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: MARCH 15 , 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 24.7 16.7 148 25.4 21.3 119
COTTONWOOD CREEK 7600 24.0 21.6 111 26.4 23.8 111
GRANITE CREEK 6770 21.3 17.1 125 22.7 22.4 101
GRASSY LAKE 7265 41.3 33.0 125 38.7 35.0 111
GROS VENTRE SUMMIT 8775 15.2 14.4 106 14.7 15.1 97
LEWIS LAKE DIVIDE 7860 40.6 32.8 124 -M 35.6 *
PHILLIPS BENCH 8200 31.6 27.0 117 -M 28.1 *
SALT RIVER SUMMIT 7600 15.5 13.3 117 17.7 16.1 110
SNAKE RIVER STATION 6920 22.2 17.7 125 25.0 24.6 102
SPRING CREEK DIVIDE 9000 27.9 25.8 108 26.8 25.9 103
THUMB DIVIDE 7980 -M 15.8 * -M 19.9 *
TOGWOTEE PASS 9580 -M 22.9 * 27.5 26.6 103
TWO OCEAN PLATEAU 9360 34.9 24.7 141 -M 29.4 *
WILLOW CREEK 8450 32.6 28.4 115 35.4 30.5 116
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Basin wide percent of average 122 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.3 21.8 116 22.9 16.5 139
BLACK BEAR 7950 48.8 35.2 139 -M 37.1 *
CANYON 7940 17.6 11.9 148 18.3 13.1 140
FISHER CREEK 9100 39.0 33.1 118 -M 33.6 *
MADISON PLATEAU 7750 -M 22.7 * -M 24.0 *
NORTHEAST ENTRANCE 7350 12.3 8.8 140 13.9 11.0 126
PARKER PEAK 9400 22.3 20.0 112 -M 14.3 *
SYLVAN LAKE 8420 24.5 20.4 120 26.2 17.7 148
THUMB DIVIDE 7980 -M 15.8 * -M 19.9 *
TWO OCEAN PLATEAU 9360 34.9 24.7 141 -M 29.4 *
WHISKEY CREEK 6800 20.1 16.0 126 -M 19.9 *
WHITE MILL 8700 27.1 23.5 115 24.3 26.0 93
WOLVERINE 7650 13.9 11.0 126 12.4 11.8 105
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Basin wide percent of average 126 123*
WIND RIVER
BURROUGHS CREEK 8750 16.4 14.2 115 17.7 15.2 116
COLD SPRINGS 9630 9.1 7.7 118 11.0 9.4 117
DEER PARK 9700 15.8 -M * 20.7 -M *
HOBBS PARK 10100 16.5 13.5 122 14.7 12.6 117
LITTLE WARM 9620 13.3 10.4 128 14.5 11.9 122
SOUTH PASS 9040 16.8 15.2 111 17.9 15.3 117
ST. LAWRENCE ALT 8620 6.7 7.0 96 9.5 9.0 106
TOGWOTEE PASS 9580 -M 22.9 * 27.5 26.6 103
TOWNSEND CREEK 8700 9.1 9.0 101 11.9 11.0 108
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Basin wide percent of average 114 112
BIGHORN BASIN
BALD MTN. 9375 19.0 18.8 101 17.7 15.6 113
BEAR TRAP MEADOW 7900 6.9 6.5 106 9.0 7.2 125
BLACKWATER 9780 29.1 20.2 144 24.0 16.5 145
BONE SPRINGS DIV 9350 15.4 14.9 103 15.3 13.2 116
EVENING STAR 9200 32.4 24.8 131 -M 20.7 *
GRAVE SPRINGS 8550 8.0 8.5 94 10.5 8.4 125
KIRWIN 9550 12.0 9.0 133 13.8 9.6 144
MARQUETTE 8760 8.0 7.3 110 8.8 8.2 107
MIDDLE POWDER 7760 10.4 10.9 95 15.0 10.4 144
OWL CREEK 8975 5.9 4.1 144 6.6 5.5 120
POWDER RIVER PASS 9480 12.3 9.9 124 14.6 10.3 142
SHELL CREEK 9580 15.9 13.8 115 14.6 11.7 125
SYLVAN LAKE 8420 24.5 20.4 120 26.2 17.7 148
SYLVAN ROAD 8120 16.5 12.3 134 18.6 14.8 126
TIMBER CREEK 7950 4.8 5.6 86 6.4 6.0 107
YOUNTS PEAK 8350 20.4 16.0 128 18.2 15.2 120
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Basin wide percent of average 119 129
SHOSHONE RIVER
BLACKWATER 9780 29.1 20.2 144 24.0 16.5 145
EVENING STAR 9200 32.4 24.8 131 -M 20.7 *
KIRWIN 9550 12.0 9.0 133 13.8 9.6 144
MARQUETTE 8760 8.0 7.3 110 8.8 8.2 107
SYLVAN LAKE 8420 24.5 20.4 120 26.2 17.7 148
SYLVAN ROAD 8120 16.5 12.3 134 18.6 14.8 126
YOUNTS PEAK 8350 20.4 16.0 128 18.2 15.2 120
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Basin wide percent of average 130 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.9 6.5 106 9.0 7.2 125
BIG GOOSE 7990 6.2 -M * 9.3 -M *
BONE SPRINGS DIV 9350 15.4 14.9 103 15.3 13.2 116
BURGESS JUNCTION 7880 8.3 10.7 78 10.0 9.9 101
CLOUD PEAK RESERVOIR 9860 14.3 13.0 110 12.8 11.7 109
DOME LAKE 8880 6.8 12.5 54 10.4 11.7 89
GRAVE SPRINGS 8550 8.0 8.5 94 10.5 8.4 125
HANSEN SAWMILL 8760 5.7 6.5 88 7.8 6.9 113
MIDDLE POWDER 7760 10.4 10.9 95 15.0 10.4 144
POWDER RIVER PASS 9480 12.3 9.9 124 14.6 10.3 142
SUCKER CREEK 8880 10.0 10.9 92 12.5 11.7 107
TIE CREEK 6870 3.7 -M * 8.0 9.5 84
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Basin wide percent of average 94 114
BELLE FOURCHE
BLIND PARK 6890 7.9 10.1 78 14.8 8.7 170
NORTH RAPID CREEK 6130 5.8 -M * 12.6 -M *
WARREN PEAK 6520 10.8 10.1 107 13.9 7.0 199
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Basin wide percent of average 93 183
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.4 23.4 87 21.0 22.3 94
DIVIDE PEAK 8800 17.5 18.7 94 22.6 20.6 110
ELK RIVER 8700 18.0 18.4 98 20.5 17.2 119
JOE WRIGHT 10120 19.4 19.6 99 25.1 22.4 112
NORTH FRENCH CREEK 10100 27.4 22.9 120 27.2 21.0 130
OLD BATTLE 10000 26.2 28.7 91 33.2 27.1 123
SOUTH BRUSH CREEK 8400 10.3 11.2 92 18.0 14.4 125
TOWER 10500 41.0 41.2 100 36.4 32.8 111
WEBBER SPRINGS 9200 18.0 24.9 72 24.1 22.7 106
WILLOW CREEK PASS 9540 11.0 10.5 105 11.3 11.1 102
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Basin wide percent of average 95 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 17.8 22.6 79 20.8 17.3 120
CASPER MTN. 7900 10.7 13.9 77 15.5 12.2 127
DEADMAN HILL 10220 15.5 15.0 103 16.6 14.7 113
DEER PARK 9700 15.8 -M * 20.7 -M *
LAPRELE CREEK 8320 -M 9.4 * 13.7 10.3 133
RENO HILL 8400 12.8 12.3 104 17.5 16.7 105
ROACH 9700 14.4 15.6 92 18.4 19.0 97
SAND LAKE 10080 31.6 29.8 106 26.5 18.2 146
SOUTH PASS 9040 16.8 15.2 111 17.9 15.3 117
WINDY PEAK 7840 6.4 7.6 84 12.4 8.2 151
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Basin wide percent of average 95 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.9 10.8 119 16.3 13.8 118
DIVIDE PEAK 8800 17.5 18.7 94 22.6 20.6 110
OLD BATTLE 10000 26.2 28.7 91 33.2 27.1 123
SANDSTONE RS 8150 12.5 13.6 92 19.0 16.8 113
WHISKEY PARK 8950 25.1 26.3 95 27.6 25.1 110
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Basin wide percent of average 96 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.7 13.4 117 14.5 15.4 94
BLIND BULL SUM 8650 27.6 27.1 102 21.4 22.6 95
EAST RIM DIVIDE 7930 13.2 13.2 100 13.5 14.5 93
ELKHART PARK G.S. 9400 13.3 12.8 104 13.7 15.2 90
GROS VENTRE SUMMIT 8775 15.2 14.4 106 14.7 15.1 97
KENDALL R.S. 7740 14.7 14.4 102 15.4 14.8 104
LOOMIS PARK 8240 -M 16.5 * 19.3 17.9 108
NEW FORK LAKE 8340 11.9 10.7 111 11.7 13.8 85
SNIDER BASIN 8250 16.3 14.0 116 16.1 14.5 111
SPRING CREEK DIVIDE 9000 27.9 25.8 108 26.8 25.9 103
TRIPLE PEAK 8500 27.0 23.8 113 27.5 29.6 93
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Basin wide percent of average 108 98
LOWER GREEN RIVER
HAMS FORK 7840 13.8 11.9 116 10.7 12.7 84
HEWINTA 9500 11.2 10.0 112 13.5 11.5 117
HICKERSON PARK 9150 6.7 5.8 116 9.3 8.2 113
HOLE-IN-ROCK 9150 6.6 5.5 120 9.4 8.2 115
INDIAN CREEK 9425 27.9 26.1 107 22.9 24.4 94
KELLEY R.S. 8180 16.3 15.9 103 17.8 17.9 99
STEEL CREEK PARK 10100 13.8 14.3 97 15.6 11.4 137
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Basin wide percent of average 108 105
UPPER BEAR RIVER
BUG LAKE 7950 21.0 18.9 111 18.7 17.6 106
HAYDEN FORK 9400 15.7 15.4 102 19.6 17.0 115
KELLEY R.S. 8180 16.3 15.9 103 17.8 17.9 99
LILY LAKE 9050 13.0 11.8 110 17.1 13.1 131
MONTE CRISTO 8960 25.0 26.4 95 24.8 23.0 108
SALT RIVER SUMMIT 7600 15.5 13.3 117 17.7 16.1 110
TRIAL LAKE 9960 20.0 23.7 84 20.6 21.6 95
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Basin wide percent of average 101 108
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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.