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 THURSDAY: APRIL 29 , 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 3.8 13.3 29 14.7 24.1 61
COTTONWOOD CREEK 7670 14.4 20.7 70 24.5 31.5 78
GRAND TARGHEE 9260 41.8 -M * 32.0 -M *
GRANITE CREEK 6770 4.9 13.8 36 13.9 22.1 63
GRASSY LAKE 7265 19.1 34.4 56 28.8 40.5 71
GROS VENTRE SUMMIT 8750 8.0 13.7 58 10.3 15.0 69
GUNSIGHT PASS 9820 9.8 -M * 12.9 -M *
LEWIS LAKE DIVIDE 7850 16.6 35.3 47 24.1 41.2 58
PHILLIPS BENCH 8200 16.9 30.0 56 22.4 32.7 69
SALT RIVER SUMMIT 7760 6.8 11.6 59 14.1 21.4 66
SNAKE RIVER STATION 6920 1.6 13.4 12 18.4 25.2 73
SPRING CREEK DIVIDE 9000 19.6 28.8 68 20.1 29.9 67
THUMB DIVIDE 7980 6.9 15.9 43 15.4 21.7 71
TOGWOTEE PASS 9580 20.0 27.8 72 20.6 28.6 72
TWO OCEAN PLATEAU 9240 23.7 31.7 75 20.2 31.7 64
WILLOW CREEK 8380 19.2 31.2 62 31.0 37.1 84
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Basin wide percent of average 56 69
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 15.5 25.9 60 15.0 23.2 65
BLACK BEAR 8170 26.7 40.5 66 28.9 45.4 64
CANYON 7870 6.9 11.9 58 12.9 17.5 74
FISHER CREEK 9100 23.4 37.8 62 25.3 41.4 61
MADISON PLATEAU 7750 15.8 24.9 63 22.9 30.1 76
NORTHEAST ENTRANCE 7350 .2 7.8 3 9.8 14.6 67
PARKER PEAK 9400 18.1 24.4 74 14.5 19.2 76
SYLVAN LAKE 8420 11.9 24.0 50 19.7 24.3 81
THUMB DIVIDE 7980 6.9 15.9 43 15.4 21.7 71
TWO OCEAN PLATEAU 9240 23.7 31.7 75 20.2 31.7 64
WHISKEY CREEK 6800 8.9 15.9 56 14.8 23.9 62
WHITE MILL 8700 16.4 26.4 62 17.4 30.8 56
WOLVERINE 7650 .7 7.8 9 8.5 14.9 57
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Basin wide percent of average 59 67
WIND RIVER
BURROUGHS CREEK 8750 -M 14.1 * -M 19.0 *
COLD SPRINGS 9630 6.6 4.8 138 12.7 13.6 93
DEER PARK 9700 17.8 19.1 93 22.5 26.5 85
HOBBS PARK 10100 19.5 18.0 108 20.6 16.5 125
LITTLE WARM 9370 8.0 11.5 70 11.2 16.4 68
SOUTH PASS 9040 15.2 18.2 84 20.0 22.3 90
ST. LAWRENCE ALT 8620 6.5 6.4 102 13.8 11.7 118
TOGWOTEE PASS 9580 20.0 27.8 72 20.6 28.6 72
TOWNSEND CREEK 8700 11.3 9.6 118 18.1 15.1 120
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Basin wide percent of average 91 93
BIGHORN BASIN
BALD MTN. 9380 14.1 23.4 60 12.1 20.9 58
BEAR TRAP MEADOW 8200 3.7 2.8 132 9.9 10.6 93
BLACKWATER 9780 19.4 28.4 68 18.4 24.3 76
BONE SPRINGS DIV 9350 10.9 18.2 60 11.7 17.9 65
EVENING STAR 9200 18.0 33.0 55 22.9 29.5 78
GRAVE SPRINGS 8550 7.8 11.0 71 11.7 12.8 91
KIRWIN 9550 10.4 13.0 80 12.2 13.9 88
MARQUETTE 8760 7.7 11.1 69 11.6 13.3 87
MIDDLE POWDER 7760 10.2 14.6 70 10.1 15.4 66
OWL CREEK 8975 1.2 4.0 30 7.1 7.9 90
POWDER RIVER PASS 9480 7.3 11.1 66 12.1 15.4 79
SHELL CREEK 9580 12.3 16.8 73 12.0 16.4 73
SYLVAN LAKE 8420 11.9 24.0 50 19.7 24.3 81
SYLVAN ROAD 7120 .4 8.9 4 14.0 20.2 69
TIMBER CREEK 7950 2.1 4.9 43 8.2 10.1 81
YOUNTS PEAK 8350 10.6 18.2 58 11.1 18.5 60
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Basin wide percent of average 61 75
SHOSHONE RIVER
BLACKWATER 9780 19.4 28.4 68 18.4 24.3 76
EVENING STAR 9200 18.0 33.0 55 22.9 29.5 78
KIRWIN 9550 10.4 13.0 80 12.2 13.9 88
MARQUETTE 8760 7.7 11.1 69 11.6 13.3 87
SYLVAN LAKE 8420 11.9 24.0 50 19.7 24.3 81
SYLVAN ROAD 7120 .4 8.9 4 14.0 20.2 69
YOUNTS PEAK 8350 10.6 18.2 58 11.1 18.5 60
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Basin wide percent of average 57 76
POWDER-TONGUE
BEAR TRAP MEADOW 8200 3.7 2.8 132 9.9 10.6 93
BIG GOOSE 7990 8.2 12.0 68 12.0 12.5 96
BONE SPRINGS DIV 9350 10.9 18.2 60 11.7 17.9 65
BURGESS JUNCTION 7880 10.4 13.4 78 12.0 15.1 79
CLOUD PEAK RESERVOIR 9860 12.7 16.3 78 12.8 16.6 77
DOME LAKE 8880 8.0 13.8 58 13.4 16.4 82
GRAVE SPRINGS 8550 7.8 11.0 71 11.7 12.8 91
HANSEN SAWMILL 8360 2.7 5.1 53 8.9 10.7 83
MIDDLE POWDER 7760 10.2 14.6 70 10.1 15.4 66
POWDER RIVER PASS 9480 7.3 11.1 66 12.1 15.4 79
SUCKER CREEK 8880 11.4 13.4 85 15.1 17.0 89
TIE CREEK 6870 .0 4.5 0 11.3 13.1 86
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Basin wide percent of average 69 81
BELLE FOURCHE
BLIND PARK 6890 .3 4.8 6 13.2 13.8 96
COLE CANYON 5910 .0 5.6 0 11.7 9.1 129
NORTH RAPID CREEK 6130 .1 5.1 2 12.8 11.0 116
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Basin wide percent of average 3 111
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.4 22.0 75 24.8 28.8 86
DIVIDE PEAK 8880 20.1 20.0 101 27.0 23.9 113
ELK RIVER 8700 13.7 16.2 85 22.7 22.7 100
JOE WRIGHT 10120 21.9 25.0 88 25.9 29.5 88
NORTH FRENCH CREEK 10130 38.6 34.3 113 38.7 29.1 133
OLD BATTLE 10000 37.9 36.5 104 40.2 39.4 102
SAGE CREEK BASIN 7850 9.8 11.6 84 14.8 13.9 106
SOUTH BRUSH CREEK 8440 11.4 11.7 97 21.7 19.7 110
TOWER 10500 37.6 51.9 72 36.3 44.5 82
WEBBER SPRINGS 9250 22.4 25.6 88 31.5 30.7 103
WILLOW CREEK PASS 9540 11.6 14.3 81 14.3 15.4 93
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Basin wide percent of average 90 100
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.1 28.3 82 25.6 26.5 97
CASPER MTN. 7900 15.6 17.5 89 17.6 19.0 93
DEADMAN HILL 10220 27.2 19.5 139 23.3 20.5 114
DEER PARK 9700 17.8 19.1 93 22.5 26.5 85
LAPRELE CREEK 8375 7.4 7.8 95 16.0 16.0 100
RENO HILL 8400 17.1 15.3 112 22.5 19.7 114
ROACH 9700 19.9 18.7 106 25.3 22.0 115
SAND LAKE 10050 34.9 36.8 95 35.5 28.8 123
SOUTH PASS 9040 15.2 18.2 84 20.0 22.3 90
WINDY PEAK 7900 8.6 5.7 151 15.3 13.2 116
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Basin wide percent of average 100 104
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 2.3 5.4 43 17.0 18.3 93
DIVIDE PEAK 8880 20.1 20.0 101 27.0 23.9 113
OLD BATTLE 10000 37.9 36.5 104 40.2 39.4 102
SANDSTONE RS 8150 8.3 10.5 79 19.8 21.6 92
WHISKEY PARK 8950 25.0 30.7 81 33.9 33.3 102
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Basin wide percent of average 91 101
UPPER GREEN RIVER
BIG SANDY OPENING 9080 8.6 14.1 61 11.4 15.6 73
BLIND BULL SUM 8650 19.0 28.2 67 14.5 24.9 58
EAST RIM DIVIDE 7930 .8 13.6 6 8.4 13.7 61
ELKHART PARK G.S. 9400 7.3 13.3 55 10.5 15.7 67
GROS VENTRE SUMMIT 8750 8.0 13.7 58 10.3 15.0 69
GUNSIGHT PASS 9820 9.8 -M * 12.9 -M *
KENDALL R.S. 7740 .2 10.9 2 9.7 16.4 59
LOOMIS PARK 8240 4.8 15.0 32 12.1 19.7 61
NEW FORK LAKE 8340 2.0 9.2 22 7.3 13.2 55
POCKET CREEK 9360 7.8 -M * 13.2 -M *
SNIDER BASIN 8060 6.5 13.3 49 12.4 18.3 68
SPRING CREEK DIVIDE 9000 19.6 28.8 68 20.1 29.9 67
TRIPLE PEAK 8500 14.3 24.5 58 22.3 28.3 79
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Basin wide percent of average 49 66
LOWER GREEN RIVER
HAMS FORK 7840 2.3 6.9 33 11.2 14.5 77
HEWINTA 9519 6.1 10.1 60 14.3 17.5 82
HICKERSON PARK 9145 5.1 6.4 80 12.9 10.0 129
HOLE-IN-ROCK 9150 2.5 5.4 46 12.2 9.5 128
INDIAN CREEK 9425 17.7 28.9 61 18.9 29.1 65
KELLEY R.S. 8180 8.4 14.9 56 15.3 23.3 66
STEEL CREEK PARK 10200 16.7 18.4 91 18.0 19.9 90
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Basin wide percent of average 65 83
UPPER BEAR RIVER
BUG LAKE 7950 10.6 19.1 55 16.4 22.1 74
HAYDEN FORK 9212 6.6 13.9 47 20.2 24.8 81
KELLEY R.S. 8180 8.4 14.9 56 15.3 23.3 66
LILY LAKE 9156 9.5 12.0 79 16.4 20.8 79
MONTE CRISTO 8960 15.6 29.0 54 20.5 29.8 69
SALT RIVER SUMMIT 7760 6.8 11.6 59 14.1 21.4 66
TRIAL LAKE 9992 -M 26.6 * -M 29.0 *
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Basin wide percent of average 57 72
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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.