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: APRIL 13 , 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 15.5 17.3 90 20.3 22.7 89
COTTONWOOD CREEK 7670 28.6 24.1 119 33.0 29.3 113
GRAND TARGHEE 9260 47.1 -M * 36.3 -M *
GRANITE CREEK 6770 16.9 17.5 97 21.7 20.9 104
GRASSY LAKE 7265 33.9 37.1 91 36.4 38.1 96
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.8 118
GUNSIGHT PASS 9820 15.8 -M * 17.0 -M *
LEWIS LAKE DIVIDE 7850 32.5 36.7 89 34.8 38.9 89
PHILLIPS BENCH 8200 29.3 30.4 96 30.7 30.8 100
SALT RIVER SUMMIT 7760 15.4 14.7 105 17.2 20.0 86
SNAKE RIVER STATION 6920 17.8 18.1 98 23.1 23.7 97
SPRING CREEK DIVIDE 9000 29.3 28.3 104 28.0 28.1 100
THUMB DIVIDE 7980 21.0 19.0 111 22.2 20.2 110
TOGWOTEE PASS 9580 28.8 26.4 109 30.9 26.4 117
TWO OCEAN PLATEAU 9240 40.1 30.2 133 31.0 29.5 105
WILLOW CREEK 8380 37.4 31.7 118 41.5 34.4 121
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Basin wide percent of average 105 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.7 25.2 98 22.7 21.5 106
BLACK BEAR 8170 37.0 40.8 91 37.3 42.8 87
CANYON 7870 14.4 14.1 102 15.6 16.4 95
FISHER CREEK 9100 38.2 36.8 104 37.5 38.7 97
MADISON PLATEAU 7750 23.8 26.1 91 25.4 28.5 89
NORTHEAST ENTRANCE 7350 11.4 11.0 104 14.8 13.5 110
PARKER PEAK 9400 29.1 23.2 125 -M 17.5 *
SYLVAN LAKE 8420 21.9 24.0 91 24.9 22.4 111
THUMB DIVIDE 7980 21.0 19.0 111 22.2 20.2 110
TWO OCEAN PLATEAU 9240 40.1 30.2 133 31.0 29.5 105
WHISKEY CREEK 6800 17.5 17.8 98 21.0 22.4 94
WHITE MILL 8700 -M 25.7 * -M 28.7 *
WOLVERINE 7650 12.0 11.4 105 13.3 13.7 97
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Basin wide percent of average 104 99
WIND RIVER
BURROUGHS CREEK 8750 16.2 15.2 107 17.0 17.4 98
COLD SPRINGS 9630 8.4 7.8 108 11.3 11.8 96
DEER PARK 9700 14.0 17.0 82 19.0 23.7 80
HOBBS PARK 10100 15.9 16.6 96 15.8 14.3 110
LITTLE WARM 9370 12.4 12.6 98 15.4 14.5 106
SOUTH PASS 9040 14.9 17.7 84 16.7 20.0 84
ST. LAWRENCE ALT 8620 7.3 7.5 97 10.9 9.9 110
TOGWOTEE PASS 9580 28.8 26.4 109 30.9 26.4 117
TOWNSEND CREEK 8700 10.9 9.7 112 14.0 13.0 108
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Basin wide percent of average 99 100
BIGHORN BASIN
BALD MTN. 9380 19.8 21.4 93 16.3 18.8 87
BEAR TRAP MEADOW 8200 8.5 4.9 173 10.3 9.1 113
BLACKWATER 9780 27.4 26.4 104 24.8 22.2 112
BONE SPRINGS DIV 9350 18.7 17.4 107 15.4 15.9 97
EVENING STAR 9200 31.8 31.7 100 33.4 27.1 123
GRAVE SPRINGS 8550 10.4 10.5 99 11.2 11.0 102
KIRWIN 9550 13.8 12.2 113 15.1 12.2 124
MARQUETTE 8760 7.9 10.2 77 10.0 11.1 90
MIDDLE POWDER 7760 12.8 13.6 94 11.1 13.5 82
OWL CREEK 8975 6.1 5.4 113 6.6 6.6 100
POWDER RIVER PASS 9480 13.4 11.8 114 15.7 13.5 116
SHELL CREEK 9580 17.4 15.9 109 16.5 14.5 114
SYLVAN LAKE 8420 21.9 24.0 91 24.9 22.4 111
SYLVAN ROAD 7120 14.8 12.7 117 20.5 18.8 109
TIMBER CREEK 7950 5.1 5.8 88 8.6 8.3 104
YOUNTS PEAK 8350 18.7 18.0 104 16.4 17.2 95
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Basin wide percent of average 103 106
SHOSHONE RIVER
BLACKWATER 9780 27.4 26.4 104 24.8 22.2 112
EVENING STAR 9200 31.8 31.7 100 33.4 27.1 123
KIRWIN 9550 13.8 12.2 113 15.1 12.2 124
MARQUETTE 8760 7.9 10.2 77 10.0 11.1 90
SYLVAN LAKE 8420 21.9 24.0 91 24.9 22.4 111
SYLVAN ROAD 7120 14.8 12.7 117 20.5 18.8 109
YOUNTS PEAK 8350 18.7 18.0 104 16.4 17.2 95
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Basin wide percent of average 101 111
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.5 4.9 173 10.3 9.1 113
BIG GOOSE 7990 11.8 12.1 98 14.5 10.1 144
BONE SPRINGS DIV 9350 18.7 17.4 107 15.4 15.9 97
BURGESS JUNCTION 7880 13.9 12.9 108 14.3 13.3 108
CLOUD PEAK RESERVOIR 9860 19.1 14.9 128 18.3 14.3 128
DOME LAKE 8880 14.4 13.7 105 17.1 14.4 119
GRAVE SPRINGS 8550 10.4 10.5 99 11.2 11.0 102
HANSEN SAWMILL 8360 7.5 6.3 119 11.0 9.1 121
MIDDLE POWDER 7760 12.8 13.6 94 11.1 13.5 82
POWDER RIVER PASS 9480 13.4 11.8 114 15.7 13.5 116
SUCKER CREEK 8880 16.5 13.2 125 18.8 14.9 126
TIE CREEK 6870 7.5 5.5 136 16.0 11.1 144
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Basin wide percent of average 113 116
BELLE FOURCHE
BLIND PARK 6890 6.8 8.0 85 15.6 12.0 130
COLE CANYON 5910 7.3 7.2 101 13.4 7.4 181
NORTH RAPID CREEK 6130 10.1 8.9 113 15.1 9.3 162
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Basin wide percent of average 100 154
UPPER N. PLATTE RIVER
COLUMBINE 9160 27.4 24.9 110 29.2 26.8 109
DIVIDE PEAK 8880 27.6 20.8 133 29.2 22.1 132
ELK RIVER 8700 24.0 20.0 120 23.7 20.9 113
JOE WRIGHT 10120 24.6 23.2 106 30.1 26.7 113
NORTH FRENCH CREEK 10130 37.4 32.0 117 34.5 26.4 131
OLD BATTLE 10000 37.9 34.2 111 41.2 36.6 113
SAGE CREEK BASIN 7850 15.5 12.1 128 16.6 12.8 130
SOUTH BRUSH CREEK 8440 14.1 13.4 105 19.1 17.7 108
TOWER 10500 47.6 48.8 98 44.9 41.0 110
WEBBER SPRINGS 9250 28.4 26.2 108 32.6 28.5 114
WILLOW CREEK PASS 9540 14.2 13.3 107 13.7 13.9 99
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Basin wide percent of average 111 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.6 25.9 99 23.8 23.9 100
CASPER MTN. 7900 14.4 16.3 88 15.1 16.2 93
DEADMAN HILL 10220 18.4 17.9 103 18.7 18.3 102
DEER PARK 9700 14.0 17.0 82 19.0 23.7 80
LAPRELE CREEK 8375 9.6 10.6 91 14.2 13.9 102
RENO HILL 8400 17.2 15.7 110 18.7 16.8 111
ROACH 9700 17.5 18.3 96 20.1 20.0 101
SAND LAKE 10050 33.9 34.6 98 31.8 26.0 122
SOUTH PASS 9040 14.9 17.7 84 16.7 20.0 84
WINDY PEAK 7900 9.4 8.3 113 11.5 11.5 100
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Basin wide percent of average 96 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.4 9.3 198 19.9 16.9 118
DIVIDE PEAK 8880 27.6 20.8 133 29.2 22.1 132
OLD BATTLE 10000 37.9 34.2 111 41.2 36.6 113
SANDSTONE RS 8150 21.8 13.8 158 22.7 19.9 114
WHISKEY PARK 8950 35.4 30.7 115 37.2 30.5 122
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Basin wide percent of average 130 119
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.5 15.3 88 13.5 14.3 94
BLIND BULL SUM 8650 28.5 28.9 99 20.8 23.6 88
EAST RIM DIVIDE 7930 10.8 13.9 78 12.7 12.8 99
ELKHART PARK G.S. 9400 14.5 14.0 104 15.8 14.3 110
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.3 13.8 118
GUNSIGHT PASS 9820 15.8 -M * 17.0 -M *
KENDALL R.S. 7740 11.4 13.9 82 14.3 15.4 93
LOOMIS PARK 8240 17.0 17.3 98 19.5 18.4 106
NEW FORK LAKE 8340 12.7 11.5 110 11.7 12.1 97
SNIDER BASIN 8060 15.0 15.0 100 15.6 17.2 91
SPRING CREEK DIVIDE 9000 29.3 28.3 104 28.0 28.1 100
TRIPLE PEAK 8500 24.9 25.9 96 27.5 26.4 104
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Basin wide percent of average 97 100
LOWER GREEN RIVER
HAMS FORK 7840 11.8 10.5 112 12.6 13.1 96
HEWINTA 9519 13.6 12.5 109 15.0 15.9 94
HICKERSON PARK 9145 7.1 8.4 85 10.7 8.7 123
HOLE-IN-ROCK 9150 7.2 7.4 97 10.0 8.3 120
INDIAN CREEK 9425 26.6 29.5 90 23.7 27.2 87
KELLEY R.S. 8180 17.3 17.4 99 19.2 21.7 88
STEEL CREEK PARK 10200 14.8 17.0 87 18.1 17.9 101
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Basin wide percent of average 96 97
UPPER BEAR RIVER
BUG LAKE 7950 20.3 21.8 93 19.2 20.5 94
HAYDEN FORK 9212 18.3 16.8 109 23.6 22.7 104
KELLEY R.S. 8180 17.3 17.4 99 19.2 21.7 88
LILY LAKE 9156 16.7 14.6 114 18.4 19.0 97
MONTE CRISTO 8960 29.6 30.6 97 28.4 27.3 104
SALT RIVER SUMMIT 7760 15.4 14.7 105 17.2 20.0 86
TRIAL LAKE 9992 26.1 26.2 100 24.6 26.7 92
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Basin wide percent of average 101 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.