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 SUNDAY: APRIL 5 , 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 16.2 18.1 90 19.8 21.9 90
COTTONWOOD CREEK 7670 28.0 24.3 115 31.4 28.2 111
GRAND TARGHEE 9260 44.3 -M * 34.5 -M *
GRANITE CREEK 6770 16.8 18.5 91 21.2 20.3 104
GRASSY LAKE 7265 33.0 36.6 90 35.2 36.9 95
GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119
GUNSIGHT PASS 9820 15.3 -M * 16.2 -M *
LEWIS LAKE DIVIDE 7850 31.7 36.2 88 33.7 37.7 89
PHILLIPS BENCH 8200 28.6 29.6 97 29.7 29.8 100
SALT RIVER SUMMIT 7760 15.6 14.8 105 16.8 19.3 87
SNAKE RIVER STATION 6920 17.7 19.1 93 22.7 22.8 100
SPRING CREEK DIVIDE 9000 28.2 27.3 103 27.3 27.1 101
THUMB DIVIDE 7980 20.8 19.3 108 21.5 19.4 111
TOGWOTEE PASS 9580 28.1 25.5 110 30.4 25.3 120
TWO OCEAN PLATEAU 9240 38.6 28.9 134 30.0 28.4 106
WILLOW CREEK 8380 35.6 31.0 115 39.9 33.0 121
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Basin wide percent of average 103 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 23.5 24.0 98 21.6 20.6 105
BLACK BEAR 8170 38.0 40.1 95 -M 41.4 *
CANYON 7870 14.0 14.0 100 15.2 15.8 96
FISHER CREEK 9100 37.4 35.8 104 36.1 37.3 97
MADISON PLATEAU 7750 23.5 25.7 91 25.0 27.5 91
NORTHEAST ENTRANCE 7350 11.3 11.3 100 13.9 13.0 107
PARKER PEAK 9400 27.0 22.2 122 -M 16.7 *
SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111
THUMB DIVIDE 7980 20.8 19.3 108 21.5 19.4 111
TWO OCEAN PLATEAU 9240 38.6 28.9 134 30.0 28.4 106
WHISKEY CREEK 6800 17.4 17.6 99 20.8 21.5 97
WHITE MILL 8700 -M 24.9 * -M 27.7 *
WOLVERINE 7650 12.3 11.7 105 12.3 13.1 94
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Basin wide percent of average 104 101
WIND RIVER
BURROUGHS CREEK 8750 16.0 14.9 107 16.7 16.7 100
COLD SPRINGS 9630 8.4 8.9 94 10.8 11.0 98
DEER PARK 9700 13.6 17.3 79 18.3 22.5 81
HOBBS PARK 10100 15.3 15.6 98 15.2 13.2 115
LITTLE WARM 9370 12.4 12.2 102 15.1 13.8 109
SOUTH PASS 9040 14.4 17.1 84 14.8 18.9 78
ST. LAWRENCE ALT 8620 7.2 7.5 96 10.6 9.1 116
TOGWOTEE PASS 9580 28.1 25.5 110 30.4 25.3 120
TOWNSEND CREEK 8700 10.9 9.3 117 13.3 12.0 111
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Basin wide percent of average 98 102
BIGHORN BASIN
BALD MTN. 9380 20.1 20.3 99 15.8 17.8 89
BEAR TRAP MEADOW 8200 9.7 5.2 187 10.1 8.5 119
BLACKWATER 9780 26.1 25.2 104 23.5 21.1 111
BONE SPRINGS DIV 9350 18.5 16.7 111 14.9 15.0 99
EVENING STAR 9200 30.9 30.4 102 31.5 26.0 121
GRAVE SPRINGS 8550 10.3 9.8 105 10.9 10.0 109
KIRWIN 9550 13.4 11.7 115 14.7 11.5 128
MARQUETTE 8760 7.5 9.5 79 9.5 10.1 94
MIDDLE POWDER 7760 12.7 12.3 103 10.9 12.7 86
OWL CREEK 8975 5.6 5.8 97 5.7 6.1 93
POWDER RIVER PASS 9480 13.2 11.1 119 14.9 12.7 117
SHELL CREEK 9580 17.2 15.1 114 16.5 13.7 120
SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111
SYLVAN ROAD 7120 15.1 12.8 118 19.8 18.0 110
TIMBER CREEK 7950 4.8 5.9 81 8.6 7.6 113
YOUNTS PEAK 8350 18.2 17.5 104 16.1 16.6 97
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Basin wide percent of average 105 108
SHOSHONE RIVER
BLACKWATER 9780 26.1 25.2 104 23.5 21.1 111
EVENING STAR 9200 30.9 30.4 102 31.5 26.0 121
KIRWIN 9550 13.4 11.7 115 14.7 11.5 128
MARQUETTE 8760 7.5 9.5 79 9.5 10.1 94
SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111
SYLVAN ROAD 7120 15.1 12.8 118 19.8 18.0 110
YOUNTS PEAK 8350 18.2 17.5 104 16.1 16.6 97
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Basin wide percent of average 102 111
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.7 5.2 187 10.1 8.5 119
BIG GOOSE 7990 12.1 11.1 109 14.3 8.9 161
BONE SPRINGS DIV 9350 18.5 16.7 111 14.9 15.0 99
BURGESS JUNCTION 7880 13.8 12.0 115 14.2 12.5 114
CLOUD PEAK RESERVOIR 9860 19.1 13.9 137 17.5 13.2 133
DOME LAKE 8880 14.9 12.9 116 16.9 13.5 125
GRAVE SPRINGS 8550 10.3 9.8 105 10.9 10.0 109
HANSEN SAWMILL 8360 8.0 6.5 123 10.8 8.4 129
MIDDLE POWDER 7760 12.7 12.3 103 10.9 12.7 86
POWDER RIVER PASS 9480 13.2 11.1 119 14.9 12.7 117
SUCKER CREEK 8880 16.8 12.2 138 18.5 13.9 133
TIE CREEK 6870 8.3 6.2 134 -M 10.2 *
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Basin wide percent of average 121 119
BELLE FOURCHE
BLIND PARK 6890 6.6 8.4 79 15.2 11.3 135
COLE CANYON 5910 7.7 7.0 110 13.4 6.8 197
NORTH RAPID CREEK 6130 11.1 8.5 131 14.6 8.8 166
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Basin wide percent of average 106 161
UPPER N. PLATTE RIVER
COLUMBINE 9160 28.1 25.1 112 28.2 25.8 109
DIVIDE PEAK 8880 25.8 20.3 127 27.1 21.2 128
ELK RIVER 8700 23.5 19.9 118 22.8 20.0 114
JOE WRIGHT 10120 24.6 21.9 112 29.3 25.3 116
NORTH FRENCH CREEK 10130 35.8 30.2 119 32.7 25.2 130
OLD BATTLE 10000 34.9 32.9 106 40.4 35.3 114
SAGE CREEK BASIN 7850 14.6 11.8 124 14.9 12.3 121
SOUTH BRUSH CREEK 8440 13.6 13.3 102 17.6 16.8 105
TOWER 10500 46.4 46.7 99 43.4 39.2 111
WEBBER SPRINGS 9250 27.1 26.4 103 30.8 27.3 113
WILLOW CREEK PASS 9540 13.7 12.5 110 13.5 13.1 103
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Basin wide percent of average 110 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.8 24.5 101 23.0 22.6 102
CASPER MTN. 7900 14.5 15.1 96 14.4 14.8 97
DEADMAN HILL 10220 17.3 16.9 102 17.7 17.3 102
DEER PARK 9700 13.6 17.3 79 18.3 22.5 81
LAPRELE CREEK 8375 10.3 11.0 94 13.5 12.9 105
RENO HILL 8400 16.3 14.7 111 17.2 15.4 112
ROACH 9700 16.8 17.5 96 19.4 19.0 102
SAND LAKE 10050 32.3 33.3 97 29.4 24.7 119
SOUTH PASS 9040 14.4 17.1 84 14.8 18.9 78
WINDY PEAK 7900 10.0 8.3 120 11.3 10.8 105
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Basin wide percent of average 97 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.1 10.6 171 19.1 16.2 118
DIVIDE PEAK 8880 25.8 20.3 127 27.1 21.2 128
OLD BATTLE 10000 34.9 32.9 106 40.4 35.3 114
SANDSTONE RS 8150 19.8 14.6 136 21.2 19.1 111
WHISKEY PARK 8950 34.7 30.6 113 35.3 29.3 120
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Basin wide percent of average 122 118
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.6 14.9 85 12.5 13.7 91
BLIND BULL SUM 8650 27.2 28.6 95 20.2 22.8 89
EAST RIM DIVIDE 7930 10.6 13.5 79 12.3 12.3 100
ELKHART PARK G.S. 9400 13.3 13.7 97 14.5 13.7 106
GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119
GUNSIGHT PASS 9820 15.3 -M * 16.2 -M *
KENDALL R.S. 7740 11.8 14.5 81 14.1 14.9 95
LOOMIS PARK 8240 16.7 17.5 95 18.9 17.8 106
NEW FORK LAKE 8340 12.1 11.4 106 10.9 11.6 94
SNIDER BASIN 8060 15.0 14.9 101 15.3 16.5 93
SPRING CREEK DIVIDE 9000 28.2 27.3 103 27.3 27.1 101
TRIPLE PEAK 8500 25.1 25.5 98 26.9 25.4 106
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Basin wide percent of average 95 100
LOWER GREEN RIVER
HAMS FORK 7840 11.8 11.7 101 12.3 12.5 98
HEWINTA 9519 11.7 12.4 94 14.5 15.0 97
HICKERSON PARK 9145 6.1 7.9 77 9.2 8.2 112
HOLE-IN-ROCK 9150 6.6 7.3 90 9.4 7.7 122
INDIAN CREEK 9425 25.9 28.7 90 22.8 26.1 87
KELLEY R.S. 8180 17.1 17.3 99 18.8 20.9 90
STEEL CREEK PARK 10200 14.0 16.2 86 17.4 16.7 104
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Basin wide percent of average 92 97
UPPER BEAR RIVER
BUG LAKE 7950 20.1 21.5 93 18.7 19.7 95
HAYDEN FORK 9212 17.7 16.8 105 22.8 21.6 106
KELLEY R.S. 8180 17.1 17.3 99 18.8 20.9 90
LILY LAKE 9156 15.7 14.0 112 17.8 18.0 99
MONTE CRISTO 8960 28.6 30.3 94 27.5 26.2 105
SALT RIVER SUMMIT 7760 15.6 14.8 105 16.8 19.3 87
TRIAL LAKE 9992 24.8 25.6 97 23.4 25.6 91
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Basin wide percent of average 100 96
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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.