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 FRIDAY: MAY 1 , 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 10.9 10.7 102 22.9 25.2 91
COTTONWOOD CREEK 7600 16.5 20.0 83 25.6 28.2 91
GRANITE CREEK 6770 12.4 12.9 96 22.3 26.8 83
GRASSY LAKE 7265 29.1 33.9 86 38.5 41.9 92
GROS VENTRE SUMMIT 8775 11.7 13.9 84 14.9 18.1 82
LEWIS LAKE DIVIDE 7860 29.4 34.4 85 35.3 42.6 83
PHILLIPS BENCH 8200 27.0 29.5 92 29.0 33.6 86
SALT RIVER SUMMIT 7600 11.3 10.8 105 20.3 19.2 106
SNAKE RIVER STATION 6920 12.7 16.4 77 24.8 29.4 84
SPRING CREEK DIVIDE 9000 22.1 29.6 75 24.2 30.8 79
THUMB DIVIDE 7980 14.3 15.1 95 20.0 23.6 85
TOGWOTEE PASS 9580 25.0 28.3 88 26.7 31.9 84
TWO OCEAN PLATEAU 9360 30.7 27.6 111 30.3 34.7 87
WILLOW CREEK 8450 23.4 31.9 73 35.0 36.2 97
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Basin wide percent of average 88 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.1 26.0 77 18.3 21.2 86
BLACK BEAR 7950 40.2 39.8 101 39.9 46.5 86
CANYON 7940 10.4 10.9 95 16.4 16.3 101
FISHER CREEK 9100 29.8 38.7 77 30.9 42.2 73
MADISON PLATEAU 7750 20.2 23.8 85 25.7 29.9 86
NORTHEAST ENTRANCE 7350 .5 5.9 8 12.7 13.9 91
PARKER PEAK 9400 19.1 23.7 81 17.9 18.2 98
SYLVAN LAKE 8420 16.3 23.8 68 22.6 22.3 101
THUMB DIVIDE 7980 14.3 15.1 95 20.0 23.6 85
TWO OCEAN PLATEAU 9360 30.7 27.6 111 30.3 34.7 87
WHISKEY CREEK 6800 14.9 15.2 98 21.3 24.9 86
WHITE MILL 8700 23.1 26.3 88 23.1 32.6 71
WOLVERINE 7650 2.6 8.1 32 10.9 15.2 72
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Basin wide percent of average 85 85
WIND RIVER
BURROUGHS CREEK 8750 16.1 12.9 125 19.3 19.4 99
COLD SPRINGS 9630 9.8 6.8 144 14.8 13.1 113
DEER PARK 9700 -M -M * 24.6 -M *
HOBBS PARK 10100 19.2 18.0 107 18.2 17.3 105
LITTLE WARM 9620 10.7 10.4 103 15.9 16.3 98
SOUTH PASS 9040 15.9 18.1 88 21.1 20.6 102
ST. LAWRENCE ALT 8620 9.7 5.4 180 12.9 12.5 103
TOGWOTEE PASS 9580 25.0 28.3 88 26.7 31.9 84
TOWNSEND CREEK 8700 11.3 9.5 119 17.1 15.5 110
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Basin wide percent of average 108 100
BIGHORN BASIN
BALD MTN. 9375 22.2 24.1 92 20.4 20.8 98
BEAR TRAP MEADOW 7900 3.0 4.2 71 11.7 10.6 110
BLACKWATER 9780 21.9 25.7 85 20.5 20.6 100
BONE SPRINGS DIV 9350 20.3 18.4 110 19.9 18.1 110
EVENING STAR 9200 22.6 30.8 73 27.1 25.9 105
GRAVE SPRINGS 8550 11.7 -M * 13.9 12.4 112
KIRWIN 9550 12.8 11.7 109 15.9 13.3 120
MARQUETTE 8760 14.2 8.6 165 16.5 13.5 122
MIDDLE POWDER 7760 12.1 14.8 82 13.4 14.8 91
OWL CREEK 8975 6.5 3.4 191 9.8 8.1 121
POWDER RIVER PASS 9480 11.9 10.5 113 16.1 14.7 110
SHELL CREEK 9580 15.8 17.0 93 13.8 15.9 87
SYLVAN LAKE 8420 16.3 23.8 68 22.6 22.3 101
SYLVAN ROAD 8120 5.4 7.9 68 15.2 18.6 82
TIMBER CREEK 7950 8.2 6.0 137 12.7 10.0 127
YOUNTS PEAK 8350 15.6 18.3 85 16.8 19.3 87
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Basin wide percent of average 93 103
SHOSHONE RIVER
BLACKWATER 9780 21.9 25.7 85 20.5 20.6 100
EVENING STAR 9200 22.6 30.8 73 27.1 25.9 105
KIRWIN 9550 12.8 11.7 109 15.9 13.3 120
MARQUETTE 8760 14.2 8.6 165 16.5 13.5 122
SYLVAN LAKE 8420 16.3 23.8 68 22.6 22.3 101
SYLVAN ROAD 8120 5.4 7.9 68 15.2 18.6 82
YOUNTS PEAK 8350 15.6 18.3 85 16.8 19.3 87
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Basin wide percent of average 86 101
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.0 4.2 71 11.7 10.6 110
BONE SPRINGS DIV 9350 20.3 18.4 110 19.9 18.1 110
BURGESS JUNCTION 7880 12.1 13.5 90 15.1 14.4 105
CLOUD PEAK RESERVOIR 9860 17.1 17.7 97 19.8 17.1 116
DOME LAKE 8880 -M 15.0 * 16.4 16.4 100
GRAVE SPRINGS 8550 11.7 -M * 13.9 12.4 112
HANSEN SAWMILL 8760 7.5 6.9 109 13.6 10.3 132
MIDDLE POWDER 7760 12.1 14.8 82 13.4 14.8 91
POWDER RIVER PASS 9480 11.9 10.5 113 16.1 14.7 110
SUCKER CREEK 8880 12.5 13.8 91 16.9 16.5 102
TIE CREEK 6870 5.6 -M * 16.3 13.8 118
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Basin wide percent of average 97 109
BELLE FOURCHE
BLIND PARK 6890 1.0 9.6 10 13.9 13.8 101
NORTH RAPID CREEK 6130 3.7 -M * 11.8 -M *
WARREN PEAK 6520 7.7 9.6 80 12.5 10.3 121
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Basin wide percent of average 45 110
UPPER N. PLATTE RIVER
COLUMBINE 9400 13.6 22.1 62 25.5 28.1 91
DIVIDE PEAK 8800 16.5 19.3 85 22.4 27.3 82
ELK RIVER 8700 11.5 16.2 71 22.7 22.1 103
JOE WRIGHT 10120 23.2 24.7 94 27.3 30.3 90
NORTH FRENCH CREEK 10100 32.6 29.4 111 32.6 28.0 116
OLD BATTLE 10000 35.1 38.2 92 38.9 35.7 109
SOUTH BRUSH CREEK 8400 3.0 10.6 28 14.4 20.6 70
TOWER 10500 53.6 51.1 105 45.0 43.2 104
WEBBER SPRINGS 9200 19.2 26.0 74 28.6 30.6 93
WILLOW CREEK PASS 9540 9.4 13.5 70 9.6 15.4 62
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Basin wide percent of average 87 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.4 28.9 84 24.7 23.8 104
CASPER MTN. 7900 10.2 17.8 57 15.0 18.8 80
DEADMAN HILL 10220 16.9 19.1 88 17.1 21.1 81
DEER PARK 9700 -M -M * 24.6 -M *
LAPRELE CREEK 8320 3.3 6.3 52 12.7 14.7 86
RENO HILL 8400 9.6 13.4 72 13.6 22.4 61
ROACH 9700 14.8 18.1 82 19.5 25.8 76
SAND LAKE 10080 30.6 37.2 82 27.3 24.8 110
SOUTH PASS 9040 15.9 18.1 88 21.1 20.6 102
WINDY PEAK 7840 3.4 7.9 43 10.7 12.2 88
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Basin wide percent of average 77 88
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.3 4.8 69 17.6 18.5 95
DIVIDE PEAK 8800 16.5 19.3 85 22.4 27.3 82
OLD BATTLE 10000 35.1 38.2 92 38.9 35.7 109
SANDSTONE RS 8150 7.0 9.8 71 21.5 23.0 93
WHISKEY PARK 8950 28.7 29.6 97 31.1 34.0 91
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Basin wide percent of average 89 95
UPPER GREEN RIVER
BIG SANDY OPENING 9100 11.9 13.9 86 14.0 18.5 76
BLIND BULL SUM 8650 23.7 22.7 104 20.9 26.9 78
EAST RIM DIVIDE 7930 12.3 14.8 83 13.3 17.3 77
ELKHART PARK G.S. 9400 11.7 14.0 84 15.4 18.2 85
GROS VENTRE SUMMIT 8775 11.7 13.9 84 14.9 18.1 82
KENDALL R.S. 7740 8.6 10.6 81 16.7 17.6 95
LOOMIS PARK 8240 -M 15.1 * 19.1 21.4 89
NEW FORK LAKE 8340 7.4 9.1 81 12.7 16.4 77
SNIDER BASIN 8250 11.9 13.0 92 14.1 17.2 82
SPRING CREEK DIVIDE 9000 22.1 29.6 75 24.2 30.8 79
TRIPLE PEAK 8500 17.6 25.0 70 24.2 35.0 69
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Basin wide percent of average 83 80
LOWER GREEN RIVER
HAMS FORK 7840 4.4 5.7 77 13.1 15.2 86
HEWINTA 9500 9.1 5.3 172 17.3 16.3 106
HICKERSON PARK 9150 11.6 2.9 400 15.5 12.3 126
HOLE-IN-ROCK 9150 8.4 2.3 365 13.4 12.3 109
INDIAN CREEK 9425 23.9 28.9 83 21.9 29.2 75
KELLEY R.S. 8180 12.7 15.0 85 18.4 21.3 86
STEEL CREEK PARK 10100 20.7 18.9 110 21.7 16.1 135
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Basin wide percent of average 115 99
UPPER BEAR RIVER
BUG LAKE 7950 17.7 16.0 111 23.5 22.6 104
HAYDEN FORK 9400 11.0 6.6 167 23.7 23.0 103
KELLEY R.S. 8180 12.7 15.0 85 18.4 21.3 86
LILY LAKE 9050 12.2 8.7 140 20.7 18.0 115
MONTE CRISTO 8960 28.1 26.2 107 29.5 30.3 97
SALT RIVER SUMMIT 7600 11.3 10.8 105 20.3 19.2 106
TRIAL LAKE 9960 23.9 24.0 100 26.4 28.3 93
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Basin wide percent of average 109 100
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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.