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 SATURDAY: MAY 9 , 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 5.3 7.3 73 22.9 25.9 88
COTTONWOOD CREEK 7600 11.0 16.6 66 26.3 28.9 91
GRANITE CREEK 6770 7.9 9.7 81 22.4 27.6 81
GRASSY LAKE 7265 21.7 30.1 72 38.5 43.0 90
GROS VENTRE SUMMIT 8775 9.0 11.7 77 15.1 18.6 81
LEWIS LAKE DIVIDE 7860 23.4 31.7 74 35.3 43.8 81
PHILLIPS BENCH 8200 22.9 27.1 85 29.2 34.5 85
SALT RIVER SUMMIT 7600 5.1 4.6 111 21.3 19.8 108
SNAKE RIVER STATION 6920 -M 13.6 * -M 30.2 *
SPRING CREEK DIVIDE 9000 19.8 27.5 72 24.8 31.6 78
THUMB DIVIDE 7980 -M 12.9 * -M 24.2 *
TOGWOTEE PASS 9580 23.1 27.0 86 26.8 32.8 82
TWO OCEAN PLATEAU 9360 27.8 26.9 103 30.4 35.7 85
WILLOW CREEK 8450 17.8 29.6 60 35.4 37.2 95
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Basin wide percent of average 78 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 16.9 25.4 67 18.3 22.2 82
BLACK BEAR 7950 34.9 38.2 91 39.9 47.6 84
CANYON 7940 4.9 8.4 58 16.3 17.0 96
FISHER CREEK 9100 27.7 38.0 73 30.9 43.4 71
MADISON PLATEAU 7750 16.0 21.0 76 25.7 30.8 83
NORTHEAST ENTRANCE 7350 .0 4.0 0 12.7 14.6 87
PARKER PEAK 9400 15.2 23.1 66 18.0 19.1 94
SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97
THUMB DIVIDE 7980 -M 12.9 * -M 24.2 *
TWO OCEAN PLATEAU 9360 27.8 26.9 103 30.4 35.7 85
WHISKEY CREEK 6800 10.9 11.9 92 21.1 25.6 82
WHITE MILL 8700 20.4 25.5 80 23.1 33.6 69
WOLVERINE 7650 .0 5.2 0 -M 15.9 *
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Basin wide percent of average 75 83
WIND RIVER
BURROUGHS CREEK 8750 12.9 9.5 136 19.6 20.2 97
COLD SPRINGS 9630 6.3 4.5 140 15.2 13.9 109
DEER PARK 9700 -M -M * 25.1 -M *
HOBBS PARK 10100 19.1 17.4 110 19.2 18.2 105
LITTLE WARM 9620 6.6 7.5 88 16.0 17.1 94
SOUTH PASS 9040 13.8 17.2 80 21.7 21.5 101
ST. LAWRENCE ALT 8620 5.8 3.7 157 13.7 13.1 105
TOGWOTEE PASS 9580 23.1 27.0 86 26.8 32.8 82
TOWNSEND CREEK 8700 9.1 7.6 120 17.7 16.3 109
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Basin wide percent of average 102 98
BIGHORN BASIN
BALD MTN. 9375 19.5 24.3 80 20.4 22.0 93
BEAR TRAP MEADOW 7900 .0 2.6 0 11.7 11.5 102
BLACKWATER 9780 20.1 25.2 80 20.5 21.5 95
BONE SPRINGS DIV 9350 16.8 17.4 97 19.8 19.2 103
EVENING STAR 9200 19.1 30.5 63 27.2 26.9 101
GRAVE SPRINGS 8550 8.9 -M * 14.3 13.4 107
KIRWIN 9550 10.8 10.8 100 16.4 14.0 117
MARQUETTE 8760 10.9 8.0 136 16.5 14.5 114
MIDDLE POWDER 7760 9.1 14.3 64 13.5 15.7 86
OWL CREEK 8975 1.8 2.0 90 9.8 8.8 111
POWDER RIVER PASS 9480 9.6 8.0 120 16.5 15.6 106
SHELL CREEK 9580 13.2 17.0 78 13.8 16.9 82
SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97
SYLVAN ROAD 8120 .1 5.7 2 15.2 19.4 78
TIMBER CREEK 7950 3.9 4.0 98 12.7 11.0 115
YOUNTS PEAK 8350 13.7 16.9 81 17.0 20.1 85
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Basin wide percent of average 77 98
SHOSHONE RIVER
BLACKWATER 9780 20.1 25.2 80 20.5 21.5 95
EVENING STAR 9200 19.1 30.5 63 27.2 26.9 101
KIRWIN 9550 10.8 10.8 100 16.4 14.0 117
MARQUETTE 8760 10.9 8.0 136 16.5 14.5 114
SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97
SYLVAN ROAD 8120 .1 5.7 2 15.2 19.4 78
YOUNTS PEAK 8350 13.7 16.9 81 17.0 20.1 85
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Basin wide percent of average 74 97
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 2.6 0 11.7 11.5 102
BONE SPRINGS DIV 9350 16.8 17.4 97 19.8 19.2 103
BURGESS JUNCTION 7880 9.8 12.1 81 15.2 15.3 99
CLOUD PEAK RESERVOIR 9860 15.6 16.8 93 20.0 18.2 110
DOME LAKE 8880 -M 12.3 * 16.6 17.4 95
GRAVE SPRINGS 8550 8.9 -M * 14.3 13.4 107
HANSEN SAWMILL 8760 3.3 5.2 63 13.9 11.0 126
MIDDLE POWDER 7760 9.1 14.3 64 13.5 15.7 86
POWDER RIVER PASS 9480 9.6 8.0 120 16.5 15.6 106
SUCKER CREEK 8880 9.2 11.9 77 17.0 17.5 97
TIE CREEK 6870 .2 -M * 16.3 14.6 112
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Basin wide percent of average 83 103
BELLE FOURCHE
BLIND PARK 6890 -M 6.7 * 14.4 14.9 97
NORTH RAPID CREEK 6130 .1 -M * 12.0 -M *
WARREN PEAK 6520 -M 6.7 * -M 11.1 *
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Basin wide percent of average * 97*
UPPER N. PLATTE RIVER
COLUMBINE 9400 7.9 17.5 45 26.1 28.8 91
DIVIDE PEAK 8800 13.8 15.4 90 23.4 28.2 83
ELK RIVER 8700 7.8 11.8 66 22.8 22.7 100
JOE WRIGHT 10120 22.1 24.1 92 29.0 31.5 92
NORTH FRENCH CREEK 10100 32.0 27.9 115 34.3 29.1 118
OLD BATTLE 10000 35.4 37.5 94 39.9 36.7 109
SOUTH BRUSH CREEK 8400 1.5 7.9 19 15.3 21.3 72
TOWER 10500 53.3 50.9 105 46.7 44.8 104
WEBBER SPRINGS 9200 16.6 22.9 72 29.3 31.4 93
WILLOW CREEK PASS 9540 9.4 11.9 79 10.1 16.1 63
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Basin wide percent of average 88 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.4 26.6 84 26.5 24.7 107
CASPER MTN. 7900 4.8 14.0 34 15.1 19.9 76
DEADMAN HILL 10220 17.2 18.8 91 18.7 22.0 85
DEER PARK 9700 -M -M * 25.1 -M *
LAPRELE CREEK 8320 .0 4.6 0 12.7 15.6 81
RENO HILL 8400 4.0 10.7 37 13.6 22.9 59
ROACH 9700 14.1 16.9 83 21.1 26.9 78
SAND LAKE 10080 30.8 36.2 85 28.7 25.7 112
SOUTH PASS 9040 13.8 17.2 80 21.7 21.5 101
WINDY PEAK 7840 .0 5.4 0 10.8 13.1 82
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Basin wide percent of average 71 88
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 2.1 0 17.7 19.1 93
DIVIDE PEAK 8800 13.8 15.4 90 23.4 28.2 83
OLD BATTLE 10000 35.4 37.5 94 39.9 36.7 109
SANDSTONE RS 8150 2.8 5.5 51 22.2 23.8 93
WHISKEY PARK 8950 28.5 27.1 105 33.3 35.1 95
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Basin wide percent of average 92 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.8 11.6 76 14.6 19.0 77
BLIND BULL SUM 8650 22.0 22.5 98 21.1 27.6 76
EAST RIM DIVIDE 7930 9.0 13.6 66 13.5 17.8 76
ELKHART PARK G.S. 9400 8.1 11.6 70 15.7 18.7 84
GROS VENTRE SUMMIT 8775 9.0 11.7 77 15.1 18.6 81
KENDALL R.S. 7740 3.9 4.5 87 17.1 18.1 94
LOOMIS PARK 8240 -M 12.9 * 19.7 22.0 90
NEW FORK LAKE 8340 2.7 7.4 36 13.4 16.9 79
SNIDER BASIN 8250 8.4 10.4 81 14.9 17.7 84
SPRING CREEK DIVIDE 9000 19.8 27.5 72 24.8 31.6 78
TRIPLE PEAK 8500 13.0 22.8 57 24.8 36.0 69
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Basin wide percent of average 73 80
LOWER GREEN RIVER
HAMS FORK 7840 .3 2.4 12 13.3 15.6 85
HEWINTA 9500 5.9 2.3 257 18.2 17.0 107
HICKERSON PARK 9150 8.0 1.6 500 16.8 13.0 129
HOLE-IN-ROCK 9150 4.3 1.3 331 14.3 13.0 110
INDIAN CREEK 9425 21.1 26.6 79 22.4 30.0 75
KELLEY R.S. 8180 7.6 12.1 63 18.6 21.9 85
STEEL CREEK PARK 10100 21.6 17.6 123 22.2 17.1 130
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Basin wide percent of average 108 99
UPPER BEAR RIVER
BUG LAKE 7950 14.0 12.6 111 24.0 23.2 103
HAYDEN FORK 9400 7.4 3.2 231 24.9 23.8 105
KELLEY R.S. 8180 7.6 12.1 63 18.6 21.9 85
LILY LAKE 9050 8.8 7.0 126 21.7 18.8 115
MONTE CRISTO 8960 23.7 23.7 100 30.2 31.2 97
SALT RIVER SUMMIT 7600 5.1 4.6 111 21.3 19.8 108
TRIAL LAKE 9960 20.6 22.3 92 27.4 29.2 94
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Basin wide percent of average 102 100
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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.