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: APRIL 28 , 2010
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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 3.9 13.6 29 14.4 24.0 60
COTTONWOOD CREEK 7670 13.7 21.1 65 23.4 31.4 75
GRAND TARGHEE 9260 41.1 -M * 31.4 -M *
GRANITE CREEK 6770 5.2 14.1 37 13.5 22.1 61
GRASSY LAKE 7265 19.2 34.7 55 28.6 40.3 71
GROS VENTRE SUMMIT 8750 7.7 13.8 56 10.0 15.0 67
GUNSIGHT PASS 9820 9.2 -M * 12.5 -M *
LEWIS LAKE DIVIDE 7850 16.4 35.5 46 23.4 41.1 57
PHILLIPS BENCH 8200 16.3 30.1 54 22.0 32.6 67
SALT RIVER SUMMIT 7760 6.8 11.9 57 13.8 21.3 65
SNAKE RIVER STATION 6920 1.5 13.8 11 18.1 25.2 72
SPRING CREEK DIVIDE 9000 19.1 28.8 66 19.6 29.8 66
THUMB DIVIDE 7980 6.4 16.1 40 14.8 21.6 69
TOGWOTEE PASS 9580 19.4 27.7 70 20.7 28.4 73
TWO OCEAN PLATEAU 9240 23.3 31.7 74 19.9 31.5 63
WILLOW CREEK 8380 18.5 31.4 59 29.7 37.0 80
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Basin wide percent of average 55 68
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 15.1 25.8 59 14.9 23.0 65
BLACK BEAR 8170 25.1 40.5 62 27.7 45.2 61
CANYON 7870 6.4 12.0 53 12.1 17.4 70
FISHER CREEK 9100 22.6 37.8 60 24.7 41.2 60
MADISON PLATEAU 7750 14.2 25.1 57 21.4 30.0 71
NORTHEAST ENTRANCE 7350 .2 8.0 3 9.7 14.5 67
PARKER PEAK 9400 17.6 24.4 72 14.3 19.1 75
SYLVAN LAKE 8420 11.6 24.1 48 19.1 24.2 79
THUMB DIVIDE 7980 6.4 16.1 40 14.8 21.6 69
TWO OCEAN PLATEAU 9240 23.3 31.7 74 19.9 31.5 63
WHISKEY CREEK 6800 8.3 16.1 52 13.3 23.8 56
WHITE MILL 8700 15.9 26.4 60 17.1 30.6 56
WOLVERINE 7650 .6 8.1 7 8.2 14.9 55
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Basin wide percent of average 57 64
WIND RIVER
BURROUGHS CREEK 8750 -M 14.3 * -M 18.9 *
COLD SPRINGS 9630 6.5 4.9 133 12.5 13.4 93
DEER PARK 9700 17.8 19.5 91 22.5 26.3 86
HOBBS PARK 10100 19.4 18.0 108 20.6 16.3 126
LITTLE WARM 9370 7.5 11.7 64 10.7 16.3 66
SOUTH PASS 9040 15.2 18.2 84 20.0 22.1 90
ST. LAWRENCE ALT 8620 6.7 6.5 103 13.8 11.6 119
TOGWOTEE PASS 9580 19.4 27.7 70 20.7 28.4 73
TOWNSEND CREEK 8700 11.5 9.7 119 18.0 15.0 120
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Basin wide percent of average 90 93
BIGHORN BASIN
BALD MTN. 9380 13.6 23.3 58 12.2 20.7 59
BEAR TRAP MEADOW 8200 3.8 2.9 131 9.8 10.5 93
BLACKWATER 9780 18.8 28.3 66 18.2 24.2 75
BONE SPRINGS DIV 9350 10.3 18.2 57 11.6 17.8 65
EVENING STAR 9200 17.6 32.9 53 22.4 29.3 76
GRAVE SPRINGS 8550 7.9 11.1 71 11.7 12.7 92
KIRWIN 9550 10.1 12.9 78 11.8 13.8 86
MARQUETTE 8760 8.0 11.1 72 11.3 13.1 86
MIDDLE POWDER 7760 10.0 14.6 68 10.3 15.3 67
OWL CREEK 8975 1.9 4.1 46 7.1 7.9 90
POWDER RIVER PASS 9480 6.9 11.1 62 12.2 15.3 80
SHELL CREEK 9580 11.7 16.7 70 11.2 16.3 69
SYLVAN LAKE 8420 11.6 24.1 48 19.1 24.2 79
SYLVAN ROAD 7120 .1 9.2 1 13.4 20.1 67
TIMBER CREEK 7950 2.5 5.1 49 8.0 10.0 80
YOUNTS PEAK 8350 10.6 18.2 58 10.9 18.5 59
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Basin wide percent of average 60 75
SHOSHONE RIVER
BLACKWATER 9780 18.8 28.3 66 18.2 24.2 75
EVENING STAR 9200 17.6 32.9 53 22.4 29.3 76
KIRWIN 9550 10.1 12.9 78 11.8 13.8 86
MARQUETTE 8760 8.0 11.1 72 11.3 13.1 86
SYLVAN LAKE 8420 11.6 24.1 48 19.1 24.2 79
SYLVAN ROAD 7120 .1 9.2 1 13.4 20.1 67
YOUNTS PEAK 8350 10.6 18.2 58 10.9 18.5 59
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Basin wide percent of average 56 75
POWDER-TONGUE
BEAR TRAP MEADOW 8200 3.8 2.9 131 9.8 10.5 93
BIG GOOSE 7990 8.3 12.1 69 12.2 12.4 98
BONE SPRINGS DIV 9350 10.3 18.2 57 11.6 17.8 65
BURGESS JUNCTION 7880 10.3 13.5 76 12.3 15.0 82
CLOUD PEAK RESERVOIR 9860 12.7 16.3 78 13.2 16.5 80
DOME LAKE 8880 7.8 13.8 57 13.2 16.3 81
GRAVE SPRINGS 8550 7.9 11.1 71 11.7 12.7 92
HANSEN SAWMILL 8360 3.0 5.2 58 9.1 10.6 86
MIDDLE POWDER 7760 10.0 14.6 68 10.3 15.3 67
POWDER RIVER PASS 9480 6.9 11.1 62 12.2 15.3 80
SUCKER CREEK 8880 11.3 13.5 84 15.2 16.8 90
TIE CREEK 6870 .1 4.8 2 11.3 13.0 87
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Basin wide percent of average 67 83
BELLE FOURCHE
BLIND PARK 6890 .5 5.2 10 13.3 13.7 97
COLE CANYON 5910 .0 5.8 0 11.7 9.0 130
NORTH RAPID CREEK 6130 .2 5.6 4 12.9 10.9 118
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Basin wide percent of average 4 113
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.7 22.3 75 25.1 28.7 87
DIVIDE PEAK 8880 19.7 20.2 98 26.5 23.8 111
ELK RIVER 8700 13.5 16.6 81 22.5 22.6 100
JOE WRIGHT 10120 21.7 24.9 87 25.7 29.4 87
NORTH FRENCH CREEK 10130 -M 34.3 * -M 28.9 *
OLD BATTLE 10000 37.5 36.4 103 39.9 39.2 102
SAGE CREEK BASIN 7850 9.8 11.7 84 14.4 13.8 104
SOUTH BRUSH CREEK 8440 10.8 11.9 91 21.2 19.6 108
TOWER 10500 37.5 51.8 72 36.3 44.3 82
WEBBER SPRINGS 9250 22.0 25.8 85 31.0 30.6 101
WILLOW CREEK PASS 9540 11.2 14.3 78 14.1 15.3 92
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Basin wide percent of average 85 96
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.9 28.2 81 25.4 26.3 97
CASPER MTN. 7900 15.5 17.5 89 17.5 18.8 93
DEADMAN HILL 10220 26.9 19.5 138 23.1 20.4 113
DEER PARK 9700 17.8 19.5 91 22.5 26.3 86
LAPRELE CREEK 8375 7.6 8.1 94 16.1 15.9 101
RENO HILL 8400 17.3 15.5 112 22.7 19.5 116
ROACH 9700 19.8 18.7 106 25.3 21.9 116
SAND LAKE 10050 34.3 36.7 93 35.1 28.6 123
SOUTH PASS 9040 15.2 18.2 84 20.0 22.1 90
WINDY PEAK 7900 8.9 5.9 151 15.4 13.1 118
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Basin wide percent of average 99 105
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.0 5.7 35 16.6 18.2 91
DIVIDE PEAK 8880 19.7 20.2 98 26.5 23.8 111
OLD BATTLE 10000 37.5 36.4 103 39.9 39.2 102
SANDSTONE RS 8150 8.1 10.8 75 19.2 21.4 90
WHISKEY PARK 8950 24.9 30.7 81 33.5 33.1 101
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Basin wide percent of average 89 100
UPPER GREEN RIVER
BIG SANDY OPENING 9080 9.1 14.3 64 11.5 15.5 74
BLIND BULL SUM 8650 18.2 28.3 64 14.0 24.8 56
EAST RIM DIVIDE 7930 .6 13.7 4 8.1 13.6 60
ELKHART PARK G.S. 9400 7.3 13.4 54 10.4 15.6 67
GROS VENTRE SUMMIT 8750 7.7 13.8 56 10.0 15.0 67
GUNSIGHT PASS 9820 9.2 -M * 12.5 -M *
KENDALL R.S. 7740 .3 11.2 3 9.4 16.3 58
LOOMIS PARK 8240 4.4 15.2 29 11.5 19.6 59
NEW FORK LAKE 8340 1.9 9.4 20 7.6 13.1 58
POCKET CREEK 9360 8.1 -M * 13.2 -M *
SNIDER BASIN 8060 6.5 13.5 48 12.2 18.3 67
SPRING CREEK DIVIDE 9000 19.1 28.8 66 19.6 29.8 66
TRIPLE PEAK 8500 13.6 24.8 55 21.4 28.2 76
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Basin wide percent of average 48 65
LOWER GREEN RIVER
HAMS FORK 7840 2.2 7.1 31 11.1 14.4 77
HEWINTA 9519 5.8 10.3 56 13.9 17.4 80
HICKERSON PARK 9145 4.8 6.6 73 12.7 9.9 128
HOLE-IN-ROCK 9150 2.5 5.6 45 12.0 9.4 128
INDIAN CREEK 9425 17.4 29.0 60 18.9 29.0 65
KELLEY R.S. 8180 8.3 15.2 55 15.4 23.2 66
STEEL CREEK PARK 10200 16.4 18.3 90 17.6 19.8 89
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Basin wide percent of average 62 83
UPPER BEAR RIVER
BUG LAKE 7950 10.3 19.4 53 16.1 22.0 73
HAYDEN FORK 9212 5.8 14.2 41 19.6 24.6 80
KELLEY R.S. 8180 8.3 15.2 55 15.4 23.2 66
LILY LAKE 9156 9.0 12.3 73 16.0 20.7 77
MONTE CRISTO 8960 14.9 29.2 51 20.3 29.7 68
SALT RIVER SUMMIT 7760 6.8 11.9 57 13.8 21.3 65
TRIAL LAKE 9992 17.2 26.6 65 17.1 28.9 59
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Basin wide percent of average 56 69
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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.