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: FEBRUARY 18 , 2009
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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 11.5 14.7 78 14.2 17.0 84
COTTONWOOD CREEK 7670 19.3 16.5 117 22.9 21.1 109
GRAND TARGHEE 9260 29.5 -M * 25.5 -M *
GRANITE CREEK 6770 12.1 14.6 83 16.6 15.9 104
GRASSY LAKE 7265 23.1 26.9 86 26.2 28.5 92
GROS VENTRE SUMMIT 8750 8.8 10.6 83 10.6 9.8 108
GUNSIGHT PASS 9820 10.5 -M * 11.5 -M *
LEWIS LAKE DIVIDE 7850 18.9 27.0 70 23.0 28.7 80
PHILLIPS BENCH 8200 19.0 21.7 88 21.2 22.5 94
SALT RIVER SUMMIT 7760 9.9 11.1 89 11.4 14.5 79
SNAKE RIVER STATION 6920 12.2 15.0 81 16.3 17.9 91
SPRING CREEK DIVIDE 9000 19.1 20.2 95 19.6 20.7 95
THUMB DIVIDE 7980 11.5 13.8 83 13.3 14.6 91
TOGWOTEE PASS 9580 20.3 19.2 106 22.3 19.0 117
TWO OCEAN PLATEAU 9240 25.2 21.6 117 19.8 21.3 93
WILLOW CREEK 8380 24.3 23.3 104 28.8 24.8 116
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Basin wide percent of average 92 96
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.2 18.6 87 14.8 15.8 94
BLACK BEAR 8170 24.1 30.1 80 25.1 30.2 83
CANYON 7870 9.1 10.4 87 9.9 12.1 82
FISHER CREEK 9100 26.0 27.3 95 24.4 28.0 87
MADISON PLATEAU 7750 13.6 19.1 71 15.6 20.1 78
NORTHEAST ENTRANCE 7350 7.7 9.0 86 10.0 10.0 100
PARKER PEAK 9400 18.4 16.8 110 13.5 12.6 107
SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96
THUMB DIVIDE 7980 11.5 13.8 83 13.3 14.6 91
TWO OCEAN PLATEAU 9240 25.2 21.6 117 19.8 21.3 93
WHISKEY CREEK 6800 10.0 13.1 76 13.0 15.8 82
WHITE MILL 8700 17.2 18.6 92 17.1 20.8 82
WOLVERINE 7650 8.9 9.9 90 8.8 10.4 85
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Basin wide percent of average 89 88
WIND RIVER
BURROUGHS CREEK 8750 12.3 11.6 106 13.0 12.7 102
COLD SPRINGS 9630 5.0 6.6 76 6.8 7.8 87
DEER PARK 9700 6.8 13.9 49 10.5 16.5 64
HOBBS PARK 10100 7.2 11.0 65 7.5 9.1 82
LITTLE WARM 9370 7.9 8.8 90 10.0 10.1 99
SOUTH PASS 9040 7.2 13.0 55 9.4 13.9 68
ST. LAWRENCE ALT 8620 1.9 5.4 35 4.9 6.5 75
TOGWOTEE PASS 9580 20.3 19.2 106 22.3 19.0 117
TOWNSEND CREEK 8700 4.3 6.5 66 6.6 8.2 80
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Basin wide percent of average 76 88
BIGHORN BASIN
BALD MTN. 9380 14.7 14.8 99 12.1 13.1 92
BEAR TRAP MEADOW 8200 6.6 4.0 165 7.0 6.0 117
BLACKWATER 9780 16.7 18.8 89 15.4 15.9 97
BONE SPRINGS DIV 9350 14.9 12.0 124 11.6 10.8 107
EVENING STAR 9200 21.5 23.0 93 22.7 20.1 113
GRAVE SPRINGS 8550 5.9 6.5 91 7.0 7.1 99
KIRWIN 9550 8.9 8.5 105 10.1 8.5 119
MARQUETTE 8760 3.0 6.4 47 6.0 6.9 87
MIDDLE POWDER 7760 7.4 8.2 90 7.9 9.0 88
OWL CREEK 8975 4.0 3.8 105 3.9 4.1 95
POWDER RIVER PASS 9480 10.1 8.0 126 11.5 9.3 124
SHELL CREEK 9580 13.4 10.9 123 13.0 10.2 127
SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96
SYLVAN ROAD 7120 10.6 10.5 101 13.8 14.7 94
TIMBER CREEK 7950 2.8 4.0 70 6.0 5.0 120
YOUNTS PEAK 8350 14.1 13.6 104 12.9 12.6 102
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Basin wide percent of average 99 104
SHOSHONE RIVER
BLACKWATER 9780 16.7 18.8 89 15.4 15.9 97
EVENING STAR 9200 21.5 23.0 93 22.7 20.1 113
KIRWIN 9550 8.9 8.5 105 10.1 8.5 119
MARQUETTE 8760 3.0 6.4 47 6.0 6.9 87
SYLVAN LAKE 8420 13.7 17.3 79 16.0 16.6 96
SYLVAN ROAD 7120 10.6 10.5 101 13.8 14.7 94
YOUNTS PEAK 8350 14.1 13.6 104 12.9 12.6 102
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Basin wide percent of average 90 102
POWDER-TONGUE
BEAR TRAP MEADOW 8200 6.6 4.0 165 7.0 6.0 117
BIG GOOSE 7990 6.6 7.0 94 8.7 6.3 138
BONE SPRINGS DIV 9350 14.9 12.0 124 11.6 10.8 107
BURGESS JUNCTION 7880 8.9 8.3 107 9.8 8.8 111
CLOUD PEAK RESERVOIR 9860 13.1 9.1 144 12.6 9.1 138
DOME LAKE 8880 9.3 8.9 104 11.3 9.6 118
GRAVE SPRINGS 8550 5.9 6.5 91 7.0 7.1 99
HANSEN SAWMILL 8360 4.8 4.7 102 7.5 5.8 129
MIDDLE POWDER 7760 7.4 8.2 90 7.9 9.0 88
POWDER RIVER PASS 9480 10.1 8.0 126 11.5 9.3 124
SUCKER CREEK 8880 10.7 8.3 129 12.7 9.8 130
TIE CREEK 6870 3.7 4.6 80 10.2 7.4 138
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Basin wide percent of average 114 119
BELLE FOURCHE
BLIND PARK 6890 8.1 6.2 131 12.5 8.6 145
COLE CANYON 5910 4.8 5.2 92 9.4 5.2 181
NORTH RAPID CREEK 6130 7.8 6.1 128 10.8 7.0 154
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Basin wide percent of average 118 157
UPPER N. PLATTE RIVER
COLUMBINE 9160 20.9 19.8 106 19.5 19.1 102
DIVIDE PEAK 8880 17.7 14.4 123 19.3 15.5 125
ELK RIVER 8700 18.8 14.6 129 17.4 14.6 119
JOE WRIGHT 10120 17.2 15.9 108 20.8 18.4 113
NORTH FRENCH CREEK 10130 24.9 20.7 120 23.6 18.5 128
OLD BATTLE 10000 25.2 23.6 107 30.1 25.8 117
SAGE CREEK BASIN 7850 9.9 8.4 118 11.3 9.0 126
SOUTH BRUSH CREEK 8440 10.4 8.8 118 12.0 12.3 98
TOWER 10500 33.1 34.6 96 31.7 29.2 109
WEBBER SPRINGS 9250 19.2 19.0 101 22.3 20.3 110
WILLOW CREEK PASS 9540 10.2 8.7 117 9.2 9.5 97
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Basin wide percent of average 110 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.8 17.5 96 15.5 16.0 97
CASPER MTN. 7900 7.9 10.3 77 10.2 10.1 101
DEADMAN HILL 10220 12.0 12.0 100 12.3 12.0 103
DEER PARK 9700 6.8 13.9 49 10.5 16.5 64
LAPRELE CREEK 8375 7.3 8.2 89 7.8 9.1 86
RENO HILL 8400 8.5 9.5 89 9.7 10.5 92
ROACH 9700 12.3 12.8 96 14.1 13.3 106
SAND LAKE 10050 21.6 22.8 95 19.7 17.7 111
SOUTH PASS 9040 7.2 13.0 55 9.4 13.9 68
WINDY PEAK 7900 6.3 5.4 117 6.7 7.8 86
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Basin wide percent of average 85 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 13.3 8.8 151 13.9 11.2 124
DIVIDE PEAK 8880 17.7 14.4 123 19.3 15.5 125
OLD BATTLE 10000 25.2 23.6 107 30.1 25.8 117
SANDSTONE RS 8150 13.8 11.3 122 16.2 14.3 113
WHISKEY PARK 8950 25.0 21.6 116 25.9 21.6 120
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Basin wide percent of average 119 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.6 11.0 78 8.6 10.3 83
BLIND BULL SUM 8650 18.2 21.0 87 15.3 17.5 87
EAST RIM DIVIDE 7930 7.0 10.0 70 9.6 9.3 103
ELKHART PARK G.S. 9400 9.8 10.1 97 10.9 10.0 109
GROS VENTRE SUMMIT 8750 8.8 10.6 83 10.6 9.8 108
GUNSIGHT PASS 9820 10.5 -M * 11.5 -M *
KENDALL R.S. 7740 8.4 11.3 74 10.6 11.3 94
LOOMIS PARK 8240 12.3 13.1 94 14.7 13.5 109
NEW FORK LAKE 8340 9.1 8.8 103 8.7 8.9 98
SNIDER BASIN 8060 10.2 11.4 89 10.9 12.6 87
SPRING CREEK DIVIDE 9000 19.1 20.2 95 19.6 20.7 95
TRIPLE PEAK 8500 17.7 19.1 93 19.5 18.7 104
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Basin wide percent of average 88 97
LOWER GREEN RIVER
HAMS FORK 7840 7.8 9.9 79 8.1 9.5 85
HEWINTA 9519 6.3 8.1 78 9.0 10.6 85
HICKERSON PARK 9145 2.5 5.3 47 5.1 5.7 89
HOLE-IN-ROCK 9150 2.9 5.1 57 5.1 5.3 96
INDIAN CREEK 9425 16.2 20.2 80 15.3 19.3 79
KELLEY R.S. 8180 10.6 12.6 84 12.3 15.8 78
STEEL CREEK PARK 10200 8.0 11.3 71 11.2 11.7 96
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Basin wide percent of average 75 85
UPPER BEAR RIVER
BUG LAKE 7950 13.1 15.5 85 12.7 14.7 86
HAYDEN FORK 9212 12.7 11.7 109 15.5 15.6 99
KELLEY R.S. 8180 10.6 12.6 84 12.3 15.8 78
LILY LAKE 9156 10.1 9.8 103 11.8 13.0 91
MONTE CRISTO 8960 19.0 22.1 86 19.3 19.2 101
SALT RIVER SUMMIT 7760 9.9 11.1 89 11.4 14.5 79
TRIAL LAKE 9992 17.7 18.6 95 17.2 18.5 93
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Basin wide percent of average 92 90
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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 1961-90.
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.