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 WEDNESDAY: APRIL 15 , 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 14.5 16.0 91 21.2 23.9 89
COTTONWOOD CREEK 7600 21.7 23.3 93 25.1 26.9 93
GRANITE CREEK 6770 15.8 17.8 89 21.5 25.3 85
GRASSY LAKE 7265 32.5 37.8 86 36.6 39.9 92
GROS VENTRE SUMMIT 8775 12.1 16.0 76 13.6 17.1 80
LEWIS LAKE DIVIDE 7860 32.6 36.8 89 34.2 40.5 84
PHILLIPS BENCH 8200 27.5 30.9 89 27.4 32.0 86
SALT RIVER SUMMIT 7600 15.9 13.8 115 19.6 18.2 108
SNAKE RIVER STATION 6920 17.2 18.6 92 23.3 28.0 83
SPRING CREEK DIVIDE 9000 23.3 29.4 79 23.6 29.4 80
THUMB DIVIDE 7980 17.1 17.4 98 18.8 22.4 84
TOGWOTEE PASS 9580 25.2 27.0 93 25.1 30.4 83
TWO OCEAN PLATEAU 9360 29.8 26.6 112 28.4 32.9 86
WILLOW CREEK 8450 29.4 31.7 93 34.0 34.4 99
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Basin wide percent of average 92 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.3 25.5 80 17.6 19.6 90
BLACK BEAR 7950 41.5 40.2 103 38.6 43.7 88
CANYON 7940 13.3 13.5 99 15.7 15.3 103
FISHER CREEK 9100 32.0 37.9 84 29.3 39.5 74
MADISON PLATEAU 7750 22.9 25.6 89 24.8 28.2 88
NORTHEAST ENTRANCE 7350 6.2 9.0 69 12.4 12.8 97
PARKER PEAK 9400 20.1 23.2 87 17.4 16.9 103
SYLVAN LAKE 8420 18.9 23.9 79 21.6 20.7 104
THUMB DIVIDE 7980 17.1 17.4 98 18.8 22.4 84
TWO OCEAN PLATEAU 9360 29.8 26.6 112 28.4 32.9 86
WHISKEY CREEK 6800 15.9 18.2 87 20.5 23.5 87
WHITE MILL 8700 24.5 25.8 95 22.5 30.5 74
WOLVERINE 7650 8.8 11.8 75 10.7 13.9 77
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Basin wide percent of average 91 87
WIND RIVER
BURROUGHS CREEK 8750 16.7 15.3 109 18.2 18.0 101
COLD SPRINGS 9630 11.9 8.7 137 13.4 11.8 114
DEER PARK 9700 -M -M * 22.9 -M *
HOBBS PARK 10100 17.7 16.5 107 15.7 15.6 101
LITTLE WARM 9620 12.1 13.5 90 14.8 14.7 101
SOUTH PASS 9040 17.2 17.6 98 19.4 18.7 104
ST. LAWRENCE ALT 8620 11.4 7.1 161 11.5 11.3 102
TOGWOTEE PASS 9580 25.2 27.0 93 25.1 30.4 83
TOWNSEND CREEK 8700 12.4 10.4 119 15.2 13.9 109
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Basin wide percent of average 107 99
BIGHORN BASIN
BALD MTN. 9375 21.4 22.3 96 18.8 19.0 99
BEAR TRAP MEADOW 7900 7.6 6.9 110 10.0 9.3 108
BLACKWATER 9780 21.7 24.7 88 19.4 19.3 101
BONE SPRINGS DIV 9350 18.7 18.1 103 17.7 16.5 107
EVENING STAR 9200 24.1 29.2 83 26.0 24.2 107
GRAVE SPRINGS 8550 12.2 -M * 12.7 10.9 117
KIRWIN 9550 13.9 11.1 125 15.0 12.0 125
MARQUETTE 8760 15.0 8.7 172 15.1 11.4 132
MIDDLE POWDER 7760 12.7 13.6 93 12.3 13.2 93
OWL CREEK 8975 8.7 4.7 185 8.3 7.1 117
POWDER RIVER PASS 9480 14.1 11.6 122 14.9 13.0 115
SHELL CREEK 9580 16.2 16.2 100 12.6 14.4 88
SYLVAN LAKE 8420 18.9 23.9 79 21.6 20.7 104
SYLVAN ROAD 8120 10.2 10.8 94 15.0 17.3 87
TIMBER CREEK 7950 -M 6.6 * 12.1 8.4 144
YOUNTS PEAK 8350 15.6 18.3 85 16.0 17.9 89
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Basin wide percent of average 99 105
SHOSHONE RIVER
BLACKWATER 9780 21.7 24.7 88 19.4 19.3 101
EVENING STAR 9200 24.1 29.2 83 26.0 24.2 107
KIRWIN 9550 13.9 11.1 125 15.0 12.0 125
MARQUETTE 8760 15.0 8.7 172 15.1 11.4 132
SYLVAN LAKE 8420 18.9 23.9 79 21.6 20.7 104
SYLVAN ROAD 8120 10.2 10.8 94 15.0 17.3 87
YOUNTS PEAK 8350 15.6 18.3 85 16.0 17.9 89
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Basin wide percent of average 94 104
POWDER-TONGUE
BEAR TRAP MEADOW 7900 7.6 6.9 110 10.0 9.3 108
BONE SPRINGS DIV 9350 18.7 18.1 103 17.7 16.5 107
BURGESS JUNCTION 7880 12.3 12.9 95 13.5 12.9 105
CLOUD PEAK RESERVOIR 9860 17.4 16.8 104 -M 15.1 *
DOME LAKE 8880 11.1 14.8 75 15.0 14.7 102
GRAVE SPRINGS 8550 12.2 -M * 12.7 10.9 117
HANSEN SAWMILL 8760 -M 7.6 * -M 9.0 *
MIDDLE POWDER 7760 12.7 13.6 93 12.3 13.2 93
POWDER RIVER PASS 9480 14.1 11.6 122 14.9 13.0 115
SUCKER CREEK 8880 13.5 13.3 102 15.0 14.7 102
TIE CREEK 6870 8.4 -M * 14.9 12.3 121
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Basin wide percent of average 99 107
BELLE FOURCHE
BLIND PARK 6890 8.0 11.6 69 13.6 11.8 115
NORTH RAPID CREEK 6130 9.0 -M * 11.1 -M *
WARREN PEAK 6520 12.2 11.6 105 11.5 9.1 126
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Basin wide percent of average 87 120
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.9 24.4 77 23.7 26.2 90
DIVIDE PEAK 8800 20.8 21.8 95 21.7 24.9 87
ELK RIVER 8700 17.6 20.4 86 20.7 20.6 100
JOE WRIGHT 10120 22.4 24.2 93 25.1 27.5 91
NORTH FRENCH CREEK 10100 34.0 28.2 121 31.1 25.6 121
OLD BATTLE 10000 34.4 35.8 96 37.0 32.8 113
SOUTH BRUSH CREEK 8400 7.3 13.0 56 13.8 18.3 75
TOWER 10500 50.3 49.0 103 41.0 39.5 104
WEBBER SPRINGS 9200 20.9 28.6 73 26.8 27.7 97
WILLOW CREEK PASS 9540 8.1 13.5 60 8.0 13.9 58
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Basin wide percent of average 91 97
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.7 29.0 82 22.8 21.5 106
CASPER MTN. 7900 13.3 19.0 70 14.1 16.2 87
DEADMAN HILL 10220 15.9 17.8 89 15.6 18.8 83
DEER PARK 9700 -M -M * 22.9 -M *
LAPRELE CREEK 8320 9.2 10.0 92 12.3 13.2 93
RENO HILL 8400 13.4 15.5 86 13.1 20.7 63
ROACH 9700 16.0 18.1 88 18.2 23.3 78
SAND LAKE 10080 29.4 35.7 82 25.8 22.4 115
SOUTH PASS 9040 17.2 17.6 98 19.4 18.7 104
WINDY PEAK 7840 7.6 9.3 82 10.2 10.8 94
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Basin wide percent of average 85 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.0 10.9 101 16.6 16.8 99
DIVIDE PEAK 8800 20.8 21.8 95 21.7 24.9 87
OLD BATTLE 10000 34.4 35.8 96 37.0 32.8 113
SANDSTONE RS 8150 14.9 15.3 97 20.8 20.7 100
WHISKEY PARK 8950 30.2 30.7 98 30.0 30.9 97
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Basin wide percent of average 97 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.6 15.4 88 12.8 17.5 73
BLIND BULL SUM 8650 25.8 31.0 83 20.6 25.7 80
EAST RIM DIVIDE 7930 13.2 15.0 88 13.0 16.3 80
ELKHART PARK G.S. 9400 13.6 15.0 91 14.3 17.2 83
GROS VENTRE SUMMIT 8775 12.1 16.0 76 13.6 17.1 80
KENDALL R.S. 7740 13.8 13.1 105 15.9 16.7 95
LOOMIS PARK 8240 -M 16.9 * 18.2 20.3 90
NEW FORK LAKE 8340 11.5 10.7 107 11.5 15.5 74
SNIDER BASIN 8250 13.5 15.5 87 13.7 16.3 84
SPRING CREEK DIVIDE 9000 23.3 29.4 79 23.6 29.4 80
TRIPLE PEAK 8500 22.2 26.9 83 23.6 33.2 71
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Basin wide percent of average 86 80
LOWER GREEN RIVER
HAMS FORK 7840 10.8 5.7 189 12.7 14.4 88
HEWINTA 9500 14.0 9.0 156 16.2 14.6 111
HICKERSON PARK 9150 14.1 6.6 214 14.0 10.8 130
HOLE-IN-ROCK 9150 11.0 6.2 177 12.4 10.8 115
INDIAN CREEK 9425 26.5 30.4 87 21.3 27.8 77
KELLEY R.S. 8180 16.2 17.6 92 17.7 20.2 88
STEEL CREEK PARK 10100 18.4 17.9 103 20.2 14.3 141
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Basin wide percent of average 119 101
UPPER BEAR RIVER
BUG LAKE 7950 21.9 20.0 110 22.7 21.0 108
HAYDEN FORK 9400 14.3 10.8 132 22.1 20.9 106
KELLEY R.S. 8180 16.2 17.6 92 17.7 20.2 88
LILY LAKE 9050 15.6 12.9 121 19.3 16.3 118
MONTE CRISTO 8960 32.5 29.3 111 29.0 27.8 104
SALT RIVER SUMMIT 7600 15.9 13.8 115 19.6 18.2 108
TRIAL LAKE 9960 24.2 26.0 93 25.4 26.0 98
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Basin wide percent of average 108 104
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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.