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 TUESDAY: MAY 12 , 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 3.7 6.1 61 22.9 26.2 87
COTTONWOOD CREEK 7600 10.4 15.3 68 27.1 29.2 93
GRANITE CREEK 6770 6.8 8.5 80 22.9 27.9 82
GRASSY LAKE 7265 20.3 28.6 71 38.8 43.5 89
GROS VENTRE SUMMIT 8775 8.8 10.9 81 15.6 18.8 83
LEWIS LAKE DIVIDE 7860 21.7 30.6 71 35.5 44.2 80
PHILLIPS BENCH 8200 23.1 26.2 88 30.0 34.8 86
SALT RIVER SUMMIT 7600 4.2 2.3 183 21.9 20.0 110
SNAKE RIVER STATION 6920 2.6 12.6 21 25.2 30.5 83
SPRING CREEK DIVIDE 9000 19.8 26.8 74 25.4 31.9 80
THUMB DIVIDE 7980 6.4 12.0 53 20.5 24.5 84
TOGWOTEE PASS 9580 23.1 26.5 87 27.2 33.1 82
TWO OCEAN PLATEAU 9360 27.2 26.6 102 30.6 36.0 85
WILLOW CREEK 8450 17.3 28.7 60 36.3 37.5 97
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Basin wide percent of average 75 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 16.5 25.1 66 18.3 22.5 81
BLACK BEAR 7950 33.9 37.6 90 40.3 48.0 84
CANYON 7940 3.2 7.4 43 16.5 17.2 96
FISHER CREEK 9100 26.6 37.7 71 30.9 43.9 70
MADISON PLATEAU 7750 14.7 19.9 74 26.2 31.1 84
NORTHEAST ENTRANCE 7350 .0 3.3 0 12.7 14.8 86
PARKER PEAK 9400 14.4 22.9 63 18.1 19.4 93
SYLVAN LAKE 8420 11.7 21.3 55 23.0 23.7 97
THUMB DIVIDE 7980 6.4 12.0 53 20.5 24.5 84
TWO OCEAN PLATEAU 9360 27.2 26.6 102 30.6 36.0 85
WHISKEY CREEK 6800 9.2 10.7 86 21.3 25.9 82
WHITE MILL 8700 19.7 25.2 78 23.3 34.0 69
WOLVERINE 7650 .0 4.1 0 10.5 16.2 65
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Basin wide percent of average 72 82
WIND RIVER
BURROUGHS CREEK 8750 12.7 8.2 155 20.0 20.5 98
COLD SPRINGS 9630 6.7 3.7 181 16.1 14.2 113
DEER PARK 9700 -M -M * 25.8 -M *
HOBBS PARK 10100 19.6 17.1 115 20.0 18.6 108
LITTLE WARM 9620 6.5 6.5 100 16.6 17.4 95
SOUTH PASS 9040 14.1 16.8 84 22.4 21.8 103
ST. LAWRENCE ALT 8620 5.9 3.0 197 14.4 13.3 108
TOGWOTEE PASS 9580 23.1 26.5 87 27.2 33.1 82
TOWNSEND CREEK 8700 8.8 6.8 129 18.2 16.6 110
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Basin wide percent of average 110 100
BIGHORN BASIN
BALD MTN. 9375 19.7 24.3 81 20.4 22.4 91
BEAR TRAP MEADOW 7900 .4 2.0 20 12.9 11.8 109
BLACKWATER 9780 20.0 25.0 80 20.8 21.8 95
BONE SPRINGS DIV 9350 16.1 17.0 95 19.9 19.6 102
EVENING STAR 9200 18.9 30.4 62 27.4 27.3 100
GRAVE SPRINGS 8550 9.4 -M * 15.4 13.7 112
KIRWIN 9550 11.0 10.4 106 17.1 14.3 120
MARQUETTE 8760 11.1 7.8 142 17.0 14.8 115
MIDDLE POWDER 7760 8.8 14.2 62 14.4 16.0 90
OWL CREEK 8975 1.7 1.5 113 10.3 9.0 114
POWDER RIVER PASS 9480 9.9 7.1 139 17.0 15.9 107
SHELL CREEK 9580 13.4 17.0 79 14.1 17.3 82
SYLVAN LAKE 8420 11.7 21.3 55 23.0 23.7 97
SYLVAN ROAD 8120 .1 4.8 2 15.5 19.7 79
TIMBER CREEK 7950 3.6 3.2 112 13.0 11.3 115
YOUNTS PEAK 8350 13.3 16.3 82 17.3 20.4 85
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Basin wide percent of average 79 99
SHOSHONE RIVER
BLACKWATER 9780 20.0 25.0 80 20.8 21.8 95
EVENING STAR 9200 18.9 30.4 62 27.4 27.3 100
KIRWIN 9550 11.0 10.4 106 17.1 14.3 120
MARQUETTE 8760 11.1 7.8 142 17.0 14.8 115
SYLVAN LAKE 8420 11.7 21.3 55 23.0 23.7 97
SYLVAN ROAD 8120 .1 4.8 2 15.5 19.7 79
YOUNTS PEAK 8350 13.3 16.3 82 17.3 20.4 85
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Basin wide percent of average 74 97
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .4 2.0 20 12.9 11.8 109
BONE SPRINGS DIV 9350 16.1 17.0 95 19.9 19.6 102
BURGESS JUNCTION 7880 9.4 11.6 81 15.2 15.6 97
CLOUD PEAK RESERVOIR 9860 15.8 16.4 96 20.5 18.6 110
DOME LAKE 8880 -M 11.3 * 16.9 17.7 95
GRAVE SPRINGS 8550 9.4 -M * 15.4 13.7 112
HANSEN SAWMILL 8760 3.5 4.6 76 14.3 11.3 127
MIDDLE POWDER 7760 8.8 14.2 62 14.4 16.0 90
POWDER RIVER PASS 9480 9.9 7.1 139 17.0 15.9 107
SUCKER CREEK 8880 8.8 11.2 79 17.0 17.9 95
TIE CREEK 6870 -M -M * -M 14.9 *
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Basin wide percent of average 86 103
BELLE FOURCHE
BLIND PARK 6890 -M 5.7 * 15.6 15.4 101
NORTH RAPID CREEK 6130 .0 -M * 12.8 -M *
WARREN PEAK 6520 .8 5.7 14 13.3 11.4 117
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Basin wide percent of average 14* 108
UPPER N. PLATTE RIVER
COLUMBINE 9400 5.6 15.8 35 26.4 29.1 91
DIVIDE PEAK 8800 12.1 14.0 86 23.9 28.5 84
ELK RIVER 8700 6.1 10.2 60 23.3 23.0 101
JOE WRIGHT 10120 22.5 23.9 94 29.6 31.9 93
NORTH FRENCH CREEK 10100 32.7 27.3 120 35.3 29.5 120
OLD BATTLE 10000 35.8 37.2 96 40.8 37.1 110
SOUTH BRUSH CREEK 8400 1.1 6.9 16 16.0 21.6 74
TOWER 10500 53.8 50.9 106 47.4 45.4 104
WEBBER SPRINGS 9200 15.5 21.7 71 29.9 31.7 94
WILLOW CREEK PASS 9540 8.7 11.3 77 10.5 16.4 64
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Basin wide percent of average 88 96
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.0 25.8 85 27.1 25.0 108
CASPER MTN. 7900 3.4 12.6 27 15.1 20.3 74
DEADMAN HILL 10220 17.1 18.7 91 19.2 22.3 86
DEER PARK 9700 -M -M * 25.8 -M *
LAPRELE CREEK 8320 .0 4.0 0 13.1 15.9 82
RENO HILL 8400 2.8 9.6 29 14.4 23.1 62
ROACH 9700 14.0 16.5 85 21.3 27.4 78
SAND LAKE 10080 31.1 35.8 87 29.5 26.1 113
SOUTH PASS 9040 14.1 16.8 84 22.4 21.8 103
WINDY PEAK 7840 .0 4.4 0 11.2 13.4 84
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Basin wide percent of average 72 89
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 1.0 0* 17.9 19.4 92
DIVIDE PEAK 8800 12.1 14.0 86 23.9 28.5 84
OLD BATTLE 10000 35.8 37.2 96 40.8 37.1 110
SANDSTONE RS 8150 .8 3.9 21 22.7 24.1 94
WHISKEY PARK 8950 28.9 26.2 110 34.1 35.5 96
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Basin wide percent of average 94 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 9.1 10.7 85 15.7 19.2 82
BLIND BULL SUM 8650 22.1 22.5 98 22.0 27.8 79
EAST RIM DIVIDE 7930 8.5 13.2 64 14.0 18.0 78
ELKHART PARK G.S. 9400 9.2 10.7 86 16.4 18.9 87
GROS VENTRE SUMMIT 8775 8.8 10.9 81 15.6 18.8 83
KENDALL R.S. 7740 2.3 2.3 100 17.3 18.3 95
LOOMIS PARK 8240 -M 12.1 * 20.0 22.3 90
NEW FORK LAKE 8340 2.4 6.8 35 13.2 17.1 77
SNIDER BASIN 8250 7.5 9.5 79 15.2 17.9 85
SPRING CREEK DIVIDE 9000 19.8 26.8 74 25.4 31.9 80
TRIPLE PEAK 8500 12.8 22.0 58 25.3 36.3 70
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Basin wide percent of average 76 81
LOWER GREEN RIVER
HAMS FORK 7840 .3 1.2 25* 13.8 15.8 87
HEWINTA 9500 4.9 1.1 445* 18.3 17.3 106
HICKERSON PARK 9150 7.2 1.1 655 17.2 13.3 129
HOLE-IN-ROCK 9150 3.3 .9 367 14.6 13.3 110
INDIAN CREEK 9425 21.7 25.8 84 23.1 30.3 76
KELLEY R.S. 8180 7.5 11.1 68 19.4 22.2 87
STEEL CREEK PARK 10100 21.8 17.1 127 22.5 17.4 129
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Basin wide percent of average 114 99
UPPER BEAR RIVER
BUG LAKE 7950 14.0 11.4 123 24.7 23.4 106
HAYDEN FORK 9400 7.0 2.0 350 25.2 24.1 105
KELLEY R.S. 8180 7.5 11.1 68 19.4 22.2 87
LILY LAKE 9050 7.7 6.3 122 22.0 19.1 115
MONTE CRISTO 8960 24.3 22.8 107 31.3 31.5 99
SALT RIVER SUMMIT 7600 4.2 2.3 183 21.9 20.0 110
TRIAL LAKE 9960 20.5 21.6 95 28.1 29.5 95
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Basin wide percent of average 110 102
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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.