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 TUESDAY: MAY 5 , 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 8.9 11.1 80 22.8 24.6 93
COTTONWOOD CREEK 7670 26.9 18.7 144 37.6 32.4 116
GRAND TARGHEE 9260 55.1 -M * 41.7 -M *
GRANITE CREEK 6770 11.0 11.9 92 24.4 22.6 108
GRASSY LAKE 7265 32.0 32.2 99 41.5 41.3 100
GROS VENTRE SUMMIT 8750 14.0 12.7 110 18.8 15.5 121
GUNSIGHT PASS 9820 17.7 -M * 20.1 -M *
LEWIS LAKE DIVIDE 7850 36.8 33.7 109 40.1 42.0 95
PHILLIPS BENCH 8200 30.4 28.6 106 34.7 33.5 104
SALT RIVER SUMMIT 7760 13.3 9.6 139 20.1 21.9 92
SNAKE RIVER STATION 6920 12.5 10.9 115 27.6 25.8 107
SPRING CREEK DIVIDE 9000 32.8 28.1 117 32.0 30.5 105
THUMB DIVIDE 7980 20.5 13.9 147 26.0 22.3 117
TOGWOTEE PASS 9580 32.2 28.1 115 35.2 29.4 120
TWO OCEAN PLATEAU 9240 46.0 31.8 145 35.5 32.5 109
WILLOW CREEK 8380 35.8 29.8 120 47.1 38.2 123
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Basin wide percent of average 117 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 26.8 26.0 103 25.0 23.9 105
BLACK BEAR 8170 41.8 39.4 106 42.8 46.3 92
CANYON 7870 14.8 10.4 142 19.0 18.0 106
FISHER CREEK 9100 41.2 37.7 109 41.3 42.4 97
MADISON PLATEAU 7750 25.4 23.4 109 30.4 30.8 99
NORTHEAST ENTRANCE 7350 4.6 6.1 75 16.4 15.1 109
PARKER PEAK 9400 32.3 24.5 132 22.9 19.9 115
SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114
THUMB DIVIDE 7980 20.5 13.9 147 26.0 22.3 117
TWO OCEAN PLATEAU 9240 46.0 31.8 145 35.5 32.5 109
WHISKEY CREEK 6800 19.0 14.1 135 25.3 24.5 103
WHITE MILL 8700 28.3 26.2 108 28.6 31.6 91
WOLVERINE 7650 8.6 6.3 137 15.4 15.5 99
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Basin wide percent of average 117 103
WIND RIVER
BURROUGHS CREEK 8750 18.8 12.9 146 21.1 19.6 108
COLD SPRINGS 9630 9.4 4.6 204 15.2 14.3 106
DEER PARK 9700 15.5 17.6 88 22.5 27.4 82
HOBBS PARK 10100 18.4 17.9 103 20.4 17.4 117
LITTLE WARM 9370 13.2 10.3 128 19.0 17.2 110
SOUTH PASS 9040 15.5 17.4 89 19.8 23.1 86
ST. LAWRENCE ALT 8620 7.4 5.6 132 14.5 12.4 117
TOGWOTEE PASS 9580 32.2 28.1 115 35.2 29.4 120
TOWNSEND CREEK 8700 11.4 8.3 137 17.3 15.9 109
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Basin wide percent of average 116 105
BIGHORN BASIN
BALD MTN. 9380 21.0 23.4 90 18.7 21.8 86
BEAR TRAP MEADOW 8200 5.4 2.0 270 12.0 11.2 107
BLACKWATER 9780 30.6 29.1 105 28.3 25.1 113
BONE SPRINGS DIV 9350 18.4 18.1 102 17.5 18.7 94
EVENING STAR 9200 32.9 33.2 99 36.7 30.4 121
GRAVE SPRINGS 8550 9.6 10.7 90 12.4 13.5 92
KIRWIN 9550 15.7 12.8 123 18.8 14.6 129
MARQUETTE 8760 9.0 10.9 83 12.6 14.1 89
MIDDLE POWDER 7760 12.0 13.8 87 12.8 16.2 79
OWL CREEK 8975 4.8 3.6 133 9.9 8.5 116
POWDER RIVER PASS 9480 12.9 10.1 128 18.5 16.2 114
SHELL CREEK 9580 19.1 16.6 115 18.9 17.2 110
SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114
SYLVAN ROAD 7120 5.7 7.3 78 23.0 20.8 111
TIMBER CREEK 7950 5.0 4.6 109 11.8 10.9 108
YOUNTS PEAK 8350 21.0 18.0 117 19.6 19.1 103
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Basin wide percent of average 104 106
SHOSHONE RIVER
BLACKWATER 9780 30.6 29.1 105 28.3 25.1 113
EVENING STAR 9200 32.9 33.2 99 36.7 30.4 121
KIRWIN 9550 15.7 12.8 123 18.8 14.6 129
MARQUETTE 8760 9.0 10.9 83 12.6 14.1 89
SYLVAN LAKE 8420 22.8 23.2 98 28.6 25.1 114
SYLVAN ROAD 7120 5.7 7.3 78 23.0 20.8 111
YOUNTS PEAK 8350 21.0 18.0 117 19.6 19.1 103
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Basin wide percent of average 102 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 5.4 2.0 270 12.0 11.2 107
BIG GOOSE 7990 10.7 11.1 96 15.9 13.4 119
BONE SPRINGS DIV 9350 18.4 18.1 102 17.5 18.7 94
BURGESS JUNCTION 7880 13.2 12.8 103 15.6 15.8 99
CLOUD PEAK RESERVOIR 9860 20.1 16.1 125 21.0 17.6 119
DOME LAKE 8880 12.5 12.9 97 18.9 17.2 110
GRAVE SPRINGS 8550 9.6 10.7 90 12.4 13.5 92
HANSEN SAWMILL 8360 3.8 4.4 86 12.9 11.3 114
MIDDLE POWDER 7760 12.0 13.8 87 12.8 16.2 79
POWDER RIVER PASS 9480 12.9 10.1 128 18.5 16.2 114
SUCKER CREEK 8880 15.9 12.5 127 20.7 17.9 116
TIE CREEK 6870 3.3 3.6 92 17.4 13.9 125
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Basin wide percent of average 108 107
BELLE FOURCHE
BLIND PARK 6890 .0 3.7 0 17.3 14.6 118
COLE CANYON 5910 3.9 3.6 108 15.0 9.9 152
NORTH RAPID CREEK 6130 .0 2.7 0 16.9 11.7 144
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Basin wide percent of average 39 136
UPPER N. PLATTE RIVER
COLUMBINE 9160 17.5 19.6 89 32.7 29.5 111
DIVIDE PEAK 8880 26.1 18.3 143 33.2 24.6 135
ELK RIVER 8700 11.7 13.5 87 25.7 23.4 110
JOE WRIGHT 10120 -M 25.1 * -M 30.6 *
NORTH FRENCH CREEK 10130 40.0 34.5 116 38.9 30.2 129
OLD BATTLE 10000 41.3 37.2 111 46.9 40.4 116
SAGE CREEK BASIN 7850 8.8 10.6 83 19.4 14.3 136
SOUTH BRUSH CREEK 8440 8.7 10.2 85 22.6 20.5 110
TOWER 10500 51.8 52.4 99 50.2 45.8 110
WEBBER SPRINGS 9250 23.9 24.1 99 35.6 31.6 113
WILLOW CREEK PASS 9540 13.7 13.9 99 15.7 16.0 98
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Basin wide percent of average 104 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 26.1 27.8 94 27.6 27.5 100
CASPER MTN. 7900 14.0 16.4 85 17.6 20.1 88
DEADMAN HILL 10220 23.0 19.7 117 23.7 21.4 111
DEER PARK 9700 15.5 17.6 88 22.5 27.4 82
LAPRELE CREEK 8375 8.4 6.4 131 16.7 16.9 99
RENO HILL 8400 15.4 13.9 111 21.3 20.8 102
ROACH 9700 18.0 17.9 101 24.2 22.9 106
SAND LAKE 10050 37.1 37.0 100 36.4 29.9 122
SOUTH PASS 9040 15.5 17.4 89 19.8 23.1 86
WINDY PEAK 7900 8.8 4.2 210 14.9 13.9 107
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Basin wide percent of average 102 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 3.7 3 22.7 18.9 120
DIVIDE PEAK 8880 26.1 18.3 143 33.2 24.6 135
OLD BATTLE 10000 41.3 37.2 111 46.9 40.4 116
SANDSTONE RS 8150 11.1 8.3 134 25.1 22.2 113
WHISKEY PARK 8950 32.3 30.1 107 40.5 34.4 118
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Basin wide percent of average 114 120
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.9 12.7 102 16.2 16.2 100
BLIND BULL SUM 8650 31.4 27.4 115 24.4 25.5 96
EAST RIM DIVIDE 7930 4.1 12.6 33 14.4 14.1 102
ELKHART PARK G.S. 9400 15.3 12.3 124 18.6 16.3 114
GROS VENTRE SUMMIT 8750 14.0 12.7 110 18.8 15.5 121
GUNSIGHT PASS 9820 17.7 -M * 20.1 -M *
KENDALL R.S. 7740 5.1 8.8 58 16.7 16.8 99
LOOMIS PARK 8240 12.4 13.5 92 21.8 20.2 108
NEW FORK LAKE 8340 8.6 7.6 113 13.9 13.6 102
SNIDER BASIN 8060 12.3 11.8 104 17.8 18.7 95
SPRING CREEK DIVIDE 9000 32.8 28.1 117 32.0 30.5 105
TRIPLE PEAK 8500 23.3 22.7 103 31.7 29.0 109
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Basin wide percent of average 101 105
LOWER GREEN RIVER
HAMS FORK 7840 5.3 5.0 106 15.3 15.0 102
HEWINTA 9519 3.5 8.3 42 17.3 18.1 96
HICKERSON PARK 9145 2.9 4.9 59 13.4 10.5 128
HOLE-IN-ROCK 9150 2.8 4.1 68 12.8 10.0 128
INDIAN CREEK 9425 -M 27.6 * 26.8 29.8 90
KELLEY R.S. 8180 14.4 13.2 109 21.8 23.9 91
STEEL CREEK PARK 10200 17.4 18.9 92 21.0 20.6 102
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Basin wide percent of average 85 100
UPPER BEAR RIVER
BUG LAKE 7950 16.9 16.7 101 21.8 22.7 96
HAYDEN FORK 9212 9.2 11.9 77 27.4 25.5 107
KELLEY R.S. 8180 14.4 13.2 109 21.8 23.9 91
LILY LAKE 9156 10.3 10.2 101 21.6 21.4 101
MONTE CRISTO 8960 26.8 27.4 98 32.0 30.7 104
SALT RIVER SUMMIT 7760 13.3 9.6 139 20.1 21.9 92
TRIAL LAKE 9992 26.4 26.2 101 29.7 29.8 100
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Basin wide percent of average 102 99
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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.