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 TUESDAY: APRIL 13 , 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 16.4 147 28.4 23.9 120
COTTONWOOD CREEK 7600 26.2 23.5 112 29.4 26.9 110
GRANITE CREEK 6770 22.4 18.0 124 23.7 25.2 95
GRASSY LAKE 7265 44.2 37.7 118 42.5 39.8 108
GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 17.2 98
LEWIS LAKE DIVIDE 7860 41.8 36.8 114 41.3 40.3 103
PHILLIPS BENCH 8200 34.3 30.7 112 33.4 31.9 105
SALT RIVER SUMMIT 7600 16.9 14.0 121 19.4 18.2 108
SNAKE RIVER STATION 6920 22.4 18.7 120 26.5 27.9 96
SPRING CREEK DIVIDE 9000 32.3 29.4 111 29.7 29.2 102
THUMB DIVIDE 7980 -M 17.4 * -M 22.4 *
TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.2 102
TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 32.8 98
WILLOW CREEK 8450 36.3 31.7 115 39.8 34.3 117
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Basin wide percent of average 119 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.2 25.4 108 24.4 19.5 125
BLACK BEAR 7950 51.3 40.0 129 -M 43.4 *
CANYON 7940 18.9 13.5 140 20.2 15.2 133
FISHER CREEK 9100 41.3 37.8 110 38.0 39.3 97
MADISON PLATEAU 7750 -M 25.5 * 33.7 28.0 121
NORTHEAST ENTRANCE 7350 12.7 9.1 140 14.6 12.9 115
PARKER PEAK 9400 25.2 23.0 110 -M 16.9 *
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142
THUMB DIVIDE 7980 -M 17.4 * -M 22.4 *
TWO OCEAN PLATEAU 9360 38.0 26.7 143 31.9 32.8 98
WHISKEY CREEK 6800 22.2 18.2 122 25.5 23.4 110
WHITE MILL 8700 28.9 25.9 112 25.7 30.4 85
WOLVERINE 7650 13.0 11.9 111 13.5 13.9 98
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Basin wide percent of average 120 109
WIND RIVER
BURROUGHS CREEK 8750 -M 15.4 * -M 17.9 *
COLD SPRINGS 9630 9.6 8.7 111 13.4 11.7 114
DEER PARK 9700 18.4 -M * 23.9 -M *
HOBBS PARK 10100 19.4 16.4 118 17.9 15.5 116
LITTLE WARM 9620 15.9 13.4 119 17.4 14.6 120
SOUTH PASS 9040 19.5 17.5 112 20.9 18.7 113
ST. LAWRENCE ALT 8620 7.5 7.3 105 11.5 11.2 103
TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.2 102
TOWNSEND CREEK 8700 11.2 10.5 108 14.9 13.9 108
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Basin wide percent of average 113 110
BIGHORN BASIN
BALD MTN. 9375 21.2 22.2 96 19.4 18.9 104
BEAR TRAP MEADOW 7900 3.7 7.0 52 10.5 9.2 114
BLACKWATER 9780 32.2 24.4 132 26.4 19.2 138
BONE SPRINGS DIV 9350 19.7 17.9 110 18.2 16.4 111
EVENING STAR 9200 34.7 29.0 120 35.8 24.0 150
GRAVE SPRINGS 8550 10.2 10.5 98 13.2 10.9 123
KIRWIN 9550 14.0 11.0 127 15.2 12.0 128
MARQUETTE 8760 10.0 8.7 114 10.9 11.2 97
MIDDLE POWDER 7760 15.6 13.5 116 18.9 13.1 145
OWL CREEK 8975 7.3 4.8 156 7.5 7.0 106
POWDER RIVER PASS 9480 12.2 11.5 107 15.7 12.9 123
SHELL CREEK 9580 17.9 16.2 111 16.2 14.4 114
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142
SYLVAN ROAD 8120 -M 11.1 * -M 17.2 *
TIMBER CREEK 7950 6.0 6.6 90 8.0 8.4 96
YOUNTS PEAK 8350 22.4 18.2 123 20.0 17.9 113
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Basin wide percent of average 113 123
SHOSHONE RIVER
BLACKWATER 9780 32.2 24.4 132 26.4 19.2 138
EVENING STAR 9200 34.7 29.0 120 35.8 24.0 150
KIRWIN 9550 14.0 11.0 127 15.2 12.0 128
MARQUETTE 8760 10.0 8.7 114 10.9 11.2 97
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.7 142
SYLVAN ROAD 8120 -M 11.1 * -M 17.2 *
YOUNTS PEAK 8350 22.4 18.2 123 20.0 17.9 113
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Basin wide percent of average 123 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.7 7.0 52 10.5 9.2 114
BIG GOOSE 7990 8.5 -M * 12.4 -M *
BONE SPRINGS DIV 9350 19.7 17.9 110 18.2 16.4 111
BURGESS JUNCTION 7880 11.0 12.9 86 12.5 12.7 99
CLOUD PEAK RESERVOIR 9860 18.2 16.7 110 16.5 15.0 111
DOME LAKE 8880 -M 14.7 * 12.6 14.5 87
GRAVE SPRINGS 8550 10.2 10.5 98 13.2 10.9 123
HANSEN SAWMILL 8760 5.0 7.6 65 9.4 9.0 105
MIDDLE POWDER 7760 15.6 13.5 116 18.9 13.1 145
POWDER RIVER PASS 9480 12.2 11.5 107 15.7 12.9 123
SUCKER CREEK 8880 12.2 13.2 93 15.0 14.5 104
TIE CREEK 6870 -M -M * -M 12.2 *
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Basin wide percent of average 98 112
BELLE FOURCHE
BLIND PARK 6890 7.0 11.6 61 16.9 11.6 146
NORTH RAPID CREEK 6130 6.8 -M * 14.5 -M *
WARREN PEAK 6520 12.4 11.6 107 11.6 9.0 129
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Basin wide percent of average 84 139
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.0 24.5 78 23.2 26.0 90
DIVIDE PEAK 8800 21.5 21.9 99 26.7 24.7 108
ELK RIVER 8700 17.7 20.4 87 23.9 20.4 118
JOE WRIGHT 10120 20.9 24.0 87 27.5 27.2 102
NORTH FRENCH CREEK 10100 33.8 27.9 121 31.9 25.4 126
OLD BATTLE 10000 32.0 35.3 91 38.8 32.5 120
SOUTH BRUSH CREEK 8400 11.5 13.1 88 20.7 18.2 114
TOWER 10500 47.4 48.5 98 40.8 39.2 105
WEBBER SPRINGS 9200 20.0 28.7 70 28.2 27.4 103
WILLOW CREEK PASS 9540 12.7 13.4 96 12.9 13.9 93
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Basin wide percent of average 92 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.0 28.7 56 23.5 21.2 111
CASPER MTN. 7900 13.2 18.7 71 18.4 16.0 115
DEADMAN HILL 10220 16.7 17.7 94 17.9 18.5 97
DEER PARK 9700 18.4 -M * 23.9 -M *
LAPRELE CREEK 8320 -M 10.1 * 16.2 13.0 125
RENO HILL 8400 15.7 15.5 102 20.7 20.5 101
ROACH 9700 15.9 18.2 88 20.7 23.0 90
SAND LAKE 10080 37.9 35.4 108 30.5 22.2 138
SOUTH PASS 9040 19.5 17.5 112 20.9 18.7 113
WINDY PEAK 7840 7.6 9.4 82 14.2 10.6 134
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Basin wide percent of average 89 112
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.5 11.0 113 18.9 16.7 114
DIVIDE PEAK 8800 21.5 21.9 99 26.7 24.7 108
OLD BATTLE 10000 32.0 35.3 91 38.8 32.5 120
SANDSTONE RS 8150 14.0 15.4 91 22.4 20.4 110
WHISKEY PARK 8950 29.4 30.5 97 31.9 30.7 105
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Basin wide percent of average 96 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.7 15.5 109 16.2 17.4 93
BLIND BULL SUM 8650 29.7 30.9 96 23.4 25.7 92
EAST RIM DIVIDE 7930 14.5 15.0 98 15.0 16.4 92
ELKHART PARK G.S. 9400 14.9 15.0 100 15.7 17.2 92
GROS VENTRE SUMMIT 8775 16.7 16.0 105 16.7 17.2 98
KENDALL R.S. 7740 16.0 13.5 119 17.2 16.7 104
LOOMIS PARK 8240 -M 17.0 * 21.2 20.2 105
NEW FORK LAKE 8340 13.6 10.9 126 12.7 15.5 82
SNIDER BASIN 8250 18.7 15.5 121 18.7 16.2 116
SPRING CREEK DIVIDE 9000 32.3 29.4 111 29.7 29.2 102
TRIPLE PEAK 8500 31.7 26.9 118 31.9 33.2 97
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Basin wide percent of average 109 98
LOWER GREEN RIVER
HAMS FORK 7840 14.5 6.8 217 12.5 14.5 87
HEWINTA 9500 13.1 9.5 140 15.4 14.5 107
HICKERSON PARK 9150 6.8 6.8 102 10.5 10.7 98
HOLE-IN-ROCK 9150 6.8 6.3 108 11.0 10.7 103
INDIAN CREEK 9425 32.3 30.2 107 26.9 27.7 98
KELLEY R.S. 8180 17.9 17.7 102 20.0 20.2 100
STEEL CREEK PARK 10100 16.0 17.9 90 18.0 14.2 127
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Basin wide percent of average 114 102
UPPER BEAR RIVER
BUG LAKE 7950 24.0 20.2 119 21.9 20.9 105
HAYDEN FORK 9400 15.9 11.7 136 22.0 20.7 107
KELLEY R.S. 8180 17.9 17.7 102 20.0 20.2 100
LILY LAKE 9050 12.9 13.0 99 19.0 16.2 119
MONTE CRISTO 8960 27.9 29.4 95 28.2 27.7 102
SALT RIVER SUMMIT 7600 16.9 14.0 121 19.4 18.2 108
TRIAL LAKE 9960 22.2 25.9 86 23.2 25.9 90
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Basin wide percent of average 105 103
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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.