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 SUNDAY: MARCH 29 , 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 14.7 18.1 81 18.3 21.3 86
COTTONWOOD CREEK 7670 25.5 23.8 107 28.8 27.1 106
GRAND TARGHEE 9260 40.6 -M * 32.0 -M *
GRANITE CREEK 6770 15.7 18.7 84 19.8 19.8 100
GRASSY LAKE 7265 30.9 35.5 87 33.3 35.8 93
GROS VENTRE SUMMIT 8750 11.1 14.1 79 14.9 12.8 116
GUNSIGHT PASS 9820 14.2 -M * 15.0 -M *
LEWIS LAKE DIVIDE 7850 -M 35.3 * -M 36.5 *
PHILLIPS BENCH 8200 26.1 28.7 91 27.7 28.8 96
SALT RIVER SUMMIT 7760 14.0 14.4 97 15.3 18.6 82
SNAKE RIVER STATION 6920 16.3 19.1 85 21.2 22.1 96
SPRING CREEK DIVIDE 9000 25.7 26.4 97 24.9 26.2 95
THUMB DIVIDE 7980 18.4 19.0 97 19.3 18.7 103
TOGWOTEE PASS 9580 26.1 24.6 106 28.1 24.3 116
TWO OCEAN PLATEAU 9240 36.8 27.7 133 28.4 27.5 103
WILLOW CREEK 8380 32.5 30.1 108 37.1 31.9 116
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Basin wide percent of average 98 101
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.7 23.2 98 20.5 19.9 103
BLACK BEAR 8170 34.5 39.0 88 33.9 40.0 85
CANYON 7870 12.9 13.7 94 14.2 15.3 93
FISHER CREEK 9100 35.6 34.7 103 -M 36.0 *
MADISON PLATEAU 7750 21.1 25.0 84 22.7 26.4 86
NORTHEAST ENTRANCE 7350 10.8 11.3 96 13.1 12.5 105
PARKER PEAK 9400 25.5 21.5 119 -M 16.0 *
SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104
THUMB DIVIDE 7980 18.4 19.0 97 19.3 18.7 103
TWO OCEAN PLATEAU 9240 36.8 27.7 133 28.4 27.5 103
WHISKEY CREEK 6800 15.2 17.1 89 18.6 20.8 89
WHITE MILL 8700 23.8 24.1 99 22.6 26.7 85
WOLVERINE 7650 11.5 11.5 100 11.7 12.7 92
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Basin wide percent of average 99 94
WIND RIVER
BURROUGHS CREEK 8750 15.1 14.6 103 15.5 16.0 97
COLD SPRINGS 9630 7.5 8.7 86 9.9 10.3 96
DEER PARK 9700 10.1 16.6 61 14.9 21.5 69
HOBBS PARK 10100 11.6 14.6 79 11.7 12.4 94
LITTLE WARM 9370 11.7 11.7 100 14.2 13.1 108
SOUTH PASS 9040 11.2 16.4 68 13.0 18.1 72
ST. LAWRENCE ALT 8620 5.1 7.1 72 8.2 8.6 95
TOGWOTEE PASS 9580 26.1 24.6 106 28.1 24.3 116
TOWNSEND CREEK 8700 7.7 8.5 91 10.1 11.2 90
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Basin wide percent of average 86 93
BIGHORN BASIN
BALD MTN. 9380 17.4 19.3 90 14.0 17.0 82
BEAR TRAP MEADOW 8200 8.8 5.2 169 9.3 8.0 116
BLACKWATER 9780 24.0 24.3 99 21.7 20.2 107
BONE SPRINGS DIV 9350 16.9 15.9 106 13.6 14.2 96
EVENING STAR 9200 29.5 29.5 100 29.9 25.0 120
GRAVE SPRINGS 8550 9.1 9.1 100 9.8 9.4 104
KIRWIN 9550 11.8 11.1 106 13.1 11.0 119
MARQUETTE 8760 5.2 8.7 60 7.5 9.4 80
MIDDLE POWDER 7760 10.8 11.4 95 9.5 12.0 79
OWL CREEK 8975 5.2 5.4 96 5.0 5.6 89
POWDER RIVER PASS 9480 12.0 10.6 113 13.9 12.0 116
SHELL CREEK 9580 16.1 14.4 112 15.1 13.0 116
SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104
SYLVAN ROAD 7120 13.3 12.7 105 18.1 17.5 103
TIMBER CREEK 7950 3.9 5.5 71 7.3 7.1 103
YOUNTS PEAK 8350 17.8 17.0 105 15.2 15.9 96
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Basin wide percent of average 100 103
SHOSHONE RIVER
BLACKWATER 9780 24.0 24.3 99 21.7 20.2 107
EVENING STAR 9200 29.5 29.5 100 29.9 25.0 120
KIRWIN 9550 11.8 11.1 106 13.1 11.0 119
MARQUETTE 8760 5.2 8.7 60 7.5 9.4 80
SYLVAN LAKE 8420 19.6 22.4 88 21.6 20.7 104
SYLVAN ROAD 7120 13.3 12.7 105 18.1 17.5 103
YOUNTS PEAK 8350 17.8 17.0 105 15.2 15.9 96
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Basin wide percent of average 96 106
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.8 5.2 169 9.3 8.0 116
BIG GOOSE 7990 8.5 10.1 84 10.6 8.2 129
BONE SPRINGS DIV 9350 16.9 15.9 106 13.6 14.2 96
BURGESS JUNCTION 7880 11.2 11.4 98 11.5 11.8 97
CLOUD PEAK RESERVOIR 9860 16.2 12.9 126 15.3 12.4 123
DOME LAKE 8880 11.7 12.0 98 13.9 12.7 109
GRAVE SPRINGS 8550 9.1 9.1 100 9.8 9.4 104
HANSEN SAWMILL 8360 6.3 6.3 100 9.3 7.9 118
MIDDLE POWDER 7760 10.8 11.4 95 9.5 12.0 79
POWDER RIVER PASS 9480 12.0 10.6 113 13.9 12.0 116
SUCKER CREEK 8880 12.7 11.5 110 15.0 13.1 115
TIE CREEK 6870 4.3 5.7 75 12.0 9.6 125
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Basin wide percent of average 105 109
BELLE FOURCHE
BLIND PARK 6890 6.9 8.5 81 14.2 10.9 130
COLE CANYON 5910 6.7 6.7 100 11.7 6.5 180
NORTH RAPID CREEK 6130 9.2 8.1 114 12.9 8.4 154
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Basin wide percent of average 98 150
UPPER N. PLATTE RIVER
COLUMBINE 9160 25.8 24.9 104 25.7 24.8 104
DIVIDE PEAK 8880 22.6 19.5 116 24.2 20.4 119
ELK RIVER 8700 20.9 19.2 109 20.8 19.2 108
JOE WRIGHT 10120 23.0 20.9 110 27.1 24.2 112
NORTH FRENCH CREEK 10130 33.6 28.6 117 30.8 24.2 127
OLD BATTLE 10000 31.9 31.7 101 36.3 34.1 106
SAGE CREEK BASIN 7850 11.1 11.3 98 13.5 11.8 114
SOUTH BRUSH CREEK 8440 12.3 12.9 95 16.3 16.0 102
TOWER 10500 42.3 44.7 95 40.5 37.8 107
WEBBER SPRINGS 9250 24.2 26.1 93 27.3 26.2 104
WILLOW CREEK PASS 9540 11.7 11.7 100 11.7 12.5 94
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Basin wide percent of average 103 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.4 23.2 97 20.7 21.5 96
CASPER MTN. 7900 11.9 14.0 85 13.0 13.9 94
DEADMAN HILL 10220 15.6 15.9 98 16.0 16.5 97
DEER PARK 9700 10.1 16.6 61 14.9 21.5 69
LAPRELE CREEK 8375 9.4 10.8 87 11.1 12.3 90
RENO HILL 8400 13.4 13.7 98 14.4 14.4 100
ROACH 9700 14.3 16.7 86 16.6 18.2 91
SAND LAKE 10050 28.8 31.9 90 27.0 23.5 115
SOUTH PASS 9040 11.2 16.4 68 13.0 18.1 72
WINDY PEAK 7900 8.7 7.9 110 9.5 10.3 92
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Basin wide percent of average 87 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 15.5 11.4 136 17.4 15.5 112
DIVIDE PEAK 8880 22.6 19.5 116 24.2 20.4 119
OLD BATTLE 10000 31.9 31.7 101 36.3 34.1 106
SANDSTONE RS 8150 17.0 15.0 113 19.4 18.5 105
WHISKEY PARK 8950 31.6 29.9 106 31.8 28.2 113
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Basin wide percent of average 110 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 11.8 14.4 82 11.7 13.2 89
BLIND BULL SUM 8650 25.3 27.8 91 18.9 22.0 86
EAST RIM DIVIDE 7930 9.2 13.0 71 11.5 12.0 96
ELKHART PARK G.S. 9400 12.1 13.3 91 13.2 13.1 101
GROS VENTRE SUMMIT 8750 11.1 14.1 79 14.9 12.8 116
GUNSIGHT PASS 9820 14.2 -M * 15.0 -M *
KENDALL R.S. 7740 10.9 14.6 75 13.2 14.5 91
LOOMIS PARK 8240 15.4 17.3 89 17.5 17.3 101
NEW FORK LAKE 8340 11.3 11.1 102 10.2 11.2 91
SNIDER BASIN 8060 13.5 14.5 93 14.0 16.0 88
SPRING CREEK DIVIDE 9000 25.7 26.4 97 24.9 26.2 95
TRIPLE PEAK 8500 23.8 24.8 96 25.2 24.5 103
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Basin wide percent of average 89 96
LOWER GREEN RIVER
HAMS FORK 7840 10.3 12.3 84 11.0 12.1 91
HEWINTA 9519 8.0 11.7 68 12.3 14.3 86
HICKERSON PARK 9145 3.4 7.3 47 7.2 7.7 94
HOLE-IN-ROCK 9150 4.3 7.0 61 7.1 7.2 99
INDIAN CREEK 9425 22.9 27.6 83 20.6 25.1 82
KELLEY R.S. 8180 15.2 16.8 90 16.8 20.1 84
STEEL CREEK PARK 10200 11.5 15.5 74 14.8 15.8 94
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Basin wide percent of average 77 88
UPPER BEAR RIVER
BUG LAKE 7950 17.7 20.8 85 16.9 19.0 89
HAYDEN FORK 9212 14.4 16.2 89 19.7 20.6 96
KELLEY R.S. 8180 15.2 16.8 90 16.8 20.1 84
LILY LAKE 9156 13.1 12.9 102 15.2 17.2 88
MONTE CRISTO 8960 25.1 29.7 85 24.8 25.2 98
SALT RIVER SUMMIT 7760 14.0 14.4 97 15.3 18.6 82
TRIAL LAKE 9992 22.3 24.8 90 20.8 24.6 85
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Basin wide percent of average 90 89
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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.