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 WEDNESDAY: APRIL 14 , 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 23.4 16.2 144 28.4 23.9 119
COTTONWOOD CREEK 7600 26.0 23.4 112 29.4 26.9 110
GRANITE CREEK 6770 22.2 17.9 124 24.0 25.4 95
GRASSY LAKE 7265 43.5 37.8 116 42.5 39.8 107
GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.2 *
LEWIS LAKE DIVIDE 7860 41.7 36.8 114 41.3 40.4 103
PHILLIPS BENCH 8200 34.4 30.9 112 33.7 32.0 106
SALT RIVER SUMMIT 7600 16.5 14.0 119 19.4 18.2 107
SNAKE RIVER STATION 6920 21.5 18.7 115 26.5 27.9 95
SPRING CREEK DIVIDE 9000 32.4 29.4 111 30.0 29.4 103
THUMB DIVIDE 7980 -M 17.4 * -M 22.4 *
TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.4 101
TWO OCEAN PLATEAU 9360 38.0 26.7 143 32.0 32.9 98
WILLOW CREEK 8450 35.9 31.7 114 39.8 34.4 116
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Basin wide percent of average 119 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.0 25.4 107 24.4 19.5 126
BLACK BEAR 7950 50.8 40.2 127 -M 43.7 *
CANYON 7940 18.9 13.5 140 20.2 15.4 133
FISHER CREEK 9100 41.2 37.8 109 38.0 39.4 97
MADISON PLATEAU 7750 -M 25.7 * 33.7 28.2 120
NORTHEAST ENTRANCE 7350 -M 9.1 * -M 12.9 *
PARKER PEAK 9400 25.0 23.2 108 -M 16.9 *
SYLVAN LAKE 8420 27.4 23.9 116 29.2 20.7 141
THUMB DIVIDE 7980 -M 17.4 * -M 22.4 *
TWO OCEAN PLATEAU 9360 38.0 26.7 143 32.0 32.9 98
WHISKEY CREEK 6800 22.0 18.2 121 25.5 23.4 109
WHITE MILL 8700 28.9 25.9 112 25.7 30.4 85
WOLVERINE 7650 13.0 11.9 111 13.5 14.0 97
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Basin wide percent of average 119 109
WIND RIVER
BURROUGHS CREEK 8750 17.9 15.4 117 19.2 17.9 107
COLD SPRINGS 9630 9.7 8.7 112 13.4 11.7 114
DEER PARK 9700 18.2 -M * 23.9 -M *
HOBBS PARK 10100 19.2 16.5 116 17.9 15.6 115
LITTLE WARM 9620 15.5 13.5 116 17.5 14.7 120
SOUTH PASS 9040 19.4 17.7 111 20.9 18.7 112
ST. LAWRENCE ALT 8620 7.6 7.3 106 11.5 11.2 103
TOGWOTEE PASS 9580 -M 26.9 * 30.7 30.4 101
TOWNSEND CREEK 8700 11.0 10.5 106 15.0 14.0 108
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Basin wide percent of average 113 109
BIGHORN BASIN
BALD MTN. 9375 21.2 22.2 96 19.4 18.9 103
BEAR TRAP MEADOW 7900 2.9 7.0 42 10.5 9.4 112
BLACKWATER 9780 32.0 24.7 131 26.4 19.2 138
BONE SPRINGS DIV 9350 19.9 18.0 111 18.4 16.5 112
EVENING STAR 9200 34.3 29.2 118 35.8 24.2 149
GRAVE SPRINGS 8550 10.1 10.6 96 13.4 11.0 123
KIRWIN 9550 13.7 11.1 124 15.2 12.0 128
MARQUETTE 8760 10.1 8.7 117 11.0 11.4 98
MIDDLE POWDER 7760 15.7 13.5 117 18.9 13.2 144
OWL CREEK 8975 7.0 4.8 147 7.5 7.1 105
POWDER RIVER PASS 9480 12.0 11.6 104 16.0 13.0 124
SHELL CREEK 9580 17.7 16.2 109 16.2 14.5 113
SYLVAN LAKE 8420 27.4 23.9 116 29.2 20.7 141
SYLVAN ROAD 8120 -M 11.0 * -M 17.4 *
TIMBER CREEK 7950 5.8 6.6 88 8.0 8.5 95
YOUNTS PEAK 8350 22.2 18.4 122 20.2 17.9 113
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Basin wide percent of average 112 123
SHOSHONE RIVER
BLACKWATER 9780 32.0 24.7 131 26.4 19.2 138
EVENING STAR 9200 34.3 29.2 118 35.8 24.2 149
KIRWIN 9550 13.7 11.1 124 15.2 12.0 128
MARQUETTE 8760 10.1 8.7 117 11.0 11.4 98
SYLVAN LAKE 8420 27.4 23.9 116 29.2 20.7 141
SYLVAN ROAD 8120 -M 11.0 * -M 17.4 *
YOUNTS PEAK 8350 22.2 18.4 122 20.2 17.9 113
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Basin wide percent of average 121 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.9 7.0 42 10.5 9.4 112
BIG GOOSE 7990 8.9 -M * 12.5 -M *
BONE SPRINGS DIV 9350 19.9 18.0 111 18.4 16.5 112
BURGESS JUNCTION 7880 11.2 13.0 87 12.9 12.9 100
CLOUD PEAK RESERVOIR 9860 18.4 16.7 111 16.7 15.0 112
DOME LAKE 8880 -M 14.9 * 13.0 14.6 89
GRAVE SPRINGS 8550 10.1 10.6 96 13.4 11.0 123
HANSEN SAWMILL 8760 4.6 7.6 61 9.5 9.0 106
MIDDLE POWDER 7760 15.7 13.5 117 18.9 13.2 144
POWDER RIVER PASS 9480 12.0 11.6 104 16.0 13.0 124
SUCKER CREEK 8880 12.5 13.4 94 15.4 14.6 105
TIE CREEK 6870 -M -M * -M 12.4 *
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Basin wide percent of average 97 112
BELLE FOURCHE
BLIND PARK 6890 6.3 11.6 54 16.9 11.7 145
NORTH RAPID CREEK 6130 6.6 -M * 14.6 -M *
WARREN PEAK 6520 12.2 11.6 106 11.5 9.0 128
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Basin wide percent of average 80 138
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.0 24.5 74 23.4 26.2 90
DIVIDE PEAK 8800 21.7 21.9 100 26.5 24.9 107
ELK RIVER 8700 17.2 20.4 84 24.2 20.5 119
JOE WRIGHT 10120 20.5 24.2 86 27.5 27.4 101
NORTH FRENCH CREEK 10100 33.7 28.2 120 31.9 25.5 125
OLD BATTLE 10000 32.0 35.7 90 38.8 32.7 119
SOUTH BRUSH CREEK 8400 11.6 13.1 89 20.7 18.2 114
TOWER 10500 47.0 48.8 97 40.8 39.3 104
WEBBER SPRINGS 9200 19.9 28.7 70 28.2 27.7 102
WILLOW CREEK PASS 9540 12.7 13.5 95 13.0 14.0 93
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Basin wide percent of average 91 108
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 -M 28.9 * 23.5 21.4 110
CASPER MTN. 7900 13.4 18.9 71 18.7 16.2 116
DEADMAN HILL 10220 16.7 17.9 94 17.9 18.7 96
DEER PARK 9700 18.2 -M * 23.9 -M *
LAPRELE CREEK 8320 -M 10.1 * 16.4 13.1 125
RENO HILL 8400 15.7 15.5 102 20.9 20.7 101
ROACH 9700 16.4 18.2 91 20.7 23.2 89
SAND LAKE 10080 37.8 35.7 106 30.5 22.4 137
SOUTH PASS 9040 19.4 17.7 111 20.9 18.7 112
WINDY PEAK 7840 7.0 9.4 76 14.2 10.7 133
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Basin wide percent of average 95 112
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.7 11.0 107 18.9 16.7 114
DIVIDE PEAK 8800 21.7 21.9 100 26.5 24.9 107
OLD BATTLE 10000 32.0 35.7 90 38.8 32.7 119
SANDSTONE RS 8150 13.6 15.4 89 22.2 20.7 108
WHISKEY PARK 8950 29.2 30.7 96 31.9 30.9 104
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Basin wide percent of average 95 111
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.4 15.5 106 16.2 17.5 93
BLIND BULL SUM 8650 29.7 31.0 96 23.4 25.7 92
EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.4 92
ELKHART PARK G.S. 9400 15.0 15.0 100 15.7 17.2 92
GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.2 *
KENDALL R.S. 7740 16.0 13.4 121 17.4 16.7 105
LOOMIS PARK 8240 -M 17.0 * 21.2 20.4 105
NEW FORK LAKE 8340 13.4 10.9 124 12.9 15.5 83
SNIDER BASIN 8250 18.7 15.5 121 18.7 16.4 115
SPRING CREEK DIVIDE 9000 32.4 29.4 111 30.0 29.4 103
TRIPLE PEAK 8500 31.4 26.9 117 32.0 33.3 97
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Basin wide percent of average 109 98
LOWER GREEN RIVER
HAMS FORK 7840 14.0 6.3 226 12.5 14.5 87
HEWINTA 9500 13.2 9.2 144 15.4 14.5 106
HICKERSON PARK 9150 6.1 6.8 92 10.5 10.9 97
HOLE-IN-ROCK 9150 6.8 6.3 107 11.0 10.9 102
INDIAN CREEK 9425 32.0 30.4 106 26.9 27.9 97
KELLEY R.S. 8180 17.7 17.7 100 20.0 20.2 100
STEEL CREEK PARK 10100 16.2 17.9 90 18.0 14.4 126
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Basin wide percent of average 113 102
UPPER BEAR RIVER
BUG LAKE 7950 23.9 20.2 119 21.9 21.0 104
HAYDEN FORK 9400 15.0 11.4 133 22.0 20.9 106
KELLEY R.S. 8180 17.7 17.7 100 20.0 20.2 100
LILY LAKE 9050 12.6 13.0 97 19.0 16.2 118
MONTE CRISTO 8960 27.2 29.4 93 28.0 27.7 102
SALT RIVER SUMMIT 7600 16.5 14.0 119 19.4 18.2 107
TRIAL LAKE 9960 22.2 26.0 86 23.4 25.9 90
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Basin wide percent of average 103 103
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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.