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 WEDNESDAY: APRIL 30 , 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 12.6 * -M 24.3 *
COTTONWOOD CREEK 7670 25.7 20.1 128 28.0 31.8 88
GRAND TARGHEE 9260 54.6 -M * 38.0 -M *
GRANITE CREEK 6770 17.2 13.2 130 24.9 22.3 112
GRASSY LAKE 7265 39.4 33.7 117 47.5 40.7 117
GROS VENTRE SUMMIT 8750 13.3 13.4 99 15.7 15.2 103
GUNSIGHT PASS 9820 12.8 -M * 16.5 -M *
LEWIS LAKE DIVIDE 7850 39.9 34.8 115 41.0 41.5 99
PHILLIPS BENCH 8200 35.8 29.6 121 38.4 33.0 116
SALT RIVER SUMMIT 7760 -M 11.0 * -M 21.5 *
SNAKE RIVER STATION 6920 18.5 12.6 147 30.2 25.4 119
SPRING CREEK DIVIDE 9000 24.0 28.7 84 26.5 30.1 88
THUMB DIVIDE 7980 17.9 15.3 117 23.1 21.9 105
TOGWOTEE PASS 9580 30.0 27.9 108 33.3 28.8 116
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 *
WILLOW CREEK 8380 33.3 30.9 108 43.2 37.5 115
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Basin wide percent of average 113 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.9 25.9 108 26.6 23.4 114
BLACK BEAR 8170 48.8 40.1 122 47.0 45.7 103
CANYON 7870 17.8 11.5 155 22.9 17.6 130
FISHER CREEK 9100 44.6 37.8 118 42.6 41.7 102
MADISON PLATEAU 7750 33.3 24.4 136 35.5 30.3 117
NORTHEAST ENTRANCE 7350 9.0 7.4 122 15.2 14.7 103
PARKER PEAK 9400 31.7 24.5 129 27.1 19.4 140
SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121
THUMB DIVIDE 7980 17.9 15.3 117 23.1 21.9 105
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 *
WHISKEY CREEK 6800 20.6 15.4 134 27.4 24.1 114
WHITE MILL 8700 30.8 26.4 117 30.6 31.1 98
WOLVERINE 7650 9.1 7.4 123 15.6 15.1 103
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Basin wide percent of average 121 111
WIND RIVER
BURROUGHS CREEK 8750 16.5 13.8 120 20.6 19.2 107
COLD SPRINGS 9630 3.9 4.9 80 11.5 13.8 83
DEER PARK 9700 16.1 19.0 85 22.6 26.8 84
HOBBS PARK 10100 15.2 18.0 84 17.4 16.8 104
LITTLE WARM 9370 9.7 11.3 86 15.8 16.7 95
SOUTH PASS 9040 14.6 18.1 81 19.6 22.6 87
ST. LAWRENCE ALT 8620 4.9 6.3 78 9.4 12.0 78
TOGWOTEE PASS 9580 30.0 27.9 108 33.3 28.8 116
TOWNSEND CREEK 8700 8.7 9.2 95 14.1 15.4 92
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Basin wide percent of average 93 95
BIGHORN BASIN
BALD MTN. 9380 18.5 23.5 79 17.8 21.2 84
BEAR TRAP MEADOW 8200 6.8 2.7 252 110.7 10.8 1025
BLACKWATER 9780 29.3 28.7 102 27.1 24.6 110
BONE SPRINGS DIV 9350 20.1 18.3 110 20.2 18.2 111
EVENING STAR 9200 33.5 33.2 101 38.0 29.8 128
GRAVE SPRINGS 8550 11.0 11.1 99 12.0 13.0 92
KIRWIN 9550 13.6 13.0 105 16.5 14.1 117
MARQUETTE 8760 8.6 11.2 77 12.2 13.6 90
MIDDLE POWDER 7760 13.6 14.5 94 11.2 15.7 71
OWL CREEK 8975 1.7 4.1 41 8.2 8.1 101
POWDER RIVER PASS 9480 12.4 10.9 114 16.6 15.7 106
SHELL CREEK 9580 17.6 16.9 104 18.0 16.7 108
SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121
SYLVAN ROAD 7120 10.4 8.4 124 23.3 20.4 114
TIMBER CREEK 7950 4.3 4.9 88 9.6 10.4 92
YOUNTS PEAK 8350 18.7 18.2 103 19.6 18.7 105
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Basin wide percent of average 100 142
SHOSHONE RIVER
BLACKWATER 9780 29.3 28.7 102 27.1 24.6 110
EVENING STAR 9200 33.5 33.2 101 38.0 29.8 128
KIRWIN 9550 13.6 13.0 105 16.5 14.1 117
MARQUETTE 8760 8.6 11.2 77 12.2 13.6 90
SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121
SYLVAN ROAD 7120 10.4 8.4 124 23.3 20.4 114
YOUNTS PEAK 8350 18.7 18.2 103 19.6 18.7 105
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Basin wide percent of average 100 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 6.8 2.7 252 110.7 10.8 1025
BIG GOOSE 7990 9.9 11.7 85 14.8 12.8 116
BONE SPRINGS DIV 9350 20.1 18.3 110 20.2 18.2 111
BURGESS JUNCTION 7880 14.8 13.3 111 16.5 15.3 108
CLOUD PEAK RESERVOIR 9860 17.4 16.3 107 18.4 16.9 109
DOME LAKE 8880 12.0 13.7 88 17.8 16.7 107
GRAVE SPRINGS 8550 11.0 11.1 99 12.0 13.0 92
HANSEN SAWMILL 8360 4.4 5.0 88 11.0 10.9 101
MIDDLE POWDER 7760 13.6 14.5 94 11.2 15.7 71
POWDER RIVER PASS 9480 12.4 10.9 114 16.6 15.7 106
SUCKER CREEK 8880 15.8 13.2 120 19.9 17.3 115
TIE CREEK 6870 6.5 4.2 155 14.0 13.4 104
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Basin wide percent of average 107 160
BELLE FOURCHE
BLIND PARK 6890 4.3 4.0 108 13.2 14.1 94
COLE CANYON 5910 4.9 5.2 94 9.8 9.4 104
NORTH RAPID CREEK 6130 7.6 4.2 181 11.5 11.3 102
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Basin wide percent of average 125 99
UPPER N. PLATTE RIVER
COLUMBINE 9160 25.8 21.3 121 32.3 29.0 111
DIVIDE PEAK 8880 23.6 19.6 120 26.7 24.2 110
ELK RIVER 8700 21.0 15.4 136 26.1 22.9 114
JOE WRIGHT 10120 27.1 25.1 108 32.2 29.9 108
NORTH FRENCH CREEK 10130 34.0 34.5 99 34.4 29.5 117
OLD BATTLE 10000 37.9 36.8 103 45.0 39.7 113
SAGE CREEK BASIN 7850 14.7 11.4 129 19.3 14.0 138
SOUTH BRUSH CREEK 8440 11.0 11.3 97 19.7 20.0 98
TOWER 10500 49.0 52.1 94 46.8 44.9 104
WEBBER SPRINGS 9250 28.2 25.3 111 35.2 31.0 114
WILLOW CREEK PASS 9540 20.0 14.2 141 18.9 15.6 121
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Basin wide percent of average 109 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.5 28.3 83 26.2 26.8 98
CASPER MTN. 7900 14.7 17.3 85 17.4 19.4 90
DEADMAN HILL 10220 21.0 19.6 107 22.6 20.8 109
DEER PARK 9700 16.1 19.0 85 22.6 26.8 84
LAPRELE CREEK 8375 7.0 7.4 95 14.1 16.3 87
RENO HILL 8400 15.2 15.0 101 20.4 20.0 102
ROACH 9700 20.3 18.6 109 25.5 22.3 114
SAND LAKE 10050 33.1 36.9 90 34.3 29.1 118
SOUTH PASS 9040 14.6 18.1 81 19.6 22.6 87
WINDY PEAK 7900 7.4 5.2 142 12.3 13.4 92
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Basin wide percent of average 93 99
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 8.6 4.9 176 18.8 18.5 102
DIVIDE PEAK 8880 23.6 19.6 120 26.7 24.2 110
OLD BATTLE 10000 37.9 36.8 103 45.0 39.7 113
SANDSTONE RS 8150 16.2 9.8 165 24.0 21.8 110
WHISKEY PARK 8950 38.7 30.6 126 40.2 33.6 120
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Basin wide percent of average 123 112
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.3 13.7 97 15.0 15.8 95
BLIND BULL SUM 8650 27.4 28.0 98 19.5 25.1 78
EAST RIM DIVIDE 7930 8.7 13.3 65 12.4 13.8 90
ELKHART PARK G.S. 9400 11.5 13.0 88 13.2 15.9 83
GROS VENTRE SUMMIT 8750 13.3 13.4 99 15.7 15.2 103
GUNSIGHT PASS 9820 12.8 -M * 16.5 -M *
KENDALL R.S. 7740 9.9 10.3 96 15.2 16.5 92
LOOMIS PARK 8240 14.4 14.6 99 19.8 19.9 99
NEW FORK LAKE 8340 8.1 8.7 93 10.6 13.3 80
SNIDER BASIN 8060 12.6 12.9 98 15.9 18.5 86
SPRING CREEK DIVIDE 9000 24.0 28.7 84 26.5 30.1 88
TRIPLE PEAK 8500 24.4 24.0 102 31.9 28.5 112
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Basin wide percent of average 93 92
LOWER GREEN RIVER
HAMS FORK 7840 9.8 6.3 156 11.8 14.7 80
HEWINTA 9519 11.2 9.5 118 19.3 17.7 109
HICKERSON PARK 9145 4.4 5.9 75 11.3 10.1 112
HOLE-IN-ROCK 9150 4.5 5.0 90 11.8 9.7 122
INDIAN CREEK 9425 26.9 28.5 94 -M 29.3 *
KELLEY R.S. 8180 15.2 14.4 106 19.9 23.5 85
STEEL CREEK PARK 10200 19.1 18.6 103 21.2 20.1 105
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Basin wide percent of average 103 99
UPPER BEAR RIVER
BUG LAKE 7950 17.5 18.4 95 18.8 22.3 84
HAYDEN FORK 9212 14.8 13.3 111 26.1 25.0 104
KELLEY R.S. 8180 15.2 14.4 106 19.9 23.5 85
LILY LAKE 9156 14.3 11.4 125 20.3 21.0 97
MONTE CRISTO 8960 30.9 28.5 108 29.2 30.1 97
SALT RIVER SUMMIT 7760 -M 11.0 * -M 21.5 *
TRIAL LAKE 9992 23.8 26.5 90 27.2 29.3 93
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Basin wide percent of average 104 94
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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.