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 29 , 2012
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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 18.0 15.9 113 21.2 18.5 115
COTTONWOOD CREEK 7670 17.0 18.3 93 22.0 22.9 96
EAST RIM DIVIDE 7930 10.0 11.0 91 10.4 10.2 102
GRAND TARGHEE 9260 29.7 -M * 24.3 -M *
GRANITE CREEK 6770 14.5 16.0 91 14.9 17.3 86
GRASSY LAKE 7265 27.2 29.3 93 30.8 30.8 100
GROS VENTRE SUMMIT 8750 8.3 11.4 73 8.7 10.7 81
GUNSIGHT PASS 9820 10.5 -M * 11.2 -M *
LEWIS LAKE DIVIDE 7850 25.5 29.4 87 29.1 31.3 93
PHILLIPS BENCH 8200 20.0 23.7 84 21.6 24.5 88
SALT RIVER SUMMIT 7760 9.7 12.1 80 10.4 15.7 66
SNAKE RIVER STATION 6920 16.4 16.4 100 21.4 19.4 110
SPRING CREEK DIVIDE 9000 20.2 22.0 92 20.2 22.3 91
THUMB DIVIDE 7980 12.7 15.2 84 13.8 15.9 87
TOGWOTEE PASS 9580 18.5 20.6 90 20.2 20.5 99
TWO OCEAN PLATEAU 9240 27.9 23.2 120 -M 23.2 *
WILLOW CREEK 8380 22.3 25.2 88 27.4 26.8 102
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Basin wide percent of average 93 95
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 20.6 19.7 105 20.0 17.0 118
BLACK BEAR 8170 28.3 32.9 86 28.9 33.1 87
CANYON 7870 10.4 11.3 92 11.9 12.9 92
FISHER CREEK 9100 28.0 29.6 95 27.3 30.4 90
MADISON PLATEAU 7750 17.3 20.8 83 21.1 21.9 96
NORTHEAST ENTRANCE 7350 9.2 9.7 95 10.7 10.7 100
PARKER PEAK 9400 19.0 18.1 105 18.7 13.6 138
SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115
THUMB DIVIDE 7980 12.7 15.2 84 13.8 15.9 87
TWO OCEAN PLATEAU 9240 27.9 23.2 120 -M 23.2 *
WHISKEY CREEK 6800 12.2 14.4 85 15.3 17.3 88
WHITE MILL 8700 18.4 20.3 91 19.2 22.6 85
WOLVERINE 7650 11.9 10.6 112 11.2 11.1 101
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Basin wide percent of average 95 97
WIND RIVER
BURROUGHS CREEK 8750 12.8 12.6 102 13.0 13.6 96
CASTLE CREEK 8400 7.0 -M * 7.8 -M *
COLD SPRINGS 9630 7.4 7.2 103 8.3 8.4 99
DEER PARK 9700 10.2 14.4 71 15.3 17.7 86
HOBBS PARK 10100 12.8 11.9 108 11.8 9.8 120
LITTLE WARM 9370 7.2 9.5 76 9.3 10.8 86
SOUTH PASS 9040 12.5 14.0 89 12.1 14.9 81
ST. LAWRENCE ALT 8620 4.7 5.9 80 6.9 7.0 99
TOGWOTEE PASS 9580 18.5 20.6 90 20.2 20.5 99
TOWNSEND CREEK 8700 8.0 6.9 116 10.2 8.8 116
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Basin wide percent of average 91 96
BIGHORN BASIN
BALD MTN. 9380 18.4 16.0 115 13.3 14.0 95
BEAR TRAP MEADOW 8200 7.7 4.3 179 7.7 6.4 120
BLACKWATER 9780 21.1 20.4 103 20.7 17.1 121
BONE SPRINGS DIV 9350 17.9 13.2 136 13.7 11.5 119
EVENING STAR 9200 24.2 25.0 97 26.2 21.7 121
GRAVE SPRINGS 8550 8.1 7.3 111 9.4 7.7 122
KIRWIN 9550 10.9 9.1 120 12.7 9.1 140
MARQUETTE 8760 8.3 -M * 10.9 7.4 147
MIDDLE POWDER 7760 9.8 9.0 109 9.6 9.6 100
OWL CREEK 8975 4.5 4.1 110 5.0 4.4 114
POWDER RIVER PASS 9480 11.1 8.7 128 12.9 9.9 130
SHELL CREEK 9580 16.0 11.8 136 14.1 10.8 131
SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115
SYLVAN ROAD 7120 11.9 11.4 104 15.5 15.5 100
TIMBER CREEK 7950 4.5 4.2 107 8.1 5.4 150
YOUNTS PEAK 8350 14.6 14.6 100 14.0 13.5 104
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Basin wide percent of average 110 118
SHOSHONE RIVER
BLACKWATER 9780 21.1 20.4 103 20.7 17.1 121
EVENING STAR 9200 24.2 25.0 97 26.2 21.7 121
KIRWIN 9550 10.9 9.1 120 12.7 9.1 140
MARQUETTE 8760 8.3 -M * 10.9 7.4 147
SYLVAN LAKE 8420 15.4 18.7 82 20.4 17.8 115
SYLVAN ROAD 7120 11.9 11.4 104 15.5 15.5 100
YOUNTS PEAK 8350 14.6 14.6 100 14.0 13.5 104
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Basin wide percent of average 99 118
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.7 4.3 179 7.7 6.4 120
BIG GOOSE 7990 9.0 7.6 118 12.6 6.8 185
BONE SPRINGS DIV 9350 17.9 13.2 136 13.7 11.5 119
BURGESS JUNCTION 7880 11.4 9.0 127 13.3 9.4 141
CLOUD PEAK RESERVOIR 9860 15.0 10.0 150 13.6 9.7 140
DOME LAKE 8880 13.0 9.5 137 13.5 10.2 132
GRAVE SPRINGS 8550 8.1 7.3 111 9.4 7.7 122
HANSEN SAWMILL 8360 5.8 5.2 112 7.7 6.3 122
LITTLE GOOSE 8870 10.2 -M * 14.7 -M *
MIDDLE POWDER 7760 9.8 9.0 109 9.6 9.6 100
POWDER RIVER PASS 9480 11.1 8.7 128 12.9 9.9 130
SOLDIER PARK 8720 12.3 -M * 9.1 -M *
SUCKER CREEK 8880 13.4 9.1 147 13.8 10.4 133
TIE CREEK 6870 6.8 4.9 139 12.8 7.8 164
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Basin wide percent of average 132 133
BELLE FOURCHE
BLIND PARK 6890 8.3 7.1 117 9.3 9.2 101
COLE CANYON 5910 6.5 5.6 116 7.8 5.5 142
NORTH RAPID CREEK 6130 7.6 6.7 113 7.4 7.4 100
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Basin wide percent of average 115 111
UPPER N. PLATTE RIVER
BLACKHALL MTN 9820 20.2 -M * 21.7 -M *
CINNABAR PARK 9574 15.2 .0 * 18.7 17.1 109
COLUMBINE 9160 17.7 21.7 82 18.2 20.7 88
DIVIDE PEAK 8880 13.1 15.5 85 17.0 16.9 101
ELK RIVER 8700 13.6 16.0 85 13.8 16.0 86
JOE WRIGHT 10120 12.5 17.1 73 17.3 20.0 86
NORTH FRENCH CREEK 10130 18.2 22.5 81 18.0 20.1 90
OLD BATTLE 10000 20.3 26.1 78 23.6 28.2 84
SAGE CREEK BASIN 7850 13.2 9.0 147 9.6 9.8 98
SOUTH BRUSH CREEK 8440 7.6 9.9 77 10.5 13.2 80
TOWER 10500 26.8 37.3 72 27.2 31.7 86
WEBBER SPRINGS 9250 15.6 21.1 74 19.2 21.9 88
WILLOW CREEK PASS 9540 -M 9.5 * 8.6 10.3 83
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Basin wide percent of average 89 89
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.4 18.9 87 17.6 17.4 101
CASPER MTN. 7900 17.5 11.2 156 17.1 11.0 155
DEADMAN HILL 10220 15.5 12.9 120 14.5 13.2 110
DEER PARK 9700 10.2 14.4 71 15.3 17.7 86
LAPRELE CREEK 8375 8.8 8.9 99 11.3 10.0 113
RENO HILL 8400 14.9 10.3 145 16.4 11.4 144
ROACH 9700 12.1 13.8 88 15.1 14.7 103
SAND LAKE 10050 21.7 25.0 87 21.3 19.2 111
SOUTH PASS 9040 12.5 14.0 89 12.1 14.9 81
WINDY PEAK 7900 6.8 6.0 113 8.6 8.4 102
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Basin wide percent of average 101 108
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.5 9.6 109 10.5 12.2 86
DIVIDE PEAK 8880 13.1 15.5 85 17.0 16.9 101
OLD BATTLE 10000 20.3 26.1 78 23.6 28.2 84
SANDSTONE RS 8150 10.2 12.4 82 11.1 15.5 72
WHISKEY PARK 8950 18.8 23.6 80 21.9 23.3 94
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Basin wide percent of average 84 88
UPPER GREEN RIVER
BIG SANDY OPENING 9080 11.6 12.0 97 11.7 11.3 104
BLIND BULL SUM 8650 19.6 22.9 86 15.5 18.9 82
EAST RIM DIVIDE 7930 10.0 11.0 91 10.4 10.2 102
ELKHART PARK G.S. 9400 11.5 11.0 105 12.5 10.9 115
GROS VENTRE SUMMIT 8750 8.3 11.4 73 8.7 10.7 81
GUNSIGHT PASS 9820 10.5 -M * 11.2 -M *
KENDALL R.S. 7740 13.4 12.3 109 14.1 12.4 114
LOOMIS PARK 8240 12.6 14.4 88 14.6 14.7 99
NEW FORK LAKE 8340 10.2 9.6 106 9.5 9.6 99
POCKET CREEK 9360 9.1 -M * 11.0 -M *
SNIDER BASIN 8060 11.6 12.4 94 11.7 13.6 86
SPRING CREEK DIVIDE 9000 20.2 22.0 92 20.2 22.3 91
TRIPLE PEAK 8500 20.2 20.7 98 22.7 20.6 110
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Basin wide percent of average 93 98
LOWER GREEN RIVER
HAMS FORK 7840 9.1 10.9 83 8.3 10.3 81
HEWINTA 9519 7.5 9.0 83 10.5 11.5 91
HICKERSON PARK 9145 7.9 5.8 136 10.3 6.2 166
HOLE-IN-ROCK 9150 7.0 5.7 123 10.3 5.7 181
INDIAN CREEK 9425 17.2 22.1 78 15.5 21.0 74
KELLEY R.S. 8180 11.5 13.9 83 13.5 17.1 79
STEEL CREEK PARK 10200 5.3 12.5 42 12.0 12.8 94
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Basin wide percent of average 82 95
UPPER BEAR RIVER
BUG LAKE 7950 12.2 17.0 72 13.3 16.0 83
HAYDEN FORK 9212 9.9 13.0 76 14.6 17.0 86
KELLEY R.S. 8180 11.5 13.9 83 13.5 17.1 79
LILY LAKE 9156 8.2 10.7 77 10.0 14.2 70
MONTE CRISTO 8960 15.6 24.5 64 15.7 21.0 75
SALT RIVER SUMMIT 7760 9.7 12.1 80 10.4 15.7 66
TRIAL LAKE 9992 11.5 20.5 56 11.6 20.4 57
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Basin wide percent of average 70 73
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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.