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: APRIL 21 , 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 11.9 15.4 77 25.8 23.5 110
BLACK BEAR 8170 43.4 40.9 106 46.5 44.3 105
BLIND BULL SUM 8650 24.6 28.7 86 18.1 24.3 74
COTTONWOOD CREEK 7670 16.0 22.7 70 26.3 30.5 86
EAST RIM DIVIDE 7930 2.0 14.0 14 12.2 13.3 92
GRAND TARGHEE 9260 39.5 -M * 32.3 -M *
GRANITE CREEK 6770 -M 15.7 * -M 21.6 *
GRASSY LAKE 7265 31.9 36.3 88 41.6 39.4 106
GROS VENTRE SUMMIT 8750 7.0 14.4 49 11.7 14.5 81
GUNSIGHT PASS 9820 12.0 -M * 15.7 -M *
LEWIS LAKE DIVIDE 7850 33.0 36.4 91 38.4 40.3 95
PHILLIPS BENCH 8200 23.3 30.6 76 27.3 31.9 86
SALT RIVER SUMMIT 7760 5.9 13.4 44 11.6 20.8 56
SNAKE RIVER STATION 6920 10.4 15.9 65 26.7 24.6 109
SPRING CREEK DIVIDE 9000 23.4 28.9 81 23.8 29.1 82
THUMB DIVIDE 7980 14.9 17.6 85 20.5 21.0 98
TOGWOTEE PASS 9580 22.8 27.3 84 25.8 27.6 93
TWO OCEAN PLATEAU 9240 36.5 31.3 117 30.6 30.7 100
WILLOW CREEK 8380 21.7 31.9 68 34.8 35.9 97
YOUNTS PEAK 8350 16.1 18.2 88 16.9 18.0 94
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Basin wide percent of average 81 93
MADISON-GALLATIN
BLACK BEAR 8170 43.4 40.9 106 46.5 44.3 105
CANYON 7870 12.0 13.0 92 17.1 17.0 101
MADISON PLATEAU 7750 28.1 25.8 109 34.8 29.5 118
WEST YELLOWSTONE 6700 3.1 9.4 33 19.3 14.4 134
WHISKEY CREEK 6800 16.2 17.3 94 26.4 23.2 114
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Basin wide percent of average 97 112
YELLOWSTONE
BEARTOOTH LAKE 9360 27.5 25.7 107 26.9 22.4 120
BURNT MTN 5880 .0 3.8 0 14.1 18.4 77
CANYON 7870 12.0 13.0 92 17.1 17.0 101
COLE CREEK 7850 16.3 18.8 87 14.2 20.0 71
EVENING STAR 9200 32.1 32.4 99 35.7 28.5 125
FISHER CREEK 9100 39.1 37.6 104 39.1 40.2 97
NORTHEAST ENTRANCE 7350 5.1 9.5 54 -M 14.1 *
PARKER PEAK 9400 27.5 23.9 115 25.7 18.4 140
SYLVAN LAKE 8420 18.3 24.2 76 27.5 23.5 117
THUMB DIVIDE 7980 14.9 17.6 85 20.5 21.0 98
TWO OCEAN PLATEAU 9240 36.5 31.3 117 30.6 30.7 100
WHITE MILL 8700 26.6 26.3 101 27.4 29.8 92
WOLVERINE 7650 1.7 9.8 17 14.4 14.4 100
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Basin wide percent of average 94 103
WIND RIVER
BURROUGHS CREEK 8750 13.8 14.8 93 14.9 18.3 81
CASTLE CREEK 8400 .2 -M * 9.0 -M *
COLD SPRINGS 9630 .1 5.8 2 9.7 12.7 76
DEER PARK 9700 10.7 17.9 60 19.4 25.2 77
HOBBS PARK 10100 13.5 17.1 79 14.5 15.5 94
KIRWIN 9550 11.8 12.5 94 15.2 13.1 116
LITTLE WARM 9370 6.4 12.1 53 12.5 15.6 80
OWL CREEK 8975 .0 4.7 0 5.9 7.3 81
SOUTH PASS 9040 12.4 17.9 69 14.6 21.2 69
ST. LAWRENCE ALT 8620 .1 6.6 2 8.3 10.9 76
TOGWOTEE PASS 9580 22.8 27.3 84 25.8 27.6 93
TOWNSEND CREEK 8700 3.1 9.6 32 12.3 14.2 87
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Basin wide percent of average 65 84
BIGHORN BASIN
BALD MTN. 9380 22.6 22.6 100 17.2 19.9 86
BEAR TRAP MEADOW 8200 1.2 3.7 32 10.7 10.0 107
BONE SPRINGS DIV 9350 21.3 17.8 120 17.8 17.0 105
GRAVE SPRINGS 8550 6.6 11.0 60 12.1 12.0 101
KIRWIN 9550 11.8 12.5 94 15.2 13.1 116
MARQUETTE 8760 7.1 -M * 12.7 12.2 104
MIDDLE POWDER 7760 9.9 14.3 69 12.6 14.5 87
OWL CREEK 8975 .0 4.7 0 5.9 7.3 81
POWDER RIVER PASS 9480 9.3 11.7 79 17.4 14.5 120
SHELL CREEK 9580 20.0 16.3 123 18.0 15.5 116
TIMBER CREEK 7950 .1 5.2 2 9.6 9.2 104
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Basin wide percent of average 86 103
SHOSHONE RIVER
BLACKWATER 9780 26.8 27.4 98 26.9 23.4 115
EVENING STAR 9200 32.1 32.4 99 35.7 28.5 125
MARQUETTE 8760 7.1 -M * 12.7 12.2 104
SYLVAN ROAD 7120 .2 10.7 2 20.0 19.5 103
YOUNTS PEAK 8350 16.1 18.2 88 16.9 18.0 94
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Basin wide percent of average 85 110
POWDER RIVER
BEAR TRAP MEADOW 8200 1.2 3.7 32 10.7 10.0 107
CLOUD PEAK RESERVOIR 9860 14.6 15.8 92 17.5 15.5 113
GRAVE SPRINGS 8550 6.6 11.0 60 12.1 12.0 101
HANSEN SAWMILL 8360 .0 5.6 0 9.9 9.9 100
MIDDLE POWDER 7760 9.9 14.3 69 12.6 14.5 87
POWDER RIVER PASS 9480 9.3 11.7 79 17.4 14.5 120
SOLDIER PARK 8720 5.2 -M * 11.7 -M *
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Basin wide percent of average 67 105
TONGUE RIVER
BIG GOOSE 7990 7.9 12.5 63 16.3 11.5 142
BONE SPRINGS DIV 9350 21.3 17.8 120 17.8 17.0 105
BURGESS JUNCTION 7880 12.2 13.3 92 15.4 14.2 108
DOME LAKE 8880 13.3 13.8 96 17.1 15.5 110
LITTLE GOOSE 8870 7.4 -M * 18.6 -M *
SUCKER CREEK 8880 11.3 13.5 84 17.3 16.0 108
TIE CREEK 6870 .2 5.2 4 15.1 12.2 124
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Basin wide percent of average 87 115
BELLE FOURCHE
COLE CANYON 5910 .1 6.7 1 9.6 8.2 117
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Basin wide percent of average 1 117
CHEYENNE RIVER BASIN
BLIND PARK 6890 .2 6.8 3 11.4 13.0 88
NORTH RAPID CREEK 6130 .1 7.8 1 9.9 10.1 98
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Basin wide percent of average 2 92
UPPER N. PLATTE
ARAPAHO RIDGE 10960 14.0 25.4 55 18.4 29.6 62
BLACKHALL MTN 9820 20.6 -M * 25.4 -M *
COLUMBINE 9160 -M 23.8 * 21.3 28.0 76
DIVIDE PEAK 8880 6.4 20.8 31 20.4 23.1 88
JOE WRIGHT 10120 11.6 24.4 48 21.1 28.3 75
LAPRELE CREEK 8375 .8 9.3 9 13.2 15.0 88
NORTH FRENCH CREEK 10130 17.3 33.6 51 21.8 27.9 78
NEVER SUMMER 10280 11.7 23.2 50 12.5 26.9 46
OLD BATTLE 10000 24.6 35.6 69 29.5 38.1 77
RAWAH 9020 .3 16.3 2 12.8 18.6 69
SAGE CREEK BASIN 7850 -M 12.1 * 11.3 13.4 84
SAND LAKE 10050 24.7 35.9 69 25.7 27.5 93
SOUTH BRUSH CREEK 8440 -M 12.8 * 12.7 18.8 68
TOWER 10500 28.8 50.8 57 33.9 43.0 79
WEBBER SPRINGS 9250 11.7 26.0 45 23.5 29.7 79
WILLOW CREEK PASS 9540 -M 14.1 * 10.5 14.7 71
ZIRKEL 9340 -M 24.5 * 26.2 28.8 91
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Basin wide percent of average 50 77
SWEETWATER
DEER PARK 9700 10.7 17.9 60 19.4 25.2 77
LARSEN CREEK 9000 5.1 -M * 15.4 -M *
SOUTH PASS 9040 12.4 17.9 69 14.6 21.2 69
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Basin wide percent of average 65 73
LOWER N. PLATTE
CASPER MTN. 7900 14.4 17.4 83 19.6 17.7 111
LAPRELE CREEK 8375 .8 9.3 9 13.2 15.0 88
RENO HILL 8400 13.2 16.0 82 20.3 18.4 110
WINDY PEAK 7900 .0 7.1 0 9.7 12.4 78
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Basin wide percent of average 57 99
LARAMIE RIVER
BROOKLYN LAKE 10240 13.9 27.5 51 20.9 25.3 83
CINNABAR PARK 9574 9.7 17.4 56 21.3 22.3 96
CROW CREEK 8330 .1 9.2 1 11.2 11.5 97
DEADMAN HILL 10220 17.0 19.0 89 17.5 19.5 90
RAWAH 9020 .3 16.3 2 12.8 18.6 69
ROACH 9700 10.9 18.5 59 18.2 21.1 86
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Basin wide percent of average 48 86
S. PLATTE
BLACK MOUNTAIN 8920 5.2 -M * 13.5 -M *
CROW CREEK 8330 .1 9.2 1 11.2 11.5 97
DEADMAN HILL 10220 17.0 19.0 89 17.5 19.5 90
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Basin wide percent of average 61 93
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 7.2 0 13.0 17.7 73
DIVIDE PEAK 8880 6.4 20.8 31 20.4 23.1 88
ELK RIVER 8700 -M 18.5 * 16.7 21.9 76
LITTLE SNAKE RIVER 8915 10.1 -M * 26.3 -M *
OLD BATTLE 10000 24.6 35.6 69 29.5 38.1 77
SAGE CREEK BASIN 7850 -M 12.1 * 11.3 13.4 84
SANDSTONE RS 8150 -M 12.4 * 13.1 20.7 63
WHISKEY PARK 8950 14.5 30.6 47 25.9 32.0 81
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Basin wide percent of average 48 78
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.3 15.0 89 15.2 15.0 101
BLIND BULL SUM 8650 24.6 28.7 86 18.1 24.3 74
EAST RIM DIVIDE 7930 2.0 14.0 14 12.2 13.3 92
ELKHART PARK G.S. 9400 13.9 13.9 100 16.3 15.0 109
GROS VENTRE SUMMIT 8750 7.0 14.4 49 11.7 14.5 81
GUNSIGHT PASS 9820 12.0 -M * 15.7 -M *
KENDALL R.S. 7740 7.4 12.6 59 15.3 15.9 96
LOOMIS PARK 8240 7.4 16.3 45 17.4 19.1 91
NEW FORK LAKE 8340 5.9 10.6 56 11.6 12.6 92
POCKET CREEK 9360 10.7 -M * 13.6 -M *
SNIDER BASIN 8060 7.5 14.5 52 13.6 17.9 76
SPRING CREEK DIVIDE 9000 23.4 28.9 81 23.8 29.1 82
TRIPLE PEAK 8500 15.5 25.7 60 26.4 27.4 96
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Basin wide percent of average 66 89
LOWER GREEN RIVER
BLACKS FORK JCT 8870 .0 -M * 12.2 -M *
BUCK PASTURE 9700 .1 -M * 5.3 -M *
EF BLACKS FORK GS 9308 .0 -M * 10.6 -M *
HAMS FORK 7840 .2 8.7 2 10.7 13.9 77
HEWINTA 9519 3.2 11.6 28 14.2 16.8 85
HICKERSON PARK 9145 .0 7.7 0 14.0 9.4 149
HOLE-IN-ROCK 9150 3.0 6.6 45 14.0 8.9 157
INDIAN CREEK 9425 18.0 29.6 61 19.3 28.3 68
KELLEY R.S. 8180 11.0 16.4 67 16.5 22.6 73
SPIRIT LK 10223 8.3 -M * 19.8 -M *
STEEL CREEK PARK 10200 13.1 17.8 74 16.3 19.1 85
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Basin wide percent of average 49 88
UPPER BEAR RIVER
BEAR RIVER RS 8500 .0 -M * 11.3 -M *
BUG LAKE 7950 12.6 20.9 60 17.1 21.4 80
BURTS MILLER RANCH 8000 .4 -M * 9.8 -M *
CHALK CREEK #1 8993 13.8 26.0 53 21.0 28.6 73
HAYDEN FORK 9212 2.7 15.6 17 19.7 23.9 82
KELLEY R.S. 8180 11.0 16.4 67 16.5 22.6 73
LILY LAKE 9156 4.7 13.6 35 13.6 20.0 68
MONTE CRISTO 8960 15.7 30.2 52 21.3 28.7 74
SALT RIVER SUMMIT 7760 5.9 13.4 44 11.6 20.8 56
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Basin wide percent of average 49 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.