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: MAY 27 , 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 .0 1.4 0 24.3 26.6 91
COTTONWOOD CREEK 7670 7.7 8.3 93 39.0 35.2 111
GRAND TARGHEE 9260 42.8 -M * 43.0 -M *
GRANITE CREEK 6770 .1 3.4 3 27.3 24.4 112
GRASSY LAKE 7265 9.3 19.0 49 42.8 44.3 97
GROS VENTRE SUMMIT 8750 .4 6.0 7 19.1 17.2 111
GUNSIGHT PASS 9820 10.6 -M * 21.0 -M *
LEWIS LAKE DIVIDE 7850 19.6 22.3 88 42.5 44.7 95
PHILLIPS BENCH 8200 15.8 17.8 89 36.5 36.0 101
SALT RIVER SUMMIT 7760 .1 .0 21.0 23.7 89
SNAKE RIVER STATION 6920 .0 .0 100 29.0 27.9 104
SPRING CREEK DIVIDE 9000 19.2 18.9 102 33.4 32.6 102
THUMB DIVIDE 7980 .1 4.8 2 27.7 24.3 114
TOGWOTEE PASS 9580 25.3 24.4 104 36.5 32.1 114
TWO OCEAN PLATEAU 9240 37.8 27.7 136 37.8 35.6 106
WILLOW CREEK 8380 16.6 18.6 89 49.9 41.8 119
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Basin wide percent of average 88 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.5 22.9 98 27.5 26.4 104
BLACK BEAR 8170 31.0 30.9 100 45.6 49.5 92
CANYON 7870 .7 3.1 23 20.4 20.0 102
FISHER CREEK 9100 33.4 32.7 102 45.5 45.8 99
MADISON PLATEAU 7750 13.5 13.0 104 32.3 33.5 96
NORTHEAST ENTRANCE 7350 .0 .8 0 18.2 17.0 107
PARKER PEAK 9400 18.4 21.1 87 24.5 22.5 109
SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108
THUMB DIVIDE 7980 .1 4.8 2 27.7 24.3 114
TWO OCEAN PLATEAU 9240 37.8 27.7 136 37.8 35.6 106
WHISKEY CREEK 6800 5.1 3.9 131 26.5 26.7 99
WHITE MILL 8700 21.4 20.9 102 31.7 34.5 92
WOLVERINE 7650 .0 .4 0 17.2 17.8 97
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Basin wide percent of average 99 101
WIND RIVER
BURROUGHS CREEK 8750 8.3 6.0 138 22.1 22.0 100
COLD SPRINGS 9630 .0 1.2 0 16.2 16.5 98
DEER PARK 9700 6.1 12.7 48 24.3 30.3 80
HOBBS PARK 10100 9.8 12.8 77 22.0 20.3 108
LITTLE WARM 9370 .0 3.5 0 20.0 19.5 103
SOUTH PASS 9040 .9 8.8 10 21.2 25.5 83
ST. LAWRENCE ALT 8620 .0 1.0 0 15.1 14.7 103
TOGWOTEE PASS 9580 25.3 24.4 104 36.5 32.1 114
TOWNSEND CREEK 8700 .0 2.6 0 18.3 18.3 100
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Basin wide percent of average 69 98
BIGHORN BASIN
BALD MTN. 9380 14.1 19.5 72 20.1 24.7 81
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.6 96
BLACKWATER 9780 26.4 27.3 97 30.9 28.1 110
BONE SPRINGS DIV 9350 8.6 11.8 73 19.1 21.6 88
EVENING STAR 9200 24.3 29.1 84 40.2 33.5 120
GRAVE SPRINGS 8550 .0 2.8 0 13.2 15.6 85
KIRWIN 9550 4.5 7.8 58 20.0 16.9 118
MARQUETTE 8760 .0 6.0 0 14.0 17.2 81
MIDDLE POWDER 7760 .0 5.5 0 14.4 18.6 77
OWL CREEK 8975 .0 1.0 0 11.1 10.6 105
POWDER RIVER PASS 9480 3.6 3.9 92 19.8 18.9 105
SHELL CREEK 9580 12.5 13.1 95 20.6 19.9 104
SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108
SYLVAN ROAD 7120 .0 .3 0 25.4 22.8 111
TIMBER CREEK 7950 .0 1.1 0 13.4 13.7 98
YOUNTS PEAK 8350 10.5 10.3 102 20.9 21.5 97
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Basin wide percent of average 74 100
SHOSHONE RIVER
BLACKWATER 9780 26.4 27.3 97 30.9 28.1 110
EVENING STAR 9200 24.3 29.1 84 40.2 33.5 120
KIRWIN 9550 4.5 7.8 58 20.0 16.9 118
MARQUETTE 8760 .0 6.0 0 14.0 17.2 81
SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108
SYLVAN ROAD 7120 .0 .3 0 25.4 22.8 111
YOUNTS PEAK 8350 10.5 10.3 102 20.9 21.5 97
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Basin wide percent of average 80 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.6 96
BIG GOOSE 7990 .0 5.8 0 16.9 15.9 106
BONE SPRINGS DIV 9350 8.6 11.8 73 19.1 21.6 88
BURGESS JUNCTION 7880 2.6 5.5 47 16.3 18.0 91
CLOUD PEAK RESERVOIR 9860 11.0 10.9 101 22.0 20.9 105
DOME LAKE 8880 .0 5.3 0 20.4 20.0 102
GRAVE SPRINGS 8550 .0 2.8 0 13.2 15.6 85
HANSEN SAWMILL 8360 .0 .6 0 13.4 13.5 99
MIDDLE POWDER 7760 .0 5.5 0 14.4 18.6 77
POWDER RIVER PASS 9480 3.6 3.9 92 19.8 18.9 105
SUCKER CREEK 8880 5.3 6.0 88 22.1 20.9 106
TIE CREEK 6870 .0 .0 100 18.0 16.6 108
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Basin wide percent of average 53 97
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 19.0 17.2 110
COLE CANYON 5910 .0 .0 100 15.6 12.3 127
NORTH RAPID CREEK 6130 .0 .0 100 18.2 13.6 134
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Basin wide percent of average * 123
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 5.2 0 33.5 31.8 105
DIVIDE PEAK 8880 .6 6.5 9 34.4 27.0 127
ELK RIVER 8700 .1 2.7 4 26.8 25.5 105
JOE WRIGHT 10120 14.9 20.2 74 35.9 34.1 105
NORTH FRENCH CREEK 10130 26.0 28.1 93 40.4 33.6 120
OLD BATTLE 10000 32.3 29.9 108 48.7 43.6 112
SAGE CREEK BASIN 7850 .0 3.8 0 20.1 15.6 129
SOUTH BRUSH CREEK 8440 .0 3.0 0 23.3 23.1 101
TOWER 10500 35.0 47.1 74 51.4 49.3 104
WEBBER SPRINGS 9250 5.4 10.4 52 36.9 34.1 108
WILLOW CREEK PASS 9540 .0 5.9 0 18.0 18.2 99
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Basin wide percent of average 70 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 9.9 15.9 62 28.6 30.5 94
CASPER MTN. 7900 .0 6.4 0 20.1 23.3 86
DEADMAN HILL 10220 12.0 14.1 85 24.4 24.1 101
DEER PARK 9700 6.1 12.7 48 24.3 30.3 80
LAPRELE CREEK 8375 -M 1.5 * 17.2 19.5 88
RENO HILL 8400 .1 5.2 2 22.4 24.1 93
ROACH 9700 1.5 8.4 18 25.8 25.8 100
SAND LAKE 10050 29.6 30.3 98 38.0 33.5 113
SOUTH PASS 9040 .9 8.8 10 21.2 25.5 83
WINDY PEAK 7900 .5 .4 125 15.8 16.4 96
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Basin wide percent of average 59 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 23.6 20.6 115
DIVIDE PEAK 8880 .6 6.5 9 34.4 27.0 127
OLD BATTLE 10000 32.3 29.9 108 48.7 43.6 112
SANDSTONE RS 8150 .1 .9 11 26.2 24.3 108
WHISKEY PARK 8950 2.7 18.8 14 42.0 37.2 113
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Basin wide percent of average 64 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .0 4.3 0 18.5 18.1 102
BLIND BULL SUM 8650 25.1 20.8 121 26.3 27.6 95
EAST RIM DIVIDE 7930 .0 4.4 0 15.4 15.7 98
ELKHART PARK G.S. 9400 .5 5.6 9 19.3 18.5 104
GROS VENTRE SUMMIT 8750 .4 6.0 7 19.1 17.2 111
GUNSIGHT PASS 9820 10.6 -M * 21.0 -M *
KENDALL R.S. 7740 .1 .0 17.4 18.2 96
LOOMIS PARK 8240 .1 5.1 2 22.6 22.1 102
NEW FORK LAKE 8340 .0 .0 100 14.9 15.4 97
SNIDER BASIN 8060 -M 2.5 * 18.4 20.1 92
SPRING CREEK DIVIDE 9000 19.2 18.9 102 33.4 32.6 102
TRIPLE PEAK 8500 6.2 9.5 65 34.0 31.4 108
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Basin wide percent of average 69 101
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 16.5 16.6 99
HEWINTA 9519 .0 1.4 0 17.7 19.9 89
HICKERSON PARK 9145 .0 .3 0 14.5 12.2 119
HOLE-IN-ROCK 9150 .0 .3 0 13.4 11.8 114
INDIAN CREEK 9425 -M 18.2 * 27.7 32.0 87
KELLEY R.S. 8180 .0 4.2 0 23.0 25.8 89
STEEL CREEK PARK 10200 7.3 14.5 50 21.7 22.7 96
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Basin wide percent of average 35 95
UPPER BEAR RIVER
BUG LAKE 7950 .2 5.0 4 22.6 24.7 91
HAYDEN FORK 9212 .1 3.0 3 27.7 27.9 99
KELLEY R.S. 8180 .0 4.2 0 23.0 25.8 89
LILY LAKE 9156 .0 2.8 0 21.8 23.6 92
MONTE CRISTO 8960 6.3 16.4 38 32.7 33.5 98
SALT RIVER SUMMIT 7760 .1 .0 21.0 23.7 89
TRIAL LAKE 9992 6.1 18.0 34 30.7 32.7 94
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Basin wide percent of average 26 94
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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.