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 28 , 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 17.5 134 26.9 22.5 120
COTTONWOOD CREEK 7600 24.6 23.8 103 27.4 25.3 108
GRANITE CREEK 6770 21.4 18.4 116 22.9 23.6 97
GRASSY LAKE 7265 42.9 35.5 121 39.9 37.4 107
GROS VENTRE SUMMIT 8775 15.4 15.5 99 15.2 16.0 95
LEWIS LAKE DIVIDE 7860 40.4 35.0 115 39.5 38.0 104
PHILLIPS BENCH 8200 32.3 28.8 112 31.4 30.0 105
SALT RIVER SUMMIT 7600 15.7 14.2 111 18.1 17.0 106
SNAKE RIVER STATION 6920 22.1 18.5 119 25.6 26.2 98
SPRING CREEK DIVIDE 9000 28.9 27.7 104 27.2 27.6 99
THUMB DIVIDE 7980 23.2 16.9 137 22.2 21.0 106
TOGWOTEE PASS 9580 -M 24.7 * 27.9 28.4 98
TWO OCEAN PLATEAU 9360 35.7 26.3 136 31.0 30.9 100
WILLOW CREEK 8450 33.1 30.0 110 37.4 32.3 116
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Basin wide percent of average 117 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.9 23.3 111 23.0 17.8 129
BLACK BEAR 7950 49.5 37.7 131 -M 40.3 *
CANYON 7940 18.1 12.8 141 19.0 14.1 135
FISHER CREEK 9100 39.6 35.4 112 36.2 36.3 100
MADISON PLATEAU 7750 -M 24.3 * 31.5 26.1 121
NORTHEAST ENTRANCE 7350 11.5 9.1 126 14.0 11.7 120
PARKER PEAK 9400 23.0 21.4 107 -M 15.4 *
SYLVAN LAKE 8420 25.7 21.9 117 27.4 18.9 145
THUMB DIVIDE 7980 23.2 16.9 137 22.2 21.0 106
TWO OCEAN PLATEAU 9360 35.7 26.3 136 31.0 30.9 100
WHISKEY CREEK 6800 20.7 17.1 121 23.8 21.7 110
WHITE MILL 8700 27.6 24.7 112 24.5 28.1 87
WOLVERINE 7650 12.4 11.5 108 12.5 12.6 99
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Basin wide percent of average 121 111
WIND RIVER
BURROUGHS CREEK 8750 16.7 14.8 113 17.9 16.4 109
COLD SPRINGS 9630 8.8 8.2 107 11.1 10.3 108
DEER PARK 9700 16.1 -M * 21.3 -M *
HOBBS PARK 10100 16.6 14.7 113 15.1 13.8 109
LITTLE WARM 9620 13.9 11.3 123 15.2 13.0 117
SOUTH PASS 9040 17.1 16.1 106 18.1 16.7 108
ST. LAWRENCE ALT 8620 6.6 7.5 88 9.7 9.9 98
TOGWOTEE PASS 9580 -M 24.7 * 27.9 28.4 98
TOWNSEND CREEK 8700 9.0 9.7 93 12.0 12.2 98
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Basin wide percent of average 108 105
BIGHORN BASIN
BALD MTN. 9375 19.4 20.1 97 17.5 17.0 103
BEAR TRAP MEADOW 7900 5.1 7.0 73 9.2 8.0 115
BLACKWATER 9780 29.7 21.9 136 24.1 17.7 136
BONE SPRINGS DIV 9350 15.0 16.1 93 15.3 14.7 104
EVENING STAR 9200 32.4 26.6 122 33.8 22.2 152
GRAVE SPRINGS 8550 8.0 9.3 86 10.8 9.3 116
KIRWIN 9550 12.1 9.8 123 13.9 10.5 132
MARQUETTE 8760 7.6 7.9 96 8.3 9.2 90
MIDDLE POWDER 7760 10.4 11.9 87 15.1 11.5 131
OWL CREEK 8975 5.9 4.5 131 6.1 6.0 102
POWDER RIVER PASS 9480 11.4 10.7 107 14.8 11.2 132
SHELL CREEK 9580 16.4 14.7 112 15.0 12.8 117
SYLVAN LAKE 8420 25.7 21.9 117 27.4 18.9 145
SYLVAN ROAD 8120 17.1 12.5 137 19.4 15.9 122
TIMBER CREEK 7950 4.8 6.1 79 6.5 6.8 96
YOUNTS PEAK 8350 21.2 17.0 125 18.8 16.3 115
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Basin wide percent of average 111 123
SHOSHONE RIVER
BLACKWATER 9780 29.7 21.9 136 24.1 17.7 136
EVENING STAR 9200 32.4 26.6 122 33.8 22.2 152
KIRWIN 9550 12.1 9.8 123 13.9 10.5 132
MARQUETTE 8760 7.6 7.9 96 8.3 9.2 90
SYLVAN LAKE 8420 25.7 21.9 117 27.4 18.9 145
SYLVAN ROAD 8120 17.1 12.5 137 19.4 15.9 122
YOUNTS PEAK 8350 21.2 17.0 125 18.8 16.3 115
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Basin wide percent of average 124 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.1 7.0 73 9.2 8.0 115
BIG GOOSE 7990 6.2 -M * 9.4 -M *
BONE SPRINGS DIV 9350 15.0 16.1 93 15.3 14.7 104
BURGESS JUNCTION 7880 8.5 11.5 74 10.3 11.1 93
CLOUD PEAK RESERVOIR 9860 14.4 14.5 99 12.6 12.9 98
DOME LAKE 8880 -M 13.5 * 10.7 12.8 84
GRAVE SPRINGS 8550 8.0 9.3 86 10.8 9.3 116
HANSEN SAWMILL 8760 4.2 7.0 60 8.0 7.7 104
MIDDLE POWDER 7760 10.4 11.9 87 15.1 11.5 131
POWDER RIVER PASS 9480 11.4 10.7 107 14.8 11.2 132
SUCKER CREEK 8880 9.7 11.9 82 12.3 12.8 96
TIE CREEK 6870 2.0 -M * 8.2 10.6 77
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Basin wide percent of average 87 104
BELLE FOURCHE
BLIND PARK 6890 6.7 10.9 61 15.4 9.7 159
NORTH RAPID CREEK 6130 5.2 -M * 12.5 -M *
WARREN PEAK 6520 10.0 10.9 92 14.5 7.8 186
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Basin wide percent of average 77 171
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.0 24.5 78 21.1 24.0 88
DIVIDE PEAK 8800 18.0 20.7 87 23.1 22.3 104
ELK RIVER 8700 15.2 19.6 78 21.2 18.7 113
JOE WRIGHT 10120 19.4 21.5 90 25.6 24.4 105
NORTH FRENCH CREEK 10100 28.4 25.0 114 28.1 22.9 123
OLD BATTLE 10000 27.6 31.4 88 34.2 29.5 116
SOUTH BRUSH CREEK 8400 11.3 12.9 88 18.8 15.9 118
TOWER 10500 42.3 44.4 95 37.6 35.4 106
WEBBER SPRINGS 9200 18.3 27.5 67 25.1 24.6 102
WILLOW CREEK PASS 9540 11.4 11.6 98 11.5 12.3 93
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Basin wide percent of average 88 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.7 25.5 62 21.5 18.9 114
CASPER MTN. 7900 10.1 16.0 63 15.6 13.6 115
DEADMAN HILL 10220 15.4 16.2 95 16.8 16.2 104
DEER PARK 9700 16.1 -M * 21.3 -M *
LAPRELE CREEK 8320 -M 10.3 * 13.8 11.5 120
RENO HILL 8400 13.0 13.9 94 17.2 18.6 92
ROACH 9700 15.2 17.0 89 18.6 20.6 90
SAND LAKE 10080 33.3 32.3 103 27.6 19.8 139
SOUTH PASS 9040 17.1 16.1 106 18.1 16.7 108
WINDY PEAK 7840 6.3 8.5 74 12.3 9.2 134
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Basin wide percent of average 87 111
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.7 11.2 96 16.4 15.0 109
DIVIDE PEAK 8800 18.0 20.7 87 23.1 22.3 104
OLD BATTLE 10000 27.6 31.4 88 34.2 29.5 116
SANDSTONE RS 8150 11.2 14.7 76 19.5 18.2 107
WHISKEY PARK 8950 25.3 28.4 89 28.5 27.5 104
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Basin wide percent of average 87 108
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.8 14.4 110 15.1 16.3 93
BLIND BULL SUM 8650 27.3 29.2 93 21.8 24.1 90
EAST RIM DIVIDE 7930 13.6 13.8 99 13.8 15.3 90
ELKHART PARK G.S. 9400 13.4 13.6 99 14.1 16.0 88
GROS VENTRE SUMMIT 8775 15.4 15.5 99 15.2 16.0 95
KENDALL R.S. 7740 14.8 14.6 101 15.8 15.6 101
LOOMIS PARK 8240 -M 17.3 * 19.8 19.0 104
NEW FORK LAKE 8340 12.2 11.2 109 11.5 14.6 79
SNIDER BASIN 8250 16.0 14.7 109 16.5 15.3 108
SPRING CREEK DIVIDE 9000 28.9 27.7 104 27.2 27.6 99
TRIPLE PEAK 8500 28.5 25.4 112 28.6 31.2 92
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Basin wide percent of average 103 95
LOWER GREEN RIVER
HAMS FORK 7840 13.1 12.2 107 10.9 13.5 81
HEWINTA 9500 10.8 11.1 97 13.8 12.7 109
HICKERSON PARK 9150 5.8 6.6 88 9.1 9.2 99
HOLE-IN-ROCK 9150 6.0 6.3 95 -M 9.2 *
INDIAN CREEK 9425 28.7 28.3 101 23.9 26.1 92
KELLEY R.S. 8180 16.8 17.0 99 18.3 18.9 97
STEEL CREEK PARK 10100 13.9 16.1 86 15.9 12.5 127
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Basin wide percent of average 97 99
UPPER BEAR RIVER
BUG LAKE 7950 21.2 20.7 102 19.0 19.1 99
HAYDEN FORK 9400 14.5 16.2 90 19.5 18.6 105
KELLEY R.S. 8180 16.8 17.0 99 18.3 18.9 97
LILY LAKE 9050 12.3 13.0 95 17.6 14.4 122
MONTE CRISTO 8960 25.4 29.1 87 25.5 25.1 102
SALT RIVER SUMMIT 7600 15.7 14.2 111 18.1 17.0 106
TRIAL LAKE 9960 20.8 24.7 84 21.4 23.4 91
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Basin wide percent of average 94 102
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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.