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 MONDAY: APRIL 6 , 1998
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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 15.6 17.2 91 20.6 23.2 89
COTTONWOOD CREEK 7600 21.1 24.1 88 24.1 26.1 92
GRANITE CREEK 6770 16.7 18.4 91 21.1 24.5 86
GRASSY LAKE 7265 31.2 36.8 85 34.3 38.7 89
GROS VENTRE SUMMIT 8775 12.2 15.9 77 13.3 16.6 80
LEWIS LAKE DIVIDE 7860 30.9 36.1 86 32.4 39.4 82
PHILLIPS BENCH 8200 27.0 29.9 90 26.7 31.1 86
SALT RIVER SUMMIT 7600 15.4 14.3 108 18.7 17.6 106
SNAKE RIVER STATION 6920 16.7 18.7 89 21.7 27.2 80
SPRING CREEK DIVIDE 9000 21.8 28.7 76 22.4 28.6 78
THUMB DIVIDE 7980 16.1 17.3 93 17.6 21.7 81
TOGWOTEE PASS 9580 25.8 25.8 100 24.5 29.5 83
TWO OCEAN PLATEAU 9360 28.2 26.7 106 27.5 32.0 86
WILLOW CREEK 8450 28.5 30.9 92 32.5 33.5 97
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Basin wide percent of average 90 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 19.7 24.4 81 17.0 18.7 91
BLACK BEAR 7950 39.8 39.1 102 36.8 42.2 87
CANYON 7940 12.9 13.2 98 14.9 14.7 101
FISHER CREEK 9100 31.1 36.7 85 28.6 38.0 75
MADISON PLATEAU 7750 21.4 25.1 85 23.3 27.2 86
NORTHEAST ENTRANCE 7350 6.3 9.1 69 12.1 12.2 99
PARKER PEAK 9400 19.2 22.3 86 16.7 16.1 104
SYLVAN LAKE 8420 18.2 22.9 79 20.9 19.8 106
THUMB DIVIDE 7980 16.1 17.3 93 17.6 21.7 81
TWO OCEAN PLATEAU 9360 28.2 26.7 106 27.5 32.0 86
WHISKEY CREEK 6800 14.6 17.8 82 19.0 22.7 84
WHITE MILL 8700 23.7 25.4 93 21.7 29.4 74
WOLVERINE 7650 9.5 11.7 81 10.4 13.2 79
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Basin wide percent of average 89 87
WIND RIVER
BURROUGHS CREEK 8750 15.5 15.1 103 16.9 17.2 98
COLD SPRINGS 9630 11.3 8.5 133 12.5 11.0 114
DEER PARK 9700 -M -M * 21.5 -M *
HOBBS PARK 10100 16.2 15.6 104 14.5 14.7 99
LITTLE WARM 9620 11.6 12.3 94 13.9 13.8 101
SOUTH PASS 9040 16.2 16.8 96 18.1 17.7 102
ST. LAWRENCE ALT 8620 -M 7.4 * 10.8 10.6 102
TOGWOTEE PASS 9580 25.8 25.8 100 24.5 29.5 83
TOWNSEND CREEK 8700 12.0 10.1 119 14.4 13.0 111
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Basin wide percent of average 104 99
BIGHORN BASIN
BALD MTN. 9375 19.8 21.1 94 17.2 18.0 96
BEAR TRAP MEADOW 7900 6.2 7.1 87 7.6 8.6 88
BLACKWATER 9780 20.7 23.2 89 18.5 18.5 100
BONE SPRINGS DIV 9350 17.5 17.1 102 16.5 15.6 106
EVENING STAR 9200 23.4 27.9 84 25.2 23.2 109
GRAVE SPRINGS 8550 9.6 -M * 10.1 10.1 100
KIRWIN 9550 13.0 10.4 125 14.1 11.2 126
MARQUETTE 8760 13.6 8.3 164 13.6 10.2 133
MIDDLE POWDER 7760 11.0 12.7 87 10.6 12.3 86
OWL CREEK 8975 7.9 4.6 172 7.2 6.5 111
POWDER RIVER PASS 9480 11.5 11.2 103 12.2 12.0 102
SHELL CREEK 9580 14.5 15.4 94 11.0 13.6 81
SYLVAN LAKE 8420 18.2 22.9 79 20.9 19.8 106
SYLVAN ROAD 8120 10.5 11.9 88 14.7 16.6 89
TIMBER CREEK 7950 9.0 6.4 141 10.7 7.5 143
YOUNTS PEAK 8350 15.0 17.7 85 15.1 17.1 88
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Basin wide percent of average 97 102
SHOSHONE RIVER
BLACKWATER 9780 20.7 23.2 89 18.5 18.5 100
EVENING STAR 9200 23.4 27.9 84 25.2 23.2 109
KIRWIN 9550 13.0 10.4 125 14.1 11.2 126
MARQUETTE 8760 13.6 8.3 164 13.6 10.2 133
SYLVAN LAKE 8420 18.2 22.9 79 20.9 19.8 106
SYLVAN ROAD 8120 10.5 11.9 88 14.7 16.6 89
YOUNTS PEAK 8350 15.0 17.7 85 15.1 17.1 88
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Basin wide percent of average 94 105
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.2 7.1 87 7.6 8.6 88
BONE SPRINGS DIV 9350 17.5 17.1 102 16.5 15.6 106
BURGESS JUNCTION 7880 11.3 12.2 93 12.4 12.0 103
CLOUD PEAK RESERVOIR 9860 14.7 15.6 94 14.7 13.9 106
DOME LAKE 8880 11.1 14.2 78 13.2 13.7 96
GRAVE SPRINGS 8550 9.6 -M * 10.1 10.1 100
HANSEN SAWMILL 8760 7.6 7.3 104 9.4 8.3 113
MIDDLE POWDER 7760 11.0 12.7 87 10.6 12.3 86
POWDER RIVER PASS 9480 11.5 11.2 103 12.2 12.0 102
SUCKER CREEK 8880 12.0 12.6 95 13.6 13.7 99
TIE CREEK 6870 7.5 -M * 13.0 11.5 113
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Basin wide percent of average 94 101
BELLE FOURCHE
BLIND PARK 6890 8.6 11.3 76 13.4 10.6 126
NORTH RAPID CREEK 6130 9.9 -M * 10.7 -M *
WARREN PEAK 6520 12.7 11.3 112 11.0 8.4 131
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Basin wide percent of average 94 128
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.5 24.7 83 22.2 25.1 88
DIVIDE PEAK 8800 19.9 21.5 93 20.5 23.6 87
ELK RIVER 8700 16.3 20.1 81 18.6 19.7 94
JOE WRIGHT 10120 20.2 22.9 88 23.2 25.9 90
NORTH FRENCH CREEK 10100 30.9 26.5 117 28.9 24.3 119
OLD BATTLE 10000 31.9 33.5 95 34.7 31.1 112
SOUTH BRUSH CREEK 8400 9.0 13.3 68 12.6 17.0 74
TOWER 10500 45.4 46.7 97 37.4 37.4 100
WEBBER SPRINGS 9200 19.6 28.4 69 25.3 26.1 97
WILLOW CREEK PASS 9540 7.5 12.5 60 7.5 13.1 57
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Basin wide percent of average 88 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 21.9 27.3 80 21.3 20.1 106
CASPER MTN. 7900 12.6 17.5 72 12.6 14.8 85
DEADMAN HILL 10220 14.7 17.0 86 14.2 17.4 82
DEER PARK 9700 -M -M * 21.5 -M *
LAPRELE CREEK 8320 9.7 10.4 93 11.3 12.3 92
RENO HILL 8400 12.6 14.8 85 11.8 19.7 60
ROACH 9700 14.8 17.7 84 16.8 21.9 77
SAND LAKE 10080 27.3 34.0 80 23.9 21.1 113
SOUTH PASS 9040 16.2 16.8 96 18.1 17.7 102
WINDY PEAK 7840 7.4 9.0 82 9.1 10.0 91
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Basin wide percent of average 83 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.9 11.2 106 15.8 15.8 100
DIVIDE PEAK 8800 19.9 21.5 93 20.5 23.6 87
OLD BATTLE 10000 31.9 33.5 95 34.7 31.1 112
SANDSTONE RS 8150 14.6 15.1 97 19.4 19.3 101
WHISKEY PARK 8950 28.3 29.6 96 27.8 29.2 95
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Basin wide percent of average 96 99
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.9 15.0 86 12.1 16.9 72
BLIND BULL SUM 8650 25.2 30.2 83 20.0 25.0 80
EAST RIM DIVIDE 7930 12.9 14.4 90 13.0 15.8 82
ELKHART PARK G.S. 9400 13.3 14.3 93 13.8 16.6 83
GROS VENTRE SUMMIT 8775 12.2 15.9 77 13.3 16.6 80
KENDALL R.S. 7740 14.7 14.1 104 15.6 16.2 96
LOOMIS PARK 8240 12.3 17.4 71 17.9 19.7 91
NEW FORK LAKE 8340 11.7 11.1 105 11.0 15.1 73
SNIDER BASIN 8250 12.8 15.1 85 13.1 15.8 83
SPRING CREEK DIVIDE 9000 21.8 28.7 76 22.4 28.6 78
TRIPLE PEAK 8500 22.0 26.3 84 22.9 32.2 71
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Basin wide percent of average 85 80
LOWER GREEN RIVER
HAMS FORK 7840 11.0 9.9 111 12.1 14.0 86
HEWINTA 9500 12.1 10.6 114 15.5 13.6 114
HICKERSON PARK 9150 12.6 6.8 185 13.4 10.0 134
HOLE-IN-ROCK 9150 10.0 6.4 156 11.7 10.0 117
INDIAN CREEK 9425 25.6 29.5 87 20.5 27.0 76
KELLEY R.S. 8180 16.2 17.4 93 17.0 19.6 87
STEEL CREEK PARK 10100 17.3 17.1 101 19.0 13.4 142
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Basin wide percent of average 107 101
UPPER BEAR RIVER
BUG LAKE 7950 20.6 20.8 99 21.6 20.1 107
HAYDEN FORK 9400 13.8 14.5 95 20.9 19.8 106
KELLEY R.S. 8180 16.2 17.4 93 17.0 19.6 87
LILY LAKE 9050 15.1 13.2 114 18.2 15.3 119
MONTE CRISTO 8960 30.9 29.7 104 27.6 26.5 104
SALT RIVER SUMMIT 7600 15.4 14.3 108 18.7 17.6 106
TRIAL LAKE 9960 22.1 25.4 87 23.8 24.7 96
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Basin wide percent of average 99 103
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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.