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 20 , 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 20.9 14.5 145 28.4 24.4 117
COTTONWOOD CREEK 7600 24.2 22.4 109 29.4 27.4 108
GRANITE CREEK 6770 21.0 16.4 129 24.0 25.9 94
GRASSY LAKE 7265 42.2 36.7 116 42.7 40.7 105
GROS VENTRE SUMMIT 8775 16.5 15.5 108 16.7 17.5 96
LEWIS LAKE DIVIDE 7860 40.0 36.2 111 41.3 41.3 101
PHILLIPS BENCH 8200 36.0 30.5 119 33.8 32.7 104
SALT RIVER SUMMIT 7600 15.2 13.0 118 19.4 18.7 105
SNAKE RIVER STATION 6920 19.5 18.0 109 26.7 28.5 94
SPRING CREEK DIVIDE 9000 31.7 29.5 108 30.2 29.9 101
THUMB DIVIDE 7980 23.2 16.7 139 23.5 22.9 104
TOGWOTEE PASS 9580 -M 27.5 * 30.7 30.9 100
TWO OCEAN PLATEAU 9360 39.2 27.0 145 33.0 33.5 99
WILLOW CREEK 8450 33.3 31.9 105 39.9 35.0 115
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Basin wide percent of average 118 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.2 25.7 106 24.5 20.2 122
BLACK BEAR 7950 46.5 40.2 116 -M 44.7 *
CANYON 7940 17.7 12.7 139 20.4 15.7 130
FISHER CREEK 9100 37.2 38.3 98 38.3 40.4 95
MADISON PLATEAU 7750 -M 25.2 * 33.7 28.9 117
NORTHEAST ENTRANCE 7350 10.5 8.1 130 14.7 13.2 112
PARKER PEAK 9400 24.9 23.4 107 -M 17.4 *
SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138
THUMB DIVIDE 7980 23.2 16.7 139 23.5 22.9 104
TWO OCEAN PLATEAU 9360 39.2 27.0 145 33.0 33.5 99
WHISKEY CREEK 6800 21.7 17.4 125 25.5 24.0 107
WHITE MILL 8700 28.7 26.0 111 25.9 31.2 84
WOLVERINE 7650 12.5 10.7 116 13.5 14.5 94
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Basin wide percent of average 117 107
WIND RIVER
BURROUGHS CREEK 8750 17.0 14.6 117 19.2 18.5 104
COLD SPRINGS 9630 9.2 8.2 113 13.5 12.2 110
DEER PARK 9700 17.4 -M * 24.5 -M *
HOBBS PARK 10100 19.7 17.0 116 18.2 16.2 113
LITTLE WARM 9620 15.5 12.6 124 17.5 15.4 115
SOUTH PASS 9040 -M 17.9 * 21.5 19.4 111
ST. LAWRENCE ALT 8620 8.1 6.6 123 12.0 11.7 102
TOGWOTEE PASS 9580 -M 27.5 * 30.7 30.9 100
TOWNSEND CREEK 8700 11.5 10.2 112 15.6 14.5 108
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Basin wide percent of average 117 107
BIGHORN BASIN
BALD MTN. 9375 21.7 22.9 95 20.2 19.7 103
BEAR TRAP MEADOW 7900 1.5 6.1 25 10.9 9.9 111
BLACKWATER 9780 32.3 25.2 129 26.7 19.7 136
BONE SPRINGS DIV 9350 19.2 18.2 106 19.4 17.2 114
EVENING STAR 9200 34.5 29.9 116 35.9 24.9 145
GRAVE SPRINGS 8550 10.5 11.0 95 13.6 11.5 120
KIRWIN 9550 13.7 11.4 122 15.5 12.5 125
MARQUETTE 8760 10.7 8.7 123 11.9 12.1 98
MIDDLE POWDER 7760 16.5 14.0 118 19.7 13.9 143
OWL CREEK 8975 6.8 4.3 156 8.0 7.5 106
POWDER RIVER PASS 9480 12.4 11.4 109 16.7 13.6 123
SHELL CREEK 9580 17.0 16.5 104 16.7 15.0 113
SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138
SYLVAN ROAD 8120 16.0 10.0 162 20.4 17.9 115
TIMBER CREEK 7950 6.0 6.5 91 8.7 9.0 97
YOUNTS PEAK 8350 22.2 18.4 121 20.2 18.4 110
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Basin wide percent of average 113 121
SHOSHONE RIVER
BLACKWATER 9780 32.3 25.2 129 26.7 19.7 136
EVENING STAR 9200 34.5 29.9 116 35.9 24.9 145
KIRWIN 9550 13.7 11.4 122 15.5 12.5 125
MARQUETTE 8760 10.7 8.7 123 11.9 12.1 98
SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138
SYLVAN ROAD 8120 16.0 10.0 162 20.4 17.9 115
YOUNTS PEAK 8350 22.2 18.4 121 20.2 18.4 110
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Basin wide percent of average 123 127
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.5 6.1 25 10.9 9.9 111
BIG GOOSE 7990 9.1 -M * 13.6 -M *
BONE SPRINGS DIV 9350 19.2 18.2 106 19.4 17.2 114
BURGESS JUNCTION 7880 11.5 13.1 88 13.5 13.5 100
CLOUD PEAK RESERVOIR 9860 19.4 17.2 114 18.2 15.9 116
DOME LAKE 8880 -M 15.0 * 13.5 15.4 89
GRAVE SPRINGS 8550 10.5 11.0 95 13.6 11.5 120
HANSEN SAWMILL 8760 4.1 7.5 56 10.1 9.5 107
MIDDLE POWDER 7760 16.5 14.0 118 19.7 13.9 143
POWDER RIVER PASS 9480 12.4 11.4 109 16.7 13.6 123
SUCKER CREEK 8880 13.0 13.5 96 16.5 15.4 108
TIE CREEK 6870 -M -M * -M 12.9 *
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Basin wide percent of average 97 113
BELLE FOURCHE
BLIND PARK 6890 5.0 11.0 46 17.2 12.5 137
NORTH RAPID CREEK 6130 5.8 -M * 15.0 -M *
WARREN PEAK 6520 11.5 11.0 105 11.6 9.5 123
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Basin wide percent of average 75 131
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.0 23.7 76 24.2 26.9 90
DIVIDE PEAK 8800 22.0 21.2 105 27.4 25.7 107
ELK RIVER 8700 -M 19.2 * 24.2 21.2 115
JOE WRIGHT 10120 21.5 24.4 89 28.5 28.4 101
NORTH FRENCH CREEK 10100 34.2 28.7 120 32.5 26.4 124
OLD BATTLE 10000 32.8 36.7 90 39.4 33.8 117
SOUTH BRUSH CREEK 8400 10.1 12.4 83 21.2 19.2 111
TOWER 10500 48.3 49.8 97 41.3 40.8 102
WEBBER SPRINGS 9200 20.7 27.9 75 29.2 28.7 102
WILLOW CREEK PASS 9540 12.9 13.5 95 13.4 14.5 93
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Basin wide percent of average 93 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.9 29.0 55 24.5 22.2 111
CASPER MTN. 7900 14.9 18.7 80 19.9 17.2 117
DEADMAN HILL 10220 18.0 18.4 99 19.0 19.5 98
DEER PARK 9700 17.4 -M * 24.5 -M *
LAPRELE CREEK 8320 -M 9.0 * 17.4 13.7 127
RENO HILL 8400 17.2 15.0 116 22.9 21.4 108
ROACH 9700 17.9 18.2 98 22.7 24.2 94
SAND LAKE 10080 39.9 36.3 111 32.2 23.2 139
SOUTH PASS 9040 -M 17.9 * 21.5 19.4 111
WINDY PEAK 7840 7.3 9.0 81 15.0 11.4 133
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Basin wide percent of average 91 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 8.5 9.0 94 19.2 17.4 110
DIVIDE PEAK 8800 22.0 21.2 105 27.4 25.7 107
OLD BATTLE 10000 32.8 36.7 90 39.4 33.8 117
SANDSTONE RS 8150 12.4 13.6 91 22.4 21.4 105
WHISKEY PARK 8950 29.4 30.4 97 32.3 31.9 101
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Basin wide percent of average 95 108
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.9 15.0 106 16.2 17.9 91
BLIND BULL SUM 8650 30.4 28.5 107 23.4 26.2 90
EAST RIM DIVIDE 7930 14.1 15.0 95 15.0 16.7 90
ELKHART PARK G.S. 9400 14.7 14.7 100 15.7 17.7 90
GROS VENTRE SUMMIT 8775 16.5 15.5 108 16.7 17.5 96
KENDALL R.S. 7740 14.5 12.5 117 17.5 17.0 103
LOOMIS PARK 8240 -M 16.4 * 21.4 20.7 103
NEW FORK LAKE 8340 12.4 10.4 120 13.0 16.0 82
SNIDER BASIN 8250 17.7 14.9 120 18.9 16.7 114
SPRING CREEK DIVIDE 9000 31.7 29.5 108 30.2 29.9 101
TRIPLE PEAK 8500 27.7 26.4 105 32.0 33.8 95
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Basin wide percent of average 108 96
LOWER GREEN RIVER
HAMS FORK 7840 11.5 5.8 197 12.5 14.7 86
HEWINTA 9500 10.1 8.0 128 15.5 15.2 102
HICKERSON PARK 9150 3.9 5.5 71 10.5 11.4 93
HOLE-IN-ROCK 9150 6.6 5.0 133 11.0 11.4 98
INDIAN CREEK 9425 32.5 30.0 109 27.0 28.4 96
KELLEY R.S. 8180 16.2 16.9 96 19.9 20.7 97
STEEL CREEK PARK 10100 15.9 18.4 87 18.0 15.0 121
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Basin wide percent of average 108 99
UPPER BEAR RIVER
BUG LAKE 7950 22.5 18.9 120 21.9 21.7 101
HAYDEN FORK 9400 11.7 9.5 124 22.2 21.7 103
KELLEY R.S. 8180 16.2 16.9 96 19.9 20.7 97
LILY LAKE 9050 11.2 11.6 97 19.0 16.9 113
MONTE CRISTO 8960 27.4 28.4 97 28.2 28.7 98
SALT RIVER SUMMIT 7600 15.2 13.0 118 19.4 18.7 105
TRIAL LAKE 9960 19.9 25.4 79 23.4 26.9 87
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Basin wide percent of average 101 100
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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.