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 SATURDAY: MARCH 27 , 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 23.0 17.5 131 26.8 22.4 120
COTTONWOOD CREEK 7600 24.0 23.6 102 26.8 25.2 106
GRANITE CREEK 6770 21.2 18.3 116 22.7 23.5 97
GRASSY LAKE 7265 42.5 35.3 120 39.9 37.2 107
GROS VENTRE SUMMIT 8775 -M 15.4 * -M 16.0 *
LEWIS LAKE DIVIDE 7860 39.8 34.8 114 39.3 37.8 104
PHILLIPS BENCH 8200 31.8 28.7 111 31.0 29.9 104
SALT RIVER SUMMIT 7600 15.4 14.1 109 18.0 16.9 107
SNAKE RIVER STATION 6920 22.0 18.5 119 25.3 26.1 97
SPRING CREEK DIVIDE 9000 28.5 27.6 103 26.9 27.5 98
THUMB DIVIDE 7980 -M 16.8 * -M 20.9 *
TOGWOTEE PASS 9580 -M 24.5 * 27.8 28.3 98
TWO OCEAN PLATEAU 9360 35.5 26.2 135 30.9 30.8 100
WILLOW CREEK 8450 32.8 29.9 110 37.2 32.2 116
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Basin wide percent of average 115 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.8 23.2 111 23.0 17.7 130
BLACK BEAR 7950 48.7 37.5 130 -M 40.1 *
CANYON 7940 17.7 12.7 139 18.6 14.0 133
FISHER CREEK 9100 39.3 35.2 112 36.1 36.1 100
MADISON PLATEAU 7750 -M 24.2 * 31.2 25.9 120
NORTHEAST ENTRANCE 7350 11.3 9.1 124 13.9 11.6 120
PARKER PEAK 9400 22.8 21.3 107 -M 15.3 *
SYLVAN LAKE 8420 25.4 21.7 117 27.0 18.8 144
THUMB DIVIDE 7980 -M 16.8 * -M 20.9 *
TWO OCEAN PLATEAU 9360 35.5 26.2 135 30.9 30.8 100
WHISKEY CREEK 6800 20.4 17.1 119 23.7 21.5 110
WHITE MILL 8700 27.2 24.6 111 24.3 27.9 87
WOLVERINE 7650 12.3 11.5 107 12.3 12.5 98
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Basin wide percent of average 119 111
WIND RIVER
BURROUGHS CREEK 8750 16.6 14.8 112 17.8 16.3 109
COLD SPRINGS 9630 8.7 8.2 106 11.1 10.2 109
DEER PARK 9700 15.8 -M * 20.9 -M *
HOBBS PARK 10100 16.5 14.6 113 14.7 13.7 107
LITTLE WARM 9620 13.7 11.2 122 14.8 12.9 115
SOUTH PASS 9040 16.8 16.0 105 17.9 16.6 108
ST. LAWRENCE ALT 8620 6.5 7.4 88 9.7 9.8 99
TOGWOTEE PASS 9580 -M 24.5 * 27.8 28.3 98
TOWNSEND CREEK 8700 9.0 9.6 94 12.0 12.1 99
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Basin wide percent of average 107 105
BIGHORN BASIN
BALD MTN. 9375 19.0 20.0 95 17.7 16.9 105
BEAR TRAP MEADOW 7900 4.9 7.0 70 9.1 7.9 115
BLACKWATER 9780 29.5 21.8 135 24.2 17.6 138
BONE SPRINGS DIV 9350 14.7 16.0 92 15.1 14.6 103
EVENING STAR 9200 32.3 26.5 122 33.4 22.1 151
GRAVE SPRINGS 8550 7.8 9.3 84 10.6 9.2 115
KIRWIN 9550 12.1 9.7 125 13.8 10.4 133
MARQUETTE 8760 7.8 7.9 99 8.6 9.1 95
MIDDLE POWDER 7760 10.1 11.8 86 15.0 11.4 132
OWL CREEK 8975 5.9 4.5 131 6.4 6.0 107
POWDER RIVER PASS 9480 11.4 10.6 108 14.8 11.2 132
SHELL CREEK 9580 15.9 14.6 109 14.7 12.7 116
SYLVAN LAKE 8420 25.4 21.7 117 27.0 18.8 144
SYLVAN ROAD 8120 16.8 12.4 135 19.0 15.8 120
TIMBER CREEK 7950 4.8 6.1 79 6.4 6.7 96
YOUNTS PEAK 8350 21.0 16.9 124 18.8 16.2 116
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Basin wide percent of average 110 123
SHOSHONE RIVER
BLACKWATER 9780 29.5 21.8 135 24.2 17.6 138
EVENING STAR 9200 32.3 26.5 122 33.4 22.1 151
KIRWIN 9550 12.1 9.7 125 13.8 10.4 133
MARQUETTE 8760 7.8 7.9 99 8.6 9.1 95
SYLVAN LAKE 8420 25.4 21.7 117 27.0 18.8 144
SYLVAN ROAD 8120 16.8 12.4 135 19.0 15.8 120
YOUNTS PEAK 8350 21.0 16.9 124 18.8 16.2 116
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Basin wide percent of average 124 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.9 7.0 70 9.1 7.9 115
BIG GOOSE 7990 6.0 -M * 9.3 -M *
BONE SPRINGS DIV 9350 14.7 16.0 92 15.1 14.6 103
BURGESS JUNCTION 7880 8.4 11.5 73 10.0 11.0 91
CLOUD PEAK RESERVOIR 9860 14.2 14.3 99 12.7 12.8 99
DOME LAKE 8880 -M 13.4 * 10.2 12.7 80
GRAVE SPRINGS 8550 7.8 9.3 84 10.6 9.2 115
HANSEN SAWMILL 8760 4.3 6.9 62 7.8 7.6 103
MIDDLE POWDER 7760 10.1 11.8 86 15.0 11.4 132
POWDER RIVER PASS 9480 11.4 10.6 108 14.8 11.2 132
SUCKER CREEK 8880 9.8 11.8 83 12.3 12.7 97
TIE CREEK 6870 2.0 -M * 8.0 10.5 76
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Basin wide percent of average 86 103
BELLE FOURCHE
BLIND PARK 6890 6.3 10.8 58 14.9 9.6 155
NORTH RAPID CREEK 6130 5.0 -M * 12.4 -M *
WARREN PEAK 6520 9.7 10.8 90 14.0 7.7 182
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Basin wide percent of average 74 167
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.9 24.5 77 21.0 23.9 88
DIVIDE PEAK 8800 17.6 20.5 86 22.9 22.1 104
ELK RIVER 8700 14.8 19.5 76 20.6 18.6 111
JOE WRIGHT 10120 19.0 21.4 89 25.0 24.2 103
NORTH FRENCH CREEK 10100 27.6 24.8 111 27.4 22.8 120
OLD BATTLE 10000 26.7 31.2 86 33.5 29.3 114
SOUTH BRUSH CREEK 8400 11.3 12.8 88 18.2 15.8 115
TOWER 10500 41.2 44.2 93 36.8 35.2 105
WEBBER SPRINGS 9200 17.7 27.3 65 24.4 24.5 100
WILLOW CREEK PASS 9540 11.1 11.6 96 11.7 12.2 96
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Basin wide percent of average 87 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.3 25.3 60 21.0 18.8 112
CASPER MTN. 7900 10.2 15.8 65 15.5 13.5 115
DEADMAN HILL 10220 15.7 16.1 98 16.5 16.1 102
DEER PARK 9700 15.8 -M * 20.9 -M *
LAPRELE CREEK 8320 -M 10.2 * 13.8 11.4 121
RENO HILL 8400 12.4 13.8 90 17.4 18.5 94
ROACH 9700 14.8 16.9 88 18.3 20.5 89
SAND LAKE 10080 32.4 32.1 101 26.8 19.7 136
SOUTH PASS 9040 16.8 16.0 105 17.9 16.6 108
WINDY PEAK 7840 6.1 8.4 73 12.1 9.1 133
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Basin wide percent of average 86 110
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.3 11.2 92 16.1 14.9 108
DIVIDE PEAK 8800 17.6 20.5 86 22.9 22.1 104
OLD BATTLE 10000 26.7 31.2 86 33.5 29.3 114
SANDSTONE RS 8150 10.7 14.6 73 19.1 18.1 106
WHISKEY PARK 8950 24.5 28.2 87 27.9 27.3 102
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Basin wide percent of average 85 107
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.9 14.3 111 14.8 16.3 91
BLIND BULL SUM 8650 27.5 29.0 95 21.6 24.0 90
EAST RIM DIVIDE 7930 13.2 13.8 96 13.5 15.2 89
ELKHART PARK G.S. 9400 13.5 13.6 99 13.9 16.0 87
GROS VENTRE SUMMIT 8775 -M 15.4 * -M 16.0 *
KENDALL R.S. 7740 14.5 14.6 99 15.5 15.6 99
LOOMIS PARK 8240 -M 17.3 * 19.4 18.9 103
NEW FORK LAKE 8340 12.1 11.1 109 11.6 14.5 80
SNIDER BASIN 8250 15.6 14.6 107 16.2 15.2 107
SPRING CREEK DIVIDE 9000 28.5 27.6 103 26.9 27.5 98
TRIPLE PEAK 8500 27.6 25.3 109 28.4 31.1 91
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Basin wide percent of average 103 94
LOWER GREEN RIVER
HAMS FORK 7840 13.0 12.2 107 10.9 13.4 81
HEWINTA 9500 10.3 11.1 93 13.5 12.6 107
HICKERSON PARK 9150 5.7 6.6 86 9.0 9.1 99
HOLE-IN-ROCK 9150 5.9 6.2 95 -M 9.1 *
INDIAN CREEK 9425 28.6 28.1 102 23.9 25.9 92
KELLEY R.S. 8180 16.5 16.9 98 18.0 18.8 96
STEEL CREEK PARK 10100 13.9 15.9 87 15.7 12.4 127
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Basin wide percent of average 97 99
UPPER BEAR RIVER
BUG LAKE 7950 20.8 20.6 101 18.7 19.0 98
HAYDEN FORK 9400 13.8 16.2 85 19.8 18.5 107
KELLEY R.S. 8180 16.5 16.9 98 18.0 18.8 96
LILY LAKE 9050 12.0 12.9 93 17.3 14.3 121
MONTE CRISTO 8960 24.9 28.9 86 25.1 24.9 101
SALT RIVER SUMMIT 7600 15.4 14.1 109 18.0 16.9 107
TRIAL LAKE 9960 20.5 24.6 83 21.1 23.3 91
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Basin wide percent of average 92 102
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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.