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 MONDAY: APRIL 26 , 1999
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 19.9 12.5 160 28.9 24.9 116
COTTONWOOD CREEK 7600 24.9 21.2 118 31.0 27.9 112
GRANITE CREEK 6770 19.7 14.5 136 24.4 26.4 93
GRASSY LAKE 7265 42.8 35.3 122 44.8 41.3 109
GROS VENTRE SUMMIT 8775 16.9 14.6 116 17.4 17.9 97
LEWIS LAKE DIVIDE 7860 41.0 35.3 117 42.8 42.0 102
PHILLIPS BENCH 8200 35.3 30.0 118 34.3 33.3 104
SALT RIVER SUMMIT 7600 16.0 11.9 136 20.4 18.9 108
SNAKE RIVER STATION 6920 19.0 17.2 112 27.9 29.0 96
SPRING CREEK DIVIDE 9000 34.3 29.7 116 31.7 30.4 105
THUMB DIVIDE 7980 -M 16.0 * -M 23.4 *
TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.5 101
TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.3 101
WILLOW CREEK 8450 33.3 31.9 105 41.7 35.8 117
----- -----
Basin wide percent of average 123 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.5 25.9 111 26.0 20.9 125
BLACK BEAR 7950 -M 40.0 * 49.0 45.8 108
CANYON 7940 16.9 11.9 144 20.7 16.0 129
FISHER CREEK 9100 37.8 38.5 99 39.4 41.4 96
MADISON PLATEAU 7750 -M 24.4 * 34.3 29.4 117
NORTHEAST ENTRANCE 7350 8.9 7.0 128 15.1 13.6 112
PARKER PEAK 9400 27.4 23.7 117 -M 17.9 *
SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141
THUMB DIVIDE 7980 -M 16.0 * -M 23.4 *
TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.3 101
WHISKEY CREEK 6800 21.7 16.2 134 26.2 24.5 107
WHITE MILL 8700 29.4 26.2 113 26.7 32.0 84
WOLVERINE 7650 12.0 9.4 128 14.4 15.0 96
----- -----
Basin wide percent of average 120 108
WIND RIVER
BURROUGHS CREEK 8750 18.2 13.7 133 19.9 19.0 105
COLD SPRINGS 9630 -M 7.5 * 18.2 12.7 143
DEER PARK 9700 25.2 -M * 28.7 -M *
HOBBS PARK 10100 27.4 17.7 156 24.2 16.9 145
LITTLE WARM 9620 17.7 11.5 156 19.9 16.0 126
SOUTH PASS 9040 24.9 18.0 139 26.2 20.2 131
ST. LAWRENCE ALT 8620 -M 6.0 * -M 12.2 *
TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.5 101
TOWNSEND CREEK 8700 -M 9.9 * -M 15.1 *
----- -----
Basin wide percent of average 146* 121
BIGHORN BASIN
BALD MTN. 9375 22.7 23.7 97 21.2 20.4 105
BEAR TRAP MEADOW 7900 2.8 5.1 55 13.0 10.4 126
BLACKWATER 9780 34.5 25.4 136 28.0 20.2 139
BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 117
EVENING STAR 9200 36.3 30.4 120 37.9 25.4 150
GRAVE SPRINGS 8550 11.5 11.4 102 15.4 12.0 128
KIRWIN 9550 15.6 11.6 135 17.7 13.0 138
MARQUETTE 8760 15.5 8.7 179 16.5 13.0 128
MIDDLE POWDER 7760 18.5 14.5 128 20.9 14.5 145
OWL CREEK 8975 9.1 3.9 234 9.7 7.8 125
POWDER RIVER PASS 9480 13.5 11.0 123 18.0 14.2 127
SHELL CREEK 9580 18.7 16.9 111 17.7 15.5 114
SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141
SYLVAN ROAD 8120 -M 9.0 * -M 18.4 *
TIMBER CREEK 7950 9.6 6.3 155 12.6 9.6 132
YOUNTS PEAK 8350 21.9 18.4 119 20.7 18.9 110
----- -----
Basin wide percent of average 122 129
SHOSHONE RIVER
BLACKWATER 9780 34.5 25.4 136 28.0 20.2 139
EVENING STAR 9200 36.3 30.4 120 37.9 25.4 150
KIRWIN 9550 15.6 11.6 135 17.7 13.0 138
MARQUETTE 8760 15.5 8.7 179 16.5 13.0 128
SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141
SYLVAN ROAD 8120 -M 9.0 * -M 18.4 *
YOUNTS PEAK 8350 21.9 18.4 119 20.7 18.9 110
----- -----
Basin wide percent of average 128 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.8 5.1 55 13.0 10.4 126
BIG GOOSE 7990 11.0 -M * 15.6 -M *
BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 117
BURGESS JUNCTION 7880 12.5 13.5 94 15.0 14.0 108
CLOUD PEAK RESERVOIR 9860 21.7 17.5 124 20.5 16.5 125
DOME LAKE 8880 -M 15.0 * 15.4 16.0 97
GRAVE SPRINGS 8550 11.5 11.4 102 15.4 12.0 128
HANSEN SAWMILL 8760 6.8 7.3 95 13.0 10.0 130
MIDDLE POWDER 7760 18.5 14.5 128 20.9 14.5 145
POWDER RIVER PASS 9480 13.5 11.0 123 18.0 14.2 127
SUCKER CREEK 8880 14.7 13.7 108 18.2 16.0 114
TIE CREEK 6870 -M -M * -M 13.5 *
----- -----
Basin wide percent of average 110 121
BELLE FOURCHE
BLIND PARK 6890 3.5 10.4 34 17.9 13.2 136
NORTH RAPID CREEK 6130 4.5 -M * 16.2 -M *
WARREN PEAK 6520 10.9 10.4 105 13.1 10.0 132
----- -----
Basin wide percent of average 70 134
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.2 22.9 80 26.4 27.7 96
DIVIDE PEAK 8800 22.2 20.2 111 29.2 26.7 110
ELK RIVER 8700 16.0 17.7 91 25.7 21.7 119
JOE WRIGHT 10120 23.4 24.7 95 30.2 29.5 103
NORTH FRENCH CREEK 10100 37.5 29.2 129 35.4 27.4 130
OLD BATTLE 10000 36.2 37.5 97 41.9 34.8 121
SOUTH BRUSH CREEK 8400 10.1 11.5 89 22.2 19.9 112
TOWER 10500 53.4 50.5 106 44.9 42.2 107
WEBBER SPRINGS 9200 22.2 26.9 83 30.9 29.9 104
WILLOW CREEK PASS 9540 14.7 13.5 109 14.0 15.0 94
----- -----
Basin wide percent of average 100 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.5 29.0 78 28.7 23.2 124
CASPER MTN. 7900 15.5 18.2 86 21.0 18.2 117
DEADMAN HILL 10220 19.9 18.7 107 21.2 20.4 104
DEER PARK 9700 25.2 -M * 28.7 -M *
LAPRELE CREEK 8320 .0 7.5 0 18.9 14.4 133
RENO HILL 8400 18.2 14.1 129 23.9 21.9 110
ROACH 9700 19.2 18.2 105 24.5 25.2 98
SAND LAKE 10080 44.2 36.8 120 35.5 24.2 148
SOUTH PASS 9040 24.9 18.0 139 26.2 20.2 131
WINDY PEAK 7840 8.6 8.5 103 16.4 11.9 139
----- -----
Basin wide percent of average 103 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.5 6.8 109 20.9 18.0 117
DIVIDE PEAK 8800 22.2 20.2 111 29.2 26.7 110
OLD BATTLE 10000 36.2 37.5 97 41.9 34.8 121
SANDSTONE RS 8150 10.5 11.6 91 24.0 22.4 108
WHISKEY PARK 8950 30.7 30.0 103 34.4 33.2 104
----- -----
Basin wide percent of average 101 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.4 14.5 121 17.7 18.2 97
BLIND BULL SUM 8650 30.7 25.4 121 24.0 26.7 91
EAST RIM DIVIDE 7930 14.9 15.0 100 15.5 17.2 91
ELKHART PARK G.S. 9400 15.5 14.5 108 16.9 17.9 95
GROS VENTRE SUMMIT 8775 16.9 14.6 116 17.4 17.9 97
KENDALL R.S. 7740 14.5 11.5 128 18.2 17.4 105
LOOMIS PARK 8240 -M 15.7 * 22.2 21.2 105
NEW FORK LAKE 8340 13.2 9.6 138 13.9 16.2 86
SNIDER BASIN 8250 19.9 13.9 144 19.9 17.0 118
SPRING CREEK DIVIDE 9000 34.3 29.7 116 31.7 30.4 105
TRIPLE PEAK 8500 30.0 25.7 118 33.0 34.5 96
----- -----
Basin wide percent of average 120 99
LOWER GREEN RIVER
HAMS FORK 7840 12.7 5.8 219 15.0 15.0 100
HEWINTA 9500 12.5 6.5 191 16.7 15.9 106
HICKERSON PARK 9150 6.5 4.1 159 13.1 12.0 111
HOLE-IN-ROCK 9150 9.6 3.7 267 13.5 12.0 113
INDIAN CREEK 9425 35.5 29.4 121 29.9 28.9 104
KELLEY R.S. 8180 17.4 16.0 110 21.5 21.0 103
STEEL CREEK PARK 10100 18.2 18.7 98 20.2 15.6 129
----- -----
Basin wide percent of average 134 109
UPPER BEAR RIVER
BUG LAKE 7950 24.2 17.4 140 24.4 22.2 110
HAYDEN FORK 9400 12.9 8.0 161 23.2 22.4 104
KELLEY R.S. 8180 17.4 16.0 110 21.5 21.0 103
LILY LAKE 9050 12.7 10.1 126 20.9 17.5 120
MONTE CRISTO 8960 33.2 27.2 122 31.4 29.7 106
SALT RIVER SUMMIT 7600 16.0 11.9 136 20.4 18.9 108
TRIAL LAKE 9960 22.2 24.7 90 25.4 27.7 92
----- -----
Basin wide percent of average 121 105
-----------------------------------------------------------------------------
-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.
----------------------------------------------------------------------------
-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.