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 TUESDAY: APRIL 7 , 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 16.0 18.0 89 19.8 22.1 90
COTTONWOOD CREEK 7670 28.0 24.4 115 31.5 28.5 111
GRAND TARGHEE 9260 44.7 -M * 34.5 -M *
GRANITE CREEK 6770 16.8 18.3 92 21.2 20.5 103
GRASSY LAKE 7265 33.1 36.8 90 35.3 37.2 95
GROS VENTRE SUMMIT 8750 -M 14.6 * 15.9 13.4 119
GUNSIGHT PASS 9820 15.5 -M * 16.3 -M *
LEWIS LAKE DIVIDE 7850 31.9 36.4 88 33.8 38.0 89
PHILLIPS BENCH 8200 28.6 29.9 96 29.8 30.0 99
SALT RIVER SUMMIT 7760 15.6 14.9 105 16.9 19.5 87
SNAKE RIVER STATION 6920 17.8 19.0 94 22.6 23.0 98
SPRING CREEK DIVIDE 9000 28.3 27.6 103 27.3 27.4 100
THUMB DIVIDE 7980 20.9 19.3 108 21.6 19.6 110
TOGWOTEE PASS 9580 28.2 25.8 109 30.4 25.6 119
TWO OCEAN PLATEAU 9240 38.9 29.2 133 30.0 28.7 105
WILLOW CREEK 8380 35.7 31.2 114 39.9 33.4 119
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Basin wide percent of average 103 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 23.8 24.3 98 21.8 20.8 105
BLACK BEAR 8170 37.4 40.4 93 36.4 41.8 87
CANYON 7870 14.1 14.0 101 15.3 16.0 96
FISHER CREEK 9100 37.4 36.1 104 36.6 37.7 97
MADISON PLATEAU 7750 23.7 25.9 92 25.1 27.8 90
NORTHEAST ENTRANCE 7350 11.4 11.2 102 13.9 13.1 106
PARKER PEAK 9400 27.1 22.4 121 20.3 16.9 120
SYLVAN LAKE 8420 21.8 23.3 94 23.9 21.7 110
THUMB DIVIDE 7980 20.9 19.3 108 21.6 19.6 110
TWO OCEAN PLATEAU 9240 38.9 29.2 133 30.0 28.7 105
WHISKEY CREEK 6800 17.5 17.7 99 20.9 21.7 96
WHITE MILL 8700 25.4 25.1 101 24.9 28.0 89
WOLVERINE 7650 12.4 11.7 106 12.7 13.2 96
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Basin wide percent of average 104 99
WIND RIVER
BURROUGHS CREEK 8750 16.1 14.9 108 16.9 16.9 100
COLD SPRINGS 9630 8.4 8.7 97 11.0 11.1 99
DEER PARK 9700 13.6 17.3 79 18.4 22.9 80
HOBBS PARK 10100 15.3 15.8 97 15.3 13.5 113
LITTLE WARM 9370 12.5 12.3 102 15.2 13.9 109
SOUTH PASS 9040 14.5 17.2 84 16.2 19.2 84
ST. LAWRENCE ALT 8620 7.3 7.5 97 10.6 9.3 114
TOGWOTEE PASS 9580 28.2 25.8 109 30.4 25.6 119
TOWNSEND CREEK 8700 11.0 9.5 116 13.6 12.2 111
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Basin wide percent of average 98 102
BIGHORN BASIN
BALD MTN. 9380 20.2 20.5 99 16.2 18.1 90
BEAR TRAP MEADOW 8200 9.8 5.1 192 10.4 8.7 120
BLACKWATER 9780 26.2 25.5 103 23.8 21.4 111
BONE SPRINGS DIV 9350 18.6 16.9 110 15.3 15.2 101
EVENING STAR 9200 31.3 30.8 102 31.7 26.2 121
GRAVE SPRINGS 8550 10.5 9.9 106 11.1 10.2 109
KIRWIN 9550 13.5 11.8 114 14.9 11.7 127
MARQUETTE 8760 7.8 9.7 80 9.7 10.3 94
MIDDLE POWDER 7760 12.9 12.5 103 11.0 12.9 85
OWL CREEK 8975 6.1 5.7 107 5.8 6.2 94
POWDER RIVER PASS 9480 13.3 11.3 118 15.1 12.9 117
SHELL CREEK 9580 17.4 15.3 114 16.4 13.9 118
SYLVAN LAKE 8420 21.8 23.3 94 23.9 21.7 110
SYLVAN ROAD 7120 14.7 12.8 115 19.9 18.2 109
TIMBER CREEK 7950 4.9 5.9 83 8.4 7.8 108
YOUNTS PEAK 8350 18.4 17.6 105 16.2 16.7 97
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Basin wide percent of average 105 108
SHOSHONE RIVER
BLACKWATER 9780 26.2 25.5 103 23.8 21.4 111
EVENING STAR 9200 31.3 30.8 102 31.7 26.2 121
KIRWIN 9550 13.5 11.8 114 14.9 11.7 127
MARQUETTE 8760 7.8 9.7 80 9.7 10.3 94
SYLVAN LAKE 8420 21.8 23.3 94 23.9 21.7 110
SYLVAN ROAD 7120 14.7 12.8 115 19.9 18.2 109
YOUNTS PEAK 8350 18.4 17.6 105 16.2 16.7 97
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Basin wide percent of average 102 111
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.8 5.1 192 10.4 8.7 120
BIG GOOSE 7990 12.4 11.4 109 14.5 9.2 158
BONE SPRINGS DIV 9350 18.6 16.9 110 15.3 15.2 101
BURGESS JUNCTION 7880 14.0 12.3 114 14.3 12.7 113
CLOUD PEAK RESERVOIR 9860 19.3 14.1 137 18.1 13.5 134
DOME LAKE 8880 14.9 13.1 114 17.0 13.7 124
GRAVE SPRINGS 8550 10.5 9.9 106 11.1 10.2 109
HANSEN SAWMILL 8360 8.2 6.5 126 11.1 8.6 129
MIDDLE POWDER 7760 12.9 12.5 103 11.0 12.9 85
POWDER RIVER PASS 9480 13.3 11.3 118 15.1 12.9 117
SUCKER CREEK 8880 16.8 12.5 134 18.6 14.1 132
TIE CREEK 6870 8.4 6.3 133 15.9 10.4 153
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Basin wide percent of average 121 121
BELLE FOURCHE
BLIND PARK 6890 6.8 8.2 83 15.2 11.5 132
COLE CANYON 5910 7.8 7.1 110 13.5 7.0 193
NORTH RAPID CREEK 6130 11.2 8.7 129 14.8 8.9 166
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Basin wide percent of average 108 159
UPPER N. PLATTE RIVER
COLUMBINE 9160 28.5 25.1 114 28.5 26.0 110
DIVIDE PEAK 8880 26.0 20.4 127 27.2 21.4 127
ELK RIVER 8700 24.1 20.0 120 23.0 20.2 114
JOE WRIGHT 10120 24.6 22.3 110 29.7 25.7 116
NORTH FRENCH CREEK 10130 36.3 30.7 118 32.9 25.5 129
OLD BATTLE 10000 36.0 33.3 108 40.7 35.6 114
SAGE CREEK BASIN 7850 14.6 11.8 124 15.0 12.4 121
SOUTH BRUSH CREEK 8440 13.9 13.4 104 17.7 17.0 104
TOWER 10500 47.1 47.2 100 43.8 39.6 111
WEBBER SPRINGS 9250 27.4 26.4 104 31.0 27.6 112
WILLOW CREEK PASS 9540 13.7 12.7 108 13.6 13.3 102
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Basin wide percent of average 111 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.0 24.8 101 23.2 22.9 101
CASPER MTN. 7900 14.6 15.4 95 14.7 15.2 97
DEADMAN HILL 10220 17.4 17.1 102 17.8 17.6 101
DEER PARK 9700 13.6 17.3 79 18.4 22.9 80
LAPRELE CREEK 8375 10.1 11.0 92 13.7 13.1 105
RENO HILL 8400 16.5 15.0 110 17.5 15.8 111
ROACH 9700 17.2 17.8 97 19.5 19.3 101
SAND LAKE 10050 32.6 33.6 97 29.8 25.0 119
SOUTH PASS 9040 14.5 17.2 84 16.2 19.2 84
WINDY PEAK 7900 10.2 8.4 121 11.4 11.0 104
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Basin wide percent of average 97 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.5 10.3 180 19.1 16.4 116
DIVIDE PEAK 8880 26.0 20.4 127 27.2 21.4 127
OLD BATTLE 10000 36.0 33.3 108 40.7 35.6 114
SANDSTONE RS 8150 20.1 14.4 140 21.2 19.3 110
WHISKEY PARK 8950 35.6 30.7 116 35.5 29.6 120
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Basin wide percent of average 125 117
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.7 15.0 85 12.4 13.8 90
BLIND BULL SUM 8650 27.6 28.7 96 20.3 23.0 88
EAST RIM DIVIDE 7930 10.6 13.6 78 12.4 12.5 99
ELKHART PARK G.S. 9400 13.5 13.8 98 14.7 13.8 107
GROS VENTRE SUMMIT 8750 -M 14.6 * 15.9 13.4 119
GUNSIGHT PASS 9820 15.5 -M * 16.3 -M *
KENDALL R.S. 7740 11.9 14.4 83 14.1 15.0 94
LOOMIS PARK 8240 16.9 17.5 97 19.1 18.0 106
NEW FORK LAKE 8340 12.5 11.5 109 11.0 11.7 94
SNIDER BASIN 8060 15.1 14.9 101 15.4 16.7 92
SPRING CREEK DIVIDE 9000 28.3 27.6 103 27.3 27.4 100
TRIPLE PEAK 8500 25.1 25.6 98 26.9 25.6 105
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Basin wide percent of average 95 99
LOWER GREEN RIVER
HAMS FORK 7840 11.7 11.4 103 12.5 12.7 98
HEWINTA 9519 12.0 12.5 96 14.5 15.2 95
HICKERSON PARK 9145 5.9 8.1 73 9.2 8.3 111
HOLE-IN-ROCK 9150 6.6 7.4 89 9.4 7.8 121
INDIAN CREEK 9425 26.0 28.9 90 22.9 26.4 87
KELLEY R.S. 8180 17.2 17.4 99 18.7 21.1 89
STEEL CREEK PARK 10200 14.2 16.4 87 17.5 17.0 103
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Basin wide percent of average 92 96
UPPER BEAR RIVER
BUG LAKE 7950 20.2 21.6 94 18.7 19.9 94
HAYDEN FORK 9212 17.6 16.9 104 22.8 21.8 105
KELLEY R.S. 8180 17.2 17.4 99 18.7 21.1 89
LILY LAKE 9156 15.8 14.3 110 17.6 18.2 97
MONTE CRISTO 8960 28.5 30.4 94 27.6 26.5 104
SALT RIVER SUMMIT 7760 15.6 14.9 105 16.9 19.5 87
TRIAL LAKE 9992 25.0 25.8 97 23.4 25.9 90
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Basin wide percent of average 99 95
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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.