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 28 , 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 13.3 * -M 24.1 *
COTTONWOOD CREEK 7670 26.7 20.7 129 28.1 31.5 89
GRAND TARGHEE 9260 54.6 -M * 38.0 -M *
GRANITE CREEK 6770 18.1 13.8 131 24.9 22.1 113
GRASSY LAKE 7265 40.2 34.4 117 47.5 40.5 117
GROS VENTRE SUMMIT 8750 13.6 13.7 99 15.7 15.0 105
GUNSIGHT PASS 9820 13.0 -M * 16.5 -M *
LEWIS LAKE DIVIDE 7850 40.2 35.3 114 40.9 41.2 99
PHILLIPS BENCH 8200 36.6 30.0 122 38.4 32.7 117
SALT RIVER SUMMIT 7760 13.2 11.6 114 17.8 21.4 83
SNAKE RIVER STATION 6920 20.9 13.4 156 30.2 25.2 120
SPRING CREEK DIVIDE 9000 23.6 28.8 82 26.4 29.9 88
THUMB DIVIDE 7980 19.7 15.9 124 23.0 21.7 106
TOGWOTEE PASS 9580 30.2 27.8 109 33.2 28.6 116
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.7 *
WILLOW CREEK 8380 34.8 31.2 112 43.0 37.1 116
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Basin wide percent of average 115 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 28.0 25.9 108 26.5 23.2 114
BLACK BEAR 8170 47.7 40.5 118 47.0 45.4 104
CANYON 7870 18.8 11.9 158 22.9 17.5 131
FISHER CREEK 9100 44.9 37.8 119 42.5 41.4 103
MADISON PLATEAU 7750 33.5 24.9 135 35.4 30.1 118
NORTHEAST ENTRANCE 7350 10.3 7.8 132 15.1 14.6 103
PARKER PEAK 9400 30.6 24.4 125 -M 19.2 *
SYLVAN LAKE 8420 23.6 24.0 98 29.5 24.3 121
THUMB DIVIDE 7980 19.7 15.9 124 23.0 21.7 106
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.7 *
WHISKEY CREEK 6800 20.5 15.9 129 27.4 23.9 115
WHITE MILL 8700 30.7 26.4 116 30.6 30.8 99
WOLVERINE 7650 10.2 7.8 131 15.6 14.9 105
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Basin wide percent of average 121 110
WIND RIVER
BURROUGHS CREEK 8750 17.1 14.1 121 20.6 19.0 108
COLD SPRINGS 9630 5.4 4.8 113 11.5 13.6 85
DEER PARK 9700 16.8 19.1 88 22.5 26.5 85
HOBBS PARK 10100 15.9 18.0 88 17.2 16.5 104
LITTLE WARM 9370 10.8 11.5 94 15.7 16.4 96
SOUTH PASS 9040 15.4 18.2 85 19.6 22.2 88
ST. LAWRENCE ALT 8620 6.2 6.4 97 9.4 11.7 80
TOGWOTEE PASS 9580 30.2 27.8 109 33.2 28.6 116
TOWNSEND CREEK 8700 9.5 9.6 99 14.1 15.1 93
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Basin wide percent of average 98 97
BIGHORN BASIN
BALD MTN. 9380 18.8 23.4 80 17.6 20.9 84
BEAR TRAP MEADOW 8200 7.7 2.8 275 10.7 10.6 101
BLACKWATER 9780 29.4 28.4 104 26.9 24.3 111
BONE SPRINGS DIV 9350 20.0 18.2 110 19.9 17.9 111
EVENING STAR 9200 33.5 33.0 102 37.8 29.5 128
GRAVE SPRINGS 8550 11.1 11.0 101 12.0 12.8 94
KIRWIN 9550 14.1 13.0 108 16.4 13.9 118
MARQUETTE 8760 9.2 11.1 83 11.9 13.3 89
MIDDLE POWDER 7760 14.1 14.6 97 11.2 15.4 73
OWL CREEK 8975 3.5 4.0 88 8.2 7.9 104
POWDER RIVER PASS 9480 13.4 11.1 121 16.6 15.4 108
SHELL CREEK 9580 18.4 16.8 110 17.9 16.4 109
SYLVAN LAKE 8420 23.6 24.0 98 29.5 24.3 121
SYLVAN ROAD 7120 12.5 8.9 140 23.3 20.2 115
TIMBER CREEK 7950 5.3 4.9 108 9.6 10.1 95
YOUNTS PEAK 8350 18.8 18.2 103 19.6 18.5 106
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Basin wide percent of average 104 107
SHOSHONE RIVER
BLACKWATER 9780 29.4 28.4 104 26.9 24.3 111
EVENING STAR 9200 33.5 33.0 102 37.8 29.5 128
KIRWIN 9550 14.1 13.0 108 16.4 13.9 118
MARQUETTE 8760 9.2 11.1 83 11.9 13.3 89
SYLVAN LAKE 8420 23.6 24.0 98 29.5 24.3 121
SYLVAN ROAD 7120 12.5 8.9 140 23.3 20.2 115
YOUNTS PEAK 8350 18.8 18.2 103 19.6 18.5 106
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Basin wide percent of average 103 115
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.7 2.8 275 10.7 10.6 101
BIG GOOSE 7990 10.6 12.0 88 14.7 12.5 118
BONE SPRINGS DIV 9350 20.0 18.2 110 19.9 17.9 111
BURGESS JUNCTION 7880 15.0 13.4 112 16.5 15.1 109
CLOUD PEAK RESERVOIR 9860 18.0 16.3 110 18.2 16.6 110
DOME LAKE 8880 13.1 13.8 95 17.8 16.4 109
GRAVE SPRINGS 8550 11.1 11.0 101 12.0 12.8 94
HANSEN SAWMILL 8360 5.7 5.1 112 10.9 10.7 102
MIDDLE POWDER 7760 14.1 14.6 97 11.2 15.4 73
POWDER RIVER PASS 9480 13.4 11.1 121 16.6 15.4 108
SUCKER CREEK 8880 16.6 13.4 124 19.7 17.0 116
TIE CREEK 6870 7.7 4.5 171 14.0 13.1 107
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Basin wide percent of average 112 105
BELLE FOURCHE
BLIND PARK 6890 5.7 4.8 119 13.0 13.8 94
COLE CANYON 5910 5.9 5.6 105 9.7 9.1 107
NORTH RAPID CREEK 6130 8.3 5.1 163 11.3 11.0 103
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Basin wide percent of average 128 100
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.9 22.0 122 31.9 28.8 111
DIVIDE PEAK 8880 24.1 20.0 120 26.6 23.9 111
ELK RIVER 8700 23.7 16.2 146 26.0 22.7 115
JOE WRIGHT 10120 27.4 25.0 110 32.2 29.5 109
NORTH FRENCH CREEK 10130 34.2 34.3 100 34.3 29.1 118
OLD BATTLE 10000 38.1 36.5 104 44.9 39.4 114
SAGE CREEK BASIN 7850 16.9 11.6 146 19.3 13.9 139
SOUTH BRUSH CREEK 8440 13.2 11.7 113 19.6 19.7 99
TOWER 10500 48.7 51.9 94 46.8 44.5 105
WEBBER SPRINGS 9250 29.6 25.6 116 35.1 30.7 114
WILLOW CREEK PASS 9540 20.8 14.3 145 19.0 15.4 123
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Basin wide percent of average 113 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.1 28.3 85 26.2 26.5 99
CASPER MTN. 7900 14.9 17.5 85 17.5 19.0 92
DEADMAN HILL 10220 20.9 19.5 107 22.6 20.5 110
DEER PARK 9700 16.8 19.1 88 22.5 26.5 85
LAPRELE CREEK 8375 7.6 7.8 97 14.1 16.0 88
RENO HILL 8400 15.6 15.3 102 20.2 19.7 103
ROACH 9700 20.9 18.7 112 25.4 22.0 115
SAND LAKE 10050 33.2 36.8 90 34.2 28.8 119
SOUTH PASS 9040 15.4 18.2 85 19.6 22.2 88
WINDY PEAK 7900 8.4 5.7 147 12.2 13.2 92
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Basin wide percent of average 95 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.0 5.4 204 18.7 18.3 102
DIVIDE PEAK 8880 24.1 20.0 120 26.6 23.9 111
OLD BATTLE 10000 38.1 36.5 104 44.9 39.4 114
SANDSTONE RS 8150 17.1 10.5 163 23.9 21.6 111
WHISKEY PARK 8950 39.2 30.7 128 40.2 33.3 121
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Basin wide percent of average 126 113
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.6 14.1 96 14.9 15.6 96
BLIND BULL SUM 8650 28.6 28.2 101 19.5 24.9 78
EAST RIM DIVIDE 7930 9.7 13.6 71 12.4 13.7 91
ELKHART PARK G.S. 9400 11.6 13.3 87 13.1 15.7 83
GROS VENTRE SUMMIT 8750 13.6 13.7 99 15.7 15.0 105
GUNSIGHT PASS 9820 13.0 -M * 16.5 -M *
KENDALL R.S. 7740 11.2 10.9 103 15.3 16.4 93
LOOMIS PARK 8240 15.9 15.0 106 19.8 19.7 101
NEW FORK LAKE 8340 9.3 9.2 101 10.5 13.2 80
SNIDER BASIN 8060 13.6 13.3 102 15.8 18.3 86
SPRING CREEK DIVIDE 9000 23.6 28.8 82 26.4 29.9 88
TRIPLE PEAK 8500 25.9 24.5 106 31.8 28.3 112
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Basin wide percent of average 96 93
LOWER GREEN RIVER
HAMS FORK 7840 11.5 6.9 167 11.8 14.5 81
HEWINTA 9519 15.2 10.1 150 19.1 17.5 109
HICKERSON PARK 9145 5.6 6.4 87 11.1 10.0 111
HOLE-IN-ROCK 9150 5.8 5.4 107 11.8 9.5 124
INDIAN CREEK 9425 28.1 28.9 97 -M 29.1 *
KELLEY R.S. 8180 16.2 14.9 109 19.8 23.3 85
STEEL CREEK PARK 10200 19.0 18.4 103 21.2 19.9 107
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Basin wide percent of average 111 100
UPPER BEAR RIVER
BUG LAKE 7950 18.6 19.1 97 18.7 22.1 85
HAYDEN FORK 9212 17.5 13.9 126 25.9 24.8 104
KELLEY R.S. 8180 16.2 14.9 109 19.8 23.3 85
LILY LAKE 9156 15.9 12.0 132 20.1 20.8 97
MONTE CRISTO 8960 32.7 29.0 113 29.2 29.8 98
SALT RIVER SUMMIT 7760 13.2 11.6 114 17.8 21.4 83
TRIAL LAKE 9992 25.2 26.6 95 27.2 29.0 94
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Basin wide percent of average 110 93
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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.