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 SATURDAY: MAY 23 , 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 3.3 0 24.5 26.2 94
COTTONWOOD CREEK 7670 11.8 10.4 113 38.4 34.7 111
GRAND TARGHEE 9260 42.8 -M * 42.5 -M *
GRANITE CREEK 6770 .2 5.0 4 26.8 24.1 111
GRASSY LAKE 7265 14.7 22.0 67 43.0 43.8 98
GROS VENTRE SUMMIT 8750 2.5 7.5 33 19.1 16.9 113
GUNSIGHT PASS 9820 12.7 -M * 20.9 -M *
LEWIS LAKE DIVIDE 7850 24.7 24.9 99 42.2 44.3 95
PHILLIPS BENCH 8200 19.1 20.2 95 36.3 35.6 102
SALT RIVER SUMMIT 7760 .2 1.5 13 20.4 23.4 87
SNAKE RIVER STATION 6920 .0 2.1 0 28.8 27.5 105
SPRING CREEK DIVIDE 9000 22.4 21.2 106 32.8 32.3 102
THUMB DIVIDE 7980 5.1 6.6 77 27.6 24.0 115
TOGWOTEE PASS 9580 27.8 25.8 108 36.5 31.6 116
TWO OCEAN PLATEAU 9240 41.6 29.0 143 37.8 35.1 108
WILLOW CREEK 8380 20.6 21.2 97 48.5 41.2 118
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Basin wide percent of average 95 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.3 24.0 101 27.4 26.0 105
BLACK BEAR 8170 35.0 33.3 105 45.2 49.0 92
CANYON 7870 5.3 4.3 123 20.1 19.6 103
FISHER CREEK 9100 39.6 34.0 116 45.2 45.2 100
MADISON PLATEAU 7750 17.1 15.6 110 32.1 33.0 97
NORTHEAST ENTRANCE 7350 .1 1.3 8 18.0 16.7 108
PARKER PEAK 9400 23.2 22.5 103 24.4 22.0 111
SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110
THUMB DIVIDE 7980 5.1 6.6 77 27.6 24.0 115
TWO OCEAN PLATEAU 9240 41.6 29.0 143 37.8 35.1 108
WHISKEY CREEK 6800 9.1 6.1 149 26.4 26.3 100
WHITE MILL 8700 25.0 22.5 111 31.5 34.0 93
WOLVERINE 7650 .0 1.1 0 16.9 17.4 97
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Basin wide percent of average 113 102
WIND RIVER
BURROUGHS CREEK 8750 11.1 7.6 146 21.7 21.6 100
COLD SPRINGS 9630 .0 1.6 0 15.7 16.2 97
DEER PARK 9700 7.7 15.1 51 23.0 29.8 77
HOBBS PARK 10100 11.3 14.6 77 21.3 19.9 107
LITTLE WARM 9370 2.1 4.9 43 19.7 19.1 103
SOUTH PASS 9040 3.2 10.3 31 20.0 25.2 79
ST. LAWRENCE ALT 8620 .1 1.5 7 14.6 14.3 102
TOGWOTEE PASS 9580 27.8 25.8 108 36.5 31.6 116
TOWNSEND CREEK 8700 .0 3.5 0 17.9 17.9 100
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Basin wide percent of average 75 97
BIGHORN BASIN
BALD MTN. 9380 17.5 21.2 83 20.0 24.3 82
BEAR TRAP MEADOW 8200 .1 .0 12.4 13.2 94
BLACKWATER 9780 29.1 28.3 103 30.9 27.5 112
BONE SPRINGS DIV 9350 12.4 13.4 93 18.9 21.1 90
EVENING STAR 9200 27.4 30.6 90 40.0 33.0 121
GRAVE SPRINGS 8550 .3 3.6 8 12.3 15.3 80
KIRWIN 9550 7.2 9.2 78 19.9 16.5 121
MARQUETTE 8760 .1 7.0 1 13.4 16.7 80
MIDDLE POWDER 7760 2.1 7.2 29 13.3 18.2 73
OWL CREEK 8975 .1 1.2 8 10.3 10.2 101
POWDER RIVER PASS 9480 5.7 5.4 106 19.4 18.5 105
SHELL CREEK 9580 14.9 14.3 104 20.3 19.4 105
SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110
SYLVAN ROAD 7120 .2 .7 29 25.3 22.5 112
TIMBER CREEK 7950 .0 1.3 0 12.1 13.3 91
YOUNTS PEAK 8350 14.0 12.4 113 20.8 21.0 99
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Basin wide percent of average 84 100
SHOSHONE RIVER
BLACKWATER 9780 29.1 28.3 103 30.9 27.5 112
EVENING STAR 9200 27.4 30.6 90 40.0 33.0 121
KIRWIN 9550 7.2 9.2 78 19.9 16.5 121
MARQUETTE 8760 .1 7.0 1 13.4 16.7 80
SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110
SYLVAN ROAD 7120 .2 .7 29 25.3 22.5 112
YOUNTS PEAK 8350 14.0 12.4 113 20.8 21.0 99
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Basin wide percent of average 88 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .0 12.4 13.2 94
BIG GOOSE 7990 2.7 7.3 37 16.5 15.5 106
BONE SPRINGS DIV 9350 12.4 13.4 93 18.9 21.1 90
BURGESS JUNCTION 7880 6.2 7.2 86 16.0 17.7 90
CLOUD PEAK RESERVOIR 9860 13.5 12.3 110 22.0 20.4 108
DOME LAKE 8880 2.8 7.2 39 19.7 19.6 101
GRAVE SPRINGS 8550 .3 3.6 8 12.3 15.3 80
HANSEN SAWMILL 8360 .0 .9 0 13.2 13.1 101
MIDDLE POWDER 7760 2.1 7.2 29 13.3 18.2 73
POWDER RIVER PASS 9480 5.7 5.4 106 19.4 18.5 105
SUCKER CREEK 8880 8.7 7.6 114 21.5 20.4 105
TIE CREEK 6870 .0 .2 0 17.7 16.2 109
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Basin wide percent of average 75 97
BELLE FOURCHE
BLIND PARK 6890 -M .0 * 18.2 16.8 108
COLE CANYON 5910 .1 .0 15.2 11.9 128
NORTH RAPID CREEK 6130 -M .1 * 17.8 13.2 135
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Basin wide percent of average * 122
UPPER N. PLATTE RIVER
COLUMBINE 9160 .1 8.0 1 33.2 31.4 106
DIVIDE PEAK 8880 4.5 8.7 52 33.5 26.6 126
ELK RIVER 8700 .1 4.2 2 26.0 25.2 103
JOE WRIGHT 10120 -M 21.8 * -M 33.5 *
NORTH FRENCH CREEK 10130 27.9 30.4 92 39.6 33.0 120
OLD BATTLE 10000 33.3 32.3 103 47.4 43.1 110
SAGE CREEK BASIN 7850 .0 5.0 0 19.6 15.4 127
SOUTH BRUSH CREEK 8440 .0 4.2 0 22.7 22.7 100
TOWER 10500 38.3 49.2 78 51.0 48.7 105
WEBBER SPRINGS 9250 8.5 13.2 64 35.9 33.7 107
WILLOW CREEK PASS 9540 2.0 7.9 25 16.5 17.8 93
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Basin wide percent of average 70 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 12.9 18.7 69 28.5 30.0 95
CASPER MTN. 7900 .2 8.2 2 17.3 22.8 76
DEADMAN HILL 10220 13.7 15.8 87 23.8 23.7 100
DEER PARK 9700 7.7 15.1 51 23.0 29.8 77
LAPRELE CREEK 8375 .0 2.1 0 16.9 19.1 88
RENO HILL 8400 2.5 6.7 37 21.4 23.5 91
ROACH 9700 3.9 10.2 38 24.3 25.3 96
SAND LAKE 10050 29.1 32.7 89 37.2 32.9 113
SOUTH PASS 9040 3.2 10.3 31 20.0 25.2 79
WINDY PEAK 7900 .6 .8 75 15.8 16.0 99
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Basin wide percent of average 61 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 22.9 20.3 113
DIVIDE PEAK 8880 4.5 8.7 52 33.5 26.6 126
OLD BATTLE 10000 33.3 32.3 103 47.4 43.1 110
SANDSTONE RS 8150 .1 1.7 6 25.6 24.0 107
WHISKEY PARK 8950 -M 22.1 * -M 36.8 *
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Basin wide percent of average 89 114
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .2 6.1 3 17.0 17.8 96
BLIND BULL SUM 8650 28.7 22.5 128 25.6 27.2 94
EAST RIM DIVIDE 7930 .0 6.3 0 14.8 15.4 96
ELKHART PARK G.S. 9400 4.8 7.1 68 18.9 18.1 104
GROS VENTRE SUMMIT 8750 2.5 7.5 33 19.1 16.9 113
GUNSIGHT PASS 9820 12.7 -M * 20.9 -M *
KENDALL R.S. 7740 .1 .0 17.4 18.0 97
LOOMIS PARK 8240 .1 6.8 1 22.4 21.7 103
NEW FORK LAKE 8340 .0 1.2 0 15.1 15.1 100
SNIDER BASIN 8060 -M 4.5 * 18.1 19.9 91
SPRING CREEK DIVIDE 9000 22.4 21.2 106 32.8 32.3 102
TRIPLE PEAK 8500 10.0 12.4 81 33.8 31.0 109
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Basin wide percent of average 75 101
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 16.0 16.3 98
HEWINTA 9519 .0 2.3 0 17.3 19.6 88
HICKERSON PARK 9145 .0 .7 0 13.5 11.9 113
HOLE-IN-ROCK 9150 .0 .6 0 12.8 11.5 111
INDIAN CREEK 9425 -M 20.4 * 27.5 31.6 87
KELLEY R.S. 8180 .7 6.1 11 22.3 25.4 88
STEEL CREEK PARK 10200 8.6 16.1 53 21.0 22.3 94
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Basin wide percent of average 36 94
UPPER BEAR RIVER
BUG LAKE 7950 .2 7.0 3 22.1 24.3 91
HAYDEN FORK 9212 .0 4.5 0 27.3 27.5 99
KELLEY R.S. 8180 .7 6.1 11 22.3 25.4 88
LILY LAKE 9156 .0 4.0 0 21.6 23.2 93
MONTE CRISTO 8960 10.0 18.8 53 31.9 33.1 96
SALT RIVER SUMMIT 7760 .2 1.5 13 20.4 23.4 87
TRIAL LAKE 9992 9.1 20.1 45 29.9 32.2 93
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Basin wide percent of average 33 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.