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 1 , 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 17.8 133 27.3 22.8 120
COTTONWOOD CREEK 7600 25.0 24.5 102 27.7 25.7 108
GRANITE CREEK 6770 21.6 18.8 115 23.1 24.0 96
GRASSY LAKE 7265 43.3 36.3 119 40.7 38.1 107
GROS VENTRE SUMMIT 8775 16.0 15.8 101 15.7 16.3 96
LEWIS LAKE DIVIDE 7860 40.8 35.7 114 39.9 38.7 103
PHILLIPS BENCH 8200 32.7 29.4 111 31.7 30.6 104
SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.3 107
SNAKE RIVER STATION 6920 -M 18.8 * -M 26.7 *
SPRING CREEK DIVIDE 9000 29.6 28.3 105 27.7 28.1 99
THUMB DIVIDE 7980 23.6 17.2 137 22.5 21.3 106
TOGWOTEE PASS 9580 -M 25.2 * 28.5 29.0 98
TWO OCEAN PLATEAU 9360 36.5 26.8 136 31.3 31.4 100
WILLOW CREEK 8450 33.4 30.5 110 37.8 32.9 115
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Basin wide percent of average 116 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.2 23.8 110 23.4 18.2 129
BLACK BEAR 7950 50.5 38.5 131 -M 41.3 *
CANYON 7940 18.0 13.1 137 19.2 14.4 133
FISHER CREEK 9100 40.1 36.1 111 36.7 37.1 99
MADISON PLATEAU 7750 -M 24.8 * 31.6 26.7 118
NORTHEAST ENTRANCE 7350 11.7 9.2 127 14.0 11.9 118
PARKER PEAK 9400 23.5 21.8 108 -M 15.7 *
SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144
THUMB DIVIDE 7980 23.6 17.2 137 22.5 21.3 106
TWO OCEAN PLATEAU 9360 36.5 26.8 136 31.3 31.4 100
WHISKEY CREEK 6800 20.8 17.5 119 23.9 22.2 108
WHITE MILL 8700 27.8 25.1 111 24.8 28.7 86
WOLVERINE 7650 12.4 11.7 106 12.6 12.8 98
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Basin wide percent of average 121 110
WIND RIVER
BURROUGHS CREEK 8750 17.0 15.0 113 18.3 16.7 110
COLD SPRINGS 9630 9.2 8.4 110 12.1 10.6 114
DEER PARK 9700 16.6 -M * 21.7 -M *
HOBBS PARK 10100 17.5 15.1 116 16.1 14.2 113
LITTLE WARM 9620 14.7 11.6 127 16.0 13.3 120
SOUTH PASS 9040 17.7 16.4 108 18.7 17.1 109
ST. LAWRENCE ALT 8620 6.7 7.6 88 10.3 10.2 101
TOGWOTEE PASS 9580 -M 25.2 * 28.5 29.0 98
TOWNSEND CREEK 8700 9.8 9.9 99 12.9 12.5 103
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Basin wide percent of average 110 108
BIGHORN BASIN
BALD MTN. 9375 19.7 20.5 96 17.9 17.4 103
BEAR TRAP MEADOW 7900 4.8 7.2 67 9.5 8.2 116
BLACKWATER 9780 30.8 22.4 138 25.0 18.1 138
BONE SPRINGS DIV 9350 16.1 16.5 98 16.0 15.1 106
EVENING STAR 9200 33.3 27.2 122 34.4 22.7 152
GRAVE SPRINGS 8550 8.3 9.6 86 11.2 9.6 117
KIRWIN 9550 12.6 10.0 126 14.0 10.8 130
MARQUETTE 8760 8.1 8.1 100 8.8 9.5 93
MIDDLE POWDER 7760 10.6 12.2 87 15.4 11.8 131
OWL CREEK 8975 6.4 4.6 139 6.7 6.2 108
POWDER RIVER PASS 9480 11.9 10.9 109 15.1 11.5 131
SHELL CREEK 9580 16.7 15.0 111 15.2 13.1 116
SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144
SYLVAN ROAD 8120 17.3 12.5 138 19.7 16.2 122
TIMBER CREEK 7950 5.2 6.3 83 7.0 7.0 100
YOUNTS PEAK 8350 21.6 17.3 125 19.1 16.7 114
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Basin wide percent of average 112 123
SHOSHONE RIVER
BLACKWATER 9780 30.8 22.4 138 25.0 18.1 138
EVENING STAR 9200 33.3 27.2 122 34.4 22.7 152
KIRWIN 9550 12.6 10.0 126 14.0 10.8 130
MARQUETTE 8760 8.1 8.1 100 8.8 9.5 93
SYLVAN LAKE 8420 26.3 22.3 118 27.8 19.3 144
SYLVAN ROAD 8120 17.3 12.5 138 19.7 16.2 122
YOUNTS PEAK 8350 21.6 17.3 125 19.1 16.7 114
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Basin wide percent of average 125 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.8 7.2 67 9.5 8.2 116
BIG GOOSE 7990 6.6 -M * 10.0 -M *
BONE SPRINGS DIV 9350 16.1 16.5 98 16.0 15.1 106
BURGESS JUNCTION 7880 9.0 11.8 76 10.7 11.5 93
CLOUD PEAK RESERVOIR 9860 15.2 14.9 102 13.1 13.3 98
DOME LAKE 8880 -M 13.8 * 11.3 13.2 86
GRAVE SPRINGS 8550 8.3 9.6 86 11.2 9.6 117
HANSEN SAWMILL 8760 4.5 7.1 63 8.4 7.9 106
MIDDLE POWDER 7760 10.6 12.2 87 15.4 11.8 131
POWDER RIVER PASS 9480 11.9 10.9 109 15.1 11.5 131
SUCKER CREEK 8880 10.3 12.2 84 12.8 13.1 98
TIE CREEK 6870 2.4 -M * 8.8 11.0 80
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Basin wide percent of average 89 105
BELLE FOURCHE
BLIND PARK 6890 6.6 11.1 59 15.7 10.0 157
NORTH RAPID CREEK 6130 5.6 -M * 13.0 -M *
WARREN PEAK 6520 10.1 11.1 91 14.6 8.0 182
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Basin wide percent of average 75 168
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.5 24.9 74 21.4 24.5 87
DIVIDE PEAK 8800 18.0 21.3 85 23.6 22.8 104
ELK RIVER 8700 15.0 20.0 75 21.6 19.2 113
JOE WRIGHT 10120 19.4 22.1 88 25.7 25.0 103
NORTH FRENCH CREEK 10100 28.9 25.6 113 28.1 23.5 120
OLD BATTLE 10000 28.0 32.2 87 34.6 30.2 115
SOUTH BRUSH CREEK 8400 11.3 13.4 84 18.9 16.3 116
TOWER 10500 42.5 45.4 94 37.7 36.2 104
WEBBER SPRINGS 9200 18.3 28.3 65 25.3 25.2 100
WILLOW CREEK PASS 9540 11.3 12.0 94 11.7 12.6 93
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Basin wide percent of average 86 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.5 26.4 59 21.6 19.4 111
CASPER MTN. 7900 10.3 16.6 62 15.9 14.0 114
DEADMAN HILL 10220 15.8 16.6 95 16.7 16.7 100
DEER PARK 9700 16.6 -M * 21.7 -M *
LAPRELE CREEK 8320 -M 10.6 * 14.0 11.8 119
RENO HILL 8400 13.1 14.4 91 17.5 19.2 91
ROACH 9700 15.1 17.4 87 18.6 21.1 88
SAND LAKE 10080 33.6 33.1 102 27.8 20.3 137
SOUTH PASS 9040 17.7 16.4 108 18.7 17.1 109
WINDY PEAK 7840 6.2 8.8 70 12.6 9.5 133
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Basin wide percent of average 85 110
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.0 11.3 88 16.6 15.3 108
DIVIDE PEAK 8800 18.0 21.3 85 23.6 22.8 104
OLD BATTLE 10000 28.0 32.2 87 34.6 30.2 115
SANDSTONE RS 8150 11.2 15.0 75 19.7 18.6 106
WHISKEY PARK 8950 25.4 29.0 88 28.7 28.2 102
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Basin wide percent of average 85 107
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.7 14.7 114 15.4 16.6 93
BLIND BULL SUM 8650 -M 29.8 * 22.0 24.6 89
EAST RIM DIVIDE 7930 13.9 14.0 99 14.2 15.5 92
ELKHART PARK G.S. 9400 14.0 13.9 101 14.6 16.3 90
GROS VENTRE SUMMIT 8775 16.0 15.8 101 15.7 16.3 96
KENDALL R.S. 7740 15.2 14.7 103 16.3 15.9 103
LOOMIS PARK 8240 -M 17.6 * 20.2 19.3 105
NEW FORK LAKE 8340 12.5 11.3 111 11.8 14.8 80
SNIDER BASIN 8250 16.3 14.9 109 16.9 15.5 109
SPRING CREEK DIVIDE 9000 29.6 28.3 105 27.7 28.1 99
TRIPLE PEAK 8500 29.3 25.9 113 29.6 31.7 93
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Basin wide percent of average 107 95
LOWER GREEN RIVER
HAMS FORK 7840 13.4 12.3 109 11.2 13.7 82
HEWINTA 9500 11.7 11.5 102 13.9 13.1 106
HICKERSON PARK 9150 5.6 6.9 81 9.3 9.5 98
HOLE-IN-ROCK 9150 5.9 6.5 91 -M 9.5 *
INDIAN CREEK 9425 29.4 29.0 101 24.3 26.6 91
KELLEY R.S. 8180 17.1 17.3 99 18.6 19.2 97
STEEL CREEK PARK 10100 14.3 16.6 86 16.3 12.8 127
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Basin wide percent of average 97 99
UPPER BEAR RIVER
BUG LAKE 7950 21.7 21.3 102 19.7 19.6 101
HAYDEN FORK 9400 14.7 16.5 89 20.0 19.1 105
KELLEY R.S. 8180 17.1 17.3 99 18.6 19.2 97
LILY LAKE 9050 11.8 13.4 88 17.8 14.8 120
MONTE CRISTO 8960 26.0 29.9 87 25.9 25.7 101
SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.3 107
TRIAL LAKE 9960 20.9 25.0 84 21.9 24.0 91
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Basin wide percent of average 93 102
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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.