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 THURSDAY: APRIL 8 , 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 -M 17.0 * -M 23.4 *
COTTONWOOD CREEK 7600 25.5 24.0 107 28.4 26.4 108
GRANITE CREEK 6770 21.4 18.4 117 23.5 24.7 96
GRASSY LAKE 7265 43.2 37.2 117 41.7 39.0 107
GROS VENTRE SUMMIT 8775 -M 16.0 * -M 16.9 *
LEWIS LAKE DIVIDE 7860 41.5 36.3 115 41.0 39.8 104
PHILLIPS BENCH 8200 -M 30.2 * -M 31.4 *
SALT RIVER SUMMIT 7600 16.0 14.2 113 18.9 17.9 107
SNAKE RIVER STATION 6920 22.4 18.9 119 26.4 27.4 96
SPRING CREEK DIVIDE 9000 31.4 28.9 109 29.0 28.9 101
THUMB DIVIDE 7980 -M 17.4 * -M 21.9 *
TOGWOTEE PASS 9580 -M 26.2 * 29.2 29.7 99
TWO OCEAN PLATEAU 9360 37.3 26.9 140 31.9 32.3 99
WILLOW CREEK 8450 34.3 31.2 110 38.5 33.8 115
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Basin wide percent of average 116 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.9 24.7 109 23.9 19.0 126
BLACK BEAR 7950 51.7 39.4 131 -M 42.7 *
CANYON 7940 18.5 13.5 139 20.0 15.0 135
FISHER CREEK 9100 41.0 37.2 111 37.8 38.3 99
MADISON PLATEAU 7750 -M 25.4 * 33.0 27.5 121
NORTHEAST ENTRANCE 7350 11.7 9.1 129 14.5 12.5 117
PARKER PEAK 9400 24.2 22.7 108 -M 16.4 *
SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141
THUMB DIVIDE 7980 -M 17.4 * -M 21.9 *
TWO OCEAN PLATEAU 9360 37.3 26.9 140 31.9 32.3 99
WHISKEY CREEK 6800 -M 17.9 * -M 22.9 *
WHITE MILL 8700 28.7 25.5 113 25.4 29.7 86
WOLVERINE 7650 11.6 11.9 99 13.1 13.5 98
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Basin wide percent of average 120 110
WIND RIVER
BURROUGHS CREEK 8750 17.4 15.2 115 18.7 17.4 107
COLD SPRINGS 9630 9.5 8.6 110 13.2 11.2 118
DEER PARK 9700 18.2 -M * 23.4 -M *
HOBBS PARK 10100 19.4 16.0 122 17.9 15.0 120
LITTLE WARM 9620 15.5 12.6 124 16.9 14.1 120
SOUTH PASS 9040 19.2 17.2 113 20.4 18.0 113
ST. LAWRENCE ALT 8620 8.0 7.5 109 11.5 10.9 106
TOGWOTEE PASS 9580 -M 26.2 * 29.2 29.7 99
TOWNSEND CREEK 8700 11.5 10.2 113 14.7 13.4 111
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Basin wide percent of average 116 110
BIGHORN BASIN
BALD MTN. 9375 20.7 21.5 96 19.0 18.2 105
BEAR TRAP MEADOW 7900 4.6 7.1 65 10.1 8.9 115
BLACKWATER 9780 31.9 23.7 135 26.2 18.7 140
BONE SPRINGS DIV 9350 18.0 17.4 104 17.2 16.0 109
EVENING STAR 9200 34.3 28.4 122 35.3 23.5 150
GRAVE SPRINGS 8550 8.5 10.2 84 11.9 10.4 115
KIRWIN 9550 13.4 10.6 126 15.0 11.5 132
MARQUETTE 8760 9.5 8.5 111 10.1 10.5 97
MIDDLE POWDER 7760 11.9 13.0 91 16.5 12.6 131
OWL CREEK 8975 7.3 4.8 154 7.5 6.8 112
POWDER RIVER PASS 9480 12.4 11.4 109 15.7 12.4 128
SHELL CREEK 9580 17.4 15.7 111 16.0 13.9 116
SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141
SYLVAN ROAD 8120 -M 11.7 * -M 16.9 *
TIMBER CREEK 7950 5.8 6.5 90 7.6 7.8 98
YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113
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Basin wide percent of average 112 123
SHOSHONE RIVER
BLACKWATER 9780 31.9 23.7 135 26.2 18.7 140
EVENING STAR 9200 34.3 28.4 122 35.3 23.5 150
KIRWIN 9550 13.4 10.6 126 15.0 11.5 132
MARQUETTE 8760 9.5 8.5 111 10.1 10.5 97
SYLVAN LAKE 8420 26.9 23.2 116 28.2 20.2 141
SYLVAN ROAD 8120 -M 11.7 * -M 16.9 *
YOUNTS PEAK 8350 21.9 17.9 123 19.7 17.4 113
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Basin wide percent of average 123 133
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.6 7.1 65 10.1 8.9 115
BIG GOOSE 7990 7.0 -M * 11.1 -M *
BONE SPRINGS DIV 9350 18.0 17.4 104 17.2 16.0 109
BURGESS JUNCTION 7880 9.6 12.5 78 11.5 12.2 94
CLOUD PEAK RESERVOIR 9860 16.4 16.0 103 15.0 14.2 105
DOME LAKE 8880 -M 14.5 * 12.1 14.0 87
GRAVE SPRINGS 8550 8.5 10.2 84 11.9 10.4 115
HANSEN SAWMILL 8760 5.1 7.5 69 9.1 8.5 108
MIDDLE POWDER 7760 11.9 13.0 91 16.5 12.6 131
POWDER RIVER PASS 9480 12.4 11.4 109 15.7 12.4 128
SUCKER CREEK 8880 11.6 12.9 91 14.0 14.0 100
TIE CREEK 6870 -M -M * -M 11.7 *
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Basin wide percent of average 91 109
BELLE FOURCHE
BLIND PARK 6890 6.8 11.5 60 16.4 11.0 151
NORTH RAPID CREEK 6130 6.1 -M * 13.7 -M *
WARREN PEAK 6520 11.0 11.5 97 15.0 8.6 175
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Basin wide percent of average 79 162
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.7 24.7 76 22.5 25.4 89
DIVIDE PEAK 8800 19.9 21.7 93 25.4 23.9 106
ELK RIVER 8700 16.4 20.2 82 22.7 19.9 114
JOE WRIGHT 10120 20.0 23.2 87 26.7 26.4 102
NORTH FRENCH CREEK 10100 -M 27.0 * -M 24.7 *
OLD BATTLE 10000 30.2 34.2 89 36.5 31.5 116
SOUTH BRUSH CREEK 8400 11.5 13.4 87 19.9 17.4 115
TOWER 10500 -M 47.3 * -M 37.9 *
WEBBER SPRINGS 9200 19.2 28.5 68 26.9 26.5 102
WILLOW CREEK PASS 9540 12.2 12.9 96 12.6 13.4 95
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Basin wide percent of average 83 105
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.9 27.9 57 22.7 20.5 111
CASPER MTN. 7900 -M 17.9 * -M 15.2 *
DEADMAN HILL 10220 15.9 17.4 92 17.4 17.9 98
DEER PARK 9700 18.2 -M * 23.4 -M *
LAPRELE CREEK 8320 -M 10.5 * 15.0 12.5 120
RENO HILL 8400 14.2 15.0 95 19.2 20.0 96
ROACH 9700 15.5 17.9 87 19.7 22.2 89
SAND LAKE 10080 35.5 34.5 103 29.0 21.4 136
SOUTH PASS 9040 19.2 17.2 113 20.4 18.0 113
WINDY PEAK 7840 7.0 9.1 76 13.5 10.2 133
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Basin wide percent of average 89 110
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.5 11.2 102 17.7 16.2 110
DIVIDE PEAK 8800 19.9 21.7 93 25.4 23.9 106
OLD BATTLE 10000 30.2 34.2 89 36.5 31.5 116
SANDSTONE RS 8150 12.5 15.2 82 20.9 19.7 107
WHISKEY PARK 8950 27.0 29.9 91 29.9 29.7 102
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Basin wide percent of average 91 108
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.2 15.1 114 16.0 17.2 93
BLIND BULL SUM 8650 -M 30.5 * -M 25.2 *
EAST RIM DIVIDE 7930 14.4 14.6 98 14.9 16.0 93
ELKHART PARK G.S. 9400 14.5 14.5 100 15.1 16.9 90
GROS VENTRE SUMMIT 8775 -M 16.0 * -M 16.9 *
KENDALL R.S. 7740 15.0 14.0 108 16.7 16.4 102
LOOMIS PARK 8240 -M 17.4 * -M 19.9 *
NEW FORK LAKE 8340 12.7 11.1 115 12.1 15.2 80
SNIDER BASIN 8250 18.2 15.4 119 18.4 16.0 116
SPRING CREEK DIVIDE 9000 31.4 28.9 109 29.0 28.9 101
TRIPLE PEAK 8500 31.0 26.5 117 31.2 32.5 96
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Basin wide percent of average 111 97
LOWER GREEN RIVER
HAMS FORK 7840 14.5 9.1 160 12.2 14.1 87
HEWINTA 9500 12.5 10.4 121 14.9 14.0 107
HICKERSON PARK 9150 6.5 6.8 96 10.2 10.2 100
HOLE-IN-ROCK 9150 6.5 6.5 100 10.7 10.2 105
INDIAN CREEK 9425 31.4 29.9 106 26.2 27.4 96
KELLEY R.S. 8180 17.5 17.5 100 19.2 19.7 98
STEEL CREEK PARK 10100 15.5 17.4 90 17.4 13.6 128
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Basin wide percent of average 108 102
UPPER BEAR RIVER
BUG LAKE 7950 23.7 20.7 115 21.4 20.4 105
HAYDEN FORK 9400 15.5 13.7 114 21.2 20.2 106
KELLEY R.S. 8180 17.5 17.5 100 19.2 19.7 98
LILY LAKE 9050 12.5 13.2 95 18.7 15.6 120
MONTE CRISTO 8960 27.9 29.7 94 27.5 26.9 103
SALT RIVER SUMMIT 7600 16.0 14.2 113 18.9 17.9 107
TRIAL LAKE 9960 21.5 25.7 84 22.7 25.2 91
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Basin wide percent of average 100 103
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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.