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 SATURDAY: APRIL 11 , 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 15.8 17.6 90 20.1 22.5 89
COTTONWOOD CREEK 7670 28.8 24.3 119 33.0 29.0 114
GRAND TARGHEE 9260 46.5 -M * 35.9 -M *
GRANITE CREEK 6770 17.1 17.8 96 21.7 20.7 105
GRASSY LAKE 7265 33.9 37.1 91 36.3 37.8 96
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.7 119
GUNSIGHT PASS 9820 16.0 -M * 17.0 -M *
LEWIS LAKE DIVIDE 7850 32.3 36.6 88 34.8 38.6 90
PHILLIPS BENCH 8200 29.4 30.3 97 30.7 30.6 100
SALT RIVER SUMMIT 7760 15.8 14.8 107 17.3 19.9 87
SNAKE RIVER STATION 6920 17.8 18.5 96 23.2 23.5 99
SPRING CREEK DIVIDE 9000 29.2 28.1 104 28.0 27.9 100
THUMB DIVIDE 7980 21.6 19.2 113 22.3 20.0 112
TOGWOTEE PASS 9580 28.6 26.2 109 30.9 26.1 118
TWO OCEAN PLATEAU 9240 40.0 29.9 134 30.9 29.2 106
WILLOW CREEK 8380 37.2 31.6 118 41.5 34.1 122
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Basin wide percent of average 105 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.8 24.9 100 22.7 21.2 107
BLACK BEAR 8170 37.5 40.6 92 37.3 42.5 88
CANYON 7870 14.3 14.1 101 15.6 16.2 96
FISHER CREEK 9100 38.2 36.6 104 37.0 38.3 97
MADISON PLATEAU 7750 23.9 26.0 92 25.4 28.3 90
NORTHEAST ENTRANCE 7350 11.7 11.0 106 14.8 13.4 110
PARKER PEAK 9400 29.1 23.0 127 -M 17.3 *
SYLVAN LAKE 8420 22.4 23.8 94 24.9 22.1 113
THUMB DIVIDE 7980 21.6 19.2 113 22.3 20.0 112
TWO OCEAN PLATEAU 9240 40.0 29.9 134 30.9 29.2 106
WHISKEY CREEK 6800 17.6 17.8 99 21.0 22.2 95
WHITE MILL 8700 -M 25.5 * -M 28.5 *
WOLVERINE 7650 12.6 11.6 109 13.3 13.5 99
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Basin wide percent of average 105 99
WIND RIVER
BURROUGHS CREEK 8750 16.2 15.1 107 16.9 17.2 98
COLD SPRINGS 9630 8.5 8.2 104 11.3 11.6 97
DEER PARK 9700 14.0 17.3 81 18.9 23.4 81
HOBBS PARK 10100 15.8 16.2 98 15.9 14.0 114
LITTLE WARM 9370 12.4 12.4 100 15.4 14.3 108
SOUTH PASS 9040 14.8 17.5 85 16.6 19.7 84
ST. LAWRENCE ALT 8620 7.6 7.5 101 10.9 9.7 112
TOGWOTEE PASS 9580 28.6 26.2 109 30.9 26.1 118
TOWNSEND CREEK 8700 11.1 9.6 116 13.8 12.7 109
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Basin wide percent of average 99 101
BIGHORN BASIN
BALD MTN. 9380 19.8 21.1 94 16.3 18.5 88
BEAR TRAP MEADOW 8200 9.2 5.0 184 10.3 9.0 114
BLACKWATER 9780 27.5 26.1 105 24.8 21.9 113
BONE SPRINGS DIV 9350 18.3 17.2 106 15.4 15.7 98
EVENING STAR 9200 32.0 31.6 101 33.1 26.8 124
GRAVE SPRINGS 8550 10.5 10.3 102 11.2 10.7 105
KIRWIN 9550 13.9 12.1 115 15.1 12.1 125
MARQUETTE 8760 8.1 10.0 81 10.0 10.8 93
MIDDLE POWDER 7760 13.0 13.2 98 11.1 13.3 83
OWL CREEK 8975 6.4 5.6 114 6.5 6.5 100
POWDER RIVER PASS 9480 13.0 11.6 112 15.2 13.3 114
SHELL CREEK 9580 17.4 15.7 111 16.4 14.3 115
SYLVAN LAKE 8420 22.4 23.8 94 24.9 22.1 113
SYLVAN ROAD 7120 15.2 12.7 120 20.5 18.6 110
TIMBER CREEK 7950 5.0 5.8 86 8.5 8.1 105
YOUNTS PEAK 8350 18.6 17.9 104 16.4 17.1 96
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Basin wide percent of average 104 107
SHOSHONE RIVER
BLACKWATER 9780 27.5 26.1 105 24.8 21.9 113
EVENING STAR 9200 32.0 31.6 101 33.1 26.8 124
KIRWIN 9550 13.9 12.1 115 15.1 12.1 125
MARQUETTE 8760 8.1 10.0 81 10.0 10.8 93
SYLVAN LAKE 8420 22.4 23.8 94 24.9 22.1 113
SYLVAN ROAD 7120 15.2 12.7 120 20.5 18.6 110
YOUNTS PEAK 8350 18.6 17.9 104 16.4 17.1 96
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Basin wide percent of average 103 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.2 5.0 184 10.3 9.0 114
BIG GOOSE 7990 12.2 11.9 103 14.5 9.8 148
BONE SPRINGS DIV 9350 18.3 17.2 106 15.4 15.7 98
BURGESS JUNCTION 7880 13.9 12.7 109 14.4 13.1 110
CLOUD PEAK RESERVOIR 9860 19.0 14.6 130 18.3 14.0 131
DOME LAKE 8880 14.5 13.4 108 17.1 14.2 120
GRAVE SPRINGS 8550 10.5 10.3 102 11.2 10.7 105
HANSEN SAWMILL 8360 7.7 6.4 120 11.1 8.9 125
MIDDLE POWDER 7760 13.0 13.2 98 11.1 13.3 83
POWDER RIVER PASS 9480 13.0 11.6 112 15.2 13.3 114
SUCKER CREEK 8880 16.6 12.9 129 18.8 14.6 129
TIE CREEK 6870 8.1 5.8 140 16.0 10.8 148
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Basin wide percent of average 116 118
BELLE FOURCHE
BLIND PARK 6890 7.4 7.9 94 15.6 11.8 132
COLE CANYON 5910 8.0 7.2 111 13.4 7.2 186
NORTH RAPID CREEK 6130 10.6 8.9 119 15.1 9.1 166
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Basin wide percent of average 108 157
UPPER N. PLATTE RIVER
COLUMBINE 9160 27.8 25.0 111 29.1 26.5 110
DIVIDE PEAK 8880 27.5 20.7 133 29.0 21.8 133
ELK RIVER 8700 23.8 20.1 118 23.5 20.7 114
JOE WRIGHT 10120 24.3 22.9 106 29.6 26.4 112
NORTH FRENCH CREEK 10130 37.1 31.6 117 33.9 26.1 130
OLD BATTLE 10000 37.8 33.9 112 41.2 36.3 113
SAGE CREEK BASIN 7850 15.5 12.0 129 16.2 12.7 128
SOUTH BRUSH CREEK 8440 14.2 13.4 106 18.9 17.5 108
TOWER 10500 47.6 48.3 99 44.8 40.5 111
WEBBER SPRINGS 9250 28.2 26.3 107 32.2 28.2 114
WILLOW CREEK PASS 9540 14.0 13.1 107 13.6 13.7 99
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Basin wide percent of average 111 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.4 25.6 99 23.5 23.6 100
CASPER MTN. 7900 14.2 16.0 89 14.8 15.8 94
DEADMAN HILL 10220 17.6 17.7 99 17.9 18.1 99
DEER PARK 9700 14.0 17.3 81 18.9 23.4 81
LAPRELE CREEK 8375 9.4 10.8 87 14.0 13.6 103
RENO HILL 8400 16.1 15.5 104 17.6 16.5 107
ROACH 9700 17.3 18.2 95 19.8 19.8 100
SAND LAKE 10050 33.3 34.2 97 31.2 25.7 121
SOUTH PASS 9040 14.8 17.5 85 16.6 19.7 84
WINDY PEAK 7900 9.5 8.4 113 11.4 11.3 101
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Basin wide percent of average 95 99
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.8 9.7 194 19.9 16.8 118
DIVIDE PEAK 8880 27.5 20.7 133 29.0 21.8 133
OLD BATTLE 10000 37.8 33.9 112 41.2 36.3 113
SANDSTONE RS 8150 21.8 14.1 155 22.5 19.7 114
WHISKEY PARK 8950 35.4 30.7 115 37.0 30.2 123
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Basin wide percent of average 130 120
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.5 15.2 89 13.5 14.1 96
BLIND BULL SUM 8650 28.4 28.9 98 20.8 23.4 89
EAST RIM DIVIDE 7930 10.8 13.8 78 12.7 12.7 100
ELKHART PARK G.S. 9400 14.6 14.0 104 15.8 14.2 111
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.7 119
GUNSIGHT PASS 9820 16.0 -M * 17.0 -M *
KENDALL R.S. 7740 11.9 14.1 84 14.4 15.2 95
LOOMIS PARK 8240 17.3 17.4 99 19.5 18.3 107
NEW FORK LAKE 8340 12.7 11.5 110 11.6 12.0 97
SNIDER BASIN 8060 15.2 15.0 101 15.7 17.1 92
SPRING CREEK DIVIDE 9000 29.2 28.1 104 28.0 27.9 100
TRIPLE PEAK 8500 25.2 25.8 98 27.5 26.1 105
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Basin wide percent of average 97 101
LOWER GREEN RIVER
HAMS FORK 7840 11.9 10.8 110 12.7 13.0 98
HEWINTA 9519 12.8 12.5 102 14.7 15.6 94
HICKERSON PARK 9145 5.8 8.4 69 9.5 8.6 110
HOLE-IN-ROCK 9150 6.3 7.5 84 9.5 8.1 117
INDIAN CREEK 9425 26.3 29.3 90 23.6 27.0 87
KELLEY R.S. 8180 17.4 17.4 100 19.3 21.5 90
STEEL CREEK PARK 10200 14.5 16.8 86 17.7 17.6 101
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Basin wide percent of average 93 96
UPPER BEAR RIVER
BUG LAKE 7950 20.5 21.8 94 19.1 20.3 94
HAYDEN FORK 9212 17.7 16.8 105 23.0 22.4 103
KELLEY R.S. 8180 17.4 17.4 100 19.3 21.5 90
LILY LAKE 9156 16.1 14.6 110 17.9 18.8 95
MONTE CRISTO 8960 29.1 30.6 95 28.2 27.0 104
SALT RIVER SUMMIT 7760 15.8 14.8 107 17.3 19.9 87
TRIAL LAKE 9992 25.3 26.1 97 23.9 26.4 91
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Basin wide percent of average 100 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.