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: MAY 31 , 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 1.3 .3 433* 25.6 27.8 92
COTTONWOOD CREEK 7600 .0 .8 0* 30.1 31.0 97
GRANITE CREEK 6770 .3 2.0 15 25.9 29.7 87
GRASSY LAKE 7265 12.7 12.9 98 43.3 46.2 94
GROS VENTRE SUMMIT 8775 .5 .6 83* 17.2 20.0 86
LEWIS LAKE DIVIDE 7860 14.6 20.4 72 38.8 47.0 83
PHILLIPS BENCH 8200 16.6 18.1 92 31.9 37.0 86
SALT RIVER SUMMIT 7600 1.0 .0 * 25.3 21.3 119
SNAKE RIVER STATION 6920 .0 .7 0* 28.0 32.4 86
SPRING CREEK DIVIDE 9000 15.4 19.4 79 27.3 33.7 81
THUMB DIVIDE 7980 .1 .7 14* 22.7 26.0 87
TOGWOTEE PASS 9580 20.8 23.7 88 29.4 35.2 84
TWO OCEAN PLATEAU 9360 24.1 22.7 106 33.7 38.3 88
WILLOW CREEK 8450 7.7 19.7 39 39.6 39.9 99
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Basin wide percent of average 80 90
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 12.1 19.7 61 19.7 24.9 79
BLACK BEAR 7950 32.5 28.1 116 45.8 50.5 91
CANYON 7940 .0 1.7 0 17.8 18.8 95
FISHER CREEK 9100 22.3 32.0 70 33.7 46.8 72
MADISON PLATEAU 7750 8.9 8.2 109 30.2 33.2 91
NORTHEAST ENTRANCE 7350 .0 .3 0* 13.9 16.4 85
PARKER PEAK 9400 10.1 18.8 54 20.2 21.4 94
SYLVAN LAKE 8420 4.6 14.5 32 26.3 26.2 100
THUMB DIVIDE 7980 .1 .7 14* 22.7 26.0 87
TWO OCEAN PLATEAU 9360 24.1 22.7 106 33.7 38.3 88
WHISKEY CREEK 6800 .3 1.7 18* 25.8 27.5 94
WHITE MILL 8700 15.6 19.7 79 25.5 36.5 70
WOLVERINE 7650 .0 .2 0* 11.4 18.0 63
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Basin wide percent of average 78 85
WIND RIVER
BURROUGHS CREEK 8750 2.4 2.3 104 21.0 22.4 94
COLD SPRINGS 9630 .0 .4 0* 16.7 16.0 104
DEER PARK 9700 -M -M * 26.5 -M *
HOBBS PARK 10100 10.4 9.7 107 20.8 20.8 100
LITTLE WARM 9620 .0 1.0 0* 17.8 19.2 93
SOUTH PASS 9040 1.0 10.4 10 22.9 23.9 96
ST. LAWRENCE ALT 8620 .1 .2 50* 15.0 14.7 102
TOGWOTEE PASS 9580 20.8 23.7 88 29.4 35.2 84
TOWNSEND CREEK 8700 .0 2.1 0 18.4 18.5 99
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Basin wide percent of average 70 95
BIGHORN BASIN
BALD MTN. 9375 12.7 18.8 68 21.3 25.2 85
BEAR TRAP MEADOW 7900 .0 .1 0* 13.0 13.8 94
BLACKWATER 9780 17.0 19.2 89 23.0 23.9 96
BONE SPRINGS DIV 9350 4.8 8.6 56 20.4 22.1 92
EVENING STAR 9200 14.7 25.8 57 29.8 29.8 100
GRAVE SPRINGS 8550 .0 -M * 15.8 16.1 98
KIRWIN 9550 1.7 5.4 31 17.8 16.1 111
MARQUETTE 8760 3.1 4.3 72 18.3 17.2 106
MIDDLE POWDER 7760 .0 3.2 0 15.1 18.1 83
OWL CREEK 8975 .0 .2 0* 11.4 10.6 108
POWDER RIVER PASS 9480 .0 1.6 0 17.6 18.1 97
SHELL CREEK 9580 2.1 11.5 18 14.8 19.7 75
SYLVAN LAKE 8420 4.6 14.5 32 26.3 26.2 100
SYLVAN ROAD 8120 .1 1.2 8* 17.3 21.7 80
TIMBER CREEK 7950 .0 .3 0* 13.8 13.7 101
YOUNTS PEAK 8350 4.4 9.5 46 19.0 22.2 86
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Basin wide percent of average 52 94
SHOSHONE RIVER
BLACKWATER 9780 17.0 19.2 89 23.0 23.9 96
EVENING STAR 9200 14.7 25.8 57 29.8 29.8 100
KIRWIN 9550 1.7 5.4 31 17.8 16.1 111
MARQUETTE 8760 3.1 4.3 72 18.3 17.2 106
SYLVAN LAKE 8420 4.6 14.5 32 26.3 26.2 100
SYLVAN ROAD 8120 .1 1.2 8* 17.3 21.7 80
YOUNTS PEAK 8350 4.4 9.5 46 19.0 22.2 86
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Basin wide percent of average 57 96
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 .1 0* 13.0 13.8 94
BONE SPRINGS DIV 9350 4.8 8.6 56 20.4 22.1 92
BURGESS JUNCTION 7880 .0 2.8 0 15.6 17.6 89
CLOUD PEAK RESERVOIR 9860 2.1 8.8 24 21.3 21.2 100
DOME LAKE 8880 .0 4.3 0 17.4 20.1 87
GRAVE SPRINGS 8550 .0 -M * 15.8 16.1 98
HANSEN SAWMILL 8760 .0 1.0 0 14.9 12.9 116
MIDDLE POWDER 7760 .0 3.2 0 15.1 18.1 83
POWDER RIVER PASS 9480 .0 1.6 0 17.6 18.1 97
SUCKER CREEK 8880 .0 4.4 0 17.8 20.4 87
TIE CREEK 6870 .0 -M * 17.2 16.9 102
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Basin wide percent of average 20 94
BELLE FOURCHE
BLIND PARK 6890 .0 .3 0* 16.0 18.1 88
NORTH RAPID CREEK 6130 .1 -M * 14.0 -M *
WARREN PEAK 6520 .0 .4 0* 13.5 13.2 102
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Basin wide percent of average 0* 94
UPPER N. PLATTE RIVER
COLUMBINE 9400 .0 3.4 0 27.2 30.8 88
DIVIDE PEAK 8800 .0 3.5 0 24.2 30.7 79
ELK RIVER 8700 .0 .7 0* 24.1 24.4 99
JOE WRIGHT 10120 11.4 17.5 65 30.2 34.8 87
NORTH FRENCH CREEK 10100 20.9 20.6 101 36.1 32.2 112
OLD BATTLE 10000 24.9 24.8 100 42.3 39.5 107
SOUTH BRUSH CREEK 8400 .0 1.3 0* 15.9 23.2 69
TOWER 10500 38.5 44.8 86 48.4 49.2 98
WEBBER SPRINGS 9200 .0 10.9 0 31.2 33.6 93
WILLOW CREEK PASS 9540 -M 2.7 * 11.4 18.2 63
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Basin wide percent of average 75 92
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 5.7 13.5 42 27.4 27.0 101
CASPER MTN. 7900 .1 4.0 3 16.0 22.8 70
DEADMAN HILL 10220 5.9 10.7 55 19.2 24.5 78
DEER PARK 9700 -M -M * 26.5 -M *
LAPRELE CREEK 8320 .0 1.1 0 13.4 18.0 74
RENO HILL 8400 .0 3.2 0 14.5 24.2 60
ROACH 9700 .6 8.0 8 22.0 30.1 73
SAND LAKE 10080 18.6 25.2 74 29.9 28.3 106
SOUTH PASS 9040 1.0 10.4 10 22.9 23.9 96
WINDY PEAK 7840 .0 .2 0* 11.9 15.6 76
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Basin wide percent of average 42 83
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 * 18.4 20.8 88
DIVIDE PEAK 8800 .0 3.5 0 24.2 30.7 79
OLD BATTLE 10000 24.9 24.8 100 42.3 39.5 107
SANDSTONE RS 8150 .0 .1 0* 23.0 25.9 89
WHISKEY PARK 8950 19.3 12.8 151 35.3 38.2 92
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Basin wide percent of average 107 92
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .0 .6 0* 16.8 20.5 82
BLIND BULL SUM 8650 15.3 16.8 91 23.6 29.4 80
EAST RIM DIVIDE 7930 .6 7.3 8 15.3 19.1 80
ELKHART PARK G.S. 9400 .2 4.7 4 18.6 20.1 93
GROS VENTRE SUMMIT 8775 .5 .6 83* 17.2 20.0 86
KENDALL R.S. 7740 .0 .0 100* 18.7 19.6 95
LOOMIS PARK 8240 -M .7 * 21.6 23.7 91
NEW FORK LAKE 8340 -M .4 * 15.5 18.2 85
SNIDER BASIN 8250 .0 .5 0* 16.2 19.1 85
SPRING CREEK DIVIDE 9000 15.4 19.4 79 27.3 33.7 81
TRIPLE PEAK 8500 1.1 15.1 7 27.1 38.7 70
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Basin wide percent of average 51* 83
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 15.0 16.8 89
HEWINTA 9500 .0 .0 100* 19.0 18.9 101
HICKERSON PARK 9150 .0 .0 100* 18.2 15.1 121
HOLE-IN-ROCK 9150 .0 .1 0* 16.1 15.1 107
INDIAN CREEK 9425 16.0 17.8 90 25.1 32.2 78
KELLEY R.S. 8180 .0 .6 0* 21.5 23.7 91
STEEL CREEK PARK 10100 15.6 12.3 127 24.2 19.7 123
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Basin wide percent of average 103* 98
UPPER BEAR RIVER
BUG LAKE 7950 .1 2.8 4 26.3 24.8 106
HAYDEN FORK 9400 .0 .0 100* 26.4 26.1 101
KELLEY R.S. 8180 .0 .6 0* 21.5 23.7 91
LILY LAKE 9050 .0 1.3 0* 23.1 21.0 110
MONTE CRISTO 8960 14.5 10.5 138 34.2 33.6 102
SALT RIVER SUMMIT 7600 1.0 .0 * 25.3 21.3 119
TRIAL LAKE 9960 11.5 12.5 92 30.1 31.6 95
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Basin wide percent of average 94* 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.