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 22 , 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 23.6 17.2 137 26.7 21.9 122
COTTONWOOD CREEK 7600 24.3 22.8 107 26.7 24.6 109
GRANITE CREEK 6770 21.1 17.8 119 22.6 23.1 98
GRASSY LAKE 7265 41.2 34.4 120 39.7 36.3 109
GROS VENTRE SUMMIT 8775 15.2 15.0 101 14.8 15.6 95
LEWIS LAKE DIVIDE 7860 39.9 34.0 117 39.0 36.9 106
PHILLIPS BENCH 8200 31.6 28.0 113 30.9 29.1 106
SALT RIVER SUMMIT 7600 15.4 13.8 112 17.9 16.6 108
SNAKE RIVER STATION 6920 21.6 18.2 119 25.1 25.4 99
SPRING CREEK DIVIDE 9000 28.2 26.8 105 26.8 26.8 100
THUMB DIVIDE 7980 22.9 16.4 140 21.5 20.5 105
TOGWOTEE PASS 9580 -M 23.8 * 27.7 27.6 100
TWO OCEAN PLATEAU 9360 35.5 25.6 139 -M 30.2 *
WILLOW CREEK 8450 32.7 29.3 112 36.5 31.5 116
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Basin wide percent of average 118 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.7 22.6 114 23.1 17.2 134
BLACK BEAR 7950 48.6 36.6 133 -M 38.8 *
CANYON 7940 17.5 12.4 141 18.4 13.7 134
FISHER CREEK 9100 39.1 34.3 114 -M 35.0 *
MADISON PLATEAU 7750 -M 23.6 * -M 25.1 *
NORTHEAST ENTRANCE 7350 12.0 9.0 133 14.0 11.4 123
PARKER PEAK 9400 22.5 20.7 109 -M 14.9 *
SYLVAN LAKE 8420 25.1 21.2 118 26.8 18.3 146
THUMB DIVIDE 7980 22.9 16.4 140 21.5 20.5 105
TWO OCEAN PLATEAU 9360 35.5 25.6 139 -M 30.2 *
WHISKEY CREEK 6800 20.1 16.6 121 23.4 20.8 112
WHITE MILL 8700 27.2 24.2 112 24.4 27.1 90
WOLVERINE 7650 12.7 11.3 112 12.4 12.2 102
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Basin wide percent of average 123 116
WIND RIVER
BURROUGHS CREEK 8750 16.5 14.5 114 17.7 15.8 112
COLD SPRINGS 9630 8.8 8.0 110 11.0 9.9 111
DEER PARK 9700 15.9 -M * 20.8 -M *
HOBBS PARK 10100 16.5 14.2 116 14.7 13.2 111
LITTLE WARM 9620 13.3 10.9 122 14.7 12.5 118
SOUTH PASS 9040 16.9 15.7 108 17.9 16.0 112
ST. LAWRENCE ALT 8620 6.5 7.2 90 9.5 9.5 100
TOGWOTEE PASS 9580 -M 23.8 * 27.7 27.6 100
TOWNSEND CREEK 8700 9.0 9.4 96 11.9 11.6 103
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Basin wide percent of average 110 108
BIGHORN BASIN
BALD MTN. 9375 19.1 19.5 98 17.8 16.3 109
BEAR TRAP MEADOW 7900 6.3 6.8 93 9.0 7.6 118
BLACKWATER 9780 29.3 21.1 139 24.0 17.2 140
BONE SPRINGS DIV 9350 15.2 15.6 97 15.3 14.0 109
EVENING STAR 9200 32.1 25.8 124 33.4 21.5 155
GRAVE SPRINGS 8550 7.9 9.0 88 10.6 8.9 119
KIRWIN 9550 12.2 9.4 130 13.8 10.1 137
MARQUETTE 8760 8.2 7.6 108 8.8 8.7 101
MIDDLE POWDER 7760 10.3 11.4 90 15.0 11.0 136
OWL CREEK 8975 5.9 4.3 137 6.6 5.8 114
POWDER RIVER PASS 9480 12.3 10.3 119 14.6 10.8 135
SHELL CREEK 9580 15.9 14.3 111 14.7 12.3 120
SYLVAN LAKE 8420 25.1 21.2 118 26.8 18.3 146
SYLVAN ROAD 8120 16.6 12.4 134 18.9 15.4 123
TIMBER CREEK 7950 4.7 5.9 80 6.4 6.4 100
YOUNTS PEAK 8350 20.8 16.5 126 18.8 15.8 119
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Basin wide percent of average 115 127
SHOSHONE RIVER
BLACKWATER 9780 29.3 21.1 139 24.0 17.2 140
EVENING STAR 9200 32.1 25.8 124 33.4 21.5 155
KIRWIN 9550 12.2 9.4 130 13.8 10.1 137
MARQUETTE 8760 8.2 7.6 108 8.8 8.7 101
SYLVAN LAKE 8420 25.1 21.2 118 26.8 18.3 146
SYLVAN ROAD 8120 16.6 12.4 134 18.9 15.4 123
YOUNTS PEAK 8350 20.8 16.5 126 18.8 15.8 119
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Basin wide percent of average 127 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.3 6.8 93 9.0 7.6 118
BIG GOOSE 7990 6.1 -M * 9.3 -M *
BONE SPRINGS DIV 9350 15.2 15.6 97 15.3 14.0 109
BURGESS JUNCTION 7880 8.3 11.2 74 10.0 10.6 94
CLOUD PEAK RESERVOIR 9860 14.2 13.8 103 12.7 12.3 103
DOME LAKE 8880 -M 13.0 * 10.5 12.3 85
GRAVE SPRINGS 8550 7.9 9.0 88 10.6 8.9 119
HANSEN SAWMILL 8760 5.3 6.7 79 7.8 7.3 107
MIDDLE POWDER 7760 10.3 11.4 90 15.0 11.0 136
POWDER RIVER PASS 9480 12.3 10.3 119 14.6 10.8 135
SUCKER CREEK 8880 9.9 11.4 87 12.4 12.3 101
TIE CREEK 6870 3.5 -M * 8.0 10.1 79
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Basin wide percent of average 93 107
BELLE FOURCHE
BLIND PARK 6890 7.6 10.5 72 14.9 9.2 162
NORTH RAPID CREEK 6130 5.7 -M * 12.6 -M *
WARREN PEAK 6520 10.4 10.5 99 14.0 7.4 189
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Basin wide percent of average 86 174
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.3 24.0 85 20.8 23.2 90
DIVIDE PEAK 8800 17.7 19.8 89 22.6 21.5 105
ELK RIVER 8700 16.6 19.1 87 20.6 18.0 114
JOE WRIGHT 10120 19.5 20.6 95 25.0 23.5 106
NORTH FRENCH CREEK 10100 26.9 24.0 112 27.1 22.0 123
OLD BATTLE 10000 26.3 30.1 87 33.2 28.4 117
SOUTH BRUSH CREEK 8400 11.3 12.1 93 18.1 15.2 119
TOWER 10500 40.8 42.9 95 36.8 34.2 108
WEBBER SPRINGS 9200 17.9 26.3 68 24.1 23.7 102
WILLOW CREEK PASS 9540 11.1 11.1 100 11.4 11.7 97
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Basin wide percent of average 91 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.2 24.2 67 20.8 18.1 115
CASPER MTN. 7900 10.4 15.0 69 15.5 13.0 119
DEADMAN HILL 10220 15.3 15.7 97 16.6 15.5 107
DEER PARK 9700 15.9 -M * 20.8 -M *
LAPRELE CREEK 8320 -M 9.9 * 13.8 10.9 127
RENO HILL 8400 12.7 13.2 96 17.4 17.7 98
ROACH 9700 15.2 16.3 93 18.2 19.9 91
SAND LAKE 10080 31.9 31.2 102 26.4 19.1 138
SOUTH PASS 9040 16.9 15.7 108 17.9 16.0 112
WINDY PEAK 7840 6.2 8.1 77 12.2 8.7 140
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Basin wide percent of average 90 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.5 11.0 105 16.1 14.4 112
DIVIDE PEAK 8800 17.7 19.8 89 22.6 21.5 105
OLD BATTLE 10000 26.3 30.1 87 33.2 28.4 117
SANDSTONE RS 8150 11.1 14.2 78 18.9 17.6 107
WHISKEY PARK 8950 24.4 27.4 89 27.6 26.4 105
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Basin wide percent of average 89 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.8 13.9 114 14.8 15.9 93
BLIND BULL SUM 8650 28.1 28.2 100 21.5 23.4 92
EAST RIM DIVIDE 7930 13.3 13.5 99 13.5 14.9 91
ELKHART PARK G.S. 9400 13.4 13.3 101 13.9 15.7 89
GROS VENTRE SUMMIT 8775 15.2 15.0 101 14.8 15.6 95
KENDALL R.S. 7740 15.1 14.5 104 15.5 15.3 101
LOOMIS PARK 8240 -M 17.0 * 19.4 18.5 105
NEW FORK LAKE 8340 12.2 10.9 112 11.6 14.2 82
SNIDER BASIN 8250 16.0 14.4 111 16.1 14.9 108
SPRING CREEK DIVIDE 9000 28.2 26.8 105 26.8 26.8 100
TRIPLE PEAK 8500 27.5 24.7 111 28.2 30.5 92
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Basin wide percent of average 105 95
LOWER GREEN RIVER
HAMS FORK 7840 13.5 12.1 112 10.8 13.1 82
HEWINTA 9500 10.9 10.6 103 13.5 12.2 111
HICKERSON PARK 9150 6.3 6.3 100 9.0 8.8 102
HOLE-IN-ROCK 9150 5.7 5.9 97 -M 8.8 *
INDIAN CREEK 9425 28.3 27.3 104 23.7 25.3 94
KELLEY R.S. 8180 16.5 16.5 100 18.0 18.4 98
STEEL CREEK PARK 10100 13.7 15.2 90 15.7 12.0 131
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Basin wide percent of average 101 101
UPPER BEAR RIVER
BUG LAKE 7950 21.2 19.9 107 18.7 18.4 102
HAYDEN FORK 9400 15.3 15.9 96 19.7 17.8 111
KELLEY R.S. 8180 16.5 16.5 100 18.0 18.4 98
LILY LAKE 9050 13.1 12.5 105 17.2 13.8 125
MONTE CRISTO 8960 24.8 27.8 89 25.0 24.1 104
SALT RIVER SUMMIT 7600 15.4 13.8 112 17.9 16.6 108
TRIAL LAKE 9960 20.5 24.2 85 21.0 22.6 93
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Basin wide percent of average 97 104
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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.