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 THURSDAY: APRIL 30 , 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 11.5 11.0 105 23.0 25.1 92
COTTONWOOD CREEK 7600 17.2 20.2 85 25.6 28.1 91
GRANITE CREEK 6770 13.0 13.2 98 22.3 26.7 84
GRASSY LAKE 7265 29.9 34.1 88 38.4 41.8 92
GROS VENTRE SUMMIT 8775 12.0 14.0 86 14.9 18.0 83
LEWIS LAKE DIVIDE 7860 30.4 34.6 88 35.3 42.5 83
PHILLIPS BENCH 8200 27.5 29.6 93 29.0 33.5 87
SALT RIVER SUMMIT 7600 12.1 11.0 110 20.2 19.1 106
SNAKE RIVER STATION 6920 13.5 16.5 82 24.8 29.3 85
SPRING CREEK DIVIDE 9000 22.6 29.6 76 24.2 30.7 79
THUMB DIVIDE 7980 15.0 15.2 99 20.0 23.5 85
TOGWOTEE PASS 9580 25.2 28.2 89 26.7 31.8 84
TWO OCEAN PLATEAU 9360 30.9 27.5 112 30.3 34.6 88
WILLOW CREEK 8450 24.5 31.9 77 35.0 36.1 97
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Basin wide percent of average 90 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.1 26.0 77 18.3 21.1 87
BLACK BEAR 7950 -M 39.8 * 39.9 46.3 86
CANYON 7940 11.1 11.1 100 16.4 16.2 101
FISHER CREEK 9100 30.0 38.7 78 30.8 42.0 73
MADISON PLATEAU 7750 20.6 23.9 86 25.7 29.8 86
NORTHEAST ENTRANCE 7350 .9 6.1 15 12.7 13.8 92
PARKER PEAK 9400 -M 23.7 * 17.9 18.1 99
SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102
THUMB DIVIDE 7980 15.0 15.2 99 20.0 23.5 85
TWO OCEAN PLATEAU 9360 30.9 27.5 112 30.3 34.6 88
WHISKEY CREEK 6800 15.2 15.4 99 21.3 24.8 86
WHITE MILL 8700 23.4 26.3 89 23.1 32.5 71
WOLVERINE 7650 3.8 8.3 46 10.9 15.1 72
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Basin wide percent of average 85 85
WIND RIVER
BURROUGHS CREEK 8750 16.4 13.1 125 19.3 19.3 100
COLD SPRINGS 9630 10.4 6.9 151 14.8 13.0 114
DEER PARK 9700 -M -M * 24.6 -M *
HOBBS PARK 10100 19.5 17.9 109 18.2 17.2 106
LITTLE WARM 9620 11.2 10.6 106 15.9 16.2 98
SOUTH PASS 9040 16.4 18.1 91 21.1 20.5 103
ST. LAWRENCE ALT 8620 10.2 5.5 185 12.9 12.4 104
TOGWOTEE PASS 9580 25.2 28.2 89 26.7 31.8 84
TOWNSEND CREEK 8700 11.6 9.6 121 17.0 15.4 110
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Basin wide percent of average 110 100
BIGHORN BASIN
BALD MTN. 9375 22.5 24.0 94 20.4 20.7 99
BEAR TRAP MEADOW 7900 3.8 4.4 86 11.6 10.5 110
BLACKWATER 9780 22.3 25.6 87 20.5 20.5 100
BONE SPRINGS DIV 9350 -M 18.4 * 19.9 18.0 111
EVENING STAR 9200 23.0 30.7 75 27.1 25.8 105
GRAVE SPRINGS 8550 12.0 -M * 13.9 12.3 113
KIRWIN 9550 13.0 11.7 111 15.9 13.2 120
MARQUETTE 8760 14.4 8.6 167 16.5 13.4 123
MIDDLE POWDER 7760 12.4 14.7 84 13.4 14.7 91
OWL CREEK 8975 7.1 3.5 203 9.8 8.0 123
POWDER RIVER PASS 9480 12.4 10.6 117 16.1 14.6 110
SHELL CREEK 9580 -M 17.0 * 13.8 15.8 87
SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102
SYLVAN ROAD 8120 6.1 8.1 75 15.3 18.5 83
TIMBER CREEK 7950 8.5 6.0 142 12.7 9.9 128
YOUNTS PEAK 8350 15.8 18.3 86 16.8 19.2 88
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Basin wide percent of average 94 103
SHOSHONE RIVER
BLACKWATER 9780 22.3 25.6 87 20.5 20.5 100
EVENING STAR 9200 23.0 30.7 75 27.1 25.8 105
KIRWIN 9550 13.0 11.7 111 15.9 13.2 120
MARQUETTE 8760 14.4 8.6 167 16.5 13.4 123
SYLVAN LAKE 8420 16.9 23.8 71 22.6 22.2 102
SYLVAN ROAD 8120 6.1 8.1 75 15.3 18.5 83
YOUNTS PEAK 8350 15.8 18.3 86 16.8 19.2 88
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Basin wide percent of average 88 101
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.8 4.4 86 11.6 10.5 110
BONE SPRINGS DIV 9350 -M 18.4 * 19.9 18.0 111
BURGESS JUNCTION 7880 12.6 13.5 93 15.1 14.3 106
CLOUD PEAK RESERVOIR 9860 18.2 17.6 103 19.8 17.0 116
DOME LAKE 8880 -M 15.0 * 16.4 16.3 101
GRAVE SPRINGS 8550 12.0 -M * 13.9 12.3 113
HANSEN SAWMILL 8760 8.3 6.9 120 13.6 10.2 133
MIDDLE POWDER 7760 12.4 14.7 84 13.4 14.7 91
POWDER RIVER PASS 9480 12.4 10.6 117 16.1 14.6 110
SUCKER CREEK 8880 12.9 13.8 93 16.9 16.4 103
TIE CREEK 6870 6.3 -M * 16.3 13.7 119
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Basin wide percent of average 99 109
BELLE FOURCHE
BLIND PARK 6890 2.2 9.7 23 13.9 13.7 101
NORTH RAPID CREEK 6130 4.7 -M * 11.8 -M *
WARREN PEAK 6520 8.6 9.7 89 12.4 10.2 122
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Basin wide percent of average 56 110
UPPER N. PLATTE RIVER
COLUMBINE 9400 14.8 22.2 67 25.5 28.0 91
DIVIDE PEAK 8800 17.5 19.5 90 22.5 27.2 83
ELK RIVER 8700 12.2 16.5 74 22.2 22.0 101
JOE WRIGHT 10120 23.2 24.7 94 27.3 30.1 91
NORTH FRENCH CREEK 10100 33.4 29.3 114 32.6 27.9 117
OLD BATTLE 10000 35.2 38.1 92 38.9 35.5 110
SOUTH BRUSH CREEK 8400 3.5 10.8 32 14.4 20.5 70
TOWER 10500 53.6 51.0 105 45.1 43.0 105
WEBBER SPRINGS 9200 19.8 26.2 76 28.7 30.4 94
WILLOW CREEK PASS 9540 9.7 13.5 72 9.5 15.3 62
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Basin wide percent of average 89 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.9 28.9 86 24.7 23.7 104
CASPER MTN. 7900 10.7 17.9 60 15.0 18.6 81
DEADMAN HILL 10220 17.1 19.0 90 17.1 21.0 81
DEER PARK 9700 -M -M * 24.6 -M *
LAPRELE CREEK 8320 4.3 6.5 66 12.7 14.6 87
RENO HILL 8400 10.2 13.5 76 13.7 22.3 61
ROACH 9700 15.1 18.1 83 19.5 25.6 76
SAND LAKE 10080 31.0 37.1 84 27.3 24.7 111
SOUTH PASS 9040 16.4 18.1 91 21.1 20.5 103
WINDY PEAK 7840 4.2 8.0 53 10.8 12.1 89
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Basin wide percent of average 80 88
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 4.3 5.2 83 17.6 18.4 96
DIVIDE PEAK 8800 17.5 19.5 90 22.5 27.2 83
OLD BATTLE 10000 35.2 38.1 92 38.9 35.5 110
SANDSTONE RS 8150 8.5 10.1 84 21.5 22.9 94
WHISKEY PARK 8950 28.9 29.7 97 31.1 33.8 92
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Basin wide percent of average 92 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.3 14.0 88 13.9 18.4 76
BLIND BULL SUM 8650 23.9 23.2 103 20.9 26.8 78
EAST RIM DIVIDE 7930 12.7 14.8 86 13.3 17.2 77
ELKHART PARK G.S. 9400 9.4 14.1 67 15.4 18.1 85
GROS VENTRE SUMMIT 8775 12.0 14.0 86 14.9 18.0 83
KENDALL R.S. 7740 9.3 10.8 86 16.7 17.5 95
LOOMIS PARK 8240 -M 15.2 * 19.1 21.3 90
NEW FORK LAKE 8340 8.2 9.2 89 12.6 16.3 77
SNIDER BASIN 8250 12.4 13.2 94 14.1 17.1 82
SPRING CREEK DIVIDE 9000 22.6 29.6 76 24.2 30.7 79
TRIPLE PEAK 8500 18.3 25.1 73 24.2 34.9 69
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Basin wide percent of average 84 80
LOWER GREEN RIVER
HAMS FORK 7840 5.4 5.7 95 13.1 15.2 86
HEWINTA 9500 9.7 5.5 176 17.3 16.2 107
HICKERSON PARK 9150 12.2 3.1 394 15.4 12.2 126
HOLE-IN-ROCK 9150 8.8 2.5 352 13.4 12.2 110
INDIAN CREEK 9425 24.6 29.0 85 21.9 29.1 75
KELLEY R.S. 8180 13.6 15.2 89 18.4 21.2 87
STEEL CREEK PARK 10100 20.8 18.8 111 21.7 16.0 136
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Basin wide percent of average 119 99
UPPER BEAR RIVER
BUG LAKE 7950 18.3 16.2 113 23.5 22.5 104
HAYDEN FORK 9400 11.8 6.9 171 23.6 22.9 103
KELLEY R.S. 8180 13.6 15.2 89 18.4 21.2 87
LILY LAKE 9050 12.8 9.0 142 20.7 17.9 116
MONTE CRISTO 8960 29.2 26.4 111 29.6 30.1 98
SALT RIVER SUMMIT 7600 12.1 11.0 110 20.2 19.1 106
TRIAL LAKE 9960 24.6 24.1 102 26.4 28.2 94
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Basin wide percent of average 113 100
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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.