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 10 , 1999
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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 23.9 16.7 144 27.9 23.7 119
COTTONWOOD CREEK 7600 26.4 23.9 111 29.4 26.5 111
GRANITE CREEK 6770 -M 18.2 * -M 24.9 *
GRASSY LAKE 7265 43.9 37.3 118 42.3 39.3 108
GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 16.9 99
LEWIS LAKE DIVIDE 7860 41.8 36.5 115 41.2 39.9 104
PHILLIPS BENCH 8200 34.3 30.4 113 33.3 31.7 106
SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 17.9 108
SNAKE RIVER STATION 6920 22.2 18.7 119 26.4 27.7 96
SPRING CREEK DIVIDE 9000 32.2 29.2 111 29.4 29.0 102
THUMB DIVIDE 7980 -M 17.4 * -M 22.0 *
TOGWOTEE PASS 9580 -M 26.4 * 29.7 29.9 99
TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.4 99
WILLOW CREEK 8450 34.9 31.4 112 39.0 33.9 116
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Basin wide percent of average 118 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.0 24.9 109 24.4 19.2 127
BLACK BEAR 7950 51.5 39.7 131 -M 42.9 *
CANYON 7940 18.7 13.5 139 20.2 15.0 135
FISHER CREEK 9100 41.2 37.3 111 37.8 38.8 98
MADISON PLATEAU 7750 -M 25.4 * -M 27.7 *
NORTHEAST ENTRANCE 7350 12.7 9.1 140 14.7 12.6 117
PARKER PEAK 9400 25.2 22.9 111 -M 16.5 *
SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144
THUMB DIVIDE 7980 -M 17.4 * -M 22.0 *
TWO OCEAN PLATEAU 9360 37.8 26.7 142 31.9 32.4 99
WHISKEY CREEK 6800 22.0 18.0 123 25.4 23.2 110
WHITE MILL 8700 28.9 25.7 113 25.7 29.9 86
WOLVERINE 7650 12.9 11.9 109 13.2 13.6 98
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Basin wide percent of average 121 109
WIND RIVER
BURROUGHS CREEK 8750 17.9 15.2 118 19.2 17.7 109
COLD SPRINGS 9630 10.0 8.6 116 13.2 11.5 116
DEER PARK 9700 18.4 -M * 23.7 -M *
HOBBS PARK 10100 19.2 16.0 120 17.9 15.2 118
LITTLE WARM 9620 15.6 13.0 121 17.4 14.4 122
SOUTH PASS 9040 19.5 17.2 114 20.7 18.2 114
ST. LAWRENCE ALT 8620 7.6 7.3 105 11.5 11.0 106
TOGWOTEE PASS 9580 -M 26.4 * 29.7 29.9 99
TOWNSEND CREEK 8700 11.2 10.4 109 14.7 13.5 109
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Basin wide percent of average 116 110
BIGHORN BASIN
BALD MTN. 9375 20.9 21.7 96 19.0 18.5 103
BEAR TRAP MEADOW 7900 4.3 7.1 60 10.2 9.0 114
BLACKWATER 9780 31.9 23.9 134 26.4 18.9 140
BONE SPRINGS DIV 9350 18.5 17.7 106 17.4 16.2 109
EVENING STAR 9200 34.3 28.5 121 35.8 23.7 151
GRAVE SPRINGS 8550 9.5 10.4 92 12.5 10.5 120
KIRWIN 9550 13.6 10.9 126 15.2 11.6 132
MARQUETTE 8760 10.0 8.5 117 10.6 10.9 99
MIDDLE POWDER 7760 13.1 13.1 100 17.4 12.9 136
OWL CREEK 8975 7.0 4.8 147 7.3 6.8 108
POWDER RIVER PASS 9480 12.6 11.5 111 15.7 12.5 126
SHELL CREEK 9580 17.4 15.9 110 15.9 14.0 113
SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144
SYLVAN ROAD 8120 17.4 11.5 152 20.2 17.0 119
TIMBER CREEK 7950 6.0 6.5 91 8.0 8.0 99
YOUNTS PEAK 8350 22.2 18.0 124 19.7 17.5 113
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Basin wide percent of average 115 123
SHOSHONE RIVER
BLACKWATER 9780 31.9 23.9 134 26.4 18.9 140
EVENING STAR 9200 34.3 28.5 121 35.8 23.7 151
KIRWIN 9550 13.6 10.9 126 15.2 11.6 132
MARQUETTE 8760 10.0 8.5 117 10.6 10.9 99
SYLVAN LAKE 8420 27.5 23.4 118 29.2 20.4 144
SYLVAN ROAD 8120 17.4 11.5 152 20.2 17.0 119
YOUNTS PEAK 8350 22.2 18.0 124 19.7 17.5 113
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Basin wide percent of average 126 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.3 7.1 60 10.2 9.0 114
BIG GOOSE 7990 8.1 -M * 11.6 -M *
BONE SPRINGS DIV 9350 18.5 17.7 106 17.4 16.2 109
BURGESS JUNCTION 7880 10.2 12.6 81 12.0 12.5 96
CLOUD PEAK RESERVOIR 9860 16.9 16.2 105 15.0 14.5 103
DOME LAKE 8880 -M 14.5 * 12.4 14.2 87
GRAVE SPRINGS 8550 9.5 10.4 92 12.5 10.5 120
HANSEN SAWMILL 8760 4.8 7.5 65 9.1 8.7 105
MIDDLE POWDER 7760 13.1 13.1 100 17.4 12.9 136
POWDER RIVER PASS 9480 12.6 11.5 111 15.7 12.5 126
SUCKER CREEK 8880 11.5 13.0 88 14.1 14.2 100
TIE CREEK 6870 -M -M * -M 12.0 *
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Basin wide percent of average 93 109
BELLE FOURCHE
BLIND PARK 6890 6.5 11.5 56 16.5 11.2 148
NORTH RAPID CREEK 6130 6.3 -M * 14.0 -M *
WARREN PEAK 6520 10.9 11.5 94 -M 8.7 *
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Basin wide percent of average 75 148*
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.0 24.7 78 22.7 25.7 89
DIVIDE PEAK 8800 20.9 21.7 97 25.7 24.2 107
ELK RIVER 8700 17.2 20.4 85 23.4 20.2 117
JOE WRIGHT 10120 21.2 23.5 91 27.2 26.7 102
NORTH FRENCH CREEK 10100 32.3 27.4 118 30.5 24.9 123
OLD BATTLE 10000 31.5 34.7 92 37.5 31.9 118
SOUTH BRUSH CREEK 8400 11.7 13.2 89 20.2 17.7 115
TOWER 10500 46.8 47.8 98 39.9 38.4 104
WEBBER SPRINGS 9200 20.0 28.5 71 27.7 26.9 103
WILLOW CREEK PASS 9540 12.7 13.0 98 12.5 13.5 92
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Basin wide percent of average 92 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.2 28.2 58 23.2 20.9 112
CASPER MTN. 7900 12.0 18.2 66 17.5 15.5 113
DEADMAN HILL 10220 16.5 17.4 95 17.4 18.2 97
DEER PARK 9700 18.4 -M * 23.7 -M *
LAPRELE CREEK 8320 -M 10.4 * 15.1 12.7 119
RENO HILL 8400 14.7 15.2 97 19.2 20.2 96
ROACH 9700 15.5 17.9 87 20.2 22.7 89
SAND LAKE 10080 37.0 34.8 107 29.7 21.7 137
SOUTH PASS 9040 19.5 17.2 114 20.7 18.2 114
WINDY PEAK 7840 7.0 9.2 77 13.5 10.5 130
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Basin wide percent of average 88 111
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.1 11.1 110 18.4 16.4 113
DIVIDE PEAK 8800 20.9 21.7 97 25.7 24.2 107
OLD BATTLE 10000 31.5 34.7 92 37.5 31.9 118
SANDSTONE RS 8150 13.6 15.2 90 21.9 20.0 110
WHISKEY PARK 8950 28.5 30.2 95 31.2 30.0 105
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Basin wide percent of average 95 110
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.7 15.2 110 16.2 17.2 94
BLIND BULL SUM 8650 29.2 30.7 96 23.2 25.4 92
EAST RIM DIVIDE 7930 14.5 14.7 99 14.9 16.2 92
ELKHART PARK G.S. 9400 14.9 14.7 101 15.7 16.9 93
GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 16.9 99
KENDALL R.S. 7740 16.0 13.7 117 17.2 16.5 104
LOOMIS PARK 8240 -M 17.2 * 21.2 20.0 106
NEW FORK LAKE 8340 13.4 11.0 121 12.5 15.4 82
SNIDER BASIN 8250 18.5 15.4 121 18.7 16.2 117
SPRING CREEK DIVIDE 9000 32.2 29.2 111 29.4 29.0 102
TRIPLE PEAK 8500 31.4 26.7 119 31.7 32.8 97
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Basin wide percent of average 109 98
LOWER GREEN RIVER
HAMS FORK 7840 14.7 8.1 182 12.5 14.2 88
HEWINTA 9500 13.5 10.0 136 15.2 14.1 108
HICKERSON PARK 9150 6.3 6.8 93 10.5 10.5 100
HOLE-IN-ROCK 9150 7.0 6.5 108 10.9 10.5 104
INDIAN CREEK 9425 31.9 30.0 107 26.7 27.4 98
KELLEY R.S. 8180 18.0 17.5 103 19.9 19.9 100
STEEL CREEK PARK 10100 16.0 17.5 91 17.9 13.9 129
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Basin wide percent of average 112 103
UPPER BEAR RIVER
BUG LAKE 7950 24.4 20.5 119 21.7 20.7 105
HAYDEN FORK 9400 16.0 13.0 124 21.4 20.4 105
KELLEY R.S. 8180 18.0 17.5 103 19.9 19.9 100
LILY LAKE 9050 12.6 13.1 97 19.2 15.9 121
MONTE CRISTO 8960 28.5 29.7 97 27.9 27.2 103
SALT RIVER SUMMIT 7600 16.9 14.1 120 19.2 17.9 108
TRIAL LAKE 9960 22.4 25.7 87 23.4 25.4 93
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Basin wide percent of average 104 104
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-M = Missing data
* = Data may not provide a valid measure of conditions.
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.