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 25 , 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 12.2 15.5 79 14.8 18.0 82
COTTONWOOD CREEK 7670 21.2 17.6 120 24.6 22.2 111
GRAND TARGHEE 9260 31.5 -M * 26.6 -M *
GRANITE CREEK 6770 13.3 15.5 86 17.7 16.8 105
GRASSY LAKE 7265 24.1 28.4 85 27.2 30.0 91
GROS VENTRE SUMMIT 8750 9.3 11.1 84 11.1 10.4 107
GUNSIGHT PASS 9820 11.2 -M * 12.2 -M *
LEWIS LAKE DIVIDE 7850 20.2 28.6 71 24.0 30.4 79
PHILLIPS BENCH 8200 19.9 23.0 87 22.1 23.8 93
SALT RIVER SUMMIT 7760 11.2 11.7 96 12.6 15.3 82
SNAKE RIVER STATION 6920 13.1 15.9 82 17.0 18.9 90
SPRING CREEK DIVIDE 9000 21.3 21.3 100 21.5 21.8 99
THUMB DIVIDE 7980 12.2 14.7 83 13.9 15.4 90
TOGWOTEE PASS 9580 21.7 20.1 108 23.6 20.0 118
TWO OCEAN PLATEAU 9240 26.3 22.6 116 20.6 22.5 92
WILLOW CREEK 8380 26.6 24.5 109 31.1 26.1 119
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Basin wide percent of average 93 97
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 17.2 19.4 89 15.8 16.6 95
BLACK BEAR 8170 25.3 32.0 79 26.0 32.0 81
CANYON 7870 9.9 11.1 89 10.7 12.6 85
FISHER CREEK 9100 27.4 28.8 95 26.1 29.5 88
MADISON PLATEAU 7750 14.4 20.2 71 16.3 21.3 77
NORTHEAST ENTRANCE 7350 8.2 9.5 86 10.5 10.5 100
PARKER PEAK 9400 19.5 17.8 110 14.8 13.3 111
SYLVAN LAKE 8420 14.4 18.4 78 16.6 17.4 95
THUMB DIVIDE 7980 12.2 14.7 83 13.9 15.4 90
TWO OCEAN PLATEAU 9240 26.3 22.6 116 20.6 22.5 92
WHISKEY CREEK 6800 10.6 14.0 76 13.6 16.7 81
WHITE MILL 8700 18.2 19.7 92 18.1 22.0 82
WOLVERINE 7650 9.5 10.4 91 9.3 10.9 85
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Basin wide percent of average 89 88
WIND RIVER
BURROUGHS CREEK 8750 12.8 12.4 103 13.5 13.3 102
COLD SPRINGS 9630 5.3 7.1 75 7.1 8.2 87
DEER PARK 9700 7.6 14.3 53 11.5 17.3 66
HOBBS PARK 10100 7.6 11.7 65 7.8 9.6 81
LITTLE WARM 9370 8.4 9.3 90 10.6 10.6 100
SOUTH PASS 9040 8.1 13.8 59 10.0 14.6 68
ST. LAWRENCE ALT 8620 2.4 5.8 41 5.3 6.8 78
TOGWOTEE PASS 9580 21.7 20.1 108 23.6 20.0 118
TOWNSEND CREEK 8700 4.7 6.8 69 7.0 8.6 81
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Basin wide percent of average 78 88
BIGHORN BASIN
BALD MTN. 9380 15.3 15.6 98 12.6 13.7 92
BEAR TRAP MEADOW 8200 -M 4.2 * -M 6.2 *
BLACKWATER 9780 17.5 20.1 87 16.1 16.7 96
BONE SPRINGS DIV 9350 15.3 12.8 120 12.0 11.2 107
EVENING STAR 9200 22.8 24.4 93 24.1 21.1 114
GRAVE SPRINGS 8550 6.7 6.9 97 7.6 7.5 101
KIRWIN 9550 9.2 9.0 102 10.4 8.9 117
MARQUETTE 8760 3.1 6.8 46 6.2 7.3 85
MIDDLE POWDER 7760 8.5 8.7 98 8.6 9.3 92
OWL CREEK 8975 4.1 4.0 102 4.0 4.3 93
POWDER RIVER PASS 9480 10.4 8.5 122 11.9 9.7 123
SHELL CREEK 9580 13.9 11.6 120 13.4 10.6 126
SYLVAN LAKE 8420 14.4 18.4 78 16.6 17.4 95
SYLVAN ROAD 7120 11.2 11.0 102 14.3 15.3 93
TIMBER CREEK 7950 3.0 4.1 73 6.5 5.2 125
YOUNTS PEAK 8350 15.0 14.4 104 13.4 13.2 102
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Basin wide percent of average 97 104
SHOSHONE RIVER
BLACKWATER 9780 17.5 20.1 87 16.1 16.7 96
EVENING STAR 9200 22.8 24.4 93 24.1 21.1 114
KIRWIN 9550 9.2 9.0 102 10.4 8.9 117
MARQUETTE 8760 3.1 6.8 46 6.2 7.3 85
SYLVAN LAKE 8420 14.4 18.4 78 16.6 17.4 95
SYLVAN ROAD 7120 11.2 11.0 102 14.3 15.3 93
YOUNTS PEAK 8350 15.0 14.4 104 13.4 13.2 102
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Basin wide percent of average 90 101
POWDER-TONGUE
BEAR TRAP MEADOW 8200 -M 4.2 * -M 6.2 *
BIG GOOSE 7990 6.7 7.4 91 8.9 6.6 135
BONE SPRINGS DIV 9350 15.3 12.8 120 12.0 11.2 107
BURGESS JUNCTION 7880 9.3 8.7 107 10.0 9.2 109
CLOUD PEAK RESERVOIR 9860 13.5 9.7 139 12.8 9.5 135
DOME LAKE 8880 9.6 9.3 103 11.5 9.9 116
GRAVE SPRINGS 8550 6.7 6.9 97 7.6 7.5 101
HANSEN SAWMILL 8360 5.0 5.0 100 7.8 6.1 128
MIDDLE POWDER 7760 8.5 8.7 98 8.6 9.3 92
POWDER RIVER PASS 9480 10.4 8.5 122 11.9 9.7 123
SUCKER CREEK 8880 11.2 8.8 127 13.2 10.2 129
TIE CREEK 6870 4.0 4.7 85 10.4 7.7 135
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Basin wide percent of average 111 118
BELLE FOURCHE
BLIND PARK 6890 7.9 6.5 122 12.7 9.0 141
COLE CANYON 5910 5.0 5.5 91 9.4 5.3 177
NORTH RAPID CREEK 6130 7.9 6.5 122 10.9 7.2 151
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Basin wide percent of average 112 153
UPPER N. PLATTE RIVER
COLUMBINE 9160 23.0 21.1 109 21.7 20.1 108
DIVIDE PEAK 8880 18.4 15.1 122 20.1 16.4 123
ELK RIVER 8700 20.0 15.5 129 18.4 15.5 119
JOE WRIGHT 10120 17.9 16.7 107 21.7 19.4 112
NORTH FRENCH CREEK 10130 27.7 21.8 127 26.2 19.5 134
OLD BATTLE 10000 26.9 25.2 107 31.6 27.3 116
SAGE CREEK BASIN 7850 10.2 8.8 116 11.6 9.5 122
SOUTH BRUSH CREEK 8440 10.8 9.5 114 12.5 12.9 97
TOWER 10500 36.0 36.3 99 33.7 30.8 109
WEBBER SPRINGS 9250 20.3 20.3 100 23.5 21.3 110
WILLOW CREEK PASS 9540 10.5 9.3 113 9.6 10.0 96
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Basin wide percent of average 111 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.1 18.3 99 16.8 16.9 99
CASPER MTN. 7900 8.3 10.9 76 10.4 10.7 97
DEADMAN HILL 10220 12.7 12.5 102 13.0 12.7 102
DEER PARK 9700 7.6 14.3 53 11.5 17.3 66
LAPRELE CREEK 8375 7.7 8.6 90 8.3 9.6 86
RENO HILL 8400 9.0 10.0 90 10.3 11.1 93
ROACH 9700 12.7 13.4 95 14.7 14.2 104
SAND LAKE 10050 23.4 24.1 97 21.6 18.6 116
SOUTH PASS 9040 8.1 13.8 59 10.0 14.6 68
WINDY PEAK 7900 6.5 5.8 112 7.2 8.2 88
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Basin wide percent of average 87 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 14.0 9.3 151 14.6 11.9 123
DIVIDE PEAK 8880 18.4 15.1 122 20.1 16.4 123
OLD BATTLE 10000 26.9 25.2 107 31.6 27.3 116
SANDSTONE RS 8150 14.4 12.0 120 16.7 15.1 111
WHISKEY PARK 8950 25.9 22.8 114 27.5 22.7 121
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Basin wide percent of average 118 118
UPPER GREEN RIVER
BIG SANDY OPENING 9080 9.7 11.7 83 9.6 10.9 88
BLIND BULL SUM 8650 19.9 22.2 90 16.5 18.4 90
EAST RIM DIVIDE 7930 7.7 10.6 73 10.2 9.8 104
ELKHART PARK G.S. 9400 10.6 10.7 99 11.6 10.6 109
GROS VENTRE SUMMIT 8750 9.3 11.1 84 11.1 10.4 107
GUNSIGHT PASS 9820 11.2 -M * 12.2 -M *
KENDALL R.S. 7740 9.2 11.9 77 11.4 12.1 94
LOOMIS PARK 8240 13.3 13.9 96 15.6 14.3 109
NEW FORK LAKE 8340 9.6 9.3 103 8.9 9.3 96
SNIDER BASIN 8060 11.3 12.0 94 12.0 13.3 90
SPRING CREEK DIVIDE 9000 21.3 21.3 100 21.5 21.8 99
TRIPLE PEAK 8500 19.6 20.1 98 21.4 19.9 108
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Basin wide percent of average 91 99
LOWER GREEN RIVER
HAMS FORK 7840 8.6 10.5 82 8.8 10.0 88
HEWINTA 9519 6.3 8.7 72 9.1 11.2 81
HICKERSON PARK 9145 2.6 5.6 46 5.1 6.0 85
HOLE-IN-ROCK 9150 2.9 5.4 54 5.1 5.6 91
INDIAN CREEK 9425 18.0 21.4 84 16.9 20.4 83
KELLEY R.S. 8180 11.7 13.4 87 13.4 16.6 81
STEEL CREEK PARK 10200 8.0 12.1 66 11.3 12.4 91
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Basin wide percent of average 75 85
UPPER BEAR RIVER
BUG LAKE 7950 13.9 16.4 85 13.2 15.6 85
HAYDEN FORK 9212 12.8 12.6 102 15.6 16.5 95
KELLEY R.S. 8180 11.7 13.4 87 13.4 16.6 81
LILY LAKE 9156 10.2 10.4 98 11.8 13.8 86
MONTE CRISTO 8960 19.6 23.6 83 20.0 20.4 98
SALT RIVER SUMMIT 7760 11.2 11.7 96 12.6 15.3 82
TRIAL LAKE 9992 17.9 19.8 90 17.4 19.7 88
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Basin wide percent of average 90 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.