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 SUNDAY: MARCH 21 , 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 23.8 17.1 139 26.7 21.8 122
COTTONWOOD CREEK 7600 24.0 22.6 106 26.4 24.5 108
GRANITE CREEK 6770 21.1 17.7 119 22.6 23.0 98
GRASSY LAKE 7265 41.2 34.2 120 39.7 36.1 110
GROS VENTRE SUMMIT 8775 15.1 14.9 101 14.7 15.6 94
LEWIS LAKE DIVIDE 7860 39.8 33.8 118 39.0 36.7 106
PHILLIPS BENCH 8200 31.6 27.8 114 30.8 29.0 106
SALT RIVER SUMMIT 7600 14.7 13.7 107 17.7 16.5 107
SNAKE RIVER STATION 6920 21.6 18.1 119 25.1 25.3 99
SPRING CREEK DIVIDE 9000 27.8 26.7 104 26.5 26.7 99
THUMB DIVIDE 7980 23.1 16.3 142 21.4 20.4 105
TOGWOTEE PASS 9580 -M 23.7 * 27.6 27.5 100
TWO OCEAN PLATEAU 9360 35.0 25.4 138 -M 30.1 *
WILLOW CREEK 8450 33.0 29.1 113 36.5 31.4 116
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Basin wide percent of average 118 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.6 22.5 114 23.0 17.1 135
BLACK BEAR 7950 48.5 36.4 133 -M 38.6 *
CANYON 7940 17.5 12.3 142 18.4 13.6 135
FISHER CREEK 9100 39.2 34.2 115 -M 34.8 *
MADISON PLATEAU 7750 -M 23.4 * -M 25.0 *
NORTHEAST ENTRANCE 7350 12.5 8.9 140 14.0 11.3 124
PARKER PEAK 9400 22.7 20.6 110 -M 14.8 *
SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144
THUMB DIVIDE 7980 23.1 16.3 142 21.4 20.4 105
TWO OCEAN PLATEAU 9360 35.0 25.4 138 -M 30.1 *
WHISKEY CREEK 6800 20.1 16.5 122 23.4 20.7 113
WHITE MILL 8700 27.2 24.1 113 24.3 27.0 90
WOLVERINE 7650 12.7 11.2 113 12.4 12.2 102
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Basin wide percent of average 124 116
WIND RIVER
BURROUGHS CREEK 8750 16.4 14.5 113 17.7 15.7 113
COLD SPRINGS 9630 8.7 7.9 110 11.0 9.8 112
DEER PARK 9700 15.8 -M * 20.7 -M *
HOBBS PARK 10100 16.5 14.1 117 14.7 13.1 112
LITTLE WARM 9620 13.4 10.8 124 14.5 12.4 117
SOUTH PASS 9040 16.8 15.6 108 17.9 15.9 113
ST. LAWRENCE ALT 8620 6.4 7.2 89 9.5 9.4 101
TOGWOTEE PASS 9580 -M 23.7 * 27.6 27.5 100
TOWNSEND CREEK 8700 9.0 9.3 97 11.9 11.5 103
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Basin wide percent of average 110 108
BIGHORN BASIN
BALD MTN. 9375 19.1 19.4 98 17.8 16.2 110
BEAR TRAP MEADOW 7900 6.4 6.7 96 9.0 7.5 120
BLACKWATER 9780 29.3 21.0 140 24.0 17.1 140
BONE SPRINGS DIV 9350 15.3 15.5 99 15.3 13.9 110
EVENING STAR 9200 32.4 25.6 127 33.3 21.4 156
GRAVE SPRINGS 8550 7.9 8.9 89 10.6 8.8 120
KIRWIN 9550 12.1 9.4 129 13.7 10.0 137
MARQUETTE 8760 8.0 7.6 105 8.9 8.6 103
MIDDLE POWDER 7760 10.3 11.4 90 15.0 10.9 138
OWL CREEK 8975 6.0 4.3 140 6.6 5.7 116
POWDER RIVER PASS 9480 12.0 10.3 117 14.6 10.8 135
SHELL CREEK 9580 15.9 14.2 112 14.7 12.2 120
SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144
SYLVAN ROAD 8120 16.4 12.4 132 18.7 15.3 122
TIMBER CREEK 7950 4.7 5.8 81 6.4 6.3 102
YOUNTS PEAK 8350 20.4 16.5 124 18.2 15.7 116
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Basin wide percent of average 115 127
SHOSHONE RIVER
BLACKWATER 9780 29.3 21.0 140 24.0 17.1 140
EVENING STAR 9200 32.4 25.6 127 33.3 21.4 156
KIRWIN 9550 12.1 9.4 129 13.7 10.0 137
MARQUETTE 8760 8.0 7.6 105 8.9 8.6 103
SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144
SYLVAN ROAD 8120 16.4 12.4 132 18.7 15.3 122
YOUNTS PEAK 8350 20.4 16.5 124 18.2 15.7 116
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Basin wide percent of average 126 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.4 6.7 96 9.0 7.5 120
BIG GOOSE 7990 6.2 -M * 9.3 -M *
BONE SPRINGS DIV 9350 15.3 15.5 99 15.3 13.9 110
BURGESS JUNCTION 7880 8.3 11.1 75 10.0 10.5 95
CLOUD PEAK RESERVOIR 9860 14.2 13.7 104 12.7 12.2 104
DOME LAKE 8880 -M 13.0 * 10.5 12.2 86
GRAVE SPRINGS 8550 7.9 8.9 89 10.6 8.8 120
HANSEN SAWMILL 8760 5.3 6.7 79 7.9 7.2 110
MIDDLE POWDER 7760 10.3 11.4 90 15.0 10.9 138
POWDER RIVER PASS 9480 12.0 10.3 117 14.6 10.8 135
SUCKER CREEK 8880 9.9 11.4 87 12.4 12.2 102
TIE CREEK 6870 3.6 -M * 8.0 10.0 80
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Basin wide percent of average 94 108
BELLE FOURCHE
BLIND PARK 6890 7.6 10.5 72 14.8 9.1 163
NORTH RAPID CREEK 6130 5.8 -M * 12.5 -M *
WARREN PEAK 6520 10.4 10.5 99 14.0 7.4 189
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Basin wide percent of average 86 175
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.4 23.9 85 20.9 23.1 90
DIVIDE PEAK 8800 17.5 19.6 89 22.6 21.3 106
ELK RIVER 8700 16.7 19.0 88 20.8 17.9 116
JOE WRIGHT 10120 19.5 20.5 95 25.1 23.3 108
NORTH FRENCH CREEK 10100 27.2 23.9 114 27.1 21.9 124
OLD BATTLE 10000 26.3 29.9 88 33.2 28.2 118
SOUTH BRUSH CREEK 8400 11.4 12.0 95 18.0 15.1 119
TOWER 10500 40.8 42.7 96 36.7 34.0 108
WEBBER SPRINGS 9200 17.7 26.1 68 24.3 23.6 103
WILLOW CREEK PASS 9540 11.1 11.0 101 11.5 11.6 99
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Basin wide percent of average 91 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.4 23.9 69 20.8 18.0 116
CASPER MTN. 7900 10.5 14.9 70 15.5 12.9 120
DEADMAN HILL 10220 15.4 15.6 99 16.6 15.4 108
DEER PARK 9700 15.8 -M * 20.7 -M *
LAPRELE CREEK 8320 -M 9.8 * 13.8 10.8 128
RENO HILL 8400 12.7 13.0 98 17.5 17.6 99
ROACH 9700 15.0 16.2 93 18.3 19.8 92
SAND LAKE 10080 31.8 31.0 103 26.4 19.0 139
SOUTH PASS 9040 16.8 15.6 108 17.9 15.9 113
WINDY PEAK 7840 6.3 8.0 79 12.2 8.6 142
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Basin wide percent of average 90 115
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.8 11.0 107 16.2 14.3 113
DIVIDE PEAK 8800 17.5 19.6 89 22.6 21.3 106
OLD BATTLE 10000 26.3 29.9 88 33.2 28.2 118
SANDSTONE RS 8150 11.0 14.1 78 18.9 17.5 108
WHISKEY PARK 8950 24.4 27.3 89 27.6 26.2 105
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Basin wide percent of average 89 110
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.8 13.9 114 14.5 15.9 91
BLIND BULL SUM 8650 27.9 28.1 99 21.4 23.3 92
EAST RIM DIVIDE 7930 13.1 13.5 97 13.5 14.8 91
ELKHART PARK G.S. 9400 13.3 13.2 101 13.7 15.6 88
GROS VENTRE SUMMIT 8775 15.1 14.9 101 14.7 15.6 94
KENDALL R.S. 7740 15.2 14.5 105 15.4 15.2 101
LOOMIS PARK 8240 -M 16.9 * 19.3 18.4 105
NEW FORK LAKE 8340 12.1 10.9 111 11.7 14.1 83
SNIDER BASIN 8250 15.8 14.3 110 16.0 14.8 108
SPRING CREEK DIVIDE 9000 27.8 26.7 104 26.5 26.7 99
TRIPLE PEAK 8500 27.2 24.5 111 28.1 30.4 92
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Basin wide percent of average 105 95
LOWER GREEN RIVER
HAMS FORK 7840 13.5 12.0 112 10.7 13.1 82
HEWINTA 9500 10.6 10.5 101 13.4 12.1 111
HICKERSON PARK 9150 6.4 6.2 103 9.1 8.7 105
HOLE-IN-ROCK 9150 5.8 5.9 98 -M 8.7 *
INDIAN CREEK 9425 28.3 27.1 104 23.6 25.1 94
KELLEY R.S. 8180 16.4 16.4 100 17.8 18.3 97
STEEL CREEK PARK 10100 13.7 15.1 91 15.7 11.9 132
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Basin wide percent of average 102 101
UPPER BEAR RIVER
BUG LAKE 7950 21.0 19.7 107 18.7 18.3 102
HAYDEN FORK 9400 14.6 15.8 92 19.8 17.7 112
KELLEY R.S. 8180 16.4 16.4 100 17.8 18.3 97
LILY LAKE 9050 12.5 12.4 101 17.1 13.7 125
MONTE CRISTO 8960 24.7 27.6 89 24.8 24.0 103
SALT RIVER SUMMIT 7600 14.7 13.7 107 17.7 16.5 107
TRIAL LAKE 9960 20.0 24.2 83 20.8 22.5 92
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Basin wide percent of average 95 104
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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.