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 SATURDAY: APRIL 19 , 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 15.9 * -M 23.3 *
COTTONWOOD CREEK 7670 26.8 23.1 116 27.1 30.3 89
GRAND TARGHEE 9260 52.3 -M * 36.6 -M *
GRANITE CREEK 6770 18.7 16.1 116 24.5 21.4 114
GRASSY LAKE 7265 38.3 36.6 105 45.3 39.1 116
GROS VENTRE SUMMIT 8750 13.3 14.5 92 15.0 14.3 105
GUNSIGHT PASS 9820 12.7 -M * 15.4 -M *
LEWIS LAKE DIVIDE 7850 38.0 36.5 104 40.0 40.0 100
PHILLIPS BENCH 8200 36.2 30.7 118 37.4 31.6 118
SALT RIVER SUMMIT 7760 13.4 13.8 97 17.2 20.6 83
SNAKE RIVER STATION 6920 20.6 16.5 125 29.1 24.4 119
SPRING CREEK DIVIDE 9000 23.0 28.8 80 25.5 28.9 88
THUMB DIVIDE 7980 19.2 18.0 107 22.3 20.8 107
TOGWOTEE PASS 9580 29.2 27.1 108 31.7 27.3 116
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 *
WILLOW CREEK 8380 34.2 31.9 107 41.1 35.6 115
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Basin wide percent of average 106 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.2 25.6 106 25.6 22.2 115
BLACK BEAR 8170 -M 40.9 * 44.9 44.0 102
CANYON 7870 18.4 13.3 138 22.1 16.9 131
FISHER CREEK 9100 43.6 37.3 117 40.6 39.8 102
MADISON PLATEAU 7750 31.7 25.9 122 33.8 29.3 115
NORTHEAST ENTRANCE 7350 10.6 9.9 107 14.6 13.9 105
PARKER PEAK 9400 28.9 23.7 122 -M 18.2 *
SYLVAN LAKE 8420 22.8 24.1 95 28.3 23.2 122
THUMB DIVIDE 7980 19.2 18.0 107 22.3 20.8 107
TWO OCEAN PLATEAU 9240 -M 31.1 * -M 30.4 *
WHISKEY CREEK 6800 19.5 17.5 111 26.1 23.0 113
WHITE MILL 8700 29.8 26.2 114 29.6 29.6 100
WOLVERINE 7650 10.1 10.2 99 15.1 14.2 106
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Basin wide percent of average 113 109
WIND RIVER
BURROUGHS CREEK 8750 16.8 14.9 113 20.0 18.1 110
COLD SPRINGS 9630 6.5 6.1 107 10.9 12.5 87
DEER PARK 9700 16.7 17.8 94 21.9 24.8 88
HOBBS PARK 10100 15.3 17.0 90 16.5 15.2 109
LITTLE WARM 9370 10.5 12.2 86 14.9 15.3 97
SOUTH PASS 9040 15.5 17.8 87 18.9 20.9 90
ST. LAWRENCE ALT 8620 6.7 6.8 99 9.0 10.6 85
TOGWOTEE PASS 9580 29.2 27.1 108 31.7 27.3 116
TOWNSEND CREEK 8700 8.9 9.6 93 13.2 13.9 95
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Basin wide percent of average 98 99
BIGHORN BASIN
BALD MTN. 9380 17.7 22.3 79 16.7 19.6 85
BEAR TRAP MEADOW 8200 8.8 4.0 220 10.0 9.8 102
BLACKWATER 9780 28.2 27.2 104 25.9 23.1 112
BONE SPRINGS DIV 9350 19.2 17.7 108 19.3 16.8 115
EVENING STAR 9200 32.3 32.4 100 36.3 28.2 129
GRAVE SPRINGS 8550 11.0 10.8 102 11.3 11.8 96
KIRWIN 9550 13.3 12.5 106 15.8 12.9 122
MARQUETTE 8760 7.6 10.6 72 10.9 12.0 91
MIDDLE POWDER 7760 13.2 14.2 93 10.7 14.3 75
OWL CREEK 8975 4.6 5.0 92 7.4 7.2 103
POWDER RIVER PASS 9480 13.3 11.7 114 15.7 14.3 110
SHELL CREEK 9580 17.5 16.3 107 16.7 15.3 109
SYLVAN LAKE 8420 22.8 24.1 95 28.3 23.2 122
SYLVAN ROAD 7120 12.9 11.3 114 22.8 19.4 118
TIMBER CREEK 7950 5.2 5.5 95 8.8 9.0 98
YOUNTS PEAK 8350 18.2 18.2 100 19.0 17.8 107
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Basin wide percent of average 101 108
SHOSHONE RIVER
BLACKWATER 9780 28.2 27.2 104 25.9 23.1 112
EVENING STAR 9200 32.3 32.4 100 36.3 28.2 129
KIRWIN 9550 13.3 12.5 106 15.8 12.9 122
MARQUETTE 8760 7.6 10.6 72 10.9 12.0 91
SYLVAN LAKE 8420 22.8 24.1 95 28.3 23.2 122
SYLVAN ROAD 7120 12.9 11.3 114 22.8 19.4 118
YOUNTS PEAK 8350 18.2 18.2 100 19.0 17.8 107
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Basin wide percent of average 99 116
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.8 4.0 220 10.0 9.8 102
BIG GOOSE 7990 10.6 12.5 85 14.1 11.2 126
BONE SPRINGS DIV 9350 19.2 17.7 108 19.3 16.8 115
BURGESS JUNCTION 7880 14.5 13.3 109 15.9 14.0 114
CLOUD PEAK RESERVOIR 9860 17.6 15.6 113 17.4 15.2 114
DOME LAKE 8880 13.0 13.8 94 16.9 15.2 111
GRAVE SPRINGS 8550 11.0 10.8 102 11.3 11.8 96
HANSEN SAWMILL 8360 7.2 5.7 126 10.4 9.7 107
MIDDLE POWDER 7760 13.2 14.2 93 10.7 14.3 75
POWDER RIVER PASS 9480 13.3 11.7 114 15.7 14.3 110
SUCKER CREEK 8880 16.4 13.4 122 19.1 15.7 122
TIE CREEK 6870 8.4 5.3 158 13.4 11.9 113
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Basin wide percent of average 111 109
BELLE FOURCHE
BLIND PARK 6890 8.5 7.0 121 12.7 12.8 99
COLE CANYON 5910 6.8 6.9 99 9.4 8.0 118
NORTH RAPID CREEK 6130 9.9 8.3 119 11.0 9.9 111
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Basin wide percent of average 114 108
UPPER N. PLATTE RIVER
COLUMBINE 9160 29.1 24.1 121 31.3 27.7 113
DIVIDE PEAK 8880 25.8 20.9 123 26.3 22.9 115
ELK RIVER 8700 28.2 19.0 148 25.6 21.7 118
JOE WRIGHT 10120 27.7 24.1 115 31.5 27.9 113
NORTH FRENCH CREEK 10130 35.2 33.3 106 33.1 27.6 120
OLD BATTLE 10000 37.9 35.3 107 44.0 37.8 116
SAGE CREEK BASIN 7850 19.5 12.1 161 19.1 13.3 144
SOUTH BRUSH CREEK 8440 15.0 13.0 115 19.2 18.6 103
TOWER 10500 48.1 50.4 95 45.7 42.6 107
WEBBER SPRINGS 9250 30.1 26.0 116 34.4 29.5 117
WILLOW CREEK PASS 9540 20.1 14.0 144 18.9 14.5 130
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Basin wide percent of average 116 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.1 27.2 89 25.2 25.0 101
CASPER MTN. 7900 15.4 17.2 90 16.5 17.4 95
DEADMAN HILL 10220 21.2 18.8 113 22.2 19.3 115
DEER PARK 9700 16.7 17.8 94 21.9 24.8 88
LAPRELE CREEK 8375 7.9 9.6 82 13.3 14.8 90
RENO HILL 8400 15.4 16.0 96 18.5 18.0 103
ROACH 9700 22.0 18.5 119 25.1 20.9 120
SAND LAKE 10050 33.0 35.6 93 33.1 27.2 122
SOUTH PASS 9040 15.5 17.8 87 18.9 20.9 90
WINDY PEAK 7900 9.6 7.4 130 11.7 12.2 96
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Basin wide percent of average 97 103
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 14.4 7.7 187 18.4 17.5 105
DIVIDE PEAK 8880 25.8 20.9 123 26.3 22.9 115
OLD BATTLE 10000 37.9 35.3 107 44.0 37.8 116
SANDSTONE RS 8150 18.7 12.8 146 23.7 20.5 116
WHISKEY PARK 8950 39.7 30.6 130 39.1 31.7 123
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Basin wide percent of average 127 116
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.5 15.2 89 14.3 14.8 97
BLIND BULL SUM 8650 27.6 28.8 96 19.2 24.2 79
EAST RIM DIVIDE 7930 9.3 14.0 66 12.0 13.1 92
ELKHART PARK G.S. 9400 11.3 14.0 81 12.7 14.9 85
GROS VENTRE SUMMIT 8750 13.3 14.5 92 15.0 14.3 105
GUNSIGHT PASS 9820 12.7 -M * 15.4 -M *
KENDALL R.S. 7740 11.2 13.0 86 14.8 15.8 94
LOOMIS PARK 8240 16.0 16.6 96 18.9 19.0 99
NEW FORK LAKE 8340 9.6 10.9 88 10.2 12.5 82
SNIDER BASIN 8060 13.9 14.7 95 15.4 17.7 87
SPRING CREEK DIVIDE 9000 23.0 28.8 80 25.5 28.9 88
TRIPLE PEAK 8500 26.1 25.8 101 30.6 27.2 112
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Basin wide percent of average 89 93
LOWER GREEN RIVER
HAMS FORK 7840 12.1 9.1 133 11.2 13.7 82
HEWINTA 9519 16.9 11.9 142 18.8 16.6 113
HICKERSON PARK 9145 7.6 7.9 96 11.2 9.3 120
HOLE-IN-ROCK 9150 6.9 6.9 100 11.6 8.8 132
INDIAN CREEK 9425 27.4 29.6 93 -M 28.1 *
KELLEY R.S. 8180 15.7 16.7 94 19.2 22.4 86
STEEL CREEK PARK 10200 18.5 17.6 105 20.8 18.8 111
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Basin wide percent of average 105 104
UPPER BEAR RIVER
BUG LAKE 7950 18.4 21.2 87 18.2 21.2 86
HAYDEN FORK 9212 19.8 16.0 124 25.4 23.6 108
KELLEY R.S. 8180 15.7 16.7 94 19.2 22.4 86
LILY LAKE 9156 14.8 14.0 106 20.0 19.8 101
MONTE CRISTO 8960 31.5 30.3 104 28.3 28.4 100
SALT RIVER SUMMIT 7760 13.4 13.8 97 17.2 20.6 83
TRIAL LAKE 9992 24.2 26.5 91 26.5 27.7 96
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Basin wide percent of average 99 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.