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 MONDAY: FEBRUARY 23 , 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 11.6 15.3 76 14.4 17.7 81
COTTONWOOD CREEK 7670 19.7 17.2 115 23.3 21.9 106
GRAND TARGHEE 9260 30.2 -M * 25.9 -M *
GRANITE CREEK 6770 12.3 15.2 81 16.8 16.5 102
GRASSY LAKE 7265 23.5 28.0 84 26.5 29.6 90
GROS VENTRE SUMMIT 8750 8.9 10.9 82 10.7 10.2 105
GUNSIGHT PASS 9820 10.7 -M * 11.6 -M *
LEWIS LAKE DIVIDE 7850 19.4 28.1 69 23.2 29.9 78
PHILLIPS BENCH 8200 19.3 22.6 85 21.6 23.4 92
SALT RIVER SUMMIT 7760 10.2 11.5 89 11.7 15.0 78
SNAKE RIVER STATION 6920 12.6 15.6 81 16.5 18.6 89
SPRING CREEK DIVIDE 9000 19.7 21.0 94 20.1 21.5 93
THUMB DIVIDE 7980 11.6 14.4 81 13.4 15.2 88
TOGWOTEE PASS 9580 21.1 19.8 107 23.0 19.7 117
TWO OCEAN PLATEAU 9240 25.6 22.3 115 20.0 22.2 90
WILLOW CREEK 8380 24.9 24.1 103 29.5 25.7 115
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Basin wide percent of average 90 94
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 16.6 19.1 87 15.3 16.4 93
BLACK BEAR 8170 24.5 31.5 78 25.3 31.5 80
CANYON 7870 9.4 10.9 86 10.3 12.5 82
FISHER CREEK 9100 26.5 28.4 93 25.3 29.1 87
MADISON PLATEAU 7750 13.8 19.9 69 15.7 21.0 75
NORTHEAST ENTRANCE 7350 7.9 9.4 84 10.3 10.4 99
PARKER PEAK 9400 18.8 17.5 107 -M 13.1 *
SYLVAN LAKE 8420 14.1 18.1 78 16.3 17.2 95
THUMB DIVIDE 7980 11.6 14.4 81 13.4 15.2 88
TWO OCEAN PLATEAU 9240 25.6 22.3 115 20.0 22.2 90
WHISKEY CREEK 6800 10.1 13.8 73 13.2 16.5 80
WHITE MILL 8700 17.7 19.5 91 17.5 21.6 81
WOLVERINE 7650 9.2 10.3 89 9.1 10.7 85
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Basin wide percent of average 88 85
WIND RIVER
BURROUGHS CREEK 8750 12.5 12.2 102 13.2 13.1 101
COLD SPRINGS 9630 5.1 6.9 74 6.9 8.1 85
DEER PARK 9700 6.8 13.9 49 10.7 17.1 63
HOBBS PARK 10100 7.2 11.5 63 7.5 9.5 79
LITTLE WARM 9370 8.1 9.2 88 10.2 10.4 98
SOUTH PASS 9040 7.3 13.5 54 9.3 14.4 65
ST. LAWRENCE ALT 8620 2.0 5.6 36 4.9 6.7 73
TOGWOTEE PASS 9580 21.1 19.8 107 23.0 19.7 117
TOWNSEND CREEK 8700 4.5 6.7 67 6.7 8.5 79
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Basin wide percent of average 75 86
BIGHORN BASIN
BALD MTN. 9380 15.3 15.4 99 12.6 13.5 93
BEAR TRAP MEADOW 8200 7.1 4.1 173 7.4 6.2 119
BLACKWATER 9780 16.9 19.7 86 15.7 16.5 95
BONE SPRINGS DIV 9350 15.3 12.5 122 12.0 11.1 108
EVENING STAR 9200 22.1 24.0 92 23.5 20.8 113
GRAVE SPRINGS 8550 6.7 6.8 99 7.6 7.4 103
KIRWIN 9550 9.0 8.8 102 10.2 8.8 116
MARQUETTE 8760 3.0 6.6 45 6.1 7.2 85
MIDDLE POWDER 7760 8.5 8.6 99 7.8 9.2 85
OWL CREEK 8975 4.1 3.9 105 4.0 4.2 95
POWDER RIVER PASS 9480 10.4 8.3 125 11.9 9.6 124
SHELL CREEK 9580 13.9 11.3 123 13.3 10.5 127
SYLVAN LAKE 8420 14.1 18.1 78 16.3 17.2 95
SYLVAN ROAD 7120 10.8 10.9 99 14.0 15.1 93
TIMBER CREEK 7950 3.0 4.0 75 5.9 5.2 113
YOUNTS PEAK 8350 14.3 14.2 101 13.0 13.1 99
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Basin wide percent of average 98 103
SHOSHONE RIVER
BLACKWATER 9780 16.9 19.7 86 15.7 16.5 95
EVENING STAR 9200 22.1 24.0 92 23.5 20.8 113
KIRWIN 9550 9.0 8.8 102 10.2 8.8 116
MARQUETTE 8760 3.0 6.6 45 6.1 7.2 85
SYLVAN LAKE 8420 14.1 18.1 78 16.3 17.2 95
SYLVAN ROAD 7120 10.8 10.9 99 14.0 15.1 93
YOUNTS PEAK 8350 14.3 14.2 101 13.0 13.1 99
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Basin wide percent of average 88 100
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.1 4.1 173 7.4 6.2 119
BIG GOOSE 7990 6.7 7.3 92 8.9 6.5 137
BONE SPRINGS DIV 9350 15.3 12.5 122 12.0 11.1 108
BURGESS JUNCTION 7880 9.4 8.6 109 10.0 9.1 110
CLOUD PEAK RESERVOIR 9860 13.5 9.5 142 12.8 9.4 136
DOME LAKE 8880 9.6 9.2 104 11.5 9.8 117
GRAVE SPRINGS 8550 6.7 6.8 99 7.6 7.4 103
HANSEN SAWMILL 8360 5.0 4.9 102 7.8 6.0 130
MIDDLE POWDER 7760 8.5 8.6 99 7.8 9.2 85
POWDER RIVER PASS 9480 10.4 8.3 125 11.9 9.6 124
SUCKER CREEK 8880 11.2 8.7 129 13.2 10.1 131
TIE CREEK 6870 3.9 4.6 85 10.5 7.6 138
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Basin wide percent of average 115 119
BELLE FOURCHE
BLIND PARK 6890 8.2 6.4 128 12.7 8.9 143
COLE CANYON 5910 4.9 5.4 91 9.4 5.3 177
NORTH RAPID CREEK 6130 7.8 6.4 122 10.8 7.2 150
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Basin wide percent of average 115 154
UPPER N. PLATTE RIVER
COLUMBINE 9160 22.3 20.7 108 20.9 19.8 106
DIVIDE PEAK 8880 18.4 14.9 123 19.9 16.2 123
ELK RIVER 8700 19.7 15.2 130 18.2 15.3 119
JOE WRIGHT 10120 17.3 16.4 105 21.2 19.1 111
NORTH FRENCH CREEK 10130 27.1 21.5 126 25.6 19.2 133
OLD BATTLE 10000 26.5 24.7 107 31.3 26.9 116
SAGE CREEK BASIN 7850 10.2 8.6 119 11.6 9.4 123
SOUTH BRUSH CREEK 8440 10.7 9.3 115 12.4 12.7 98
TOWER 10500 34.8 35.8 97 33.2 30.4 109
WEBBER SPRINGS 9250 20.0 19.9 101 23.1 21.0 110
WILLOW CREEK PASS 9540 10.3 9.1 113 9.4 9.8 96
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Basin wide percent of average 111 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 17.6 18.1 97 16.5 16.6 99
CASPER MTN. 7900 8.3 10.7 78 10.4 10.5 99
DEADMAN HILL 10220 12.6 12.4 102 12.9 12.5 103
DEER PARK 9700 6.8 13.9 49 10.7 17.1 63
LAPRELE CREEK 8375 7.7 8.5 91 8.3 9.5 87
RENO HILL 8400 9.0 9.8 92 10.3 10.9 94
ROACH 9700 12.6 13.3 95 14.5 14.0 104
SAND LAKE 10050 23.0 23.7 97 21.2 18.4 115
SOUTH PASS 9040 7.3 13.5 54 9.3 14.4 65
WINDY PEAK 7900 6.5 5.7 114 7.2 8.1 89
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Basin wide percent of average 86 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 14.1 9.1 155 14.5 11.7 124
DIVIDE PEAK 8880 18.4 14.9 123 19.9 16.2 123
OLD BATTLE 10000 26.5 24.7 107 31.3 26.9 116
SANDSTONE RS 8150 14.1 11.8 119 16.5 14.9 111
WHISKEY PARK 8950 25.9 22.4 116 27.1 22.4 121
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Basin wide percent of average 119 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.6 11.5 75 8.7 10.8 81
BLIND BULL SUM 8650 18.6 21.8 85 15.4 18.2 85
EAST RIM DIVIDE 7930 7.1 10.4 68 9.7 9.7 100
ELKHART PARK G.S. 9400 10.0 10.5 95 11.1 10.4 107
GROS VENTRE SUMMIT 8750 8.9 10.9 82 10.7 10.2 105
GUNSIGHT PASS 9820 10.7 -M * 11.6 -M *
KENDALL R.S. 7740 8.5 11.7 73 10.7 11.9 90
LOOMIS PARK 8240 12.5 13.7 91 14.9 14.1 106
NEW FORK LAKE 8340 9.3 9.2 101 8.8 9.2 96
SNIDER BASIN 8060 10.4 11.8 88 11.1 13.1 85
SPRING CREEK DIVIDE 9000 19.7 21.0 94 20.1 21.5 93
TRIPLE PEAK 8500 18.0 19.8 91 19.9 19.6 102
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Basin wide percent of average 86 95
LOWER GREEN RIVER
HAMS FORK 7840 8.0 10.3 78 8.5 9.9 86
HEWINTA 9519 6.3 8.5 74 9.1 11.0 83
HICKERSON PARK 9145 2.6 5.5 47 5.2 5.9 88
HOLE-IN-ROCK 9150 3.0 5.3 57 5.2 5.5 95
INDIAN CREEK 9425 16.6 21.0 79 15.7 20.1 78
KELLEY R.S. 8180 10.8 13.2 82 12.6 16.4 77
STEEL CREEK PARK 10200 8.2 11.9 69 11.2 12.2 92
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Basin wide percent of average 73 83
UPPER BEAR RIVER
BUG LAKE 7950 13.5 16.2 83 13.0 15.3 85
HAYDEN FORK 9212 12.7 12.3 103 15.6 16.2 96
KELLEY R.S. 8180 10.8 13.2 82 12.6 16.4 77
LILY LAKE 9156 10.2 10.2 100 11.8 13.6 87
MONTE CRISTO 8960 19.2 23.2 83 19.5 20.0 98
SALT RIVER SUMMIT 7760 10.2 11.5 89 11.7 15.0 78
TRIAL LAKE 9992 17.8 19.4 92 17.4 19.3 90
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Basin wide percent of average 89 88
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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.