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 TUESDAY: APRIL 15 , 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 -M 16.8 * -M 22.9 *
COTTONWOOD CREEK 7670 26.8 23.8 113 26.9 29.8 90
GRAND TARGHEE 9260 51.5 -M * 35.8 -M *
GRANITE CREEK 6770 19.1 17.0 112 24.5 21.1 116
GRASSY LAKE 7265 38.2 37.0 103 44.9 38.5 117
GROS VENTRE SUMMIT 8750 13.2 14.6 90 15.1 14.0 108
GUNSIGHT PASS 9820 13.1 -M * 15.4 -M *
LEWIS LAKE DIVIDE 7850 37.7 36.7 103 39.9 39.4 101
PHILLIPS BENCH 8200 35.6 30.6 116 37.2 31.2 119
SALT RIVER SUMMIT 7760 13.2 14.4 92 17.1 20.3 84
SNAKE RIVER STATION 6920 20.7 17.5 118 29.0 24.0 121
SPRING CREEK DIVIDE 9000 23.8 28.5 84 25.5 28.5 89
THUMB DIVIDE 7980 18.0 18.7 96 22.1 20.5 108
TOGWOTEE PASS 9580 28.7 26.7 107 31.4 26.8 117
TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 *
WILLOW CREEK 8380 34.3 31.9 108 40.8 34.9 117
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Basin wide percent of average 104 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.0 25.5 106 25.6 21.8 117
BLACK BEAR 8170 47.0 40.9 115 44.5 43.3 103
CANYON 7870 18.1 13.9 130 22.0 16.6 133
FISHER CREEK 9100 43.3 37.0 117 40.5 39.2 103
MADISON PLATEAU 7750 32.1 26.1 123 33.4 28.9 116
NORTHEAST ENTRANCE 7350 -M 10.7 * -M 13.7 *
PARKER PEAK 9400 29.0 23.4 124 25.8 17.8 145
SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123
THUMB DIVIDE 7980 18.0 18.7 96 22.1 20.5 108
TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 *
WHISKEY CREEK 6800 18.8 17.8 106 25.9 22.6 115
WHITE MILL 8700 29.5 26.0 113 -M 29.1 *
WOLVERINE 7650 10.3 11.0 94 15.2 13.9 109
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Basin wide percent of average 112 114
WIND RIVER
BURROUGHS CREEK 8750 16.7 15.1 111 19.9 17.7 112
COLD SPRINGS 9630 7.2 7.1 101 11.0 12.1 91
DEER PARK 9700 16.6 17.1 97 21.7 24.1 90
HOBBS PARK 10100 15.3 16.8 91 15.7 14.7 107
LITTLE WARM 9370 10.4 12.5 83 14.9 14.9 100
SOUTH PASS 9040 15.5 17.7 88 18.7 20.4 92
ST. LAWRENCE ALT 8620 6.9 7.3 95 9.1 10.2 89
TOGWOTEE PASS 9580 28.7 26.7 107 31.4 26.8 117
TOWNSEND CREEK 8700 9.4 9.8 96 13.1 13.4 98
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Basin wide percent of average 97 101
BIGHORN BASIN
BALD MTN. 9380 17.8 21.9 81 16.8 19.1 88
BEAR TRAP MEADOW 8200 9.2 4.7 196 9.9 9.4 105
BLACKWATER 9780 27.9 26.9 104 25.6 22.6 113
BONE SPRINGS DIV 9350 19.1 17.7 108 19.0 16.3 117
EVENING STAR 9200 32.6 32.0 102 36.2 27.6 131
GRAVE SPRINGS 8550 10.6 10.7 99 11.1 11.4 97
KIRWIN 9550 13.3 12.3 108 15.8 12.5 126
MARQUETTE 8760 8.2 10.6 77 11.2 11.4 98
MIDDLE POWDER 7760 12.3 14.0 88 10.0 13.9 72
OWL CREEK 8975 5.5 5.2 106 7.3 6.9 106
POWDER RIVER PASS 9480 12.4 11.9 104 15.4 13.8 112
SHELL CREEK 9580 17.0 16.1 106 16.5 14.9 111
SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123
SYLVAN ROAD 7120 13.1 12.1 108 22.7 19.0 119
TIMBER CREEK 7950 5.2 5.7 91 8.8 8.6 102
YOUNTS PEAK 8350 18.3 18.1 101 18.9 17.5 108
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Basin wide percent of average 100 110
SHOSHONE RIVER
BLACKWATER 9780 27.9 26.9 104 25.6 22.6 113
EVENING STAR 9200 32.6 32.0 102 36.2 27.6 131
KIRWIN 9550 13.3 12.3 108 15.8 12.5 126
MARQUETTE 8760 8.2 10.6 77 11.2 11.4 98
SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123
SYLVAN ROAD 7120 13.1 12.1 108 22.7 19.0 119
YOUNTS PEAK 8350 18.3 18.1 101 18.9 17.5 108
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Basin wide percent of average 100 119
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.2 4.7 196 9.9 9.4 105
BIG GOOSE 7990 10.4 12.4 84 13.7 10.6 129
BONE SPRINGS DIV 9350 19.1 17.7 108 19.0 16.3 117
BURGESS JUNCTION 7880 14.1 13.2 107 15.5 13.6 114
CLOUD PEAK RESERVOIR 9860 17.0 15.3 111 17.2 14.7 117
DOME LAKE 8880 12.9 14.0 92 16.5 14.8 111
GRAVE SPRINGS 8550 10.6 10.7 99 11.1 11.4 97
HANSEN SAWMILL 8360 7.4 6.2 119 10.4 9.3 112
MIDDLE POWDER 7760 12.3 14.0 88 10.0 13.9 72
POWDER RIVER PASS 9480 12.4 11.9 104 15.4 13.8 112
SUCKER CREEK 8880 16.1 13.5 119 18.7 15.2 123
TIE CREEK 6870 8.5 5.3 160 13.1 11.4 115
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Basin wide percent of average 108 110
BELLE FOURCHE
BLIND PARK 6890 9.2 7.6 121 12.7 12.3 103
COLE CANYON 5910 7.3 7.1 103 9.2 7.7 119
NORTH RAPID CREEK 6130 10.5 8.8 119 11.1 9.6 116
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Basin wide percent of average 115 111
UPPER N. PLATTE RIVER
COLUMBINE 9160 29.6 24.7 120 31.3 27.2 115
DIVIDE PEAK 8880 26.6 20.9 127 26.2 22.4 117
ELK RIVER 8700 29.8 19.6 152 25.6 21.2 121
JOE WRIGHT 10120 27.4 23.6 116 30.8 27.2 113
NORTH FRENCH CREEK 10130 35.5 32.6 109 33.0 26.9 123
OLD BATTLE 10000 38.0 34.7 110 43.7 37.2 117
SAGE CREEK BASIN 7850 20.0 12.1 165 19.0 13.0 146
SOUTH BRUSH CREEK 8440 16.4 13.3 123 19.1 18.1 106
TOWER 10500 48.3 49.5 98 -M 41.7 *
WEBBER SPRINGS 9250 30.6 26.1 117 34.1 28.9 118
WILLOW CREEK PASS 9540 19.5 13.6 143 18.5 14.1 131
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Basin wide percent of average 119 119
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.4 26.5 92 25.0 24.4 102
CASPER MTN. 7900 16.0 16.8 95 16.1 16.7 96
DEADMAN HILL 10220 20.7 18.3 113 21.7 18.7 116
DEER PARK 9700 16.6 17.1 97 21.7 24.1 90
LAPRELE CREEK 8375 9.3 10.2 91 13.3 14.2 94
RENO HILL 8400 16.0 15.9 101 18.5 17.3 107
ROACH 9700 22.0 18.4 120 24.6 20.4 121
SAND LAKE 10050 33.4 35.0 95 32.9 26.5 124
SOUTH PASS 9040 15.5 17.7 88 18.7 20.4 92
WINDY PEAK 7900 10.1 8.0 126 11.7 11.8 99
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Basin wide percent of average 100 105
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 17.0 8.7 195 18.4 17.2 107
DIVIDE PEAK 8880 26.6 20.9 127 26.2 22.4 117
OLD BATTLE 10000 38.0 34.7 110 43.7 37.2 117
SANDSTONE RS 8150 19.9 13.4 149 23.8 20.1 118
WHISKEY PARK 8950 39.6 30.7 129 39.0 31.0 126
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Basin wide percent of average 130 118
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.6 15.3 89 14.4 14.5 99
BLIND BULL SUM 8650 27.7 28.9 96 19.2 23.8 81
EAST RIM DIVIDE 7930 9.4 14.0 67 12.1 12.9 94
ELKHART PARK G.S. 9400 11.7 14.0 84 12.7 14.5 88
GROS VENTRE SUMMIT 8750 13.2 14.6 90 15.1 14.0 108
GUNSIGHT PASS 9820 13.1 -M * 15.4 -M *
KENDALL R.S. 7740 12.1 13.6 89 15.0 15.5 97
LOOMIS PARK 8240 16.5 17.1 96 19.0 18.7 102
NEW FORK LAKE 8340 9.8 11.3 87 10.3 12.3 84
SNIDER BASIN 8060 14.0 14.9 94 15.5 17.5 89
SPRING CREEK DIVIDE 9000 23.8 28.5 84 25.5 28.5 89
TRIPLE PEAK 8500 26.3 25.9 102 30.6 26.7 115
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Basin wide percent of average 90 95
LOWER GREEN RIVER
HAMS FORK 7840 12.8 10.0 128 11.2 13.4 84
HEWINTA 9519 17.5 12.3 142 18.7 16.2 115
HICKERSON PARK 9145 8.5 8.3 102 11.3 8.9 127
HOLE-IN-ROCK 9150 6.7 7.3 92 11.7 8.5 138
INDIAN CREEK 9425 27.4 29.6 93 -M 27.6 *
KELLEY R.S. 8180 15.5 17.2 90 19.2 22.0 87
STEEL CREEK PARK 10200 18.3 17.3 106 20.7 18.3 113
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Basin wide percent of average 105 106
UPPER BEAR RIVER
BUG LAKE 7950 18.6 21.7 86 18.1 20.8 87
HAYDEN FORK 9212 21.1 16.5 128 25.2 23.1 109
KELLEY R.S. 8180 15.5 17.2 90 19.2 22.0 87
LILY LAKE 9156 16.9 14.5 117 19.7 19.4 102
MONTE CRISTO 8960 31.4 30.6 103 28.1 27.8 101
SALT RIVER SUMMIT 7760 13.2 14.4 92 17.1 20.3 84
TRIAL LAKE 9992 24.5 26.4 93 26.4 27.2 97
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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.