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 26 , 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 1.9 0 24.3 26.5 92
COTTONWOOD CREEK 7670 9.0 8.9 101 39.0 35.1 111
GRAND TARGHEE 9260 43.4 -M * 43.0 -M *
GRANITE CREEK 6770 .2 3.8 5 27.3 24.4 112
GRASSY LAKE 7265 10.7 19.7 54 42.9 44.2 97
GROS VENTRE SUMMIT 8750 .7 6.4 11 19.1 17.1 112
GUNSIGHT PASS 9820 11.0 -M * 21.0 -M *
LEWIS LAKE DIVIDE 7850 20.8 23.0 90 42.4 44.6 95
PHILLIPS BENCH 8200 16.6 18.4 90 36.4 35.9 101
SALT RIVER SUMMIT 7760 .2 .0 21.1 23.6 89
SNAKE RIVER STATION 6920 .0 .5 0 29.0 27.8 104
SPRING CREEK DIVIDE 9000 20.0 19.5 103 33.3 32.5 102
THUMB DIVIDE 7980 .6 5.2 12 27.7 24.3 114
TOGWOTEE PASS 9580 25.5 24.8 103 36.5 32.0 114
TWO OCEAN PLATEAU 9240 38.9 28.0 139 37.8 35.5 106
WILLOW CREEK 8380 17.9 19.3 93 49.8 41.7 119
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Basin wide percent of average 90 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.8 23.2 98 27.5 26.3 105
BLACK BEAR 8170 32.2 31.5 102 45.6 49.4 92
CANYON 7870 1.7 3.5 49 20.3 19.9 102
FISHER CREEK 9100 34.7 33.0 105 45.4 45.7 99
MADISON PLATEAU 7750 14.4 13.6 106 32.3 33.4 97
NORTHEAST ENTRANCE 7350 .0 .9 0 18.2 16.9 108
PARKER PEAK 9400 19.3 21.5 90 24.4 22.4 109
SYLVAN LAKE 8420 -M 15.5 * 30.4 28.0 109
THUMB DIVIDE 7980 .6 5.2 12 27.7 24.3 114
TWO OCEAN PLATEAU 9240 38.9 28.0 139 37.8 35.5 106
WHISKEY CREEK 6800 6.2 4.5 138 26.4 26.6 99
WHITE MILL 8700 22.4 21.3 105 31.7 34.3 92
WOLVERINE 7650 .0 .6 0 17.0 17.7 96
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Basin wide percent of average 103 101
WIND RIVER
BURROUGHS CREEK 8750 9.1 6.3 144 22.0 21.9 100
COLD SPRINGS 9630 .0 1.3 0 16.2 16.5 98
DEER PARK 9700 6.6 13.2 50 24.2 30.1 80
HOBBS PARK 10100 9.7 13.2 73 21.7 20.2 107
LITTLE WARM 9370 .0 3.9 0 19.9 19.4 103
SOUTH PASS 9040 1.3 9.2 14 21.0 25.4 83
ST. LAWRENCE ALT 8620 .1 1.0 10 15.1 14.6 103
TOGWOTEE PASS 9580 25.5 24.8 103 36.5 32.0 114
TOWNSEND CREEK 8700 .0 2.8 0 17.9 18.2 98
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Basin wide percent of average 69 98
BIGHORN BASIN
BALD MTN. 9380 14.8 19.9 74 20.1 24.6 82
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.5 96
BLACKWATER 9780 26.9 27.7 97 30.9 28.0 110
BONE SPRINGS DIV 9350 9.6 12.2 79 18.9 21.5 88
EVENING STAR 9200 25.0 29.6 84 40.1 33.4 120
GRAVE SPRINGS 8550 .0 2.9 0 13.2 15.5 85
KIRWIN 9550 5.4 8.2 66 20.0 16.8 119
MARQUETTE 8760 .0 6.2 0 13.7 17.1 80
MIDDLE POWDER 7760 .0 6.0 0 14.4 18.5 78
OWL CREEK 8975 .1 1.1 9 10.9 10.4 105
POWDER RIVER PASS 9480 3.9 4.3 91 19.7 18.8 105
SHELL CREEK 9580 13.0 13.4 97 20.6 19.8 104
SYLVAN LAKE 8420 -M 15.5 * 30.4 28.0 109
SYLVAN ROAD 7120 .2 .4 50 25.4 22.7 112
TIMBER CREEK 7950 .1 1.1 9 13.4 13.6 99
YOUNTS PEAK 8350 11.1 10.8 103 20.9 21.3 98
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Basin wide percent of average 77 101
SHOSHONE RIVER
BLACKWATER 9780 26.9 27.7 97 30.9 28.0 110
EVENING STAR 9200 25.0 29.6 84 40.1 33.4 120
KIRWIN 9550 5.4 8.2 66 20.0 16.8 119
MARQUETTE 8760 .0 6.2 0 13.7 17.1 80
SYLVAN LAKE 8420 -M 15.5 * 30.4 28.0 109
SYLVAN ROAD 7120 .2 .4 50 25.4 22.7 112
YOUNTS PEAK 8350 11.1 10.8 103 20.9 21.3 98
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Basin wide percent of average 83 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.5 96
BIG GOOSE 7990 .0 6.2 0 16.9 15.8 107
BONE SPRINGS DIV 9350 9.6 12.2 79 18.9 21.5 88
BURGESS JUNCTION 7880 3.5 5.9 59 16.3 17.9 91
CLOUD PEAK RESERVOIR 9860 11.5 11.2 103 22.1 20.8 106
DOME LAKE 8880 .3 5.7 5 20.4 19.9 103
GRAVE SPRINGS 8550 .0 2.9 0 13.2 15.5 85
HANSEN SAWMILL 8360 .0 .7 0 13.4 13.4 100
MIDDLE POWDER 7760 .0 6.0 0 14.4 18.5 78
POWDER RIVER PASS 9480 3.9 4.3 91 19.7 18.8 105
SUCKER CREEK 8880 6.4 6.5 98 21.9 20.8 105
TIE CREEK 6870 .0 .0 100 17.9 16.5 108
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Basin wide percent of average 57 98
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 19.1 17.1 112
COLE CANYON 5910 .0 .0 100 15.5 12.2 127
NORTH RAPID CREEK 6130 -M .0 * 18.3 13.5 136
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Basin wide percent of average * 124
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 5.8 2 33.6 31.7 106
DIVIDE PEAK 8880 1.6 7.0 23 34.5 26.9 128
ELK RIVER 8700 .2 3.1 6 26.9 25.4 106
JOE WRIGHT 10120 -M 20.6 * -M 34.0 *
NORTH FRENCH CREEK 10130 -M 28.7 * -M 33.4 *
OLD BATTLE 10000 33.2 30.5 109 48.5 43.5 111
SAGE CREEK BASIN 7850 .0 4.1 0 20.1 15.6 129
SOUTH BRUSH CREEK 8440 .0 3.3 0 23.3 23.0 101
TOWER 10500 35.6 47.6 75 51.3 49.1 104
WEBBER SPRINGS 9250 6.3 11.1 57 36.9 34.0 109
WILLOW CREEK PASS 9540 .1 6.4 2 17.9 18.1 99
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Basin wide percent of average 65 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 10.7 16.6 64 28.6 30.4 94
CASPER MTN. 7900 .0 6.8 0 20.2 23.2 87
DEADMAN HILL 10220 12.2 14.6 84 24.3 24.0 101
DEER PARK 9700 6.6 13.2 50 24.2 30.1 80
LAPRELE CREEK 8375 .0 1.7 0 17.2 19.4 89
RENO HILL 8400 .5 5.6 9 22.5 23.9 94
ROACH 9700 2.0 8.9 22 25.6 25.6 100
SAND LAKE 10050 29.6 30.9 96 37.7 33.4 113
SOUTH PASS 9040 1.3 9.2 14 21.0 25.4 83
WINDY PEAK 7900 .6 .5 120 15.6 16.3 96
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Basin wide percent of average 59 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 23.7 20.5 116
DIVIDE PEAK 8880 1.6 7.0 23 34.5 26.9 128
OLD BATTLE 10000 33.2 30.5 109 48.5 43.5 111
SANDSTONE RS 8150 .1 1.1 9 26.3 24.3 108
WHISKEY PARK 8950 -M 19.7 * -M 37.1 *
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Basin wide percent of average 90 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .1 4.7 2 18.3 18.0 102
BLIND BULL SUM 8650 26.0 21.3 122 26.3 27.5 96
EAST RIM DIVIDE 7930 .0 4.9 0 15.4 15.6 99
ELKHART PARK G.S. 9400 2.5 6.0 42 19.2 18.4 104
GROS VENTRE SUMMIT 8750 .7 6.4 11 19.1 17.1 112
GUNSIGHT PASS 9820 11.0 -M * 21.0 -M *
KENDALL R.S. 7740 .1 .0 17.4 18.2 96
LOOMIS PARK 8240 .1 5.5 2 22.6 22.0 103
NEW FORK LAKE 8340 .0 .0 100 15.3 15.4 99
SNIDER BASIN 8060 .0 3.0 0 18.5 20.0 92
SPRING CREEK DIVIDE 9000 20.0 19.5 103 33.3 32.5 102
TRIPLE PEAK 8500 7.3 10.2 72 34.1 31.3 109
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Basin wide percent of average 70 101
LOWER GREEN RIVER
HAMS FORK 7840 .2 .0 16.3 16.5 99
HEWINTA 9519 .0 1.6 0 17.6 19.8 89
HICKERSON PARK 9145 .0 .4 0 14.3 12.1 118
HOLE-IN-ROCK 9150 .0 .3 0 13.1 11.7 112
INDIAN CREEK 9425 -M 18.8 * 27.7 31.9 87
KELLEY R.S. 8180 .6 4.7 13 22.6 25.7 88
STEEL CREEK PARK 10200 7.4 14.9 50 21.4 22.6 95
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Basin wide percent of average 37 95
UPPER BEAR RIVER
BUG LAKE 7950 .2 5.5 4 22.6 24.6 92
HAYDEN FORK 9212 .1 3.4 3 27.6 27.8 99
KELLEY R.S. 8180 .6 4.7 13 22.6 25.7 88
LILY LAKE 9156 .0 3.1 0 21.8 23.5 93
MONTE CRISTO 8960 7.5 17.0 44 32.4 33.4 97
SALT RIVER SUMMIT 7760 .2 .0 21.1 23.6 89
TRIAL LAKE 9992 7.0 18.5 38 30.4 32.5 94
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Basin wide percent of average 30 93
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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.