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: MARCH 21 , 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 15.2 17.1 89 17.5 21.8 80
COTTONWOOD CREEK 7600 19.5 22.6 86 20.7 24.5 84
GRANITE CREEK 6770 15.7 17.7 89 18.1 23.0 79
GRASSY LAKE 7265 28.2 34.2 82 29.6 36.1 82
GROS VENTRE SUMMIT 8775 9.9 14.9 66 10.9 15.6 70
LEWIS LAKE DIVIDE 7860 25.6 33.8 76 27.4 36.7 75
PHILLIPS BENCH 8200 23.8 27.8 86 24.1 29.0 83
SALT RIVER SUMMIT 7600 14.0 13.7 102 15.9 16.5 96
SNAKE RIVER STATION 6920 15.1 18.1 83 -M 25.3 *
SPRING CREEK DIVIDE 9000 19.9 26.7 75 19.2 26.7 72
THUMB DIVIDE 7980 14.2 16.3 87 15.4 20.4 75
TOGWOTEE PASS 9580 22.7 23.7 96 21.2 27.5 77
TWO OCEAN PLATEAU 9360 23.9 25.4 94 24.0 30.1 80
WILLOW CREEK 8450 24.2 29.1 83 27.8 31.4 89
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Basin wide percent of average 85 80
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.2 22.5 76 15.1 17.1 88
BLACK BEAR 7950 34.4 36.4 95 31.2 38.6 81
CANYON 7940 12.0 12.3 98 13.2 13.6 97
FISHER CREEK 9100 27.5 34.2 80 24.8 34.8 71
MADISON PLATEAU 7750 18.8 23.4 80 20.1 25.0 80
NORTHEAST ENTRANCE 7350 6.8 8.9 76 11.0 11.3 97
PARKER PEAK 9400 16.6 20.6 81 14.6 14.8 99
SYLVAN LAKE 8420 15.7 21.1 74 18.3 18.2 101
THUMB DIVIDE 7980 14.2 16.3 87 15.4 20.4 75
TWO OCEAN PLATEAU 9360 23.9 25.4 94 24.0 30.1 80
WHISKEY CREEK 6800 13.2 16.5 80 16.2 20.7 78
WHITE MILL 8700 20.3 24.1 84 18.8 27.0 70
WOLVERINE 7650 9.3 11.2 83 9.4 12.2 77
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Basin wide percent of average 84 82
WIND RIVER
BURROUGHS CREEK 8750 12.9 14.5 89 14.2 15.7 90
COLD SPRINGS 9630 8.7 7.9 110 9.5 9.8 97
DEER PARK 9700 -M -M * 18.2 -M *
HOBBS PARK 10100 12.7 14.1 90 11.4 13.1 87
LITTLE WARM 9620 9.3 10.8 86 11.3 12.4 91
SOUTH PASS 9040 13.7 15.6 88 15.2 15.9 96
ST. LAWRENCE ALT 8620 8.8 7.2 122 8.6 9.4 91
TOGWOTEE PASS 9580 22.7 23.7 96 21.2 27.5 77
TOWNSEND CREEK 8700 10.6 9.3 114 11.9 11.5 103
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Basin wide percent of average 96 90
BIGHORN BASIN
BALD MTN. 9375 17.9 19.4 92 15.9 16.2 98
BEAR TRAP MEADOW 7900 6.0 6.7 90 6.2 7.5 83
BLACKWATER 9780 18.3 21.0 87 16.4 17.1 96
BONE SPRINGS DIV 9350 14.8 15.5 95 14.5 13.9 104
EVENING STAR 9200 20.5 25.6 80 22.2 21.4 104
GRAVE SPRINGS 8550 8.6 -M * 8.7 8.8 99
KIRWIN 9550 10.9 9.4 116 12.1 10.0 121
MARQUETTE 8760 12.0 7.6 158 12.2 8.6 142
MIDDLE POWDER 7760 9.8 11.4 86 9.2 10.9 84
OWL CREEK 8975 6.6 4.3 153 6.1 5.7 107
POWDER RIVER PASS 9480 9.8 10.3 95 10.7 10.8 99
SHELL CREEK 9580 12.9 14.2 91 9.9 12.2 81
SYLVAN LAKE 8420 15.7 21.1 74 18.3 18.2 101
SYLVAN ROAD 8120 9.3 12.4 75 12.9 15.3 84
TIMBER CREEK 7950 7.8 5.8 134 9.2 6.3 146
YOUNTS PEAK 8350 12.8 16.5 78 13.0 15.7 83
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Basin wide percent of average 92 99
SHOSHONE RIVER
BLACKWATER 9780 18.3 21.0 87 16.4 17.1 96
EVENING STAR 9200 20.5 25.6 80 22.2 21.4 104
KIRWIN 9550 10.9 9.4 116 12.1 10.0 121
MARQUETTE 8760 12.0 7.6 158 12.2 8.6 142
SYLVAN LAKE 8420 15.7 21.1 74 18.3 18.2 101
SYLVAN ROAD 8120 9.3 12.4 75 12.9 15.3 84
YOUNTS PEAK 8350 12.8 16.5 78 13.0 15.7 83
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Basin wide percent of average 88 101
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.0 6.7 90 6.2 7.5 83
BONE SPRINGS DIV 9350 14.8 15.5 95 14.5 13.9 104
BURGESS JUNCTION 7880 10.0 11.1 90 11.1 10.5 106
CLOUD PEAK RESERVOIR 9860 13.1 13.7 96 13.2 12.2 108
DOME LAKE 8880 -M 13.0 * 12.2 12.2 100
GRAVE SPRINGS 8550 8.6 -M * 8.7 8.8 99
HANSEN SAWMILL 8760 7.3 6.7 109 8.3 7.2 115
MIDDLE POWDER 7760 9.8 11.4 86 9.2 10.9 84
POWDER RIVER PASS 9480 9.8 10.3 95 10.7 10.8 99
SUCKER CREEK 8880 11.4 11.4 100 12.8 12.2 105
TIE CREEK 6870 7.3 -M * 11.3 10.0 113
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Basin wide percent of average 95 102
BELLE FOURCHE
BLIND PARK 6890 9.1 10.5 87 11.8 9.1 130
NORTH RAPID CREEK 6130 9.6 -M * 9.5 -M *
WARREN PEAK 6520 12.4 10.5 118 9.7 7.4 131
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Basin wide percent of average 102 130
UPPER N. PLATTE RIVER
COLUMBINE 9400 21.0 23.9 88 20.9 23.1 90
DIVIDE PEAK 8800 17.4 19.6 89 18.1 21.3 85
ELK RIVER 8700 16.0 19.0 84 16.4 17.9 92
JOE WRIGHT 10120 18.1 20.5 88 21.2 23.3 91
NORTH FRENCH CREEK 10100 27.2 23.9 114 25.5 21.9 116
OLD BATTLE 10000 27.9 29.9 93 31.4 28.2 111
SOUTH BRUSH CREEK 8400 9.6 12.0 80 11.3 15.1 75
TOWER 10500 -M 42.7 * 36.3 34.0 107
WEBBER SPRINGS 9200 18.2 26.1 70 22.9 23.6 97
WILLOW CREEK PASS 9540 6.2 11.0 56 6.5 11.6 56
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Basin wide percent of average 87 96
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 19.2 23.9 80 18.8 18.0 104
CASPER MTN. 7900 12.4 14.9 83 11.5 12.9 89
DEADMAN HILL 10220 13.0 15.6 83 12.5 15.4 81
DEER PARK 9700 -M -M * 18.2 -M *
LAPRELE CREEK 8320 9.0 9.8 92 10.1 10.8 94
RENO HILL 8400 11.5 13.0 88 10.6 17.6 60
ROACH 9700 13.2 16.2 81 15.0 19.8 76
SAND LAKE 10080 23.5 31.0 76 21.1 19.0 111
SOUTH PASS 9040 13.7 15.6 88 15.2 15.9 96
WINDY PEAK 7840 7.1 8.0 89 8.0 8.6 93
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Basin wide percent of average 83 89
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 13.1 11.0 119 14.7 14.3 103
DIVIDE PEAK 8800 17.4 19.6 89 18.1 21.3 85
OLD BATTLE 10000 27.9 29.9 93 31.4 28.2 111
SANDSTONE RS 8150 14.8 14.1 105 17.6 17.5 101
WHISKEY PARK 8950 26.3 27.3 96 24.8 26.2 95
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Basin wide percent of average 98 99
UPPER GREEN RIVER
BIG SANDY OPENING 9100 10.3 13.9 74 9.6 15.9 60
BLIND BULL SUM 8650 20.9 28.1 74 16.3 23.3 70
EAST RIM DIVIDE 7930 9.7 13.5 72 9.6 14.8 65
ELKHART PARK G.S. 9400 10.9 13.2 83 11.2 15.6 72
GROS VENTRE SUMMIT 8775 9.9 14.9 66 10.9 15.6 70
KENDALL R.S. 7740 12.3 14.5 85 12.2 15.2 80
LOOMIS PARK 8240 11.1 16.9 66 13.6 18.4 74
NEW FORK LAKE 8340 9.2 10.9 84 9.0 14.1 64
SNIDER BASIN 8250 10.8 14.3 76 10.7 14.8 72
SPRING CREEK DIVIDE 9000 19.9 26.7 75 19.2 26.7 72
TRIPLE PEAK 8500 19.2 24.5 78 19.2 30.4 63
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Basin wide percent of average 75 69
LOWER GREEN RIVER
HAMS FORK 7840 9.9 12.0 83 9.6 13.1 73
HEWINTA 9500 10.8 10.5 103 13.4 12.1 111
HICKERSON PARK 9150 10.6 6.2 171 11.3 8.7 130
HOLE-IN-ROCK 9150 7.8 5.9 132 10.0 8.7 115
INDIAN CREEK 9425 21.8 27.1 80 17.0 25.1 68
KELLEY R.S. 8180 14.0 16.4 85 14.5 18.3 79
STEEL CREEK PARK 10100 13.7 15.1 91 16.3 11.9 137
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Basin wide percent of average 95 94
UPPER BEAR RIVER
BUG LAKE 7950 20.6 19.7 105 19.6 18.3 107
HAYDEN FORK 9400 12.8 15.8 81 17.9 17.7 101
KELLEY R.S. 8180 14.0 16.4 85 14.5 18.3 79
LILY LAKE 9050 13.0 12.4 105 15.4 13.7 112
MONTE CRISTO 8960 28.8 27.6 104 24.6 24.0 103
SALT RIVER SUMMIT 7600 14.0 13.7 102 15.9 16.5 96
TRIAL LAKE 9960 19.3 24.2 80 20.1 22.5 89
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Basin wide percent of average 94 98
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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.