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 WEDNESDAY: APRIL 22 , 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 12.5 15.4 81 21.3 23.5 91
COTTONWOOD CREEK 7670 26.9 22.7 119 34.7 30.5 114
GRAND TARGHEE 9260 49.4 -M * 38.3 -M *
GRANITE CREEK 6770 15.0 15.7 96 23.2 21.6 107
GRASSY LAKE 7265 32.6 36.3 90 38.0 39.4 96
GROS VENTRE SUMMIT 8750 -M 14.4 * 17.4 14.5 120
GUNSIGHT PASS 9820 16.3 -M * 17.9 -M *
LEWIS LAKE DIVIDE 7850 34.1 36.4 94 36.4 40.3 90
PHILLIPS BENCH 8200 30.0 30.6 98 33.0 31.9 103
SALT RIVER SUMMIT 7760 14.7 13.4 110 18.4 20.8 88
SNAKE RIVER STATION 6920 15.4 15.9 97 24.7 24.6 100
SPRING CREEK DIVIDE 9000 31.6 28.9 109 29.9 29.1 103
THUMB DIVIDE 7980 20.4 17.6 116 23.8 21.0 113
TOGWOTEE PASS 9580 30.0 27.3 110 32.6 27.6 118
TWO OCEAN PLATEAU 9240 41.4 31.3 132 32.1 30.7 105
WILLOW CREEK 8380 35.0 31.9 110 43.3 35.9 121
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Basin wide percent of average 105 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.9 25.7 97 23.0 22.4 103
BLACK BEAR 8170 37.5 40.9 92 38.9 44.3 88
CANYON 7870 13.6 13.0 105 16.5 17.0 97
FISHER CREEK 9100 38.5 37.6 102 38.5 40.2 96
MADISON PLATEAU 7750 24.2 25.8 94 26.9 29.5 91
NORTHEAST ENTRANCE 7350 7.2 9.5 76 15.0 14.1 106
PARKER PEAK 9400 30.0 23.9 126 20.4 18.4 111
SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109
THUMB DIVIDE 7980 20.4 17.6 116 23.8 21.0 113
TWO OCEAN PLATEAU 9240 41.4 31.3 132 32.1 30.7 105
WHISKEY CREEK 6800 18.1 17.3 105 22.6 23.2 97
WHITE MILL 8700 26.2 26.3 100 26.3 29.9 88
WOLVERINE 7650 10.4 9.8 106 13.6 14.4 94
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Basin wide percent of average 103 98
WIND RIVER
BURROUGHS CREEK 8750 17.2 14.8 116 18.6 18.3 102
COLD SPRINGS 9630 8.6 5.8 148 12.7 12.7 100
DEER PARK 9700 14.6 17.9 82 20.4 25.1 81
HOBBS PARK 10100 16.3 17.1 95 17.2 15.5 111
LITTLE WARM 9370 12.1 12.1 100 16.4 15.6 105
SOUTH PASS 9040 15.3 17.9 85 17.8 21.2 84
ST. LAWRENCE ALT 8620 7.3 6.6 111 12.1 10.9 111
TOGWOTEE PASS 9580 30.0 27.3 110 32.6 27.6 118
TOWNSEND CREEK 8700 11.3 9.6 118 15.2 14.2 107
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Basin wide percent of average 103 101
BIGHORN BASIN
BALD MTN. 9380 19.4 22.6 86 16.9 19.9 85
BEAR TRAP MEADOW 8200 6.4 3.7 173 10.5 9.9 106
BLACKWATER 9780 27.8 27.4 101 25.5 23.4 109
BONE SPRINGS DIV 9350 16.9 17.8 95 15.8 17.0 93
EVENING STAR 9200 31.3 32.4 97 33.9 28.5 119
GRAVE SPRINGS 8550 10.0 11.0 91 11.5 12.0 96
KIRWIN 9550 14.5 12.5 116 16.4 13.1 125
MARQUETTE 8760 7.9 10.7 74 10.6 12.2 87
MIDDLE POWDER 7760 12.1 14.3 85 11.6 14.5 80
OWL CREEK 8975 5.0 4.7 106 7.7 7.3 105
POWDER RIVER PASS 9480 11.8 11.7 101 16.0 14.5 110
SHELL CREEK 9580 17.5 16.3 107 17.0 15.5 110
SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109
SYLVAN ROAD 7120 9.6 10.7 90 21.0 19.5 108
TIMBER CREEK 7950 4.7 5.2 90 9.4 9.2 102
YOUNTS PEAK 8350 19.5 18.2 107 17.7 18.0 98
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Basin wide percent of average 97 103
SHOSHONE RIVER
BLACKWATER 9780 27.8 27.4 101 25.5 23.4 109
EVENING STAR 9200 31.3 32.4 97 33.9 28.5 119
KIRWIN 9550 14.5 12.5 116 16.4 13.1 125
MARQUETTE 8760 7.9 10.7 74 10.6 12.2 87
SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109
SYLVAN ROAD 7120 9.6 10.7 90 21.0 19.5 108
YOUNTS PEAK 8350 19.5 18.2 107 17.7 18.0 98
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Basin wide percent of average 97 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 6.4 3.7 173 10.5 9.9 106
BIG GOOSE 7990 11.1 12.5 89 14.8 11.5 129
BONE SPRINGS DIV 9350 16.9 17.8 95 15.8 17.0 93
BURGESS JUNCTION 7880 13.2 13.3 99 14.5 14.2 102
CLOUD PEAK RESERVOIR 9860 19.2 15.8 122 19.3 15.5 125
DOME LAKE 8880 13.4 13.8 97 17.5 15.5 113
GRAVE SPRINGS 8550 10.0 11.0 91 11.5 12.0 96
HANSEN SAWMILL 8360 5.5 5.6 98 11.5 9.9 116
MIDDLE POWDER 7760 12.1 14.3 85 11.6 14.5 80
POWDER RIVER PASS 9480 11.8 11.7 101 16.0 14.5 110
SUCKER CREEK 8880 15.8 13.5 117 19.0 16.0 119
TIE CREEK 6870 5.3 5.2 102 16.1 12.1 133
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Basin wide percent of average 102 110
BELLE FOURCHE
BLIND PARK 6890 1.5 6.8 22 15.8 13.0 122
COLE CANYON 5910 6.1 6.7 91 13.8 8.2 168
NORTH RAPID CREEK 6130 5.9 7.8 76 15.9 10.1 157
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Basin wide percent of average 63 145
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.9 23.8 113 30.3 28.0 108
DIVIDE PEAK 8880 27.7 20.8 133 30.4 23.1 132
ELK RIVER 8700 22.2 18.5 120 24.6 21.9 112
JOE WRIGHT 10120 26.4 24.4 108 32.3 28.3 114
NORTH FRENCH CREEK 10130 38.2 33.6 114 35.6 27.9 128
OLD BATTLE 10000 39.1 35.6 110 44.1 38.1 116
SAGE CREEK BASIN 7850 14.8 12.1 122 17.0 13.4 127
SOUTH BRUSH CREEK 8440 12.2 12.8 95 19.9 18.8 106
TOWER 10500 48.6 50.8 96 46.9 43.0 109
WEBBER SPRINGS 9250 28.7 26.0 110 33.6 29.7 113
WILLOW CREEK PASS 9540 14.5 14.1 103 14.6 14.7 99
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Basin wide percent of average 110 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 26.6 27.5 97 25.4 25.3 100
CASPER MTN. 7900 14.2 17.4 82 15.6 17.7 88
DEADMAN HILL 10220 21.5 19.0 113 21.7 19.5 111
DEER PARK 9700 14.6 17.9 82 20.4 25.1 81
LAPRELE CREEK 8375 8.8 9.3 95 15.1 15.0 101
RENO HILL 8400 16.9 16.0 106 19.7 18.4 107
ROACH 9700 19.2 18.5 104 22.3 21.1 106
SAND LAKE 10050 35.4 35.9 99 33.8 27.5 123
SOUTH PASS 9040 15.3 17.9 85 17.8 21.2 84
WINDY PEAK 7900 9.8 7.1 138 12.9 12.4 104
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Basin wide percent of average 98 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 13.5 7.2 188 20.6 17.7 116
DIVIDE PEAK 8880 27.7 20.8 133 30.4 23.1 132
OLD BATTLE 10000 39.1 35.6 110 44.1 38.1 116
SANDSTONE RS 8150 19.7 12.4 159 23.1 20.7 112
WHISKEY PARK 8950 34.9 30.6 114 38.0 32.0 119
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Basin wide percent of average 127 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.0 15.0 87 14.5 15.0 97
BLIND BULL SUM 8650 29.9 28.7 104 22.9 24.3 94
EAST RIM DIVIDE 7930 7.9 14.0 56 13.6 13.3 102
ELKHART PARK G.S. 9400 14.7 13.9 106 17.1 15.0 114
GROS VENTRE SUMMIT 8750 -M 14.4 * 17.4 14.5 120
GUNSIGHT PASS 9820 16.3 -M * 17.9 -M *
KENDALL R.S. 7740 8.1 12.6 64 15.1 15.9 95
LOOMIS PARK 8240 15.1 16.3 93 20.8 19.1 109
NEW FORK LAKE 8340 10.5 10.6 99 12.5 12.6 99
SNIDER BASIN 8060 15.0 14.5 103 16.9 17.9 94
SPRING CREEK DIVIDE 9000 31.6 28.9 109 29.9 29.1 103
TRIPLE PEAK 8500 24.7 25.7 96 29.6 27.4 108
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Basin wide percent of average 95 103
LOWER GREEN RIVER
HAMS FORK 7840 10.2 8.7 117 14.3 13.9 103
HEWINTA 9519 11.7 11.6 101 15.7 16.8 93
HICKERSON PARK 9145 6.9 7.7 90 11.8 9.4 126
HOLE-IN-ROCK 9150 6.3 6.6 95 11.3 8.9 127
INDIAN CREEK 9425 27.1 29.6 92 25.6 28.3 90
KELLEY R.S. 8180 16.4 16.4 100 20.6 22.6 91
STEEL CREEK PARK 10200 17.1 17.8 96 19.2 19.1 101
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Basin wide percent of average 97 100
UPPER BEAR RIVER
BUG LAKE 7950 19.9 20.9 95 20.4 21.4 95
HAYDEN FORK 9212 16.8 15.6 108 25.1 23.9 105
KELLEY R.S. 8180 16.4 16.4 100 20.6 22.6 91
LILY LAKE 9156 15.1 13.6 111 19.6 20.0 98
MONTE CRISTO 8960 29.7 30.2 98 30.2 28.7 105
SALT RIVER SUMMIT 7760 14.7 13.4 110 18.4 20.8 88
TRIAL LAKE 9992 27.5 26.6 103 27.1 28.0 97
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Basin wide percent of average 102 98
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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.