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 FRIDAY: MARCH 19 , 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 24.4 17.0 144 26.5 21.7 122
COTTONWOOD CREEK 7600 24.1 22.3 108 26.5 24.3 109
GRANITE CREEK 6770 21.0 17.5 120 22.6 22.8 99
GRASSY LAKE 7265 41.1 33.8 122 39.7 35.8 111
GROS VENTRE SUMMIT 8775 15.1 14.7 103 14.8 15.4 96
LEWIS LAKE DIVIDE 7860 40.2 33.5 120 38.9 36.3 107
PHILLIPS BENCH 8200 31.6 27.6 114 30.8 28.7 107
SALT RIVER SUMMIT 7600 15.4 13.6 113 17.7 16.4 108
SNAKE RIVER STATION 6920 21.9 18.0 122 25.1 25.1 100
SPRING CREEK DIVIDE 9000 28.0 26.4 106 26.8 26.4 102
THUMB DIVIDE 7980 -M 16.1 * -M 20.3 *
TOGWOTEE PASS 9580 -M 23.4 * 27.5 27.2 101
TWO OCEAN PLATEAU 9360 34.8 25.2 138 -M 29.8 *
WILLOW CREEK 8450 32.4 28.9 112 36.1 31.1 116
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Basin wide percent of average 118 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.4 22.3 114 22.9 16.9 136
BLACK BEAR 7950 48.6 36.0 135 -M 38.1 *
CANYON 7940 17.7 12.2 145 18.4 13.4 137
FISHER CREEK 9100 39.2 33.8 116 -M 34.4 *
MADISON PLATEAU 7750 -M 23.2 * -M 24.6 *
NORTHEAST ENTRANCE 7350 12.6 8.9 142 13.9 11.2 124
PARKER PEAK 9400 22.4 20.4 110 -M 14.6 *
SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146
THUMB DIVIDE 7980 -M 16.1 * -M 20.3 *
TWO OCEAN PLATEAU 9360 34.8 25.2 138 -M 29.8 *
WHISKEY CREEK 6800 -M 16.4 * -M 20.4 *
WHITE MILL 8700 27.2 23.9 114 24.3 26.6 91
WOLVERINE 7650 13.3 11.2 119 12.4 12.0 103
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Basin wide percent of average 124 120*
WIND RIVER
BURROUGHS CREEK 8750 16.3 14.4 113 17.7 15.6 113
COLD SPRINGS 9630 8.9 7.9 113 11.0 9.7 113
DEER PARK 9700 15.8 -M * 20.7 -M *
HOBBS PARK 10100 16.5 13.9 119 14.7 12.9 114
LITTLE WARM 9620 13.0 10.7 121 14.5 12.3 118
SOUTH PASS 9040 16.8 15.5 108 17.9 15.7 114
ST. LAWRENCE ALT 8620 6.6 7.1 93 9.5 9.3 102
TOGWOTEE PASS 9580 -M 23.4 * 27.5 27.2 101
TOWNSEND CREEK 8700 8.9 9.2 97 11.9 11.4 104
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Basin wide percent of average 111 109
BIGHORN BASIN
BALD MTN. 9375 19.1 19.2 99 17.8 16.0 111
BEAR TRAP MEADOW 7900 6.8 6.7 101 9.0 7.4 122
BLACKWATER 9780 29.1 20.7 141 24.0 16.9 142
BONE SPRINGS DIV 9350 15.3 15.3 100 15.2 13.7 111
EVENING STAR 9200 32.3 25.4 127 33.3 21.1 158
GRAVE SPRINGS 8550 7.9 8.8 90 10.5 8.7 121
KIRWIN 9550 12.0 9.2 130 13.8 9.9 139
MARQUETTE 8760 7.9 7.5 105 8.8 8.5 104
MIDDLE POWDER 7760 10.3 11.2 92 15.0 10.7 140
OWL CREEK 8975 5.9 4.2 140 6.5 5.7 114
POWDER RIVER PASS 9480 12.6 10.1 125 14.6 10.6 138
SHELL CREEK 9580 15.9 14.1 113 14.7 12.1 121
SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146
SYLVAN ROAD 8120 16.3 12.3 133 18.7 15.1 124
TIMBER CREEK 7950 4.8 5.8 83 6.4 6.2 103
YOUNTS PEAK 8350 20.4 16.3 125 18.2 15.5 117
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Basin wide percent of average 116 129
SHOSHONE RIVER
BLACKWATER 9780 29.1 20.7 141 24.0 16.9 142
EVENING STAR 9200 32.3 25.4 127 33.3 21.1 158
KIRWIN 9550 12.0 9.2 130 13.8 9.9 139
MARQUETTE 8760 7.9 7.5 105 8.8 8.5 104
SYLVAN LAKE 8420 24.6 20.8 118 26.3 18.0 146
SYLVAN ROAD 8120 16.3 12.3 133 18.7 15.1 124
YOUNTS PEAK 8350 20.4 16.3 125 18.2 15.5 117
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Basin wide percent of average 127 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.8 6.7 101 9.0 7.4 122
BIG GOOSE 7990 6.2 -M * 9.3 -M *
BONE SPRINGS DIV 9350 15.3 15.3 100 15.2 13.7 111
BURGESS JUNCTION 7880 8.3 11.0 75 10.0 10.3 97
CLOUD PEAK RESERVOIR 9860 14.2 13.4 106 12.6 12.0 105
DOME LAKE 8880 -M 12.8 * 10.5 12.0 88
GRAVE SPRINGS 8550 7.9 8.8 90 10.5 8.7 121
HANSEN SAWMILL 8760 5.6 6.6 85 7.8 7.1 110
MIDDLE POWDER 7760 10.3 11.2 92 15.0 10.7 140
POWDER RIVER PASS 9480 12.6 10.1 125 14.6 10.6 138
SUCKER CREEK 8880 9.9 11.2 88 12.4 12.0 103
TIE CREEK 6870 -M -M * -M 9.8 *
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Basin wide percent of average 96 113
BELLE FOURCHE
BLIND PARK 6890 8.1 10.3 79 14.8 9.0 164
NORTH RAPID CREEK 6130 5.8 -M * 12.5 -M *
WARREN PEAK 6520 10.6 10.3 103 13.9 7.2 193
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Basin wide percent of average 91 177
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.5 23.8 86 20.9 22.8 92
DIVIDE PEAK 8800 17.3 19.3 90 22.6 21.1 107
ELK RIVER 8700 17.6 18.8 94 20.9 17.6 119
JOE WRIGHT 10120 19.6 20.2 97 25.1 23.0 109
NORTH FRENCH CREEK 10100 27.6 23.5 117 27.2 21.6 126
OLD BATTLE 10000 26.2 29.5 89 33.2 27.8 119
SOUTH BRUSH CREEK 8400 11.0 11.7 94 18.1 14.9 121
TOWER 10500 41.0 42.2 97 36.7 33.6 109
WEBBER SPRINGS 9200 17.9 25.7 70 24.2 23.3 104
WILLOW CREEK PASS 9540 11.1 10.9 102 11.4 11.5 99
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Basin wide percent of average 93 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.5 23.5 70 20.8 17.8 117
CASPER MTN. 7900 10.6 14.5 73 15.5 12.7 122
DEADMAN HILL 10220 15.4 15.4 100 16.5 15.1 109
DEER PARK 9700 15.8 -M * 20.7 -M *
LAPRELE CREEK 8320 -M 9.7 * 13.7 10.7 128
RENO HILL 8400 12.7 12.8 99 17.4 17.3 101
ROACH 9700 14.7 16.0 92 18.3 19.5 94
SAND LAKE 10080 31.7 30.6 104 26.4 18.7 141
SOUTH PASS 9040 16.8 15.5 108 17.9 15.7 114
WINDY PEAK 7840 6.2 7.9 78 12.2 8.5 144
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Basin wide percent of average 91 117
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.6 10.9 116 16.2 14.2 114
DIVIDE PEAK 8800 17.3 19.3 90 22.6 21.1 107
OLD BATTLE 10000 26.2 29.5 89 33.2 27.8 119
SANDSTONE RS 8150 11.9 13.9 86 18.9 17.3 109
WHISKEY PARK 8950 24.5 26.9 91 27.6 25.8 107
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Basin wide percent of average 92 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.5 13.7 113 14.5 15.7 92
BLIND BULL SUM 8650 27.6 27.7 100 21.4 23.1 93
EAST RIM DIVIDE 7930 13.2 13.4 99 13.5 14.7 92
ELKHART PARK G.S. 9400 13.3 13.1 102 13.7 15.5 88
GROS VENTRE SUMMIT 8775 15.1 14.7 103 14.8 15.4 96
KENDALL R.S. 7740 15.3 14.5 106 15.4 15.1 102
LOOMIS PARK 8240 -M 16.8 * 19.3 18.3 105
NEW FORK LAKE 8340 12.2 10.8 113 11.5 14.0 82
SNIDER BASIN 8250 16.5 14.2 116 16.0 14.7 109
SPRING CREEK DIVIDE 9000 28.0 26.4 106 26.8 26.4 102
TRIPLE PEAK 8500 26.8 24.3 110 27.9 30.1 93
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Basin wide percent of average 106 96
LOWER GREEN RIVER
HAMS FORK 7840 13.8 12.0 115 10.7 12.9 83
HEWINTA 9500 11.3 10.4 109 13.5 11.9 113
HICKERSON PARK 9150 6.6 6.1 108 9.1 8.5 107
HOLE-IN-ROCK 9150 6.7 5.7 118 -M 8.5 *
INDIAN CREEK 9425 27.8 26.8 104 22.9 24.9 92
KELLEY R.S. 8180 16.2 16.2 100 17.8 18.2 98
STEEL CREEK PARK 10100 13.7 14.8 93 15.6 11.8 132
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Basin wide percent of average 104 102
UPPER BEAR RIVER
BUG LAKE 7950 21.1 19.5 108 18.6 18.0 103
HAYDEN FORK 9400 15.5 15.7 99 19.6 17.5 112
KELLEY R.S. 8180 16.2 16.2 100 17.8 18.2 98
LILY LAKE 9050 13.1 12.2 107 17.2 13.5 127
MONTE CRISTO 8960 24.8 27.2 91 24.8 23.6 105
SALT RIVER SUMMIT 7600 15.4 13.6 113 17.7 16.4 108
TRIAL LAKE 9960 20.1 24.0 84 20.7 22.2 93
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Basin wide percent of average 98 105
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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.