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 THURSDAY: APRIL 16 , 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 16.8 94 21.2 22.9 93
COTTONWOOD CREEK 7670 29.5 23.8 124 34.3 29.8 115
GRAND TARGHEE 9260 48.6 -M * 37.7 -M *
GRANITE CREEK 6770 17.1 17.0 101 22.9 21.1 109
GRASSY LAKE 7265 35.0 37.0 95 37.7 38.5 98
GROS VENTRE SUMMIT 8750 -M 14.6 * 17.2 14.0 123
GUNSIGHT PASS 9820 16.3 -M * 17.6 -M *
LEWIS LAKE DIVIDE 7850 34.6 36.7 94 36.5 39.4 93
PHILLIPS BENCH 8200 30.4 30.6 99 32.4 31.2 104
SALT RIVER SUMMIT 7760 16.1 14.4 112 18.2 20.3 90
SNAKE RIVER STATION 6920 18.9 17.5 108 24.8 24.0 103
SPRING CREEK DIVIDE 9000 30.5 28.5 107 29.3 28.5 103
THUMB DIVIDE 7980 22.5 18.7 120 23.7 20.5 116
TOGWOTEE PASS 9580 30.3 26.7 113 32.1 26.8 120
TWO OCEAN PLATEAU 9240 41.1 30.6 134 31.9 29.9 107
WILLOW CREEK 8380 38.3 31.9 120 42.8 34.9 123
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Basin wide percent of average 109 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 25.1 25.5 98 22.9 21.8 105
BLACK BEAR 8170 39.2 40.9 96 38.6 43.3 89
CANYON 7870 15.1 13.9 109 16.5 16.6 99
FISHER CREEK 9100 39.0 37.0 105 37.9 39.2 97
MADISON PLATEAU 7750 25.2 26.1 97 26.7 28.9 92
NORTHEAST ENTRANCE 7350 11.1 10.7 104 15.0 13.7 109
PARKER PEAK 9400 29.6 23.4 126 20.4 17.8 115
SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112
THUMB DIVIDE 7980 22.5 18.7 120 23.7 20.5 116
TWO OCEAN PLATEAU 9240 41.1 30.6 134 31.9 29.9 107
WHISKEY CREEK 6800 18.7 17.8 105 22.4 22.6 99
WHITE MILL 8700 26.6 26.0 102 26.3 29.1 90
WOLVERINE 7650 12.3 11.0 112 13.3 13.9 96
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Basin wide percent of average 107 100
WIND RIVER
BURROUGHS CREEK 8750 17.2 15.1 114 17.8 17.7 101
COLD SPRINGS 9630 9.2 7.1 130 12.2 12.1 101
DEER PARK 9700 14.6 17.1 85 19.5 24.1 81
HOBBS PARK 10100 16.4 16.8 98 16.7 14.7 114
LITTLE WARM 9370 13.1 12.5 105 16.1 14.9 108
SOUTH PASS 9040 15.1 17.7 85 16.8 20.4 82
ST. LAWRENCE ALT 8620 7.9 7.3 108 11.7 10.2 115
TOGWOTEE PASS 9580 30.3 26.7 113 32.1 26.8 120
TOWNSEND CREEK 8700 11.2 9.8 114 14.2 13.4 106
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Basin wide percent of average 104 102
BIGHORN BASIN
BALD MTN. 9380 20.1 21.9 92 16.8 19.1 88
BEAR TRAP MEADOW 8200 8.0 4.7 170 10.3 9.4 110
BLACKWATER 9780 28.1 26.9 104 25.3 22.6 112
BONE SPRINGS DIV 9350 18.3 17.7 103 15.7 16.3 96
EVENING STAR 9200 32.2 32.0 101 33.6 27.6 122
GRAVE SPRINGS 8550 10.2 10.7 95 11.2 11.4 98
KIRWIN 9550 14.5 12.3 118 15.8 12.5 126
MARQUETTE 8760 8.3 10.6 78 10.3 11.4 90
MIDDLE POWDER 7760 12.4 14.0 89 11.2 13.9 81
OWL CREEK 8975 6.2 5.2 119 7.2 6.9 104
POWDER RIVER PASS 9480 13.5 11.9 113 16.0 13.8 116
SHELL CREEK 9580 17.9 16.1 111 16.9 14.9 113
SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112
SYLVAN ROAD 7120 14.5 12.1 120 21.0 19.0 111
TIMBER CREEK 7950 5.5 5.7 96 9.3 8.6 108
YOUNTS PEAK 8350 19.5 18.1 108 17.5 17.5 100
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Basin wide percent of average 103 106
SHOSHONE RIVER
BLACKWATER 9780 28.1 26.9 104 25.3 22.6 112
EVENING STAR 9200 32.2 32.0 101 33.6 27.6 122
KIRWIN 9550 14.5 12.3 118 15.8 12.5 126
MARQUETTE 8760 8.3 10.6 78 10.3 11.4 90
SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112
SYLVAN ROAD 7120 14.5 12.1 120 21.0 19.0 111
YOUNTS PEAK 8350 19.5 18.1 108 17.5 17.5 100
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Basin wide percent of average 102 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.0 4.7 170 10.3 9.4 110
BIG GOOSE 7990 11.8 12.4 95 14.7 10.6 139
BONE SPRINGS DIV 9350 18.3 17.7 103 15.7 16.3 96
BURGESS JUNCTION 7880 13.8 13.2 105 14.4 13.6 106
CLOUD PEAK RESERVOIR 9860 19.8 15.3 129 18.8 14.7 128
DOME LAKE 8880 14.4 14.0 103 17.4 14.8 118
GRAVE SPRINGS 8550 10.2 10.7 95 11.2 11.4 98
HANSEN SAWMILL 8360 7.3 6.2 118 11.2 9.3 120
MIDDLE POWDER 7760 12.4 14.0 89 11.2 13.9 81
POWDER RIVER PASS 9480 13.5 11.9 113 16.0 13.8 116
SUCKER CREEK 8880 16.5 13.5 122 18.9 15.2 124
TIE CREEK 6870 7.0 5.3 132 16.0 11.4 140
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Basin wide percent of average 110 114
BELLE FOURCHE
BLIND PARK 6890 5.0 7.6 66 15.9 12.3 129
COLE CANYON 5910 6.9 7.1 97 13.6 7.7 177
NORTH RAPID CREEK 6130 9.0 8.8 102 15.7 9.6 164
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Basin wide percent of average 89 153
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.8 24.7 109 29.2 27.2 107
DIVIDE PEAK 8880 26.6 20.9 127 29.3 22.4 131
ELK RIVER 8700 23.1 19.6 118 23.9 21.2 113
JOE WRIGHT 10120 24.4 23.6 103 30.2 27.2 111
NORTH FRENCH CREEK 10130 37.3 32.6 114 34.7 26.9 129
OLD BATTLE 10000 37.8 34.7 109 43.1 37.2 116
SAGE CREEK BASIN 7850 14.5 12.1 120 16.6 13.0 128
SOUTH BRUSH CREEK 8440 13.2 13.3 99 19.2 18.1 106
TOWER 10500 47.5 49.5 96 44.9 41.7 108
WEBBER SPRINGS 9250 28.3 26.1 108 32.6 28.9 113
WILLOW CREEK PASS 9540 13.8 13.6 101 13.7 14.1 97
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Basin wide percent of average 108 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.6 26.5 97 23.9 24.4 98
CASPER MTN. 7900 14.1 16.8 84 15.1 16.7 90
DEADMAN HILL 10220 18.5 18.3 101 18.8 18.7 101
DEER PARK 9700 14.6 17.1 85 19.5 24.1 81
LAPRELE CREEK 8375 9.4 10.2 92 14.4 14.2 101
RENO HILL 8400 17.1 15.9 108 18.8 17.3 109
ROACH 9700 17.2 18.4 93 20.1 20.4 99
SAND LAKE 10050 33.9 35.0 97 32.0 26.5 121
SOUTH PASS 9040 15.1 17.7 85 16.8 20.4 82
WINDY PEAK 7900 9.3 8.0 116 11.7 11.8 99
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Basin wide percent of average 95 98
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 16.3 8.7 187 20.0 17.2 116
DIVIDE PEAK 8880 26.6 20.9 127 29.3 22.4 131
OLD BATTLE 10000 37.8 34.7 109 43.1 37.2 116
SANDSTONE RS 8150 21.4 13.4 160 22.6 20.1 112
WHISKEY PARK 8950 36.0 30.7 117 37.3 31.0 120
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Basin wide percent of average 127 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.8 15.3 90 14.0 14.5 97
BLIND BULL SUM 8650 29.9 28.9 103 22.5 23.8 95
EAST RIM DIVIDE 7930 11.0 14.0 79 13.5 12.9 105
ELKHART PARK G.S. 9400 15.3 14.0 109 16.8 14.5 116
GROS VENTRE SUMMIT 8750 -M 14.6 * 17.2 14.0 123
GUNSIGHT PASS 9820 16.3 -M * 17.6 -M *
KENDALL R.S. 7740 11.3 13.6 83 15.0 15.5 97
LOOMIS PARK 8240 17.7 17.1 104 20.3 18.7 109
NEW FORK LAKE 8340 12.8 11.3 113 12.0 12.3 98
SNIDER BASIN 8060 15.6 14.9 105 16.5 17.5 94
SPRING CREEK DIVIDE 9000 30.5 28.5 107 29.3 28.5 103
TRIPLE PEAK 8500 26.1 25.9 101 29.1 26.7 109
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Basin wide percent of average 100 104
LOWER GREEN RIVER
HAMS FORK 7840 13.0 10.0 130 14.0 13.4 104
HEWINTA 9519 13.3 12.3 108 15.4 16.2 95
HICKERSON PARK 9145 7.4 8.3 89 11.2 8.9 126
HOLE-IN-ROCK 9150 7.6 7.3 104 10.9 8.5 128
INDIAN CREEK 9425 27.8 29.6 94 25.0 27.6 91
KELLEY R.S. 8180 18.1 17.2 105 20.4 22.0 93
STEEL CREEK PARK 10200 15.6 17.3 90 18.9 18.3 103
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Basin wide percent of average 101 101
UPPER BEAR RIVER
BUG LAKE 7950 20.9 21.7 96 20.2 20.8 97
HAYDEN FORK 9212 19.3 16.5 117 24.9 23.1 108
KELLEY R.S. 8180 18.1 17.2 105 20.4 22.0 93
LILY LAKE 9156 17.5 14.5 121 19.5 19.4 101
MONTE CRISTO 8960 31.0 30.6 101 29.8 27.8 107
SALT RIVER SUMMIT 7760 16.1 14.4 112 18.2 20.3 90
TRIAL LAKE 9992 28.2 26.4 107 26.7 27.2 98
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Basin wide percent of average 107 99
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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.