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 8 , 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 6.0 7.8 77 22.9 25.8 89
COTTONWOOD CREEK 7600 11.9 17.0 70 26.3 28.9 91
GRANITE CREEK 6770 8.5 10.1 84 22.4 27.5 81
GRASSY LAKE 7265 22.8 30.6 75 38.5 42.9 90
GROS VENTRE SUMMIT 8775 9.4 12.0 78 15.1 18.6 81
LEWIS LAKE DIVIDE 7860 24.3 32.0 76 35.3 43.6 81
PHILLIPS BENCH 8200 23.4 27.4 85 29.2 34.4 85
SALT RIVER SUMMIT 7600 5.9 5.4 109 21.1 19.7 107
SNAKE RIVER STATION 6920 6.3 14.0 45 24.8 30.1 82
SPRING CREEK DIVIDE 9000 20.2 27.8 73 24.8 31.5 79
THUMB DIVIDE 7980 9.1 13.2 69 20.3 24.2 84
TOGWOTEE PASS 9580 23.5 27.2 86 26.8 32.7 82
TWO OCEAN PLATEAU 9360 28.4 27.0 105 30.4 35.5 86
WILLOW CREEK 8450 18.5 29.9 62 35.4 37.1 95
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Basin wide percent of average 78 86
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.3 25.5 68 18.3 22.1 83
BLACK BEAR 7950 35.8 38.4 93 40.0 47.4 84
CANYON 7940 5.6 8.7 64 16.3 16.9 96
FISHER CREEK 9100 27.8 38.1 73 30.9 43.3 71
MADISON PLATEAU 7750 16.6 21.4 78 25.8 30.7 84
NORTHEAST ENTRANCE 7350 .0 4.3 0 12.7 14.5 88
PARKER PEAK 9400 15.6 23.2 67 18.0 18.9 95
SYLVAN LAKE 8420 13.1 22.2 59 22.7 23.2 98
THUMB DIVIDE 7980 9.1 13.2 69 20.3 24.2 84
TWO OCEAN PLATEAU 9360 28.4 27.0 105 30.4 35.5 86
WHISKEY CREEK 6800 11.4 12.4 92 21.1 25.5 83
WHITE MILL 8700 20.8 25.6 81 23.1 33.5 69
WOLVERINE 7650 .0 5.6 0 -M 15.9 *
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Basin wide percent of average 76 83
WIND RIVER
BURROUGHS CREEK 8750 13.5 9.9 136 19.5 20.1 97
COLD SPRINGS 9630 6.9 4.8 144 15.1 13.8 109
DEER PARK 9700 -M -M * 25.1 -M *
HOBBS PARK 10100 19.3 17.5 110 19.2 18.1 106
LITTLE WARM 9620 7.2 7.9 91 16.0 17.0 94
SOUTH PASS 9040 14.3 17.3 83 21.6 21.4 101
ST. LAWRENCE ALT 8620 6.5 3.9 167 13.6 13.0 105
TOGWOTEE PASS 9580 23.5 27.2 86 26.8 32.7 82
TOWNSEND CREEK 8700 9.8 7.8 126 17.7 16.2 109
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Basin wide percent of average 105 98
BIGHORN BASIN
BALD MTN. 9375 19.8 24.3 81 20.4 21.8 94
BEAR TRAP MEADOW 7900 .0 2.8 0 11.5 11.3 102
BLACKWATER 9780 20.2 25.3 80 20.5 21.4 96
BONE SPRINGS DIV 9350 17.1 17.5 98 19.7 19.0 104
EVENING STAR 9200 19.5 30.6 64 27.1 26.8 101
GRAVE SPRINGS 8550 9.3 -M * 14.3 13.3 108
KIRWIN 9550 11.3 10.9 104 16.4 14.0 117
MARQUETTE 8760 11.4 8.1 141 16.5 14.4 115
MIDDLE POWDER 7760 9.3 14.4 65 13.5 15.6 87
OWL CREEK 8975 2.7 2.2 123 9.9 8.7 114
POWDER RIVER PASS 9480 9.6 8.4 114 16.2 15.5 105
SHELL CREEK 9580 13.8 17.0 81 13.8 16.8 82
SYLVAN LAKE 8420 13.1 22.2 59 22.7 23.2 98
SYLVAN ROAD 8120 .2 6.0 3 15.2 19.3 79
TIMBER CREEK 7950 4.4 4.2 105 12.7 10.9 117
YOUNTS PEAK 8350 13.9 17.1 81 17.0 20.0 85
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Basin wide percent of average 79 98
SHOSHONE RIVER
BLACKWATER 9780 20.2 25.3 80 20.5 21.4 96
EVENING STAR 9200 19.5 30.6 64 27.1 26.8 101
KIRWIN 9550 11.3 10.9 104 16.4 14.0 117
MARQUETTE 8760 11.4 8.1 141 16.5 14.4 115
SYLVAN LAKE 8420 13.1 22.2 59 22.7 23.2 98
SYLVAN ROAD 8120 .2 6.0 3 15.2 19.3 79
YOUNTS PEAK 8350 13.9 17.1 81 17.0 20.0 85
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Basin wide percent of average 75 97
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 2.8 0 11.5 11.3 102
BONE SPRINGS DIV 9350 17.1 17.5 98 19.7 19.0 104
BURGESS JUNCTION 7880 10.2 12.3 83 15.1 15.1 100
CLOUD PEAK RESERVOIR 9860 15.4 16.9 91 19.9 18.0 111
DOME LAKE 8880 -M 12.7 * 16.5 17.3 95
GRAVE SPRINGS 8550 9.3 -M * 14.3 13.3 108
HANSEN SAWMILL 8760 3.4 5.5 62 13.7 10.9 126
MIDDLE POWDER 7760 9.3 14.4 65 13.5 15.6 87
POWDER RIVER PASS 9480 9.6 8.4 114 16.2 15.5 105
SUCKER CREEK 8880 9.7 12.2 80 16.8 17.4 97
TIE CREEK 6870 .2 -M * 16.3 14.5 112
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Basin wide percent of average 83 103
BELLE FOURCHE
BLIND PARK 6890 -M 7.1 * 14.3 14.8 97
NORTH RAPID CREEK 6130 .0 -M * 11.7 -M *
WARREN PEAK 6520 -M 7.1 * -M 11.0 *
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Basin wide percent of average * 97*
UPPER N. PLATTE RIVER
COLUMBINE 9400 8.6 18.1 48 26.3 28.7 92
DIVIDE PEAK 8800 13.8 15.9 87 23.2 28.1 83
ELK RIVER 8700 7.5 12.4 60 22.7 22.6 100
JOE WRIGHT 10120 21.7 24.2 90 28.7 31.3 92
NORTH FRENCH CREEK 10100 31.7 28.1 113 34.0 29.0 117
OLD BATTLE 10000 35.1 37.6 93 39.7 36.6 108
SOUTH BRUSH CREEK 8400 1.5 8.3 18 14.9 21.2 70
TOWER 10500 52.9 51.0 104 46.5 44.6 104
WEBBER SPRINGS 9200 16.6 23.3 71 29.1 31.3 93
WILLOW CREEK PASS 9540 9.3 12.1 77 10.1 16.1 63
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Basin wide percent of average 86 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.2 26.9 83 26.1 24.5 107
CASPER MTN. 7900 5.3 14.5 37 15.2 19.7 77
DEADMAN HILL 10220 16.9 18.9 89 18.6 21.9 85
DEER PARK 9700 -M -M * 25.1 -M *
LAPRELE CREEK 8320 .0 4.9 0 12.8 15.5 83
RENO HILL 8400 4.5 11.0 41 13.6 22.8 60
ROACH 9700 14.1 17.1 82 20.7 26.8 77
SAND LAKE 10080 30.5 36.3 84 28.6 25.6 112
SOUTH PASS 9040 14.3 17.3 83 21.6 21.4 101
WINDY PEAK 7840 .0 5.7 0 10.9 13.0 84
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Basin wide percent of average 71 88
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 2.4 8 17.6 19.0 93
DIVIDE PEAK 8800 13.8 15.9 87 23.2 28.1 83
OLD BATTLE 10000 35.1 37.6 93 39.7 36.6 108
SANDSTONE RS 8150 2.9 6.1 48 22.0 23.7 93
WHISKEY PARK 8950 28.1 27.5 102 32.9 35.0 94
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Basin wide percent of average 89 95
UPPER GREEN RIVER
BIG SANDY OPENING 9100 9.1 11.9 76 14.6 19.0 77
BLIND BULL SUM 8650 22.2 22.6 98 21.1 27.5 77
EAST RIM DIVIDE 7930 9.4 13.8 68 13.5 17.7 76
ELKHART PARK G.S. 9400 8.4 11.9 71 15.7 18.7 84
GROS VENTRE SUMMIT 8775 9.4 12.0 78 15.1 18.6 81
KENDALL R.S. 7740 4.7 5.3 89 17.1 18.1 94
LOOMIS PARK 8240 -M 13.2 * 19.7 21.9 90
NEW FORK LAKE 8340 3.6 7.7 47 13.2 16.8 79
SNIDER BASIN 8250 9.0 10.8 83 14.9 17.7 84
SPRING CREEK DIVIDE 9000 20.2 27.8 73 24.8 31.5 79
TRIPLE PEAK 8500 13.9 23.1 60 24.8 35.9 69
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Basin wide percent of average 75 80
LOWER GREEN RIVER
HAMS FORK 7840 .3 2.9 10 13.3 15.6 85
HEWINTA 9500 5.7 2.6 219 17.8 16.9 105
HICKERSON PARK 9150 8.1 1.8 450 16.4 13.0 126
HOLE-IN-ROCK 9150 4.9 1.4 350 14.2 13.0 109
INDIAN CREEK 9425 21.7 26.9 81 22.4 29.9 75
KELLEY R.S. 8180 8.5 12.5 68 18.6 21.9 85
STEEL CREEK PARK 10100 20.9 17.8 117 22.1 16.9 131
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Basin wide percent of average 106 98
UPPER BEAR RIVER
BUG LAKE 7950 14.4 13.1 110 23.8 23.1 103
HAYDEN FORK 9400 7.7 3.7 208 24.5 23.7 103
KELLEY R.S. 8180 8.5 12.5 68 18.6 21.9 85
LILY LAKE 9050 8.8 7.2 122 21.2 18.7 113
MONTE CRISTO 8960 24.0 24.1 100 29.9 31.1 96
SALT RIVER SUMMIT 7600 5.9 5.4 109 21.1 19.7 107
TRIAL LAKE 9960 21.3 22.5 95 27.3 29.1 94
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Basin wide percent of average 102 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.