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 WEDNESDAY: APRIL 29 , 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 12.1 11.4 106 22.9 25.0 92
COTTONWOOD CREEK 7600 18.0 20.4 88 25.6 28.0 91
GRANITE CREEK 6770 13.5 13.5 100 22.2 26.6 83
GRASSY LAKE 7265 30.8 34.4 90 38.4 41.6 92
GROS VENTRE SUMMIT 8775 12.1 14.2 85 14.9 18.0 83
LEWIS LAKE DIVIDE 7860 32.0 34.7 92 35.3 42.3 83
PHILLIPS BENCH 8200 27.8 29.7 94 28.9 33.4 87
SALT RIVER SUMMIT 7600 12.8 11.2 114 20.2 19.1 106
SNAKE RIVER STATION 6920 14.2 16.7 85 24.8 29.2 85
SPRING CREEK DIVIDE 9000 23.3 29.6 79 24.2 30.6 79
THUMB DIVIDE 7980 15.7 15.4 102 20.0 23.4 85
TOGWOTEE PASS 9580 25.6 28.1 91 26.7 31.7 84
TWO OCEAN PLATEAU 9360 31.3 27.5 114 30.3 34.5 88
WILLOW CREEK 8450 25.5 31.9 80 35.0 36.0 97
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Basin wide percent of average 92 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.4 25.9 79 18.3 21.0 87
BLACK BEAR 7950 -M 39.9 * 39.9 46.2 86
CANYON 7940 11.8 11.2 105 16.5 16.2 102
FISHER CREEK 9100 30.6 38.6 79 30.8 41.9 74
MADISON PLATEAU 7750 21.3 24.0 89 25.7 29.7 87
NORTHEAST ENTRANCE 7350 1.9 6.3 30 12.7 13.8 92
PARKER PEAK 9400 -M 23.6 * 17.8 18.0 99
SYLVAN LAKE 8420 17.6 23.8 74 22.6 22.1 102
THUMB DIVIDE 7980 15.7 15.4 102 20.0 23.4 85
TWO OCEAN PLATEAU 9360 31.3 27.5 114 30.3 34.5 88
WHISKEY CREEK 6800 15.6 15.6 100 21.4 24.7 87
WHITE MILL 8700 23.8 26.2 91 23.1 32.3 72
WOLVERINE 7650 4.7 8.6 55 10.9 15.0 73
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Basin wide percent of average 87 86
WIND RIVER
BURROUGHS CREEK 8750 16.8 13.2 127 19.3 19.2 101
COLD SPRINGS 9630 11.1 7.0 159 14.7 12.9 114
DEER PARK 9700 -M -M * 24.6 -M *
HOBBS PARK 10100 19.7 17.8 111 18.1 17.1 106
LITTLE WARM 9620 11.8 10.8 109 15.9 16.1 99
SOUTH PASS 9040 17.0 18.0 94 21.1 20.4 103
ST. LAWRENCE ALT 8620 10.8 5.6 193 12.9 12.3 105
TOGWOTEE PASS 9580 25.6 28.1 91 26.7 31.7 84
TOWNSEND CREEK 8700 12.4 9.6 129 17.0 15.3 111
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Basin wide percent of average 114 100
BIGHORN BASIN
BALD MTN. 9375 22.7 23.9 95 20.4 20.6 99
BEAR TRAP MEADOW 7900 4.5 4.5 100 11.5 10.4 111
BLACKWATER 9780 22.5 25.6 88 20.5 20.4 100
BONE SPRINGS DIV 9350 -M 18.4 * 19.8 17.9 111
EVENING STAR 9200 23.6 30.6 77 27.1 25.7 105
GRAVE SPRINGS 8550 12.2 -M * 13.9 12.2 114
KIRWIN 9550 13.3 11.6 115 15.9 13.1 121
MARQUETTE 8760 14.5 8.6 169 16.4 13.2 124
MIDDLE POWDER 7760 12.7 14.7 86 13.4 14.6 92
OWL CREEK 8975 7.7 3.6 214 9.7 8.0 121
POWDER RIVER PASS 9480 13.0 10.6 123 16.1 14.5 111
SHELL CREEK 9580 -M 16.9 * 13.8 15.7 88
SYLVAN LAKE 8420 17.6 23.8 74 22.6 22.1 102
SYLVAN ROAD 8120 6.9 8.3 83 15.3 18.4 83
TIMBER CREEK 7950 8.9 6.1 146 12.7 9.8 130
YOUNTS PEAK 8350 15.9 18.3 87 16.8 19.1 88
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Basin wide percent of average 97 104
SHOSHONE RIVER
BLACKWATER 9780 22.5 25.6 88 20.5 20.4 100
EVENING STAR 9200 23.6 30.6 77 27.1 25.7 105
KIRWIN 9550 13.3 11.6 115 15.9 13.1 121
MARQUETTE 8760 14.5 8.6 169 16.4 13.2 124
SYLVAN LAKE 8420 17.6 23.8 74 22.6 22.1 102
SYLVAN ROAD 8120 6.9 8.3 83 15.3 18.4 83
YOUNTS PEAK 8350 15.9 18.3 87 16.8 19.1 88
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Basin wide percent of average 90 102
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.5 4.5 100 11.5 10.4 111
BONE SPRINGS DIV 9350 -M 18.4 * 19.8 17.9 111
BURGESS JUNCTION 7880 13.0 13.4 97 15.1 14.2 106
CLOUD PEAK RESERVOIR 9860 19.0 17.6 108 19.8 16.8 118
DOME LAKE 8880 -M 15.0 * 16.4 16.2 101
GRAVE SPRINGS 8550 12.2 -M * 13.9 12.2 114
HANSEN SAWMILL 8760 8.9 7.0 127 13.6 10.1 135
MIDDLE POWDER 7760 12.7 14.7 86 13.4 14.6 92
POWDER RIVER PASS 9480 13.0 10.6 123 16.1 14.5 111
SUCKER CREEK 8880 13.5 13.7 99 16.9 16.3 104
TIE CREEK 6870 7.0 -M * 16.3 13.6 120
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Basin wide percent of average 104 110
BELLE FOURCHE
BLIND PARK 6890 3.2 9.8 33 13.8 13.5 102
NORTH RAPID CREEK 6130 5.3 -M * 11.7 -M *
WARREN PEAK 6520 9.3 9.8 95 12.4 10.1 123
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Basin wide percent of average 64 111
UPPER N. PLATTE RIVER
COLUMBINE 9400 15.8 22.4 71 25.3 27.9 91
DIVIDE PEAK 8800 18.4 19.6 94 22.4 27.0 83
ELK RIVER 8700 13.3 16.7 80 23.1 21.9 105
JOE WRIGHT 10120 23.4 24.6 95 27.3 29.9 91
NORTH FRENCH CREEK 10100 33.9 29.2 116 32.6 27.7 118
OLD BATTLE 10000 35.6 37.9 94 38.8 35.3 110
SOUTH BRUSH CREEK 8400 3.9 10.9 36 14.4 20.3 71
TOWER 10500 53.6 50.8 106 45.1 42.7 106
WEBBER SPRINGS 9200 20.5 26.3 78 28.6 30.2 95
WILLOW CREEK PASS 9540 9.6 13.5 71 9.5 15.2 63
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Basin wide percent of average 91 96
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.1 28.9 87 24.7 23.5 105
CASPER MTN. 7900 11.2 18.0 62 15.0 18.5 81
DEADMAN HILL 10220 17.5 18.9 93 17.1 20.8 82
DEER PARK 9700 -M -M * 24.6 -M *
LAPRELE CREEK 8320 5.2 6.8 76 12.7 14.5 88
RENO HILL 8400 10.9 13.7 80 13.7 22.2 62
ROACH 9700 15.9 18.1 88 19.5 25.5 76
SAND LAKE 10080 31.5 37.0 85 27.3 24.5 111
SOUTH PASS 9040 17.0 18.0 94 21.1 20.4 103
WINDY PEAK 7840 4.8 8.1 59 10.8 12.0 90
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Basin wide percent of average 83 89
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.3 5.6 95 17.5 18.3 96
DIVIDE PEAK 8800 18.4 19.6 94 22.4 27.0 83
OLD BATTLE 10000 35.6 37.9 94 38.8 35.3 110
SANDSTONE RS 8150 9.3 10.5 89 21.5 22.7 95
WHISKEY PARK 8950 29.4 29.7 99 31.1 33.6 93
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Basin wide percent of average 95 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.0 14.1 92 13.9 18.4 76
BLIND BULL SUM 8650 24.4 23.7 103 20.9 26.7 78
EAST RIM DIVIDE 7930 12.9 14.8 87 13.4 17.2 78
ELKHART PARK G.S. 9400 12.0 14.1 85 15.4 18.1 85
GROS VENTRE SUMMIT 8775 12.1 14.2 85 14.9 18.0 83
KENDALL R.S. 7740 10.0 10.9 92 16.6 17.5 95
LOOMIS PARK 8240 -M 15.3 * 19.1 21.3 90
NEW FORK LAKE 8340 8.9 9.3 96 12.6 16.3 77
SNIDER BASIN 8250 12.8 13.3 96 14.0 17.1 82
SPRING CREEK DIVIDE 9000 23.3 29.6 79 24.2 30.6 79
TRIPLE PEAK 8500 19.0 25.2 75 24.2 34.8 70
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Basin wide percent of average 88 80
LOWER GREEN RIVER
HAMS FORK 7840 6.2 5.7 109 13.1 15.1 87
HEWINTA 9500 10.4 5.8 179 17.4 16.1 108
HICKERSON PARK 9150 12.9 3.4 379 15.4 12.1 127
HOLE-IN-ROCK 9150 9.1 2.8 325 13.4 12.1 111
INDIAN CREEK 9425 25.3 29.1 87 21.8 29.0 75
KELLEY R.S. 8180 14.1 15.3 92 18.4 21.2 87
STEEL CREEK PARK 10100 20.9 18.8 111 21.6 15.9 136
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Basin wide percent of average 122 100
UPPER BEAR RIVER
BUG LAKE 7950 19.0 16.5 115 23.5 22.4 105
HAYDEN FORK 9400 12.6 7.1 177 23.6 22.7 104
KELLEY R.S. 8180 14.1 15.3 92 18.4 21.2 87
LILY LAKE 9050 13.6 9.2 148 20.7 17.8 116
MONTE CRISTO 8960 30.0 26.6 113 29.5 30.0 98
SALT RIVER SUMMIT 7600 12.8 11.2 114 20.2 19.1 106
TRIAL LAKE 9960 25.2 24.2 104 26.4 28.0 94
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Basin wide percent of average 116 101
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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.