTION 7880 14.2 10.6 134 18.6 16.6 112
CLOUD PEAK RESERVOIR 9860 18.0 15.0 120 19.3 18.9 102
DOME LAKE 8880 12.3 10.8 114 20.2 18.3 110
GRAVE SPRINGS 8550 6.3 8.4 75 12.5 14.3 87
HANSEN SAWMILL 8360 3.2 2.6 123 14.4 12.2 118
MIDDLE POWDER 7760 9.3 11.6 80 11.6 17.1 68
POWDER RIVER PASS 9480 9.9 8.5 116 16.7 17.3 97
SUCKER CREEK 8880 15.6 10.6 147 21.7 19.0 114
TIE CREEK 6870 3.9 1.7 229 19.2 14.9 129
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Basin wide percent of average 117 106
BELLE FOURCHE
BLIND PARK 6890 .1 .7 14* 14.2 15.6 91
COLE CANYON 5910 .1 -M * 12.2 -M *
NORTH RAPID CREEK 6130 .0 1.1 0 12.8 12.4 103
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Basin wide percent of average 6* 96
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.3 14.2 122 31.1 30.4 102
DIVIDE PEAK 8800 19.9 13.7 145 27.3 25.5 107
ELK RIVER 8700 11.7 8.7 134 25.3 24.2 105
JOE WRIGHT 10120 33.3 24.0 139 38.9 31.9 122
NORTH FRENCH CREEK 10100 38.4 33.4 115 38.0 31.5 121
OLD BATTLE 10000 -M 35.7 * -M 41.6 *
SAGE CREEK BASIN 7850 .0 7.9 0 16.1 14.8 109
SOUTH BRUSH CREEK 8400 10.0 7.2 139 23.8 21.5 111
TOWER 10500 54.1 51.6 105 54.7 47.0 116
WEBBER SPRINGS 9200 16.8 19.1 88 31.1 32.5 96
WILLOW CREEK PASS 9540 22.6 11.6 195 21.5 16.9 127
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Basin wide percent of average 117 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 20.2 23.8 85 27.4 28.6 96
CASPER MTN. 7900 11.5 12.5 92 16.7 21.2 79
DEADMAN HILL 10220 21.0 18.2 115 26.2 22.4 117
DEER PARK 9700 14.3 17.4 82 22.3 28.5 78
LAPRELE CREEK 8320 3.9 4.1 95 16.4 17.9 92
RENO HILL 8400 14.1 10.4 136 20.7 21.9 95
ROACH 9700 17.9 14.1 127 25.5 23.9 107
SAND LAKE 10080 34.6 35.7 97 30.4 31.2 97
SOUTH PASS 9040 9.1 14.7 62 18.0 24.0 75
WINDY PEAK 7840 5.0 2.2 227 16.4 14.9 110
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Basin wide percent of average 99 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 1.2 8 20.4 19.5 105
DIVIDE PEAK 8800 19.9 13.7 145 27.3 25.5 107
OLD BATTLE 10000 -M 35.7 * -M 41.6 *
SANDSTONE RS 8150 2.9 4.6 63 23.9 23.0 104
WHISKEY PARK 8950 31.9 27.1 118 35.0 35.3 99
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Basin wide percent of average 118 103
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.6 9.6 90 14.6 16.9 86
BLIND BULL SUM 8650 23.7 25.3 94 20.3 26.3 77
EAST RIM DIVIDE 7930 6.2 9.8 63 12.1 14.8 82
ELKHART PARK G.S. 9400 10.1 9.9 102 14.9 17.2 87
GROS VENTRE SUMMIT 8775 9.5 10.4 91 14.2 16.2 88
KENDALL R.S. 7740 .0 4.6 0 14.9 17.4 86
LOOMIS PARK 8240 7.0 10.4 67 19.1 20.9 91
NEW FORK LAKE 8340 3.1 4.5 69 -M 14.4 *
SNIDER BASIN 8250 3.6 8.4 43 15.1 19.2 79
SPRING CREEK DIVIDE 9000 25.2 25.3 100 26.5 31.3 85
TRIPLE PEAK 8500 16.1 18.0 89 30.6 29.9 102
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Basin wide percent of average 83 87
LOWER GREEN RIVER
HAMS FORK 7840 .3 1.8 17 14.1 15.6 90
HEWINTA 9500 4.4 5.2 85 15.8 18.8 84
HICKERSON PARK 9150 1.6 2.6 62 12.7 11.1 114
HOLE-IN-ROCK 9150 2.1 2.1 100 13.4 10.7 125
INDIAN CREEK 9425 23.0 24.4 94 23.6 30.7 77
KELLEY R.S. 8180 7.6 9.8 78 16.3 24.6 66
STEEL CREEK PARK 10100 18.5 18.2 102 18.5 21.4 86
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Basin wide percent of average 90 86
UPPER BEAR RIVER
BUG LAKE 7950 10.8 11.9 91 20.2 23.4 86
HAYDEN FORK 9400 4.0 8.1 49 22.2 26.4 84
KELLEY R.S. 8180 7.6 9.8 78 16.3 24.6 66
LILY LAKE 9050 3.2 7.0 46 19.1 22.3 86
MONTE CRISTO 8960 11.2 23.5 48 26.4 31.7 83
SALT RIVER SUMMIT 7600 .9 5.7 16 16.1 22.6 71
TRIAL LAKE 9960 14.3 23.7 60 22.2 30.9 72
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Basin wide percent of average 58 78
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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.