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: MAY 4 , 2008
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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 17.8 11.1 160 30.4 24.6 124
COTTONWOOD CREEK 7670 24.9 18.7 133 28.3 32.4 87
GRAND TARGHEE 9260 55.0 -M * 38.4 -M *
GRANITE CREEK 6770 15.5 11.9 130 24.9 22.6 110
GRASSY LAKE 7265 38.0 32.2 118 47.8 41.3 116
GROS VENTRE SUMMIT 8750 13.6 12.7 107 16.0 15.5 103
GUNSIGHT PASS 9820 13.6 -M * 16.9 -M *
LEWIS LAKE DIVIDE 7850 39.9 33.7 118 41.0 42.0 98
PHILLIPS BENCH 8200 35.1 28.6 123 38.5 33.5 115
SALT RIVER SUMMIT 7760 12.5 9.6 130 18.0 21.9 82
SNAKE RIVER STATION 6920 17.6 10.9 161 30.3 25.8 117
SPRING CREEK DIVIDE 9000 24.0 28.1 85 26.5 30.5 87
THUMB DIVIDE 7980 16.8 13.9 121 23.1 22.3 104
TOGWOTEE PASS 9580 30.5 28.1 109 33.7 29.4 115
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 *
WILLOW CREEK 8380 32.4 29.8 109 43.7 38.2 114
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Basin wide percent of average 118 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 28.0 26.0 108 26.7 23.9 112
BLACK BEAR 8170 47.8 39.4 121 47.5 46.3 103
CANYON 7870 18.1 10.4 174 23.3 18.0 129
FISHER CREEK 9100 44.6 37.7 118 43.1 42.4 102
MADISON PLATEAU 7750 32.9 23.4 141 35.9 30.8 117
NORTHEAST ENTRANCE 7350 8.4 6.1 138 15.4 15.1 102
PARKER PEAK 9400 31.5 24.5 129 -M 19.9 *
SYLVAN LAKE 8420 22.1 23.2 95 29.9 25.1 119
THUMB DIVIDE 7980 16.8 13.9 121 23.1 22.3 104
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.5 *
WHISKEY CREEK 6800 20.5 14.1 145 27.7 24.5 113
WHITE MILL 8700 31.2 26.2 119 30.9 31.6 98
WOLVERINE 7650 8.4 6.3 133 15.5 15.5 100
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Basin wide percent of average 124 108
WIND RIVER
BURROUGHS CREEK 8750 16.8 12.9 130 20.7 19.6 106
COLD SPRINGS 9630 4.0 4.6 87 12.0 14.3 84
DEER PARK 9700 16.4 17.6 93 23.2 27.4 85
HOBBS PARK 10100 16.1 17.9 90 18.5 17.4 106
LITTLE WARM 9370 10.2 10.3 99 16.1 17.2 94
SOUTH PASS 9040 14.7 17.4 84 20.2 23.1 87
ST. LAWRENCE ALT 8620 4.9 5.6 88 10.1 12.4 81
TOGWOTEE PASS 9580 30.5 28.1 109 33.7 29.4 115
TOWNSEND CREEK 8700 8.7 8.3 105 14.9 15.9 94
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Basin wide percent of average 100 96
BIGHORN BASIN
BALD MTN. 9380 20.1 23.4 86 18.6 21.8 85
BEAR TRAP MEADOW 8200 7.4 2.0 370 11.7 11.2 104
BLACKWATER 9780 29.9 29.1 103 27.4 25.1 109
BONE SPRINGS DIV 9350 21.9 18.1 121 21.3 18.7 114
EVENING STAR 9200 33.0 33.2 99 38.3 30.4 126
GRAVE SPRINGS 8550 12.1 10.7 113 13.2 13.5 98
KIRWIN 9550 13.8 12.8 108 16.7 14.6 114
MARQUETTE 8760 9.4 10.9 86 12.6 14.1 89
MIDDLE POWDER 7760 15.3 13.8 111 12.5 16.2 77
OWL CREEK 8975 1.1 3.6 31 8.5 8.5 100
POWDER RIVER PASS 9480 13.3 10.1 132 17.3 16.2 107
SHELL CREEK 9580 19.1 16.6 115 19.0 17.2 110
SYLVAN LAKE 8420 22.1 23.2 95 29.9 25.1 119
SYLVAN ROAD 7120 9.9 7.3 136 23.3 20.8 112
TIMBER CREEK 7950 4.9 4.6 107 10.4 10.9 95
YOUNTS PEAK 8350 18.6 18.0 103 19.7 19.1 103
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Basin wide percent of average 106 106
SHOSHONE RIVER
BLACKWATER 9780 29.9 29.1 103 27.4 25.1 109
EVENING STAR 9200 33.0 33.2 99 38.3 30.4 126
KIRWIN 9550 13.8 12.8 108 16.7 14.6 114
MARQUETTE 8760 9.4 10.9 86 12.6 14.1 89
SYLVAN LAKE 8420 22.1 23.2 95 29.9 25.1 119
SYLVAN ROAD 7120 9.9 7.3 136 23.3 20.8 112
YOUNTS PEAK 8350 18.6 18.0 103 19.7 19.1 103
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Basin wide percent of average 102 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.4 2.0 370 11.7 11.2 104
BIG GOOSE 7990 11.2 11.1 101 16.2 13.4 121
BONE SPRINGS DIV 9350 21.9 18.1 121 21.3 18.7 114
BURGESS JUNCTION 7880 16.8 12.8 131 18.5 15.8 117
CLOUD PEAK RESERVOIR 9860 19.2 16.1 119 19.8 17.6 112
DOME LAKE 8880 13.3 12.9 103 19.4 17.2 113
GRAVE SPRINGS 8550 12.1 10.7 113 13.2 13.5 98
HANSEN SAWMILL 8360 5.0 4.4 114 11.6 11.3 103
MIDDLE POWDER 7760 15.3 13.8 111 12.5 16.2 77
POWDER RIVER PASS 9480 13.3 10.1 132 17.3 16.2 107
SUCKER CREEK 8880 17.7 12.5 142 21.8 17.9 122
TIE CREEK 6870 7.8 3.6 217 15.6 13.9 112
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Basin wide percent of average 126 109
BELLE FOURCHE
BLIND PARK 6890 5.6 3.7 151 15.0 14.6 103
COLE CANYON 5910 7.2 3.6 200 12.1 9.9 122
NORTH RAPID CREEK 6130 9.7 2.7 359 14.0 11.7 120
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Basin wide percent of average 225 114
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.2 19.6 134 33.0 29.5 112
DIVIDE PEAK 8880 23.9 18.3 131 27.6 24.6 112
ELK RIVER 8700 21.4 13.5 159 26.9 23.4 115
JOE WRIGHT 10120 28.6 25.1 114 34.2 30.6 112
NORTH FRENCH CREEK 10130 34.3 34.5 99 35.3 30.2 117
OLD BATTLE 10000 38.6 37.2 104 45.8 40.4 113
SAGE CREEK BASIN 7850 14.3 10.6 135 19.8 14.3 138
SOUTH BRUSH CREEK 8440 10.7 10.2 105 20.4 20.5 100
TOWER 10500 49.8 52.4 95 47.9 45.8 105
WEBBER SPRINGS 9250 28.3 24.1 117 36.2 31.6 115
WILLOW CREEK PASS 9540 21.3 13.9 153 19.7 16.0 123
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Basin wide percent of average 115 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.3 27.8 84 26.8 27.5 97
CASPER MTN. 7900 16.8 16.4 102 19.1 20.1 95
DEADMAN HILL 10220 21.3 19.7 108 23.7 21.4 111
DEER PARK 9700 16.4 17.6 93 23.2 27.4 85
LAPRELE CREEK 8375 7.4 6.4 116 15.5 16.9 92
RENO HILL 8400 18.1 13.9 130 23.6 20.8 113
ROACH 9700 21.0 17.9 117 26.7 22.9 117
SAND LAKE 10050 33.9 37.0 92 35.4 29.9 118
SOUTH PASS 9040 14.7 17.4 84 20.2 23.1 87
WINDY PEAK 7900 7.7 4.2 183 13.4 13.9 96
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Basin wide percent of average 101 102
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 8.4 3.7 227 19.6 18.9 104
DIVIDE PEAK 8880 23.9 18.3 131 27.6 24.6 112
OLD BATTLE 10000 38.6 37.2 104 45.8 40.4 113
SANDSTONE RS 8150 15.4 8.3 186 24.6 22.2 111
WHISKEY PARK 8950 38.8 30.1 129 41.2 34.4 120
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Basin wide percent of average 128 113
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.6 12.7 99 15.1 16.2 93
BLIND BULL SUM 8650 27.4 27.4 100 19.7 25.5 77
EAST RIM DIVIDE 7930 8.1 12.6 64 12.5 14.1 89
ELKHART PARK G.S. 9400 11.1 12.3 90 13.2 16.3 81
GROS VENTRE SUMMIT 8750 13.6 12.7 107 16.0 15.5 103
GUNSIGHT PASS 9820 13.6 -M * 16.9 -M *
KENDALL R.S. 7740 9.1 8.8 103 15.2 16.8 90
LOOMIS PARK 8240 13.4 13.5 99 19.9 20.2 99
NEW FORK LAKE 8340 7.2 7.6 95 10.6 13.6 78
SNIDER BASIN 8060 11.6 11.8 98 15.8 18.7 84
SPRING CREEK DIVIDE 9000 24.0 28.1 85 26.5 30.5 87
TRIPLE PEAK 8500 23.8 22.7 105 32.0 29.0 110
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Basin wide percent of average 95 91
LOWER GREEN RIVER
HAMS FORK 7840 9.0 5.0 180 11.9 15.0 79
HEWINTA 9519 11.4 8.3 137 19.4 18.1 107
HICKERSON PARK 9145 3.7 4.9 76 11.1 10.5 106
HOLE-IN-ROCK 9150 3.6 4.1 88 11.8 10.0 118
INDIAN CREEK 9425 26.9 27.6 97 -M 29.8 *
KELLEY R.S. 8180 14.6 13.2 111 20.0 23.9 84
STEEL CREEK PARK 10200 19.7 18.9 104 21.6 20.6 105
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Basin wide percent of average 108 98
UPPER BEAR RIVER
BUG LAKE 7950 17.8 16.7 107 18.8 22.7 83
HAYDEN FORK 9212 15.2 11.9 128 26.2 25.5 103
KELLEY R.S. 8180 14.6 13.2 111 20.0 23.9 84
LILY LAKE 9156 13.9 10.2 136 20.5 21.4 96
MONTE CRISTO 8960 30.5 27.4 111 29.4 30.7 96
SALT RIVER SUMMIT 7760 12.5 9.6 130 18.0 21.9 82
TRIAL LAKE 9992 24.6 26.2 94 27.5 29.8 92
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Basin wide percent of average 112 91
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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.