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 MONDAY: MARCH 30 , 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 15.1 18.1 83 18.8 21.4 88
COTTONWOOD CREEK 7670 25.9 23.9 108 29.3 27.3 107
GRAND TARGHEE 9260 41.1 -M * 32.3 -M *
GRANITE CREEK 6770 16.1 18.7 86 20.3 19.9 102
GRASSY LAKE 7265 31.4 35.7 88 33.6 35.9 94
GROS VENTRE SUMMIT 8750 11.5 14.2 81 15.4 12.8 120
GUNSIGHT PASS 9820 14.7 -M * 15.5 -M *
LEWIS LAKE DIVIDE 7850 -M 35.4 * -M 36.7 *
PHILLIPS BENCH 8200 26.8 28.8 93 28.2 29.0 97
SALT RIVER SUMMIT 7760 14.2 14.4 99 15.5 18.7 83
SNAKE RIVER STATION 6920 16.5 19.2 86 21.6 22.2 97
SPRING CREEK DIVIDE 9000 26.4 26.5 100 25.6 26.3 97
THUMB DIVIDE 7980 18.7 19.0 98 19.6 18.8 104
TOGWOTEE PASS 9580 26.6 24.8 107 28.8 24.5 118
TWO OCEAN PLATEAU 9240 37.2 27.9 133 29.0 27.6 105
WILLOW CREEK 8380 33.3 30.2 110 37.7 32.0 118
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Basin wide percent of average 99 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 22.9 23.3 98 21.0 20.0 105
BLACK BEAR 8170 35.4 39.2 90 34.5 40.3 86
CANYON 7870 13.2 13.7 96 14.5 15.4 94
FISHER CREEK 9100 36.4 34.9 104 -M 36.2 *
MADISON PLATEAU 7750 21.4 25.1 85 23.2 26.6 87
NORTHEAST ENTRANCE 7350 10.8 11.3 96 13.4 12.6 106
PARKER PEAK 9400 25.8 21.6 119 -M 16.1 *
SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106
THUMB DIVIDE 7980 18.7 19.0 98 19.6 18.8 104
TWO OCEAN PLATEAU 9240 37.2 27.9 133 29.0 27.6 105
WHISKEY CREEK 6800 15.9 17.2 92 19.4 20.9 93
WHITE MILL 8700 24.4 24.2 101 22.8 26.9 85
WOLVERINE 7650 11.6 11.5 101 11.8 12.7 93
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Basin wide percent of average 101 95
WIND RIVER
BURROUGHS CREEK 8750 15.4 14.6 105 16.0 16.1 99
COLD SPRINGS 9630 7.6 8.8 86 10.1 10.4 97
DEER PARK 9700 10.3 16.8 61 15.1 21.6 70
HOBBS PARK 10100 12.2 14.7 83 12.2 12.5 98
LITTLE WARM 9370 11.9 11.8 101 14.6 13.2 111
SOUTH PASS 9040 11.3 16.6 68 13.3 18.2 73
ST. LAWRENCE ALT 8620 5.3 7.2 74 8.7 8.7 100
TOGWOTEE PASS 9580 26.6 24.8 107 28.8 24.5 118
TOWNSEND CREEK 8700 7.8 8.6 91 10.2 11.4 89
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Basin wide percent of average 87 94
BIGHORN BASIN
BALD MTN. 9380 18.3 19.5 94 14.4 17.1 84
BEAR TRAP MEADOW 8200 9.1 5.2 175 9.5 8.0 119
BLACKWATER 9780 24.6 24.4 101 22.2 20.4 109
BONE SPRINGS DIV 9350 17.4 16.0 109 13.9 14.4 97
EVENING STAR 9200 29.3 29.7 99 30.4 25.1 121
GRAVE SPRINGS 8550 9.1 9.2 99 9.9 9.5 104
KIRWIN 9550 12.5 11.2 112 13.7 11.1 123
MARQUETTE 8760 5.8 8.8 66 7.7 9.5 81
MIDDLE POWDER 7760 11.1 11.5 97 9.8 12.1 81
OWL CREEK 8975 5.2 5.5 95 5.4 5.7 95
POWDER RIVER PASS 9480 12.5 10.7 117 14.5 12.1 120
SHELL CREEK 9580 16.6 14.5 114 15.8 13.1 121
SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106
SYLVAN ROAD 7120 13.7 12.9 106 18.5 17.6 105
TIMBER CREEK 7950 4.4 5.7 77 8.0 7.2 111
YOUNTS PEAK 8350 17.7 17.1 104 15.2 16.0 95
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Basin wide percent of average 101 105
SHOSHONE RIVER
BLACKWATER 9780 24.6 24.4 101 22.2 20.4 109
EVENING STAR 9200 29.3 29.7 99 30.4 25.1 121
KIRWIN 9550 12.5 11.2 112 13.7 11.1 123
MARQUETTE 8760 5.8 8.8 66 7.7 9.5 81
SYLVAN LAKE 8420 19.8 22.5 88 22.0 20.8 106
SYLVAN ROAD 7120 13.7 12.9 106 18.5 17.6 105
YOUNTS PEAK 8350 17.7 17.1 104 15.2 16.0 95
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Basin wide percent of average 97 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.1 5.2 175 9.5 8.0 119
BIG GOOSE 7990 9.2 10.3 89 11.5 8.3 139
BONE SPRINGS DIV 9350 17.4 16.0 109 13.9 14.4 97
BURGESS JUNCTION 7880 11.7 11.5 102 12.0 11.9 101
CLOUD PEAK RESERVOIR 9860 16.9 13.0 130 15.6 12.5 125
DOME LAKE 8880 12.5 12.1 103 14.7 12.8 115
GRAVE SPRINGS 8550 9.1 9.2 99 9.9 9.5 104
HANSEN SAWMILL 8360 6.7 6.3 106 9.7 8.0 121
MIDDLE POWDER 7760 11.1 11.5 97 9.8 12.1 81
POWDER RIVER PASS 9480 12.5 10.7 117 14.5 12.1 120
SUCKER CREEK 8880 13.6 11.6 117 15.7 13.2 119
TIE CREEK 6870 4.9 5.7 86 12.6 9.6 131
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Basin wide percent of average 109 113
BELLE FOURCHE
BLIND PARK 6890 7.0 8.6 81 14.5 10.9 133
COLE CANYON 5910 6.6 6.7 99 11.7 6.6 177
NORTH RAPID CREEK 6130 9.2 8.1 114 13.4 8.5 158
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Basin wide percent of average 97 152
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.0 24.9 104 26.1 24.9 105
DIVIDE PEAK 8880 23.0 19.7 117 24.5 20.5 120
ELK RIVER 8700 21.5 19.3 111 21.0 19.3 109
JOE WRIGHT 10120 23.2 21.0 110 27.2 24.4 111
NORTH FRENCH CREEK 10130 34.1 28.8 118 31.0 24.3 128
OLD BATTLE 10000 32.0 31.9 100 36.3 34.2 106
SAGE CREEK BASIN 7850 11.3 11.4 99 13.8 11.9 116
SOUTH BRUSH CREEK 8440 12.8 13.0 98 16.8 16.1 104
TOWER 10500 42.7 45.0 95 40.8 38.0 107
WEBBER SPRINGS 9250 24.4 26.2 93 27.6 26.4 105
WILLOW CREEK PASS 9540 12.0 11.8 102 11.9 12.6 94
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Basin wide percent of average 104 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.5 23.4 96 20.9 21.7 96
CASPER MTN. 7900 11.7 14.2 82 12.9 14.0 92
DEADMAN HILL 10220 15.8 16.1 98 16.2 16.6 98
DEER PARK 9700 10.3 16.8 61 15.1 21.6 70
LAPRELE CREEK 8375 9.2 10.9 84 11.0 12.4 89
RENO HILL 8400 13.2 13.9 95 14.3 14.6 98
ROACH 9700 14.3 16.8 85 16.7 18.3 91
SAND LAKE 10050 29.2 32.1 91 27.4 23.7 116
SOUTH PASS 9040 11.3 16.6 68 13.3 18.2 73
WINDY PEAK 7900 8.6 8.0 108 9.4 10.3 91
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Basin wide percent of average 87 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 16.1 11.3 142 17.8 15.6 114
DIVIDE PEAK 8880 23.0 19.7 117 24.5 20.5 120
OLD BATTLE 10000 32.0 31.9 100 36.3 34.2 106
SANDSTONE RS 8150 17.6 14.9 118 19.7 18.6 106
WHISKEY PARK 8950 32.2 30.1 107 32.2 28.4 113
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Basin wide percent of average 112 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 11.8 14.4 82 11.6 13.3 87
BLIND BULL SUM 8650 25.5 28.0 91 19.2 22.2 86
EAST RIM DIVIDE 7930 9.4 13.1 72 11.6 12.0 97
ELKHART PARK G.S. 9400 12.3 13.4 92 13.5 13.2 102
GROS VENTRE SUMMIT 8750 11.5 14.2 81 15.4 12.8 120
GUNSIGHT PASS 9820 14.7 -M * 15.5 -M *
KENDALL R.S. 7740 11.3 14.6 77 13.4 14.5 92
LOOMIS PARK 8240 15.7 17.4 90 18.0 17.3 104
NEW FORK LAKE 8340 11.4 11.2 102 10.1 11.3 89
SNIDER BASIN 8060 13.9 14.6 95 14.2 16.1 88
SPRING CREEK DIVIDE 9000 26.4 26.5 100 25.6 26.3 97
TRIPLE PEAK 8500 23.9 24.9 96 25.4 24.7 103
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Basin wide percent of average 90 97
LOWER GREEN RIVER
HAMS FORK 7840 10.6 12.2 87 11.0 12.2 90
HEWINTA 9519 8.4 11.8 71 12.5 14.4 87
HICKERSON PARK 9145 3.8 7.4 51 7.0 7.8 90
HOLE-IN-ROCK 9150 4.4 7.0 63 7.1 7.3 97
INDIAN CREEK 9425 23.7 27.8 85 20.8 25.3 82
KELLEY R.S. 8180 15.5 16.9 92 17.0 20.2 84
STEEL CREEK PARK 10200 11.6 15.6 74 15.0 15.9 94
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Basin wide percent of average 79 88
UPPER BEAR RIVER
BUG LAKE 7950 18.1 20.9 87 17.2 19.1 90
HAYDEN FORK 9212 14.9 16.3 91 20.1 20.8 97
KELLEY R.S. 8180 15.5 16.9 92 17.0 20.2 84
LILY LAKE 9156 13.5 13.0 104 15.6 17.3 90
MONTE CRISTO 8960 26.0 29.8 87 25.1 25.3 99
SALT RIVER SUMMIT 7760 14.2 14.4 99 15.5 18.7 83
TRIAL LAKE 9992 22.4 25.0 90 20.9 24.8 84
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Basin wide percent of average 91 90
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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.