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 2 , 2012
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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 5.3 11.9 45 26.2 24.5 107
BLACK BEAR 8170 42.6 39.8 107 49.4 46.0 107
BLIND BULL SUM 8650 24.1 27.7 87 19.1 25.3 75
COTTONWOOD CREEK 7670 12.3 19.4 63 28.1 32.1 88
EAST RIM DIVIDE 7930 .0 13.0 0 12.6 14.0 90
GRAND TARGHEE 9260 37.6 -M * 33.7 -M *
GRANITE CREEK 6770 3.3 12.5 26 18.5 22.5 82
GRASSY LAKE 7265 26.7 33.0 81 43.9 41.0 107
GROS VENTRE SUMMIT 8750 1.4 13.1 11 12.2 15.3 80
GUNSIGHT PASS 9820 9.8 -M * 16.6 -M *
LEWIS LAKE DIVIDE 7850 28.6 34.3 83 39.9 41.8 95
PHILLIPS BENCH 8200 18.8 29.2 64 28.4 33.2 86
SALT RIVER SUMMIT 7760 .0 10.3 0 11.9 21.7 55
SNAKE RIVER STATION 6920 3.1 11.8 26 27.6 25.6 108
SPRING CREEK DIVIDE 9000 22.0 28.4 77 25.3 30.3 83
THUMB DIVIDE 7980 9.6 14.6 66 21.7 22.1 98
TOGWOTEE PASS 9580 20.9 28.0 75 27.1 29.1 93
TWO OCEAN PLATEAU 9240 36.5 31.8 115 32.2 32.2 100
WILLOW CREEK 8380 17.4 30.4 57 37.2 37.9 98
YOUNTS PEAK 8350 13.1 18.1 72 18.1 18.9 96
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Basin wide percent of average 70 93
MADISON-GALLATIN
BLACK BEAR 8170 42.6 39.8 107 49.4 46.0 107
CANYON 7870 9.6 11.0 87 18.7 17.8 105
MADISON PLATEAU 7750 24.9 24.0 104 36.9 30.5 121
WEST YELLOWSTONE 6700 .0 5.6 0 20.8 15.1 138
WHISKEY CREEK 6800 12.6 14.9 85 27.8 24.3 114
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Basin wide percent of average 94 115
YELLOWSTONE
BEARTOOTH LAKE 9360 27.3 25.9 105 28.6 23.6 121
BURNT MTN 5880 .0 .9 0 14.3 20.4 70
CANYON 7870 9.6 11.0 87 18.7 17.8 105
COLE CREEK 7850 12.8 19.6 65 14.5 22.1 66
EVENING STAR 9200 30.3 33.3 91 37.4 30.0 125
FISHER CREEK 9100 40.2 37.7 107 42.1 42.1 100
NORTHEAST ENTRANCE 7350 .4 6.7 6 16.4 14.9 110
PARKER PEAK 9400 24.3 24.5 99 27.2 19.6 139
SYLVAN LAKE 8420 15.2 23.5 65 30.2 24.8 122
THUMB DIVIDE 7980 9.6 14.6 66 21.7 22.1 98
TWO OCEAN PLATEAU 9240 36.5 31.8 115 32.2 32.2 100
WHITE MILL 8700 26.5 26.3 101 29.3 31.3 94
WOLVERINE 7650 .0 6.9 0 14.5 15.3 95
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Basin wide percent of average 89 103
WIND RIVER
BURROUGHS CREEK 8750 11.2 13.4 84 15.4 19.4 79
CASTLE CREEK 8400 .0 -M * 9.2 -M *
COLD SPRINGS 9630 .0 4.8 0 9.9 14.0 71
DEER PARK 9700 7.2 18.5 39 20.0 27.1 74
HOBBS PARK 10100 9.6 18.0 53 15.2 17.1 89
KIRWIN 9550 6.3 12.9 49 15.7 14.3 110
LITTLE WARM 9370 .0 10.8 0 13.2 16.9 78
OWL CREEK 8975 .0 3.9 0 5.9 8.3 71
SOUTH PASS 9040 7.6 17.8 43 14.9 22.8 65
ST. LAWRENCE ALT 8620 .0 6.0 0 8.5 12.2 70
TOGWOTEE PASS 9580 20.9 28.0 75 27.1 29.1 93
TOWNSEND CREEK 8700 .0 8.8 0 12.9 15.6 83
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Basin wide percent of average 44 81
BIGHORN BASIN
BALD MTN. 9380 23.2 23.5 99 18.9 21.5 88
BEAR TRAP MEADOW 8200 .0 2.3 0 11.3 11.0 103
BONE SPRINGS DIV 9350 18.9 18.3 103 19.0 18.4 103
GRAVE SPRINGS 8550 3.4 11.0 31 13.3 13.2 101
KIRWIN 9550 6.3 12.9 49 15.7 14.3 110
MARQUETTE 8760 .0 -M * 12.9 13.8 93
MIDDLE POWDER 7760 5.8 14.2 41 13.4 15.9 84
OWL CREEK 8975 .0 3.9 0 5.9 8.3 71
POWDER RIVER PASS 9480 5.9 10.5 56 19.1 15.9 120
SHELL CREEK 9580 20.4 16.8 121 20.1 16.9 119
TIMBER CREEK 7950 .0 4.8 0 9.6 10.6 91
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Basin wide percent of average 71 100
SHOSHONE RIVER
BLACKWATER 9780 25.5 28.9 88 27.8 24.8 112
EVENING STAR 9200 30.3 33.3 91 37.4 30.0 125
MARQUETTE 8760 .0 -M * 12.9 13.8 93
SYLVAN ROAD 7120 .0 7.8 0 21.9 20.6 106
YOUNTS PEAK 8350 13.1 18.1 72 18.1 18.9 96
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Basin wide percent of average 78 109
POWDER RIVER
BEAR TRAP MEADOW 8200 .0 2.3 0 11.3 11.0 103
CLOUD PEAK RESERVOIR 9860 11.0 16.2 68 18.4 17.3 106
GRAVE SPRINGS 8550 3.4 11.0 31 13.3 13.2 101
HANSEN SAWMILL 8360 .0 4.7 0 10.0 11.1 90
MIDDLE POWDER 7760 5.8 14.2 41 13.4 15.9 84
POWDER RIVER PASS 9480 5.9 10.5 56 19.1 15.9 120
SOLDIER PARK 8720 .0 -M * 11.8 -M *
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Basin wide percent of average 44 101
TONGUE RIVER
BIG GOOSE 7990 2.2 11.5 19 16.5 13.0 127
BONE SPRINGS DIV 9350 18.9 18.3 103 19.0 18.4 103
BURGESS JUNCTION 7880 8.3 13.1 63 16.1 15.5 104
DOME LAKE 8880 10.2 13.3 77 19.0 16.9 112
LITTLE GOOSE 8870 1.0 -M * 19.8 -M *
SUCKER CREEK 8880 8.1 12.9 63 18.5 17.6 105
TIE CREEK 6870 .0 3.9 0 16.0 13.6 118
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Basin wide percent of average 65 111
BELLE FOURCHE
COLE CANYON 5910 .0 4.5 0 11.3 9.6 118
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Basin wide percent of average 0 118
CHEYENNE RIVER BASIN
BLIND PARK 6890 .0 4.0 0 13.0 14.3 91
NORTH RAPID CREEK 6130 .0 3.4 0 10.3 11.5 90
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Basin wide percent of average 0 90
UPPER N. PLATTE
ARAPAHO RIDGE 10960 10.8 26.0 42 19.1 31.0 62
BLACKHALL MTN 9820 16.0 -M * 26.0 -M *
COLUMBINE 9160 -M 20.5 * 22.4 29.3 76
DIVIDE PEAK 8880 -M 19.0 * 20.9 24.4 86
JOE WRIGHT 10120 -M 25.1 * -M 30.3 *
LAPRELE CREEK 8375 .0 6.9 0 13.3 16.6 80
NORTH FRENCH CREEK 10130 13.7 34.5 40 22.4 29.9 75
NEVER SUMMER 10280 10.0 23.8 42 12.8 28.8 44
OLD BATTLE 10000 23.2 37.0 63 30.3 40.1 76
RAWAH 9020 .0 16.1 0 13.6 19.9 68
SAGE CREEK BASIN 7850 -M 11.0 * 11.5 14.2 81
SAND LAKE 10050 22.5 37.0 61 26.0 29.5 88
SOUTH BRUSH CREEK 8440 .1 10.8 1 12.9 20.3 64
TOWER 10500 26.3 52.3 50 35.5 45.3 78
WEBBER SPRINGS 9250 -M 24.8 * 24.0 31.3 77
WILLOW CREEK PASS 9540 -M 14.1 * 10.9 15.8 69
ZIRKEL 9340 .0 21.1 0 27.2 30.2 90
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Basin wide percent of average 40 74
SWEETWATER
DEER PARK 9700 7.2 18.5 39 20.0 27.1 74
LARSEN CREEK 9000 .1 -M * 16.0 -M *
SOUTH PASS 9040 7.6 17.8 43 14.9 22.8 65
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Basin wide percent of average 41 70
LOWER N. PLATTE
CASPER MTN. 7900 8.1 16.9 48 20.4 19.7 104
LAPRELE CREEK 8375 .0 6.9 0 13.3 16.6 80
RENO HILL 8400 7.3 14.5 50 21.0 20.4 103
WINDY PEAK 7900 .0 4.7 0 9.9 13.6 73
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Basin wide percent of average 36 92
LARAMIE RIVER
BROOKLYN LAKE 10240 7.8 28.1 28 21.1 27.1 78
CINNABAR PARK 9574 4.1 15.8 26 21.4 23.7 90
CROW CREEK 8330 .1 5.0 2 11.8 12.3 96
DEADMAN HILL 10220 12.7 19.7 64 18.1 21.1 86
RAWAH 9020 .0 16.1 0 13.6 19.9 68
ROACH 9700 5.3 18.3 29 18.8 22.6 83
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Basin wide percent of average 29 83
S. PLATTE
BLACK MOUNTAIN 8920 .0 -M * 13.9 -M *
CROW CREEK 8330 .1 5.0 2 11.8 12.3 96
DEADMAN HILL 10220 12.7 19.7 64 18.1 21.1 86
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Basin wide percent of average 52 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 4.3 0 13.4 18.7 72
DIVIDE PEAK 8880 -M 19.0 * 20.9 24.4 86
ELK RIVER 8700 -M 14.5 * 17.0 23.2 73
LITTLE SNAKE RIVER 8915 1.1 -M * 26.2 -M *
OLD BATTLE 10000 23.2 37.0 63 30.3 40.1 76
SAGE CREEK BASIN 7850 -M 11.0 * 11.5 14.2 81
SANDSTONE RS 8150 .0 9.1 0 13.1 22.0 60
WHISKEY PARK 8950 -M 30.4 * 26.9 34.0 79
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Basin wide percent of average 46* 75
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.8 13.2 67 15.8 16.0 99
BLIND BULL SUM 8650 24.1 27.7 87 19.1 25.3 75
EAST RIM DIVIDE 7930 .0 13.0 0 12.6 14.0 90
ELKHART PARK G.S. 9400 10.9 12.6 87 16.9 16.1 105
GROS VENTRE SUMMIT 8750 1.4 13.1 11 12.2 15.3 80
GUNSIGHT PASS 9820 9.8 -M * 16.6 -M *
KENDALL R.S. 7740 .6 9.6 6 15.7 16.6 95
LOOMIS PARK 8240 1.3 14.0 9 18.0 20.0 90
NEW FORK LAKE 8340 .7 8.2 9 12.3 13.5 91
POCKET CREEK 9360 7.7 -M * 14.0 -M *
SNIDER BASIN 8060 1.5 12.4 12 14.4 18.6 77
SPRING CREEK DIVIDE 9000 22.0 28.4 77 25.3 30.3 83
TRIPLE PEAK 8500 11.0 23.4 47 28.3 28.8 98
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Basin wide percent of average 47 89
LOWER GREEN RIVER
BLACKS FORK JCT 8870 .0 -M * 12.7 -M *
BUCK PASTURE 9700 .1 -M * 5.8 -M *
EF BLACKS FORK GS 9308 -M -M * 9.5 -M *
HAMS FORK 7840 .2 5.6 4 11.4 14.8 77
HEWINTA 9519 .0 9.0 0 14.9 17.9 83
HICKERSON PARK 9145 .0 5.4 0 14.1 10.3 137
HOLE-IN-ROCK 9150 .2 4.5 4 14.1 9.8 144
INDIAN CREEK 9425 14.0 28.1 50 20.3 29.6 69
KELLEY R.S. 8180 6.0 13.8 43 17.7 23.7 75
SPIRIT LK 10223 .4 -M * 20.0 -M *
STEEL CREEK PARK 10200 4.3 18.7 23 16.9 20.3 83
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Basin wide percent of average 29 87
UPPER BEAR RIVER
BEAR RIVER RS 8500 .0 -M * 12.2 -M *
BUG LAKE 7950 6.5 17.6 37 18.0 22.5 80
BURTS MILLER RANCH 8000 .4 -M * 10.6 -M *
CHALK CREEK #1 8993 9.8 25.1 39 22.7 30.2 75
HAYDEN FORK 9212 .2 12.6 2 20.9 25.3 83
KELLEY R.S. 8180 6.0 13.8 43 17.7 23.7 75
LILY LAKE 9156 .2 10.8 2 14.7 21.2 69
MONTE CRISTO 8960 9.9 28.0 35 22.5 30.4 74
SALT RIVER SUMMIT 7760 .0 10.3 0 11.9 21.7 55
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Basin wide percent of average 28 73
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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 1971-2000.
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.
