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: NOVEMBER 20 , 2002
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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 3.3 2.7 122 3.8 4.6 83
COTTONWOOD CREEK 7600 4.1 3.1 132 5.3 6.2 85
GRANITE CREEK 6770 3.0 2.2 136 4.0 4.1 98
GRASSY LAKE 7265 4.3 5.1 84 5.5 7.4 74
GROS VENTRE SUMMIT 8775 2.8 2.9 97 2.7 3.4 79
LEWIS LAKE DIVIDE 7860 3.7 5.0 74 5.2 7.5 69
PHILLIPS BENCH 8200 4.4 4.3 102 5.3 5.6 95
SALT RIVER SUMMIT 7600 1.8 1.6 112 3.1 3.9 79
SNAKE RIVER STATION 6920 2.7 2.6 104 4.0 4.9 82
SPRING CREEK DIVIDE 9000 4.1 4.6 89 4.4 5.6 79
THUMB DIVIDE 7980 2.6 2.7 96 3.8 4.2 90
TOGWOTEE PASS 9580 4.9 5.3 92 4.8 5.7 84
TWO OCEAN PLATEAU 9360 7.3 6.3 116 4.7 6.4 73
WILLOW CREEK 8450 3.9 5.4 72 6.2 7.3 85
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Basin wide percent of average 98 82
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 4.6 5.4 85 3.4 4.5 76
BLACK BEAR 8170 4.8 6.8 71 5.0 8.0 62
CANYON 8090 1.7 2.2 77 2.6 3.7 70
FISHER CREEK 9100 4.0 6.5 62 4.3 7.5 57
MADISON PLATEAU 7750 2.5 4.2 60 3.4 5.5 62
NORTHEAST ENTRANCE 7350 .9 1.5 60 2.0 3.1 65
PARKER PEAK 9400 4.8 5.1 94 4.5 4.4 102
SYLVAN LAKE 8420 3.7 4.7 79 5.4 5.5 98
THUMB DIVIDE 7980 2.6 2.7 96 3.8 4.2 90
TWO OCEAN PLATEAU 9360 7.3 6.3 116 4.7 6.4 73
WHISKEY CREEK 6800 1.8 2.5 72 2.7 4.6 59
WHITE MILL 8700 3.6 4.7 77 3.3 5.9 56
WOLVERINE 7650 .8 2.0 40 3.0 3.5 86
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Basin wide percent of average 79 72
WIND RIVER
BURROUGHS CREEK 8750 3.8 2.7 141 4.6 3.7 124
COLD SPRINGS 9630 1.9 2.4 79 3.1 3.4 91
DEER PARK 9700 3.1 4.0 78 3.6 5.5 65
HOBBS PARK 10100 3.8 4.2 90 3.8 3.7 103
LITTLE WARM 9370 2.2 2.6 85 2.8 3.6 78
SOUTH PASS 9040 2.8 3.7 76 3.5 4.6 76
ST. LAWRENCE ALT 8620 1.6 2.1 76 3.2 2.9 110
TOGWOTEE PASS 9580 4.9 5.3 92 4.8 5.7 84
TOWNSEND CREEK 8700 1.8 2.3 78 3.4 3.7 92
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Basin wide percent of average 88 89
BIGHORN BASIN
BALD MTN. 9380 4.1 4.9 84 3.9 4.3 91
BEAR TRAP MEADOW 8200 .9 1.3 69 1.7 2.8 61
BLACKWATER 9780 5.0 5.9 85 4.4 5.6 79
BONE SPRINGS DIV 9350 3.5 4.5 78 3.2 4.1 78
EVENING STAR 9200 3.5 6.2 56 4.6 6.3 73
GRAVE SPRINGS 8550 .9 2.2 41 1.8 3.1 58
KIRWIN 9550 2.6 3.4 76 3.1 3.3 94
MARQUETTE 8760 2.5 3.1 81 1.8 3.5 51
MIDDLE POWDER 7760 1.5 2.8 54 2.0 4.1 49
OWL CREEK 8975 2.1 1.6 131 2.0 1.8 111
POWDER RIVER PASS 9480 2.1 2.6 81 2.9 3.3 88
SHELL CREEK 9580 3.5 4.3 81 3.3 3.6 92
SYLVAN LAKE 8420 3.7 4.7 79 5.4 5.5 98
SYLVAN ROAD 7120 2.3 2.3 100 4.0 5.0 80
TIMBER CREEK 7950 1.6 2.0 80 2.5 2.5 100
YOUNTS PEAK 8350 3.2 3.4 94 3.2 4.0 80
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Basin wide percent of average 78 79
SHOSHONE RIVER
BLACKWATER 9780 5.0 5.9 85 4.4 5.6 79
EVENING STAR 9200 3.5 6.2 56 4.6 6.3 73
KIRWIN 9550 2.6 3.4 76 3.1 3.3 94
MARQUETTE 8760 2.5 3.1 81 1.8 3.5 51
SYLVAN LAKE 8420 3.7 4.7 79 5.4 5.5 98
SYLVAN ROAD 7120 2.3 2.3 100 4.0 5.0 80
YOUNTS PEAK 8350 3.2 3.4 94 3.2 4.0 80
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Basin wide percent of average 79 80
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .9 1.3 69 1.7 2.8 61
BIG GOOSE 7990 1.9 1.8 106 2.8 2.7 104
BONE SPRINGS DIV 9350 3.5 4.5 78 3.2 4.1 78
BURGESS JUNCTION 7880 2.1 3.0 70 2.9 3.5 83
CLOUD PEAK RESERVOIR 9860 2.6 3.0 87 2.9 4.1 71
DOME LAKE 8880 2.9 3.5 83 3.2 4.1 78
GRAVE SPRINGS 8550 .9 2.2 41 1.8 3.1 58
HANSEN SAWMILL 8360 1.7 1.5 113 2.4 2.7 89
MIDDLE POWDER 7760 1.5 2.8 54 2.0 4.1 49
POWDER RIVER PASS 9480 2.1 2.6 81 2.9 3.3 88
SUCKER CREEK 8880 2.2 2.6 85 3.4 3.8 89
TIE CREEK 6870 .8 1.2 67 2.7 3.3 82
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Basin wide percent of average 77 77
BELLE FOURCHE
BLIND PARK 6890 1.4 1.7 82 2.5 3.8 66
COLE CANYON 5910 .4 -M * 1.4 -M *
NORTH RAPID CREEK 6130 1.0 1.2 83 2.1 3.4 62
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Basin wide percent of average 83 64
UPPER N. PLATTE RIVER
COLUMBINE 9400 3.9 3.4 115 6.1 5.0 122
DIVIDE PEAK 8800 2.9 3.8 76 5.2 5.0 104
ELK RIVER 8700 2.5 2.1 119 4.8 4.1 117
JOE WRIGHT 10120 4.7 5.1 92 6.6 6.2 106
NORTH FRENCH CREEK 10100 4.7 6.1 77 6.4 6.0 107
OLD BATTLE 10000 5.2 6.7 78 8.1 7.2 112
SAGE CREEK BASIN 7850 2.0 2.2 91 4.0 -M *
SOUTH BRUSH CREEK 8400 2.3 2.1 110 4.3 4.3 100
TOWER 10500 10.0 9.2 109 11.0 8.2 134
WEBBER SPRINGS 9200 3.7 4.8 77 5.4 6.1 89
WILLOW CREEK PASS 9540 5.0 2.8 179 4.6 3.6 128
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Basin wide percent of average 97 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 3.1 4.5 69 5.8 4.9 118
CASPER MTN. 7900 1.9 3.6 53 2.7 4.2 64
DEADMAN HILL 10220 2.4 4.0 60 3.9 4.3 91
DEER PARK 9700 3.1 4.0 78 3.6 5.5 65
LAPRELE CREEK 8320 -M 2.4 * -M 3.5 *
RENO HILL 8400 2.2 3.3 67 3.2 4.2 76
ROACH 9700 3.7 3.1 119 4.3 4.2 102
SAND LAKE 10080 4.0 7.0 57 5.3 5.7 93
SOUTH PASS 9040 2.8 3.7 76 3.5 4.6 76
WINDY PEAK 7840 1.6 1.7 94 2.5 3.0 83
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Basin wide percent of average 71 86
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.7 1.4 121 4.3 3.5 123
DIVIDE PEAK 8800 2.9 3.8 76 5.2 5.0 104
OLD BATTLE 10000 5.2 6.7 78 8.1 7.2 112
SANDSTONE RS 8150 1.5 1.6 94 5.0 4.4 114
WHISKEY PARK 8950 3.8 4.5 84 6.0 6.0 100
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Basin wide percent of average 84 110
UPPER GREEN RIVER
BIG SANDY OPENING 9100 2.3 2.9 79 2.2 3.4 65
BLIND BULL SUM 8650 3.2 4.9 65 3.4 4.9 69
EAST RIM DIVIDE 7930 1.5 2.2 68 2.4 2.7 89
ELKHART PARK G.S. 9400 2.9 2.5 116 3.0 3.5 86
GROS VENTRE SUMMIT 8775 2.8 2.9 97 2.7 3.4 79
KENDALL R.S. 7740 2.4 2.2 109 3.0 3.2 94
LOOMIS PARK 8240 2.9 3.0 97 3.5 3.8 92
NEW FORK LAKE 8340 2.0 1.9 105 2.3 3.0 77
SNIDER BASIN 8250 1.9 2.4 79 2.7 3.5 77
SPRING CREEK DIVIDE 9000 4.1 4.6 89 4.4 5.6 79
TRIPLE PEAK 8500 3.5 4.2 83 5.2 5.0 104
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Basin wide percent of average 88 83
LOWER GREEN RIVER
HAMS FORK 7840 2.7 1.6 169 3.6 2.8 129
HEWINTA 9500 1.8 1.6 112 3.5 4.0 88
HICKERSON PARK 9150 .3 1.1 27 2.7 2.7 100
HOLE-IN-ROCK 9150 1.6 1.2 133 2.9 2.5 116
INDIAN CREEK 9425 4.4 4.6 96 4.3 5.4 80
KELLEY R.S. 8180 2.5 2.9 86 3.3 4.4 75
STEEL CREEK PARK 10100 2.0 3.1 65 3.2 4.2 76
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Basin wide percent of average 95 90
UPPER BEAR RIVER
BUG LAKE 7950 3.8 2.9 131 4.5 4.5 100
HAYDEN FORK 9400 3.0 2.2 136 5.2 4.8 108
KELLEY R.S. 8180 2.5 2.9 86 3.3 4.4 75
LILY LAKE 9050 2.3 2.1 110 4.2 4.5 93
MONTE CRISTO 8960 4.6 3.7 124 6.0 5.7 105
SALT RIVER SUMMIT 7600 1.8 1.6 112 3.1 3.9 79
TRIAL LAKE 9960 3.4 4.2 81 5.6 5.3 106
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Basin wide percent of average 109 96
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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.