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 3 , 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 9.4 9.9 95 22.9 25.4 90
COTTONWOOD CREEK 7600 14.5 19.1 76 25.6 28.4 90
GRANITE CREEK 6770 11.3 12.1 93 22.3 27.0 83
GRASSY LAKE 7265 27.2 32.9 83 38.4 42.2 91
GROS VENTRE SUMMIT 8775 11.3 13.4 84 14.9 18.2 82
LEWIS LAKE DIVIDE 7860 28.0 33.7 83 35.3 42.9 82
PHILLIPS BENCH 8200 26.1 28.9 90 28.9 33.8 86
SALT RIVER SUMMIT 7600 9.7 9.3 104 20.5 19.3 106
SNAKE RIVER STATION 6920 11.0 15.7 70 24.8 29.6 84
SPRING CREEK DIVIDE 9000 21.1 29.1 73 24.2 31.0 78
THUMB DIVIDE 7980 12.9 14.5 89 20.0 23.8 84
TOGWOTEE PASS 9580 24.7 28.0 88 26.7 32.1 83
TWO OCEAN PLATEAU 9360 30.3 27.4 111 30.3 34.9 87
WILLOW CREEK 8450 21.6 31.3 69 35.0 36.4 96
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Basin wide percent of average 85 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 19.4 25.8 75 18.3 21.4 86
BLACK BEAR 7950 38.6 39.4 98 39.9 46.8 85
CANYON 7940 9.1 10.3 88 16.4 16.5 99
FISHER CREEK 9100 29.0 38.5 75 30.9 42.5 73
MADISON PLATEAU 7750 19.5 23.1 84 25.7 30.1 85
NORTHEAST ENTRANCE 7350 .5 5.4 9 12.7 14.1 90
PARKER PEAK 9400 18.1 23.6 77 18.0 18.4 98
SYLVAN LAKE 8420 15.8 23.3 68 22.6 22.6 100
THUMB DIVIDE 7980 12.9 14.5 89 20.0 23.8 84
TWO OCEAN PLATEAU 9360 30.3 27.4 111 30.3 34.9 87
WHISKEY CREEK 6800 14.0 14.4 97 21.2 25.1 84
WHITE MILL 8700 22.8 26.1 87 23.1 32.9 70
WOLVERINE 7650 .5 7.4 7 -M 15.4 *
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Basin wide percent of average 83 85
WIND RIVER
BURROUGHS CREEK 8750 15.5 12.0 129 19.3 19.6 98
COLD SPRINGS 9630 8.6 6.2 139 14.8 13.3 111
DEER PARK 9700 -M -M * 24.6 -M *
HOBBS PARK 10100 18.7 17.8 105 18.2 17.5 104
LITTLE WARM 9620 9.7 9.7 100 15.9 16.5 96
SOUTH PASS 9040 15.5 17.9 87 21.1 20.8 101
ST. LAWRENCE ALT 8620 8.7 5.0 174 13.0 12.6 103
TOGWOTEE PASS 9580 24.7 28.0 88 26.7 32.1 83
TOWNSEND CREEK 8700 10.7 9.0 119 17.1 15.7 109
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Basin wide percent of average 106 99
BIGHORN BASIN
BALD MTN. 9375 22.0 24.1 91 20.4 21.1 97
BEAR TRAP MEADOW 7900 1.0 3.8 26 11.6 10.8 107
BLACKWATER 9780 21.6 25.6 84 20.5 20.8 99
BONE SPRINGS DIV 9350 20.1 18.1 111 19.9 18.4 108
EVENING STAR 9200 21.4 30.7 70 27.1 26.2 103
GRAVE SPRINGS 8550 11.2 -M * 14.0 12.6 111
KIRWIN 9550 12.2 11.5 106 15.9 13.5 118
MARQUETTE 8760 13.6 8.5 160 16.5 13.7 120
MIDDLE POWDER 7760 11.5 14.7 78 13.4 15.0 89
OWL CREEK 8975 5.4 3.1 174 9.8 8.3 118
POWDER RIVER PASS 9480 10.9 9.9 110 16.1 14.9 108
SHELL CREEK 9580 14.9 17.0 88 13.8 16.2 85
SYLVAN LAKE 8420 15.8 23.3 68 22.6 22.6 100
SYLVAN ROAD 8120 4.0 7.3 55 15.2 18.8 81
TIMBER CREEK 7950 7.1 5.5 129 12.7 10.2 125
YOUNTS PEAK 8350 15.2 17.9 85 16.8 19.5 86
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Basin wide percent of average 89 101
SHOSHONE RIVER
BLACKWATER 9780 21.6 25.6 84 20.5 20.8 99
EVENING STAR 9200 21.4 30.7 70 27.1 26.2 103
KIRWIN 9550 12.2 11.5 106 15.9 13.5 118
MARQUETTE 8760 13.6 8.5 160 16.5 13.7 120
SYLVAN LAKE 8420 15.8 23.3 68 22.6 22.6 100
SYLVAN ROAD 8120 4.0 7.3 55 15.2 18.8 81
YOUNTS PEAK 8350 15.2 17.9 85 16.8 19.5 86
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Basin wide percent of average 83 100
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.0 3.8 26 11.6 10.8 107
BONE SPRINGS DIV 9350 20.1 18.1 111 19.9 18.4 108
BURGESS JUNCTION 7880 11.7 13.2 89 15.2 14.6 104
CLOUD PEAK RESERVOIR 9860 16.4 17.5 94 19.8 17.4 114
DOME LAKE 8880 -M 14.3 * 16.4 16.6 99
GRAVE SPRINGS 8550 11.2 -M * 14.0 12.6 111
HANSEN SAWMILL 8760 6.4 6.5 98 13.6 10.5 130
MIDDLE POWDER 7760 11.5 14.7 78 13.4 15.0 89
POWDER RIVER PASS 9480 10.9 9.9 110 16.1 14.9 108
SUCKER CREEK 8880 11.6 13.3 87 16.9 16.8 101
TIE CREEK 6870 4.3 -M * 16.3 14.0 116
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Basin wide percent of average 92 107
BELLE FOURCHE
BLIND PARK 6890 .0 8.9 0 13.9 14.1 99
NORTH RAPID CREEK 6130 2.0 -M * 11.8 -M *
WARREN PEAK 6520 6.4 8.9 72 12.4 10.5 118
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Basin wide percent of average 36 107
UPPER N. PLATTE RIVER
COLUMBINE 9400 11.7 21.0 56 25.6 28.3 90
DIVIDE PEAK 8800 14.9 18.3 81 22.4 27.5 81
ELK RIVER 8700 9.9 15.1 66 22.5 22.3 101
JOE WRIGHT 10120 23.0 24.6 93 27.5 30.6 90
NORTH FRENCH CREEK 10100 31.5 29.0 109 32.6 28.3 115
OLD BATTLE 10000 34.5 38.0 91 38.9 36.0 108
SOUTH BRUSH CREEK 8400 2.1 9.9 21 14.4 20.8 69
TOWER 10500 53.5 51.1 105 45.2 43.6 104
WEBBER SPRINGS 9200 17.9 25.2 71 28.6 30.8 93
WILLOW CREEK PASS 9540 9.1 13.1 69 9.7 15.6 62
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Basin wide percent of average 85 94
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.0 28.3 81 24.7 24.0 103
CASPER MTN. 7900 9.0 16.9 53 15.1 19.1 79
DEADMAN HILL 10220 16.4 19.0 86 17.3 21.3 81
DEER PARK 9700 -M -M * 24.6 -M *
LAPRELE CREEK 8320 1.8 5.9 31 12.7 14.9 85
RENO HILL 8400 8.2 12.7 65 13.6 22.5 60
ROACH 9700 14.5 17.8 81 19.6 26.1 75
SAND LAKE 10080 30.0 36.9 81 27.3 25.0 109
SOUTH PASS 9040 15.5 17.9 87 21.1 20.8 101
WINDY PEAK 7840 2.2 7.3 30 10.7 12.4 86
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Basin wide percent of average 74 87
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .8 4.1 20 17.7 18.7 95
DIVIDE PEAK 8800 14.9 18.3 81 22.4 27.5 81
OLD BATTLE 10000 34.5 38.0 91 38.9 36.0 108
SANDSTONE RS 8150 5.2 8.7 60 21.5 23.2 93
WHISKEY PARK 8950 27.5 29.0 95 31.2 34.3 91
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Basin wide percent of average 85 94
UPPER GREEN RIVER
BIG SANDY OPENING 9100 10.9 13.3 82 14.0 18.6 75
BLIND BULL SUM 8650 23.1 22.7 102 20.9 27.1 77
EAST RIM DIVIDE 7930 11.4 14.5 79 13.3 17.4 76
ELKHART PARK G.S. 9400 10.7 13.4 80 15.4 18.3 84
GROS VENTRE SUMMIT 8775 11.3 13.4 84 14.9 18.2 82
KENDALL R.S. 7740 7.5 9.1 82 16.7 17.7 94
LOOMIS PARK 8240 -M 14.6 * 19.1 21.6 88
NEW FORK LAKE 8340 6.2 8.7 71 12.9 16.5 78
SNIDER BASIN 8250 10.8 12.4 87 14.1 17.3 82
SPRING CREEK DIVIDE 9000 21.1 29.1 73 24.2 31.0 78
TRIPLE PEAK 8500 16.3 24.5 67 24.3 35.2 69
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Basin wide percent of average 80 79
LOWER GREEN RIVER
HAMS FORK 7840 2.2 4.9 45 13.1 15.3 86
HEWINTA 9500 7.7 4.5 171 17.4 16.5 105
HICKERSON PARK 9150 10.0 2.6 385 15.5 12.5 124
HOLE-IN-ROCK 9150 7.1 2.0 355 13.4 12.5 107
INDIAN CREEK 9425 22.5 28.3 80 21.9 29.4 74
KELLEY R.S. 8180 11.2 14.3 78 18.4 21.5 86
STEEL CREEK PARK 10100 20.4 18.6 110 21.8 16.3 134
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Basin wide percent of average 108 98
UPPER BEAR RIVER
BUG LAKE 7950 16.2 15.2 107 23.6 22.7 104
HAYDEN FORK 9400 9.3 5.8 160 23.7 23.2 102
KELLEY R.S. 8180 11.2 14.3 78 18.4 21.5 86
LILY LAKE 9050 10.7 8.3 129 20.7 18.2 114
MONTE CRISTO 8960 26.1 25.6 102 29.6 30.5 97
SALT RIVER SUMMIT 7600 9.7 9.3 104 20.5 19.3 106
TRIAL LAKE 9960 23.0 23.6 97 26.5 28.5 93
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Basin wide percent of average 104 99
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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.